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Sullivans Island City Zoning Code

ARTICLE IV

CC-COMMUNITY COMMERCIAL DISTRICT

Sec. 21-47. Change of district name.

   The CC-Community Commercial District (CC-District) was formerly known as the “OC-GC General Commercial and Office Commercial District.” This change in name neither affects the zoning boundary lines of the zoning district nor uses previously permitted or prohibited.

Sec. 21-48. Purpose and application of CC-Community Commercial District and CCOD 1 and 2 Overlay Districts. (3/20/12)

   A.   Purpose. It is the intent that the CC-Community Commercial District (and portions of the associated overlay zones CCOD 1 and CCOD 2) shall be developed and reserved for commercial business and office use for the benefit of Sullivan’s Island residents, and to encourage well-regulated residential land use. The regulations that apply within the district are designed to encourage the formation and continuance of a compatible and economically healthy environment for commercial and professional office uses that benefit from being located in close proximity to one another. It is also the intent to provide opportunities for residential uses to be developed at appropriate locations within the CC-District and CCOD 1 and 2 Overlay Districts under circumstances which will assure compatibility of neighboring commercial and residential activities. (3/20/12)
   B.   Application of zoning and design standards and design guidelines.
      (1)   Unless otherwise specifically identified as a Design Standard or Design Guideline, all of the standards under this Article shall be considered as Zoning Standards.
      (2)   Within the CC District and CCOD 1 and 2 Overlay Districts, all plans for new construction or for renovations which will change the exterior appearance must be reviewed in advance by the Design Review Board for neighborhood compatibility. (3/20/12)

Sec. 21-49. CC, CCOD 1 and CCOD 2. (Entire Section revised 3/20/12)

   A.   Generally. Sullivan’s Island contains lots that are, or previously were, split zoned lots. These are located generally between Station 20 1/2 and Station 22 1/2 that have frontage on Middle Street and I’on Avenue and Middle Street and Jasper Boulevard. These lots are shown in Exhibit 1.1 at the end of this section, and shall be divided into Districts and Overlay Districts to be known as CC, CCOD 1 and CCOD 2. In instances of unsubdivided lots within the CC District, and CCOD 1 and 2 Overlay Districts, the underlying (RS/CC) zoning boundary line bisecting split zoned lots and shall be retained and observed absent specific amendment by Council. (Please refer to the Official Zoning Map for exact demarcation of zoning district boundaries). In instances where lots are subdivided the subdivision shall occur along the pre-existing (RS/CC) zoning boundary. In instances in which specific CCOD 1 or CCOD 2 overlay rules conflict with the underlying base zoning (RS or CC) requirements or the general zoning, site planning, and use regulations set forth elsewhere within this code, then the more specific CCOD 1 and CCOD 2 Overlay provisions shall control for such parcels. In all other instances the more general underlying base zoning and ordinances of the Town of Sullivan’s Island shall apply.
   B.   Boundaries.
      1.   CC - The CC area may generally be described as consisting of those lots between Station 20 1/2 and Station 22 1/2 that have frontage on Middle Street and Ton Avenue and Middle Street and Jasper Boulevard. Some portions of the CC area are further divided into the CCOD 1 and CCOD 2 Overlay Districts for regulatory purposes. Town to provide revised description of CC district boundaries.
      2.   CCOD 1 - The CCOD 1 Overlay District may generally be described as consisting of those lots between Middle Street and Jasper Boulevard from Station 22 1/2; to Station 22. This area is comprised of the parcels identified as TMS Numbers 529-05-00084, 529-05-00034, 529-05-00033, 529-05-00032, 529-05-00031 and 529-05-00030 (five parcels of land) as well as any additional parcels later created by subdivision or replatting of these listed parcels. See Exh. 1.1.
      3.   CCOD 2 - The CCOD 2 Overlay District area may generally be described as consisting of those lots between I’On Avenue and Middle Street from Station 22 to 2019 Middle Street and 2120 Middle Street. This area is comprised of the parcels identified as TMS Numbers 5290900014, 5290900109, 5290900096, 5290900106, 5290900017, 5290900095, 5290900114, 5290900097, 5290900111, 5290900108, 5290900125, 5290900015, 5290900110, 5290900103, 5290900107, 5290900093, 5290900094, 5290900124, 5290900018, 5290900019, 5290900020, 5290900021, 5290900022, 5290500086, 5290500035, 5290500087 and 5290500085 (twenty-seven parcels of land) as well as any additional parcels later created by subdivision or replatting of these listed parcels See Exh. 1.1.
COMMUNITY COMMERCIAL OVERLAY DISTRICT PROPERTIES
EXHIBIT 1.1
DISTRICT #1
DISTRICT #2
DISTRICT #2
TMS#
TMS#
TMS#
DISTRICT #1
DISTRICT #2
DISTRICT #2
TMS#
TMS#
TMS#
5290500084
5290900014
5290900107
5290500034
5290900109
5290900093
5290500033
5290900096
5290900094
5290500032
5290900106
5290900124
5290500032
5290900017
5290900018
5290500031
5290900095
5290900019
5290500030
5290900114
5290900020
5290900097
5290900021
5290900111
5290900022
5290900108
5290500086
5290900125
5290500035
5290900015
5290500087
5290900110
5290500085
5290900103
 
   C.   Subdivision of Lots
      1.   The subdivision of split-zoned lots within the CCOD 1 and 2 Overlay Districts is permitted as specified herein, but shall not be required. For split-zoned lots that are not subdivided the split-zoning shall remain undisturbed absent amendment by Council.
      2.   Parcels within the CCOD 1 and 2 Overlay Districts may be subdivided, provided that the bisecting boundary line accomplishing the subdivision is placed along the pre-existing RS / CC zoning district boundary line as shown on the Official Zoning Map. See Exh. 1.1. Absent specific zoning amendment by Council, each of the parcels resulting from subdivision shall retain the respective underlying (RS or CC) base zoning designation previously associated with the particular land area while split-zoned, subject of course to any Overlay District modifications.
      3.   Subdivisions in the CCOD 1 and 2 Overlay Districts accomplished in accordance with this subsection above are permitted without regard to the minimum lot requirements specified in Sections 21-12(A)(1), 21-12(A)(3) and 21-21. Lots subdivided in this manner shall be considered conforming lots of record, but may not be further subdivided. Subdivision of lots in this fashion must, however, meet all other requirements of Section 21-12 as well as all requirements of Section 21-51 regarding utility easements and meters.
      4.   Notwithstanding the provisions of Sec. 21-19(C), in the event that split-zoned lots are subdivided in accordance with the provisions of Section 21-49, the commercial and residential lots so created may be owned by different owners.
   D.   C Standards Outside of CCOD 1 and 2 Overlay Districts. Applicable development standards may be found in Sections 21-50 through 66, among others.
   E.   CCOD 1 Standards.
      1.   CCOD 1 RESIDENTIAL CONSTRUCTION.
         a.   For single family residences constructed on the residential (RS) portion of the split zoned lots or on residentially zoned lots within the CCOD 1 Overlay District, the site planning and other development and zoning requirements applicable to RS zones shall apply except that
            (i)   a principal building square footage bonus not to exceed fifteen (15%) percent; and/or
            (ii)   a building height bonus not to exceed fifteen (15%) percent 3 ; and/or
            (iii)   a side setback reduction from those currently set forth with respect to RS Districts (though in no event shall a side setback of less than ten (10’) feet be permitted);
            may be approved by the Design Review Board when such bonus(es) or reduction would improve neighborhood compatibility or further other goals of the Town’s Comprehensive Plan. An illustration of the application of these various rules can be seen in Table 1.1. See also, generally among others, Sections 21-19 through 46, for additional standards.
         b.   For the purpose of calculating Principal Building square footage, lot coverage, impervious coverage, and other standards for land located within the residential portion CCOD 1 Overlay District, only that portion of the Lot Area base zoned RS shall be considered in the calculations.
         c.   Single family residences to be constructed within CCOD 1 Overlay District must be constructed with all exterior walls facing Middle Street appropriately built for sound proofing. Additionally, the rear facade (i.e. facade facing Middle Street) shall not employ a flat, single plane aspect. Rear facade design and rear wall soundproofing specifications shall be approved by the Design Review Board prior to permitting.
         d.   The bottom elevation of a Principal Building’s 1st floor joists shall be no more than one (1) foot above the FEMA base flood elevation.
         e.   Permitted uses shall be determined by reference to Section 21-20 (Principal Uses) and Article XV of these Ordinances (Accessory Uses).
         f.   In order to facilitate the objectives of neighborhood compatibility, front and rear setbacks described within Section 21-22 may be reduced by the Design Review Board, but in no case shall the combined total front and rear setbacks be less than forty (40’) feet and the front setback shall not be less than fifteen (15’) feet.
         g.   Dormers. Conforming front dormers shall be exempt from the 1:1 front yard setback rule described in Section 21-22(B)(4)(a). Dormers constructed in accordance with this exemption shall be limited to twenty (20%) percent of the roof area with no one dormer exceeding six (6’) feet in length measured at the portion of the wall plate parallel to the exterior of the structure at the lowest roof edge. Front dormers constructed in the residential portions of the CCOD 1 district shall not, however, be eligible for the Design Review Board modification described in Section 21-22(B)(4)(c).
CCOD 1 Residential Construction
Illustration Table 1.1
 
Lot Size
Principal Building Square Footage 2
Principal Building Square Footage Plus Max. 15% Bonus
Principal Building Height
Principal Building Height Plus Max. 15% Bonus
10,890
2391 sf
2750 sf
30.4 ft
35.0 ft
7000
2080 sf
2392 sf
30.4 ft
35.0 ft
 
      2.   CCOD 1 Commercial
         a.   For buildings constructed on the commercial (CC) portion of lots or commercial (CC) lots within the CCOD 1 Overlay District the site planning and other development and zoning requirements applicable to CC zones shall apply except that:
            (i)   for purposes of the maximum structure size calculations described in Section 21-52(A)(1) the size limit percentage shall be fifty-two (52%) percent rather than the typical fifty-seven (57%) percent, and for the calculations described in Section 21-52(A)(2) the listed 2.72% figure shall be replaced with three (3%) percent 3 ; and
            (ii)   a principal building square footage bonus not to exceed fifteen (15%) percent may be approved by the Design Review Board when such bonus(es) would improve neighborhood compatibility or otherwise further the goals of the Town’s Comprehensive Plan; and/or
            (iii)   a building height bonus not to exceed twenty (20%) percent may be approved by the Design Review Board when such bonus(es) would improve neighborhood compatibility or otherwise further the goals of the Town’s Comprehensive Plan. 4
         An illustration of the application of the rules generally governing such construction can be seen in Table 1.2. See also, generally among others, Sections 21-50 through 66, for additional standards.
         b.   For the purpose of calculating Principal Building square footage, lot coverage, impervious coverage, and other standards, only that portion of the Lot Area base zoned CC-Community Commercial District shall be considered in the calculations.
         c.   Foundation height shall be determined by reference to Sec. 21-59 (A) and (B). The Design Review Board shall not be permitted to consider variances from these requirements.
         d.   Permitted uses for structures on the commercial portion of a lot within the CCOD 1 Overlay District shall be governed by Section 21-50 and Article XV of these Ordinances.
         e.   The first floor of the structure must be used exclusively for one or more commercial uses as described in Section 21-50 except for building access for the upper floor, mechanical, utilities and similar uses.
         f.   If developed for commercial and residential use, the structure shall have a balanced appearance and present a harmonious and substantially uniform width facing Middle Street.
CCOP 1 Commercial Construction
Illustration Table 1.2
 
Lot Size
Principal Building Square Footage
Principal Building Square Footage Plus Max. 15% Bonus
Principal Building Height
Principal Building Height Plus Max. 20% Bonus
10,890
4530 sf
5210 sf
30.4 ft
36.5 ft
7000
3696 sf
4250 sf
30.4 ft
36.5 ft
 
   F.   CCOD 2 Standards.
      1.   CCOD 2 RESIDENTIAL CONSTRUCTION.
         a.   For Single-family residences constructed on the residential (RS) portion of split-zoned lots or residential (RS) lots within the CCOD 2 Overlay District, the site planning and other development and zoning requirements applicable in RS zones shall apply except that:
            (i)   a principal building square footage bonus not to exceed fifteen (15%) percent; and/or
            (ii)   a building height bonus not to exceed twenty (20%) percent 5 ;
         may be approved by the Design Review Board when such bonus(es) would improve neighborhood compatibility or otherwise further the goals of the Town’s Comprehensive Plan. An illustration of the application of these rules may be seen in Table 1.3. See also, generally among others, Sections 21-19 to 46, for additional standards.
         b.   For the purpose of calculating Principal Building square footage, lot coverage, impervious coverage, and other standards for land located within the residential portion CCOD 2 Overlay District, only that portion of the Lot Area base zoned RS shall be considered in the calculations.
         c.   The bottom elevation of a Principal Building’s 1st floor joists shall not exceed the lower of seven (7’) feet above grade or two (2’) feet above the FEMA base flood elevation. See also Section 21-31(B)(1)(2).
         d.   Permitted uses shall be as described in Section 21-20 and Article XV of these Ordinances.
CCOD 2 Residential Construction
Illustration Table 1.3
 
Lot Size
Principal Building Square Footage
Principal Building Square Footage Plus Max. 15% Bonus
Principal Building Height
Principal Building Height Plus Max. 20% Bonus
10,890
2989 sf
3437 sf
30.4 ft
36.5 ft
 
      2.   CCOD 2 Commercial - Middle Street Lots.
         a.   Buildings constructed on the commercial portion of split-zoned lots or a commercial lot within the CCOD 2 Overlay District the site planning and other development and zoning requirements applicable to CC zones shall apply except that:
            (i)   for purposes of the maximum structure size calculations described in Section 21-52(A)(1) the size limit percentage shall be fifty-two (52%) rather than the typical fifty-seven (57%) percent, and for the calculations described in Section 21-52(A)(2) the listed 2.72% figure shall be replaced with three (3%) percent 6 ; and
            (ii)   a principal building square footage bonus not to exceed fifteen (15%) percent may be approved by the Design Review Board when such bonus(es) would improve neighborhood compatibility or otherwise further the goals of the Town’s Comprehensive Plan: and/or
            (iii)   a building height bonus not to exceed twenty (20%) percent may be approved by the Design Review Board when such bonus(es) would improve neighborhood compatibility or otherwise further the goals of the Town’s Comprehensive Plan. 9
         An illustration of the application of these rules may be seen in Table 1.4. See also, generally among others, Sections 21-50 through 66, for additional standards.
         b.   For the purpose of calculating Principal Building square footage, lot coverage, impervious coverage, and other standards, only that portion of the Lot Area base zoned CC-Community Commercial District shall be considered in the calculations.
         c.   Foundation height shall be determined by reference to Sec. 21-59 (A) and (B). The Design Review Board shall not be permitted to consider variances from these requirements.
         d.   Permitted uses for structures on the commercial portion of a lot within the CCOD 2 Overlay District shall be governed by Section 21-50 and Article XV of these Ordinances.
         e.   The first floor of the structure must be used exclusively for one or more commercial uses as described in Section 21-50 except for building access for the upper floor, mechanical, utilities and similar uses.
         f.   If developed for commercial and residential use, the structure shall have a balanced appearance and present a harmonious and substantially uniform width facing Middle Street.
CCOD 2 Commercial Construction
Illustration Table 1.4
 
Lot Size
Principal Building Square Footage
Principal Building Square Footage Plus Max. 15% Bonus
Principal Building Height
Principal Building Height Plus Max. 20% Bonus
10,890
4530 sf
5210 sf
30.4 ft
36.5 ft
 

Sec. 21-50. Permitted uses, conditional uses and prohibited uses.

   A.   Permitted uses in CC-District.
      (1)   Retail businesses:
         (a)   Art and framing shop;
         (b)   Candy shop; (8-19-14)
         (c)   Bicycle shop without outdoor storage;
         (d)   Clothing, accessories or fabric shop;
         (e)   Gift or collectibles shop;
         (f)   Jewelry/watch shop and repairs;
         (g)   Stationery and book shop;
         (h)   Toy or hobby shop;
         (i)   Pharmacy with no drive through;
         (j)   Music store;
         (k)   Florist shop; and
         (l)   Woodworking shop.
      (2)   Personal services:
         (a)   Barber shop or beauty salon;
         (b)   Cleaners, drop-off and pick-up only;
         (c)   Dental or medical office;
         (d)   Dressmaker, seamstress, or tailor;
         (e)   Financial, legal and insurance services;
         (f)   Photographic studio and sales;
         (g)   Real estate or property management agency;
         (h)   Studies for instruction in art, music, fitness, dancing, drama, or similar activity;
         (i)   Shoe repair; and
         (j)   Liquor store.
      (3)   Offices for government, business, professional or general purposes.
   B.   Conditional uses in the CC-District.
      (1)   Bakeries and Delicatessens as defined in Section 21-203. (8-19-14)
      (2)   Specialty grocery store limited to five thousand (5000) square feet.
      (3)   Video sales/rental: limited to hours between 8:00 a.m. and 11:00 p.m.
   C.   Special Exceptions in the CC-District.
      (1)   Restaurants as defined in Section 21-203 (8-19-14)
         (a)   The use as a restaurant shall only be permitted on existing lots zoned CC-Community Commercial in the block of Middle Street between Station 22-1/2 and Station 22; provided, however, that no new bars or restaurants may be established within three hundred (300) feet of any existing bar or restaurant. The distance of separation between the two uses shall be measured in a straight line between the front doors of each use without regard to intervening structures or objects. (12/16/08) (8-19-14)
         (b)   Outdoor patios, porches and decks are permitted only on the front facing main floor of the Principal Building; (3/20/12)
         (c)   The hours of operation shall be limited to 6:00 a.m. to 2:00 a.m.; and, (8-19-14)
         (d)   No outdoor entertainment or speaker system is permitted, but this shall not prevent the service of food and drinks on porches, decks and patios.
      (2)   Coffee Shop as defined in Section 21-203. (8-19-14)
         (a)   Coffee shops shall only be permitted on existing lots zoned CC-Community Commercial provided, however, that no new coffee shop may be established within 300 feet of any existing coffee shop. The distance of separation between the two uses shall be measured in a straight line between the front doors of each use without regard to intervening structures or objects. (8-19-14)
         (b)   Contains no more than twenty-five (25) seats with no more than seven hundred (700) square feet of interior floor area devoted to patron seating. (8-19-14)
         (c)   In addition, outdoor patios, porches and decks are permitted provided such outdoor space does not exceed twenty-five (25) percent of the coffee shop’s available floor area devoted to patron seating. The total number of patron seats inclusive of outdoor patios, porches and decks, shall not exceed twenty-five (25). (8-19-14)
         (d)   The hours of operation shall be limited to 6:00 a.m. to 10:00 p.m.; and (8-19-14)
         (e)   No outdoor entertainment or speaker system is permitted, but this shall not prevent the service of food and beverages on porches, decks and patios. (8-19-14)
         (f)   Coffee shop uses shall be limited to preparing light meals with appliances which do not require Type 1 or Type II kitchen exhaust hood system inspections per SCDHEC Section 6-8-20; Subsection 8-400. (8-19-14)
      (3)   Upper Story Residential.
         (a)   Upper Story Residential shall only be permitted on the commercial portion of lots designated CC, CCOD 1 and CCOD 2; and (3/20/12)
         (b)   Parking provided for Upper Story Residential shall be in addition to the required parking of the ground floor use unless a shared parking plan is approved; and,
         (c)   No Upper Story Residential shall be used as a Vacation Rental; and,
         (d)   No more than two (2) dwelling units per lot shall be permitted as Upper Story Residential uses; (3/20/12)
         (e)   The total square footage devoted to Upper Story Residential shall not exceed two (2) times the amount of ground floor principal square footage devoted to commercial use. (3/20/12)
         (f)   No residential uses are permitted above restaurants or bars and;
         (g)   The proposed uses must be consistent with Sec. 21-48. (3/20/12)
      (4)   Short-Term Auto Parking Lot.
         (a)    "Short-term auto parking lot" shall be defined as a general use surface parking lot located within the Commercial District (CC District) for use during daytime and night-time hours of operation and shall be limited to the commercial portions of lots located within the CC, CCOD 1 and CCOD 2 areas. Overnight parking shall be prohibited and monitored by the property owner.
         (b)   There shall be no long-term parking or storage of vehicles, boats, trailers or other recreational vehicles; and
         (c)   Short-term auto parking lots must comply with the parking design requirements of Article XV, Sec. 21-143 D.
   D.   Prohibited uses in the CC-District.
      (1)   Bars as defined in Section 21-203 or any business that serves alcoholic beverages for on premise consumption, which generates greater than fifty (50) percent of total revenue from alcohol sales. (8-19-14)
      (2)   Formula restaurants as defined in Section 21-203. (8-19-14)
      (3)   Businesses selling gasoline or any other businesses handling hazardous chemical wastes;
      (4)   Automated teller machine, drive-through or walk up windows, drive-in or drop-off, or night drop windows;
      (5)   Outdoor storage of vehicles, supplies, or equipment associated with a commercial or office enterprise.
      (6)   Vacation Rentals.
      (7)   On the commercial portion of a CC lot or a commercial lot within the CCOD 1 and 2 areas, structures principally dedicated to, or designed for, first floor residential use (i.e. single family residential structures, first floor apartments, or first floor condominiums.) (3/20/12)
      (8)   No uses shall be allowed in the CC-District unless specifically provided in Section 21-50 (A) - (C) herein.
   E.   Parking and sign requirements. Parking requirements for uses within the CC, CCOD 1 and CCOD 2 Districts shall be in accordance with Accessory Uses and Structure – Parking, ARTICLE XV. Sec. 21-143. Sign requirements within the CC-Community Commercial District shall be in accordance with Sign Regulations, ARTICLE XIV. (3/20/12)
(Ord. 2021-17, passed 11-16-2021)

Sec. 21-51. Electrical and water meters and associated easements. (3/20/12)

   A.   Additional Meters. Nothing contained in this Zoning Ordinance shall prohibit the lawful existence or installation of additional meters on CC-District land (including land within the CCOD 1 and 2 Overlay Districts), provided such meter or meters are duly authorized by the Town of Sullivan’s Island. Additional water and sewer capacity from the Town’s water and sewer systems is necessary and therefore must comply with all State and Federal Regulations as well as Chapters 50 and 51 of the Town’s Ordinances. Specifically Sections 50.06, 50.07 and 50.10, there is only one sewer tap per single lot allowed and in accordance with Section 50.06, every property must have a sewer tap into the system. (3-20-12)
   B.   CCOD 1 and 2: Easements and Line Installations Required Prior to Subdivision. (3/20/12) The owner of a split zone lot shall, prior to subdividing the lot or prior to obtaining a building permit to construct a building on the lot shall;
      (1)   Obtain a water and sewer tap for the portion of the lot zoned commercial (if it does not already have one that is operable) and a water and sewer tap for the portion of the lot zoned residential (if it does not already have one that is operable); The cost of the sewer and water taps shall be paid by the Owner of said lot in an amount to be determined by the Town’s Water and Sewer Department; and (3/20/12)
      (2)   (a)   Provide a reasonable size utility easement that will run with the land connecting with the Town’s water and sewer lines (on Jasper Avenue for CCOD 1 lots and I’on Avenue or Station 22 for CCOD 2 lots) and extending to the portion of the lot zoned commercial. The easement shall be owned and maintained by the Owner of that portion of the lot zoned commercial at the Owner’s sole expense; and (3/20/12)
         (b)   Construct water and sewer lines within said easements at the Owner’s sole expense and the Owner shall maintain repair or replace said sewer and water lines as required by the Town’s Water and Sewer Department, at the Owner’s sole expense; and the Town’s Water and Sewer Department shall provide the specifications of the water and sewer lines and the Owner shall obtain the approval of the Town’s Water and Sewer Department prior to subdividing or obtaining a building permit or, with the approval of the Town, to provide to the Town Water and Sewer Department an estimate of the cost to do such work that is satisfactory to the Water and Sewer Department and post with the Town a bond equal to one and one-half times the amount of such estimate to ensure that required water and sewer lines will be constructed as required; and (3/20/12)
         (c)   In the event the Town has installed water and sewer lines along or in Middle Street adjacent to a split zoned lot, then prior to subdividing the lot or obtaining a building permit to construct a building on the lot, the Owner shall pay to the Town 25% (twenty five percent) of the total cost incurred by the Town in constructing the water and sewer lines along Middle Street in the CCOD 1 and the Owner shall pay to the Town 12.5% (twelve and one half percent) of the total cost incurred by the Town in constructing the water and sewer lines along Middle Street in the CCOD 2. (3/20/12)

Sec. 21-52. Maximum structure size

   A.   For buildings in the CC Community Commercial District constructed no more than three (3) feet above grade.
      (1)   For lots whose CC Community Commercial District portion is 10,346 square feet (approximately (plus or minus 5%) one fourth acre) or greater, the maximum number of square feet shall be no greater than fifty-seven percent (57%) of the area of the CC Community Commercial District portion of the lot; and
      (2)   For lots whose CC Community Commercial District portion is less than 10,346 square feet (95% of one fourth of an acre), the maximum number of square feet, expressed as percentage of the area of the CC Community Commercial District portion of the lot, shall be no greater than 87%, minus 2.72% for every 1000 square feet of area platted.
   B.   For buildings constructed more than three feet (3’) above grade, the maximum number of square feet shall be no greater than two thirds of the numbers determined in 21-52 A(1) and (2).
   C.   Notwithstanding any of the requirements in Sec. 21-52 A-B above, commercial buildings in the CCOD 1 and 2 Overlay Districts may be permitted only if the building square footage shall not exceed 80% of what is permitted in Sec. 21-52 A-B. (6-19-07) (3/20/12)

Sec. 21-53. Front, side and rear setbacks.

   A.   Encroachments into yard setbacks.
      (1)   For the purpose of determining the Setbacks required for a Principal Building, it shall not include encroachment by
         (a)   eave overhangs to thirty (30) inches;
         (b)   step treads below a height of six (6) feet, so long as the total width of all such stairways does not exceed ten (10) feet of the run of the affected property line;
         (c)   HVAC stands within five (5) feet of the Principal Building located in the Side or Rear Yards, or
         (d)   Driveways/parking access to the lot area rear yard.
      (2)   In no case shall there be any other type of encroachment into the required Setbacks by any type of structure unless expressly permitted hereafter.
   B.   Minimum front yard setback.
      (1)   Front Yard Setback.
         (a)   The required Front Yard Setback shall be no less than five (5) feet and no greater than ten (10) feet.
         (b)   The Front Yard Setback may be used for porches or patios provided adequate room remains for a six (6) foot walkway between the curb/pavement edge and the Principal Building (walkway may be contained within the public right-of-way and/or Front Yard Setback area).
      (2)   Corner lot. The required Front Yard Setback for a Corner Lot shall be no less than five (5) feet and no greater than ten (10) feet with a minimum street corner visibility clearance equivalent to that which would occur with both the Side Yard Setback and the Front Yard Setback being ten (10) feet.
      (3)   Additional Front Yard Setback: (3/20/12)
         (a)   Except for dormers, for any portion of a Principal Building’s height exceeding twenty (20) feet, that portion in excess of twenty (20) feet shall be set back from the Front Yard Setback an additional one (1) foot for every one (1) foot of increased height above twenty (20) feet as measured at the front yard setback. (3/20/12)
         (b)   Explanation. (3/20/12)
            i.   This requirement creates a Front Yard Setback “building envelope” within which the Principal Building’s front facade shall fit. (3/20/12)
            ii.   The additional front setback line shall be measured as a straight line from the Front Lot Line to the required setback line, then turning at a 90 degree angle and extended twenty (20) feet vertically, and then angled at a 45-degree slope to infinity (1-foot of run to 1-foot of rise). (3/20/12)
   C.   Minimum side yard setback.
      (1)   The required Side Yard Setback shall be zero (0) foot to five (5) feet
      (2)   A zero (0) foot Side Yard Setback shall be permitted on one (1) side if a Principal Building is developed as an attached building to an adjacent Principal Building located on an adjacent lot.
      (3)   Driveway/parking access to the Lot Area’s rear yard shall be separately provided for each lot; provided however, driveway/parking access to the Lot Area’s rear yard may be provided jointly by adjacent property owners, so that a lot owner may be exempt from a requirement to provide driveway/parking access to the Lot Area’s rear yard upon documentation of a joint access agreement with an adjacent property owner.
      (4)   Accessory structures Side Yard Setbacks. See ARTICLE XV for Setbacks required for Accessory Structures.
   D.   Minimum rear yard setback.
      (1)   The minimum Rear Yard Setback from the adjoining residentially zoned portion of the lot shall be fifteen (15) feet.
      (2)   Accessory structures Rear Yard Setbacks. See ARTICLE XV for Setbacks required for Accessory Structures.

Sec. 21-54. Building height.

   A.   No Principal Building shall be erected, altered or moved so as to exceed thirty-eight (38) feet in overall height.
   B.   Building height shall be measured in a straight line from the highest point of the Principal Building, excepting any chimney, to the natural ground elevation at the center point of the Principal Building.
   C.   Elevated Lot: In no case shall the highest point of a Principal Building be higher than forty (40) feet above the crown of the street nearest to the center of the foundation.
      (1)   Example: Natural ground elevation is three (3) feet above street crown; maximum Principal Building height = 37 feet.
   D.   Religious institutions: A height limit of 60 feet shall apply to spires, belfries, cupolas and domes not intended for human occupancy located on the Principal Building.
   E.   Notwithstanding any of the requirements in Sec. 21-54 A-C above, structures on lots in the CCOD 1 and 2 Overlay Districts may be permitted only if the principal building height shall not exceed 80% of the maximum height otherwise permitted in Sec. 21-54 A-C; provided, however, that buildings in such Overlay districts may be eligible for bonuses as set forth in Section 21-49 (E) and (F). (6-19-07) (3/20/12)

Sec. 21-55. Impervious coverage area.

   A.   Definitions.
      (1)   Impervious Coverage Area. That portion of the Lot Area covered by an impervious surface.
      (2)   Impervious Surface: Any material or structure through which water cannot be absorbed or passed without limitation, including but not limited to roofed structures, compacted soil or stone, pavement consisting of asphalt, concrete, oil and stone, tar, or asphalt. Impervious surfaces also include building foundations, porches, decks, patios, sidewalks, play courts (tennis, basketball, etc.), pools, and other improvements that impede the absorption of water. Grassed or mulched areas are not considered impervious materials.
      (3)   Pervious Surface: Any material through which water can be easily absorbed or passed, at a minimum infiltration rate of 2.0 inches per hour, such as, but not limited to, grass and uncompacted gravel, shell and crushed stone. (1/20/09).
   B.   Permitted impervious coverage area.
      (1)   Impervious Coverage area shall be no more than fifty percent (50%) of the commercially zoned portion of a Lot Area of twelve thousand (12,000) square feet or greater. For commercially zoned portions with smaller areas, Impervious Coverage areas are limited as follows:
         (a)   Impervious Coverage shall be no greater than (50% times Lot Area) plus [(12,000 sf minus the Lot Area) times 5 percent].
         (b)   Sample Equation (10,000 sf Lot Area): (50% x 10,000 sf) + [(12,000 sf - 10,000 sf) x 5%] = 5100 sf Impervious Coverage permitted (51%).
      (2)   Examples:
         (a)   Lot 8,000 sf = 4200 sf Impervious Coverage (52.5%)
         (b)   Lot 6,500 sf = 3525 sf Impervious Coverage (54.2%)
      (3)   Driveways and parking areas shall be developed using pervious paving materials but no additional Impervious Coverage area shall be granted based on the use of pervious materials.
   C.   Design Review Board. The Design Review Board may grant up to a fifteen percent (15%) modification in square feet of impervious coverage in this Zoning Standard if this or other modifications achieves greater Neighborhood Compatibility as described in Article XII.

Sec. 21-56. Third story.

   A.   The Enclosed Portion of any third Story of any Principal Building shall be no greater than four hundred (400) square feet and shall only have fifty percent (50%) of its wall area projecting outside the roof area as measured from the outside of the wall studs; unless either of the following apply:
      (1)   if the Principal Building’s finished floor elevation has been constructed within three feet (3’) of grade, third floor enclosed portion shall be no greater than fifty percent (50%) of the square feet of the second floor and shall only have fifty percent (50%) of its wall area projecting outside the roof area as measured from the outside of the wall studs; and
      (2)   for residential uses in the CC Community Commercial district, third floor enclosed portion shall be no greater than fifty percent (50%) of the square feet of the second floor and shall only have fifty percent (50%) of its wall area projecting outside the roof area as measured from the outside of the wall studs.
   B.   The Design Review Board may grant up to a fifteen percent (15%) modification in this Zoning Standard if this or other modifications achieves greater Neighborhood Compatibility as described in Article XII.

Sec. 21-57. Roof decks and roof gazebos.

   A.   Purpose. Roof decks and roof gazebos increase a Principal Building’s mass and scale and are often an incompatible design feature.
   B.   Design standard.
      (1)   Roofs with pitch of 3/12 (three inches in twelve inches) or less are prohibited.
      (2)   Flat roofs, roof decks and roof gazebos are prohibited.

Sec. 21-58. Orientation of Principal Building.

   A.   Purpose. Principal Buildings with street oriented “front doors” contribute to the sense of “neighborliness” of the Island; having a consistent front yard orientation, reduces the possibility of accessory structures being located inconsistent with the pattern of development.
   B.   Definition.
      (1)   Primary Front Facade. The largest front facing surface of a Principal Building that is parallel or nearly parallel to the front yard street frontage and is considered to be the front of the structure.
   C.   Design standards. Principal Building’s primary facade (front door) shall be oriented toward Middle Street.
   D.   Design Review Board. In interpreting and applying this Design Standard, the Design Review Board shall refer to the Standards of Neighborhood Compatibility as described in Article XII.

Sec. 21-59. Foundation height (Commercial District Regulations).

   A.   Purpose. Due to FEMA regulations and Hurricane Hugo, the foundations of Principal Buildings are substantially elevated; although not presently the case within the CC-District, this provision is intended to prevent Principal Buildings from being elevated higher than FEMA requirements.
   B.   Design standards for Elevated Buildings.
      (1)   The bottom elevation of a Principal Building’s 1st floor joists shall be no more than two (2) feet above the FEMA base flood elevation.
      (2)   The Principal Building’s finished floor shall not be more than three (3) feet above the FEMA base flood elevation.
      (3)   Exception: For Principal Buildings constructed no more than three feet (3’) above grade, the rear one half (1/2) of the Principal Building may be elevated to permit parking underneath the Principal Building.
   C.   Design Review Board. The Design Review Board may grant a modification in this Design Standard of no more than one foot if this or other modifications achieves greater Neighborhood Compatibility as described in Article XII.

Sec. 21-60. Foundation enclosure.

   A.   Purpose. The treatment of a Principal Building’s foundation has a large impact on the mass and scale of the structure. Foundations more open by design diminish a structure’s mass.
   B.   Design standards.
      (1)   A Principal Building’s foundation exceeding three (3) feet in height shall be enclosed by open lattice or slats having a minimum of one half (1/2) inch between lattice or slats.
      (2)   Solid enclosure materials such as brick or stucco may only be used as building materials for supporting the foundation and are limited to four (4) feet in width and depth and occurring no more often than every eight (8) feet on the exterior portions of the foundation.
   C.   Design Review Board. The Design Review Board may grant up to a fifteen percent (15%) modification in this Design Standard if this or other modifications achieves greater Neighborhood Compatibility as described in Article XII.

Sec. 21-61. Windows and doors.

   A.   Purpose. Large expanses of uninterrupted walls increase the mass and scale of a Principal Building; large expanses of walls broken by windows, doors and porches diminish this impact.
   B.   Design guideline.
      (1)   Doors, windows or glass openings shall comprise at least forty percent (40%) of any Principal Building’s Front Facade.
      (2)   Front Facades encompassed by porches having a depth of eight (8) feet or more may reduce to thirty percent (30%) that portion devoted to windows/doors with glass openings.
   C.   Design Review Board. This is a Design Guideline not binding on the applicant. The Design Review Board may encourage the use of this guideline for achieving greater Neighborhood Compatibility as described in Article XII.

Sec. 21-62. Site lighting.

   A.   Purpose. Highly illuminated structures or lots are not compatible with the character of Sullivan’s Island and encroach upon the enjoyment of the night skies and beaches.
   B.   Design standards.
      (1)   A Principal Building’s exterior site lighting shall be arranged to prevent glare on residential properties.
      (2)   Applications for projects shall submit a lighting plan that will include the following:
         (a)   Site plan with location of all light fixtures and a numerical grid of lighting levels (in foot-candles) that the fixtures will produce on the ground.
         (b)   Area of illumination.
         (c)   Lamp type and wattage.
         (d)   Mounting height of all fixtures.
         (e)   Cut sheet indicating the design and finish of all fixtures.
         (f)   Drawings of all relevant building elevations showing the location and aiming points of the fixtures.
         (g)   Exterior site lighting plans that indicate appropriate provisions have been made to prevent “sky glow”.
      (3)   High pressure sodium lamps or other lamps producing unnatural color shall be prohibited.
      (4)   Streetlight, floodlight, or similar fixtures shall be prohibited.
      (5)   Exterior lighting, other than that attached to the Principal Building, shall not exceed ten (10) feet above the lot grade if located to the side or rear of the Principal Building. A Principal Building’s exterior site lighting shall be designed and arranged to prevent the light source (lens and bulb) from being visible from residential properties.
   C.   Design Review Board. The Design Review Board shall review the lighting plan to ensure that it complies with the above standards and with neighborhood compatibility as described in Article XII.

Sec. 21-63. Pedestrian walkways.

   A.   Design Standard. Newly constructed Principal Buildings shall provide a six (6) foot pedestrian walkway across the front of the Lot parallel to street uninterrupted by the driveway as it crosses the walkway. The pedestrian walkway may be located completely within the public right-of-way or fully or partly within the Front Yard Setback, but shall remain open for public use. An existing walkway meeting the above width standard shall be deemed meeting this requirement.
   B.   Design Review Board. The Design Review Board may grant an appropriate modification in this Design Standard if this or other modifications achieves greater Neighborhood Compatibility as described in Article XII.

Sec. 21-64. Buffers and refuse containers.

   A.   Design Standard. Newly developed non-residential uses shall provide a buffer at the rear of the commercially zoned Lot. The buffer shall be a wall or fence that is completely opaque six (6) feet high.
   B.   Design Standard. Refuse containers for disposal of trash and garbage shall be located to the rear of the building, fenced, gated and blocked from view.

Sec. 21-65. Landscaping.

   The minimum requirement is one street tree for every 35 feet of front footage. The computed required number of trees shall be rounded up at 0.5 or above. The Design Review Committee shall recommend the species and size of street trees permissible. These trees shall be on the property within two feet of the front properly line or preferably, in the right-of-way (if lawful and permitted).

Sec. 21-66. Design Guidelines.

   A.   Dormers are encouraged.
   B.   Porches are encouraged on the front elevation of the building, at least on the first floor, with a minimum eight (8) foot depth and should run at least 50% of the front elevation.
   C.   Building materials should be compatible with the character of the island as decided by the Design Review Board.
   D.   Vegetation on at least one side of walls or fences is encouraged.