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Folly Beach City Zoning Code

CHAPTER

165: DIMENSIONAL STANDARDS

§ 165.01-01 Purpose and Intent.

   The purpose of this section is to present the density and dimensional standards for all principal and accessory uses allowed in this ZDO. These standards may be further modified by other applicable sections of this ZDO. Rules of measurement are set forth in § 165.02, Measurements and Exceptions.
(Ord. 05-10, passed 3-23-10)

§ 165.01-02 Dimensional Standards in the Zoning Districts.

   Unless otherwise specified, all principal and accessory structures in the zoning districts are subject to the dimensional standards set forth in Table 165.01, Dimensional Standards.
TABLE 165.01: DIMENSIONAL STANDARDS (1)
ZONING DISTRICT/USE
LOT AREA
SETBACKS (2)
MAX. HEIGHT (9)
Density
(DU/Sq. Ft.)
Max. Lot Coverage
Min. Lot Area
(Sq. Ft.)
Min. Lot Width
(Ft)
Front
(Ft)
Each Side
(Ft)
Rear
(Ft)
TABLE 165.01: DIMENSIONAL STANDARDS (1)
ZONING DISTRICT/USE
LOT AREA
SETBACKS (2)
MAX. HEIGHT (9)
Density
(DU/Sq. Ft.)
Max. Lot Coverage
Min. Lot Area
(Sq. Ft.)
Min. Lot Width
(Ft)
Front
(Ft)
Each Side
(Ft)
Rear
(Ft)
RESIDENTIAL SINGLE-FAMILY (RSF)
All uses
1/10,500
35% of high ground
10,500 per dwelling
70
10
14.3% of lot width (8)
10
34' above the top of the first living floor surface
RESIDENTIAL TWO-FAMILY (RTF)
All uses
1/5,250 (up to 4 per acre max.)
35% of high ground
10,500
70
10
14.3% of lot width (8)
10
34' above the top of the first living floor surface
RESIDENTIAL MULTI-FAMILY (RMF)
All uses
1/3,500 (up to 12 per acre max.)
35% of high ground
3,500 per multi- family dwelling unit
70
10
5
10
24' above the top of the first living floor surface (4)
MARSH INLAND RESIDENTIAL (MR)
All uses
1/14,500
30% of high ground
14,500
70
25
15
25
34' above the top of the first living floor surface
DOWNTOWN COMMERCIAL (DC)
Single- and two- family uses
1/10,500 (up to 4 per acre max.)
50% of high ground (3)
10,500
35
10
14.3% of lot width (8)
10
34' above the top of the first living floor surface (4)
Outdoor retailers
 
2,625 per outdoor retailer
10
14.3% of lot width (8)
10
40' above the centerli ne of the nearest street (4)
All other uses
N/A
5,250
ISLAND COMMERCIAL (IC)
Single- and two- family uses
1/10,500 (up to 4 per acre max.)
35% (3)
10,500
70
10
10
10
34' above the top of the first living floor surface (4)
 
 
3,500 per unit
All other uses
1/5,250
5,250
10
10
40' above the centerli ne of the nearest public street (4)
MARINE COMMERCIAL (MC)
Single- and two- family uses
1/10,500 (up to 4 per acre max.)
35% (3)
10,500
35
10
5
10
34' above the top of the first living floor surface (4)
All other uses
N/A
35%
(6)
34' above the top of the first living floor surface (4)
CORRIDOR COMMERCIAL (CC)
Single- and two- family uses
1/10,500 (up to 4 per acre max.)
35% (3)
10,500
50
10
5
10
24' above the top of the first living floor surface
Multi-family uses
12
3,500 per unit
All other uses
N/A
35% (3)
5,250
50
None
None required except when abutting RSF, RTF, or RMF; then greater of ½ structure height or 15 feet
34' above the top of the first living floor surface (4)
CONSERVATION (CN)
All uses (7)
N/A
5%
10,500
20
10
10
25
Lesser of one story or 20' above BFE
PLANNED DEVELOPMENT (PD)
See § 163.05
NOTES:
(1)   Uses may also be subject to district-specific standards (Chapter 163), use-specific standards (Chapter 164), or design standards (Chapter 166) that further limit these standards.
(2)   Required setbacks may be increased in accordance with the standards in § 166.04-03, Marsh Buffers, and § 166.04-04, Beach and Dune Management Area (if applicable).
(3)   Single- and two-family structures are subject to maximum floor area ratio limitations in § 166.05-03, Single-and Two-Family Design Standards (as appropriate).
(4)   Multi-family uses are limited to a maximum of two stories (measured from the top of the first living floor surface). Nonresidential uses in the DC and IC Districts are limited to a maximum of three stories. Rooftop decks and parking areas greater than seven feet in height located below the first finished floor shall constitute a story for the purpose of measuring height.
(5)   New development fronting Center Street shall be built to the edge of the street right-of-way, to the maximum extent practicable.
(6)   There is no minimum lot size except where required by SCDES for on-site wastewater facilities.
(7)   There shall also be a setback of 25 feet from the SCDES critical line in the CN district.
(8)   Side setbacks shall be a minimum of five and a maximum of ten feet. Eaves may extend into the required setback up to 18". HVAC platforms may extend into the required setback up to 5' on side of the structure, but cannot be located on both sides.
(9)   Max height shall not exceed height regulated in § 90.05.
 
(Ord. 05-10, passed 3-23-10; Am. Ord. 25-12, passed 3-12-12; Am. Ord. 03-13, passed 4-9-13; Am. Ord. 02-19, passed 4-9-19; Am. Ord. 03-19, passed 4-9-19; Am. Ord. 16-19, passed 4-9-19; Am. Ord. 11-21, passed 5-11-21; Am. Ord. 009-22, passed 6-14-22; Am. Ord. 011-22, passed 9-13-22; Am. Ord. 003-24, passed 4-9-24; Am. Ord. 004-24, passed 4-9-24; Am. Ord. 001-25, passed 2-11-25)

§ 165.02-01 Lots.

   (A)   Definitions/measurement.
      (1)   High ground. The portion of a lot located outside of OCRM critical areas or landward of the SCDES Baseline, wetlands, marsh, and other resource protection areas.
      (2)   Lot area. Lot area means the amount of land area, measured horizontally, included within the lines of a lot. Lands located within any private easements shall be included within the lot area. Public rights-of-way, lands set aside for public utilities, parks, open space including any area seaward of the SCDES baseline or beyond the SCDES critical line, or schools shall not be included in calculating lot area, except where specifically allowed by this ZDO.
      (3)   Lot coverage. The portion of a lot covered by impervious surfaces (including driveways, patios, pools, decks, and similar features).
      (4)   Lot depth. Lot depth means the horizontal distance between the midpoints of straight lines connecting the front lot line and the rear lot line.
      (5)   Lot frontage. Lot frontage means the portion of a lot along a street from which the lot derives its street address. In the case of a building lot abutting upon only one street, the frontage line is the line parallel to and common with the right-of-way. In the case of a corner lot, that part of the building lot having the narrowest frontage on any street shall be considered the frontage line. For the purpose of determining yard requirements on corner lots and through lots, all sides of a lot adjacent to streets shall be considered frontage, and yards shall be provided as required in this ZDO.
      (6)   Lot line. Lot lines mean the lines bounding a lot as established by ownership.
      (7)   Lot width. The distance between straight lines connecting front and rear lot lines at each side of the lot, measured at the front building setback line.
      (8)    Lot types. Lot types mean corner lots, interior lots, through lots, and reversed frontage lots, as depicted in Figure 165.01, Lot Types.
 
         (a)   Corner lot. A lot located at the intersection of two or more streets (other than alleys), regardless of whether or not such streets intersect at right angles. See lots marked "A " in Figure 165.01: Lot Types.
         (b)   Interior lot. A lot other than a corner lot with only one frontage on a street other than an alley. See lots marked "B" in Figure 165.01: Lot Types.
         (c)   Double frontage lot. A lot other than a corner lot with frontage on more than one street other than an alley. Through lots with frontage on two streets may be referred to as "double frontage lots". See lot marked "C" in Figure 165.01: Lot Types.
      (9)   Rear lot line. The rear lot line is the line connecting the two side lot lines along the edge of the lot opposite from the frontage line.
      (10)   Side lot line. The side lot line is the lot line connecting the front and rear lot lines regardless of whether it abuts a right-of-way or another lot line.
   (B)   General lot requirements.
      (1)   Minimum lot dimensions. Any lot that is developed shall meet the minimum lot area, width, and coverage standards established in Table 165.01, Dimensional Standards, for the zoning district in which it is located, except as otherwise established by this ZDO for particular uses.
      (2)   Erection of more than one principal structure on a platted lot. Whenever any land is subdivided, a building permit for the construction of a building or other principal structure (excluding buildings under common ownership or unified control) shall not be issued unless the land is subdivided in accordance with to the procedures and standards of this ZDO.
      (3)   Lots divided by zoning district lines. Whenever a single lot is located within two or more different zoning districts, each portion of that lot shall be subject to all the regulations applicable to the district in which it is located.
(Ord. 05-10, passed 3-23-10; Am. Ord. 05-21, passed 3-10-2021; Am. Ord. 001-25, passed 2-11-25)

§ 165.02-02 Required Yards.

   (A)   Definitions/measurement.
      (1)   Building setback line. The building setback line is a line located at the inside edge of a required front, side, or rear yard. Structures may not encroach over a building setback line except as allowed in this ZDO.
      (2)   Right-of-way. Right-of-way means land dedicated, deeded, used, or to be used for a street, road, alley, pedestrian way, crosswalk, bikeway, drainage facility, or other public uses, wherein the owner gives up rights to the land so long as it is being or will be used for the dedicated purpose. Right-of-way also is a land measurement term, meaning the distance between lot property lines which generally contain not only the street pavement, but also the sidewalk, grass area, and underground or aboveground utilities.
 
      (3)   Yard. A required open area unoccupied and unobstructed by any building or by any structure or portion of a structure except as allowed by this ZDO. Fences, walls, and incidental structures (e.g., flagpoles, birdhouses or feeders, clothesline posts, etc.) may be permitted within a yard in accordance with the standards in § 166.08, Fences and Walls, and § 167.01-04(C)(5), Sight Distance Triangle.
      (4)   Yard, front.
         (a)   General. A yard extending between side lot lines across the front of a lot between the frontage line and the front building setback line. Fences or walls shall be in accordance with the standards in § 166.08, Fences and Walls.
         (b)   Double frontage lots. In the case of double frontage lots, yards areas meeting the standard for a front yard shall be provided on both frontages. Where one of the front yards that would normally be required on a through lot is not in keeping with the prevailing yard pattern, the Zoning Administrator may waive the requirement and substitute a special yard requirement which shall not exceed the average of the yards provided on adjacent lots.
         (c)    Corner lots. In the case of corner lots, a front yard of the required depth shall be provided between the lot frontage line and the front building setback, and a yard equaling half the depth of the required front yard shall be provided on any other frontage.
         (d)   Front yard depth required. Depth of required front yards shall be measured at right angles to a straight line joining the foremost points of the side lot lines. The foremost point of the side lot line, in the case of rounded property corners at street intersections, shall be assumed to be the point at which the side and front lot lines would have met without such rounding. Front and rear lines of a required front yard shall be parallel.
      (5)   Yard, side.
         (a)   Generally. A yard extending from the front building setback line to rear building setback line. In the case of through lots, the side yard extends from the front building setback line to the opposing building setback line associated with the other yard. In the case of corner lots, the yards remaining after full and half-depth front yards have been established shall be considered to be side yards.
         (b)   Side yard width required. Width of required side yards shall be measured at right angles to a straight line joining the ends of front and rear lot lines on the same side of the lot. The inner side yard line of a required side yard shall be parallel to the straight line so established.
      (6)   Yard, rear.
         (a)   Generally. A yard extending across the rear of the lot between the rear lot line and the rear building setback line. In the case of through lots, there will be no rear yard.
         (b)   Rear yard depth required. Depth of required rear yards shall be measured at right angles to a straight line joining the rearmost points of the side lot lines. The rear building setback line shall be parallel to the straight line so established.
   (B)   Yard encroachments. Every part of every required yard shall be open and unobstructed from the ground to the sky except as otherwise permitted in this ZDO.
(Ord. 05-10, passed 3-23-10)

§ 165.02-03 Height.

   (A)   Definition/measurement.
      (1)   Top of the first living floor surface. The surface area of the first floor of habitable conditioned space, and the starting elevation used to determine the maximum height of a structure.
      (2)   Building height. Height of building means the vertical distance measured from the top of the first living floor surface.
      (3)   Exclusions from height limitations. The height limitations included in Table 165.01, Dimensional Standards, do not apply to spires, ventilators, and chimneys; however, the heights of these structures or appurtenances shall not exceed any height limitations prescribed by the Federal Aviation Administration.
(Ord. 05-10, passed 3-23-10; Am. Ord. 03-19, passed 4-9-19; Am. Ord. 11-21, passed 5-11-21)

§ 165.02-04 Bulk.

   (A)   Definition/measurement.
      (1)   Density, gross. Gross density means the number of dwelling units permitted per gross acre of land and is determined by dividing the number of units by the total area of land within the boundaries of a parcel of land including existing streets, dedicated rights-of-way, tree protection zones, and open space set-asides, except as otherwise provided for in this ZDO. In the determination of the number of units to be permitted on a specific parcel of land, a fractional unit equal to or greater than one-half of a unit shall be rounded up to equal a full unit. A fractional unit less than one-half of a unit shall be rounded down, and not counted as a unit.
      (2)   Lot coverage. Lot coverage is a measure of intensity of a use of land that represents the portion of a site that is covered by impervious surfaces. This portion includes, but is not limited to areas covered by structures (including covered decks), parked structures, driveways, streets, sidewalks, and any other areas covered by an impervious surface material, including areas of outdoor storage and swimming pools.
      (3)   Floor area. Floor area means, except as may be otherwise indicated in relation to particular districts and uses, the sum of the gross horizontal areas of the several floors of a building measured from the exterior faces of the exterior walls or from the centerline of walls separating two buildings, excluding attic areas with a headroom of less than seven feet, unenclosed stairs or fire escapes, elevator structures, cooling towers, areas devoted to air conditioning, ventilating or heating or other building machinery and equipment, parking structures and basement space where the ceiling is not more than 48 inches above the general finished and graded level of the adjacent part of the lot.
(Ord. 05-10, passed 3-23-10)