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Anne Arundel County Unincorporated
City Zoning Code

TITLE 4

RESIDENTIAL DISTRICTS

§ 18-4-101. Scope.

   This title applies to all residential districts.
(Bill No. 4-05)

§ 18-4-102. Limitation on the number of dwellings on a lot.

   Except as provided otherwise in this Code, there may be only one single-family detached dwelling on a lot.
(Bill No. 4-05; Bill No. 78-05)

§ 18-4-103. Limitations on mobile homes.

   A mobile home may not be stored on land or occupied for dwelling purposes unless located in a mobile home park licensed under § 11-9-103 of this Code or on a manufactured home space licensed under § 11-9-104 of this Code.
(Bill No. 4-05; Bill No. 57-20)

§ 18-4-104. Pets; livestock or fowl.

   (a)   Definitions. For purposes of this section, “miniature pig” means a type of swine that is less than 22 inches tall at the shoulder when fully grown, including a pot-bellied pig and is spayed or neutered.
   (b)   Pets. The keeping of pets for other than commercial purposes is allowed.
      (1)   The keeping of cats is limited to no more than nine per household.
      (2)   The keeping of dogs shall be in accordance with the following schedule:
 
Number of Dogs
Minimum Lot Size
1 to 4
No requirement
5 to 6
25,000 square feet
7 or more
40,000 square feet, plus 5,000 square feet for each additional dog above 7
 
      (3)   The keeping of miniature pigs as pets shall be in accordance with the following schedule:
 
Number of Miniature Pigs
Minimum Lot Size
1 – 2
47,500 square feet
 
      (4)   Miniature pigs shall be kept within a fenced area.
   (c)   Livestock or fowl. The keeping of livestock or domestic fowl is allowed in accordance with the following:
      (1)   Livestock may be kept on a lot of 40,000 square feet or greater and may not exceed a ratio of one animal unit per 40,000 square feet. An animal unit is defined as follows:
2 horses or mules
= 1 animal unit
2 head of cattle
= 1 animal unit
4 ponies, burros, miniature horses, or donkeys
= 1 animal unit
10 sheep or goats
= 1 animal unit
8 swine
= 1 animal unit
8 llamas
= 1 animal unit
8 alpacas
= 1 animal unit
Other animals, 2,000 pounds
= 1 animal unit
 
      (2)   Domestic fowl may be kept on a lot 40,000 square feet or greater and may not exceed a ratio of one bird unit per 40,000 square feet. A bird unit for lots 40,000 square feet or greater is defined as follows:
 
32 chickens
= 1 bird unit
16 ducks
= 1 bird unit
8 turkeys
= 1 bird unit
8 geese
= 1 bird unit
1 ostrich
= 1 bird unit
2 emus
= 1 bird unit
Other fowl, 100 pounds
= 1 bird unit
 
      (3)   Chickens and ducks may be kept on a lot of 20,000 square feet or greater improved by a single family dwelling and may not exceed a ratio of one bird unit per 20,000 square feet. A bird unit for lots 20,000 square feet or greater but less than 40,000 square feet is defined as follows:
 
8 chickens – hens only
= 1 bird unit
4 ducks
= 1 bird unit
 
      (4)   Chickens, not including roosters, may be kept on a lot of less than 20,000 square feet improved by a single family dwelling in accordance with the following schedule:
 
Minimum Lot Size
Maximum Number of Chickens
10,000 square feet
   4
15,000 square feet
   6
 
      (5)   Combinations of animals are allowed if the lot is 40,000 square feet or greater and the allowed ratio of animal units to square footage is maintained.
      (6)   All livestock and fowl shall be kept within a fenced area. Chickens or ducks on lots less than 40,000 square feet shall be kept in a secured enclosure with a chicken coop.
      (7)   Except for coops or enclosures for chickens or ducks on lots less than 40,000 square feet, accessory structures relating to livestock or fowl and manure storage shall be located at least 50 feet from side and rear lot lines.
      (8)   Coops and enclosures for chickens or ducks on lots less than 40,000 square feet shall be located at least 25 feet from side or rear lot lines and five feet from an onsite dwelling.
(Bill No. 4-05; Bill No. 69-07; Bill No. 79-13; Bill No. 85-17; Bill No. 70-18; Bill No. 73-20; Bill No. 6-25)

§ 18-4-105. Noncommercial antennas.

   A noncommercial antenna structure in a residential district shall comply with the following:
      (1)   the height of the structure may not exceed the lesser of 100 feet or the width or depth of the property as determined by a line bisecting the structure and measured from one side of the lot line to the other or from the front lot line to the rear lot line at the shortest distance between the two lines;
      (2)   the setback for the central vertical portion of the antenna structure shall be at least 10 feet from each lot line for a structure up to 35 feet high and 10 feet plus one additional foot for each three feet in excess of 35 feet for a structure over 35 feet high; and
      (3)   each rigid radiating element of the structure shall be set back at least 10 feet from any lot line.
(Bill No. 4-05)

§ 18-4-106. Permitted, conditional, and special exception uses.

   The permitted, conditional, and special exception uses allowed in each of the residential districts are listed in the chart in this section using the following key: P = permitted use; C = conditional use; SE = special exception use. A blank means that the use is not allowed in the district. Except as provided otherwise in this article, uses and structures customarily accessory to the listed uses also are allowed, except that guest houses as accessory structures are prohibited and outside storage as an accessory use is limited to the lesser of 10% of the allowed lot coverage or 500 square feet.
Permitted, Conditional, and Special Exception Uses
RA
RLD
R1
R2
R5
R10
R15
R22
Permitted, Conditional, and Special Exception Uses
RA
RLD
R1
R2
R5
R10
R15
R22
Agritourism
C
C
C
Airports and airfields
SE
SE
Alcoholic beverage uses as accessory to other uses
C
C
C
C
C
C
C
C
Animal hospitals and veterinary clinics
SE
SE
SE
Assisted living facilities
SE
SE
SE
SE
SE
SE
SE
Assisted living facilities I, community-based
P
P
P
P
P
P
P
P
Assisted living facilities II, community-based
C
C
C
C
C
C
C
C
Bed and breakfast homes
C
C
C
C
Bed and breakfast inns
SE
SE
SE
SE
Bird sanctuaries
C
C
Business complexes
C
Camps, private, for seasonal residence only
P
P
Campgrounds, commercial recreational
SE
SE
SE
Carnivals, circuses, and fairs, temporary
C
C
C
C
C
C
C
C
Cemeteries
SE
SE
SE
Child care centers other than as a home occupation
SE
SE
SE
SE
SE
SE
SE
SE
Christmas tree sales
P
P
P
P
Clay and borrow pits or sand and gravel operations
SE
Commercial recreational facilities, including miniature golf; driving ranges; tennis, racquet, and handball barns or courts; artificial ski slopes; indoor soccer; bowling alleys; BMX bike, skateboard or roller blade parks; and skating rinks
SE
SE
Commercial telecommunication facilities permanently located on the ground
SE
SE
SE
SE
SE
SE
SE
SE
Commercial telecommunication facilities permanently located on the ground on land owned by a governmental entity or a volunteer fire company or located in a transmission right- of-way and not attached to a transmission line pole or tower or within 100 feet of a transmission line right-of-way
C
C
C
C
C
C
C
C
Commercial telecommunication facilities that are antennas attached to a nonresidential structure if the antenna does not exceed 15 feet in height above the structure, does not project more than two feet beyond the facade, and does not support lights or signs unless required for safety reasons
P
P
P
P
P
P
P
P
Commercial telecommunication facilities for testing purposes or emergency services for a period not exceeding 30 days if the facility is a monopole not exceeding 100 feet in height and is located at least 300 feet from any dwelling
P
P
P
P
P
P
P
P
Composting facilities
C
Conference retreat facilities
SE
SE
SE
Construction or sales trailers, temporary, in an approved development actively under construction
P
P
P
P
P
P
P
P
Conversion of existing single-family detached dwellings to duplex dwellings
SE
SE
Country clubs, private clubs, and service, nonprofit, charitable organizations with less than 125 onsite parking spaces
C
C
C
C
C
C
C
C
Country clubs, private clubs, and service, nonprofit, and charitable organizations with 125 or more onsite parking spaces
SE
C
C
C
C
C
C
C
Dwelling units, accessory
C
C
C
C
C
C
C
Dwelling unit, abutting heavy industrial zone
P
P
Dwellings, duplex
C
C
C
C
C
Dwellings, fourplex
C
C
C
C
C
Dwellings, multifamily
C
C
C
P
P
P
Dwellings, multiplex
C
C
C
C
Dwellings, single-family detached
P
P
P
P
P
P
P
Dwellings, townhouses and stacked townhouses
C
C
C
C
C
C
Dwellings, triplex
C
C
C
C
C
Eating disorder treatment facility
SE
Farm alcohol production facility
C
C
C
Farm dual uses
C
C
Farm or agricultural heritage site special event, 9 to 15 annual events
C
C
C
Farm or agricultural heritage site special event, 16 to 30 annual events
SE
SE
SE
Farm or agricultural heritage site stay
C
C
C
Farm tenant houses
C
C
C
C
Farming
P
P
P
P
P
P
P
P
Festival, renaissance
SE
Garden center
C
C
C
C
Golf courses
P
P
P
P
P
P
P
P
Golf course facilities, private
C
C
C
C
C
C
C
C
Government reuse facilities (see Title 12)
C
Group homes I
P
P
P
P
P
P
P
P
Group homes II
C
C
C
C
C
C
C
C
Heliports
SE
SE
SE
Home occupations
C
C
C
C
C
C
C
C
Hospice facilities
P
P
P
P
P
P
P
P
Housing for the elderly of moderate means
C
C
C
C
C
Kennels, commercial
SE
SE
SE
Landscaping and tree contracting
SE
SE
Landscaping and tree contracting with accessory recycling of logs into firewood
SE
Libraries, museums, parks, and similar uses of a noncommercial nature that are located on a lot with an historic structure or activity
P
P
P
P
P
P
P
P
Licensed grower of cannabis, as defined in State law and regulation
C
Licensed processor of cannabis, as defined in State law and regulation
C
Mobile home outside of a mobile home park on a contiguous lot of at least 60 acres
P
Mobile home parks
SE
SE
SE
SE
SE
SE
SE
Nurseries with landscaping and plant sales
C
C
C
C
Nursing homes
SE
SE
SE
SE
SE
SE
SE
SE
Piers and launching ramps, community
SE
SE
SE
SE
SE
SE
SE
SE
Piers, recreational
C
C
C
C
C
C
C
C
Piers, private residential, if accessory to a dwelling unit
P
P
P
P
P
P
P
P
Planned unit developments (see Title 12)
SE
SE
SE
SE
SE
SE
SE
SE
Produce markets
C
C
C
C
Public utility essential services
P
P
P
P
P
P
P
P
Public utility uses
SE
SE
SE
SE
SE
SE
SE
SE
Recovery residences
P
P
P
P
P
P
P
P
Religious facilities on a lot of at least two acres with less than 300 onsite parking spaces
P
P
P
P
P
P
P
Religious facilities on a lot of at least two acres with 300 or more onsite parking spaces
SE
P
P
P
P
P
P
Religious facilities on a lot of at least 5 acres if the coverage for all buildings, including onsite parking, is not more than 30% of the lot
P
Religious facilities, existing, with less than 300 onsite parking spaces that abut and have direct access to a collector or higher classification road
P
P
P
P
P
P
P
P
Restaurants, taverns, retail sales, and consumer services in a multifamily structure
C
C
Rifle, pistol, skeet, or archery ranges
SE
SE
Roadside stands consisting of temporary seasonal structures that sell produce and other agricultural goods
P
P
P
P
Rooming houses
C
C
P
Schools, private academic, in existence on or before May 12, 2005
P
P
P
P
P
P
P
P
Schools, public charter and private academic, with less than 125 onsite parking spaces
C
C
C
C
C
C
P
P
Schools, public charter and private academic, with 125 or more onsite parking spaces
SE
C
C
C
C
C
P
P
Small cell system
C
C
C
C
C
C
C
C
Small wind energy systems or meteorological towers on a lot of at least three acres
C
C
C
C
C
One small wind energy system or meteorological tower on a lot less than three acres
SE
SE
SE
SE
SE
Solar energy generating facility – accessory
P
P
P
P
P
P
P
P
Solar energy generating facility – community
SE
Solar energy generating facility – utility scale
SE
Stables, commercial or community, and riding clubs
C
C
C
Staging areas for County capital projects
P
P
P
P
P
P
P
P
Storage, bulk for agricultural products
SE
Swimming pools and recreational facilities, community, if located at least 50 feet from each residential lot line or dwelling unit
P
P
P
P
P
P
P
P
Swimming pools, private
P
P
P
P
P
P
P
P
Taxidermists, excluding butchering, rendering, or tanning
P
Theaters, live performances, temporary outdoor
P
P
P
Veterinarian clinic, large animal
C
Volunteer fire stations
P
P
P
P
P
P
P
P
Waterman's commercial use in existence as of January 1, 1990
P
P
P
P
p
Waterman's home commercial use
C
C
C
C
C
Wildlife and game preserves
P
P
Workforce housing
C
C
C
 
(Bill No. 4-05; Bill No. 54-05; Bill No. 55-05; Bill No. 78-05; Bill No. 69-07; Bill No. 77-07; Bill No. 79-07; Bill. No. 97-08; Bill No. 2-09; Bill No. 45-09; Bill No. 39-10; Bill No. 10-11; Bill No. 13-11; Bill No. 14-11; Bill No. 56-11; Bill No. 73-11; Bill No. 68-13; Bill No. 21-14; Bill No. 82-14; Bill No. 8-15; Bill No. 23-15; Bill No. 72-15; Bill No. 96-15; Bill No. 28-16; Bill No. 30-16; Bill No. 75-16; Bill No. 83-16; Bill No. 96-16; Bill No. 67-17; Bill No. 67-18; Bill No. 89-18; Bill No. 14-19; Bill No. 54-19; Bill No. 76-19; Bill No. 97-19; Bill No. 6-20; Bill No. 16-20; Bill No. 57-20; Bill No. 68-20; Bill No. 69-20; Bill No. 2-21; Bill No. 21-21; Bill No. 33-22; Bill No. 15-23; Bill No. 56-23; Bill No. 61-23; Bill No. 62-23; Bill No. 77-23; Bill No. 17-24; Bill No. 63-24; Bill No. 72-24; Bill No. 29-25)

§ 18-4-201. Scope.

   This subtitle:
      (1)   does not affect the validity and operation of lot consolidation agreements executed before September 25, 2003, and the merger of lots under the lot consolidation agreements shall remain in full force and effect;
      (2)   does not affect the validity and operation of record plats used to combine lots under the predecessor provisions to what is now § 18-4-202;
      (3)   does not restrict the right of an owner of contiguous lots to subdivide the lots under Article 17 of this Code;
      (4)   does not apply to the use of contiguous lots for purposes of water, sewer, or stormwater management; and
      (5)   does not apply to contiguous lots used pursuant to § 18-2-204(c)(3).
(Bill No. 4-05; Bill No. 4-18)

§ 18-4-202. Uses and merger of unimproved lots of substandard area or dimensions.

   (a)   Definition. For purposes of this section, “unimproved lot” means a lot on which no part of a principal use is located.
   (b)   When dwelling on substandard lot generally permitted or prohibited. A dwelling may be constructed on a lot that does not comply with the minimum area or dimensional requirements of the zoning district in which the lot is located if the lot complied with any applicable minimum area and dimensional requirements at the time it was created, except that in the absence of compliance with subsection (c), a dwelling may not be constructed if the lot was contiguous to and under the same ownership as one or more unimproved lots on January 1, 1987, unless the lot or combination of lots is a minimum of 20,000 square feet and is being developed for one single family-detached dwelling.
   (c)   Exception to general prohibition. A dwelling may be constructed on a lot that was contiguous to and under the same ownership as one or more unimproved lots on January 1, 1987 if (1) the lot is served by public water and sewer or (2) the lot is merged with the contiguous unimproved lot or lots to create a lot that complies with or comes as close as possible to complying with the minimum area requirements of the zoning district in which the lot is located and the owner executes and records a lot merger agreement as a condition precedent to receiving a building permit for the dwelling.
(Bill No. 4-05; Bill No. 21-25)

§ 18-4-203. Merger of lots in service of a principal use.

   (a)   General prohibition against use of multiple lots to serve principal use. On and after September 25, 2003, multiple lots under the same ownership may not be used for the purpose of serving a principal use or be merged for the purpose of serving a principal use unless the requirements of this section are met. Contiguous lots under the same ownership may be used for the purpose of serving a principal use without being merged if the principal use is a religious facility with less than 300 onsite parking spaces that abuts and has direct access to a collector or higher classification road.
   (b)   Merger by operation of law. Contiguous lots under the same ownership that are separated by a boundary line upon or across which a principal use is located on or after September 25, 2003, merge by operation of law on that date, and the Office of Planning and Zoning thereafter shall require the owner of the merged lots to execute and record a lot merger agreement as a condition precedent to receiving a permit for demolition, development, grading, or construction activity.
   (c)   Merger by agreement. Contiguous lots shall be merged by the owner of the lots for the purpose of serving a principal use, and the owner shall execute and record a lot merger agreement as a condition precedent to receiving a permit that requires use of the lots in service of a principal use.
   (d)   Unmerger. Some or all of lots merged under subsections (b) or (c), or under a lot consolidation agreement executed and recorded before September 25, 2003, may be unmerged if:
      (1)   the lots no longer are used in service of a principal use;
      (2)   the lots comply with the minimum area and dimensional requirements of the zoning district in which the lots are located in effect at the time of the unmerger;
      (3)   all or part of any lots in the critical area were part of a subdivision approved on or after August 22, 1988; and
      (4)   the owner executes and records in the land records of the County at the owner's expense an instrument unmerging the lots in the form required by the Office of Planning and Zoning.
   (e)   Accessory uses or structures. Subsection (d)(1) shall not be construed to prohibit the Office of Planning and Zoning from allowing an accessory use or structure to remain on a lot even if that use or structure would become unlawful after the unmerger if:
      (1)   necessary to avoid an unnecessary hardship, such as the removal of a proposed shared garage or joint use pier;
      (2)   the accessory structure is approved pursuant to § 18-2-204(c)(3) and the construction of a principal use on the lot does not require removal of the existing accessory structure to meet the requirements of this article without the need for a variance; and
      (3)   the conditions for allowing the use or structure to remain are specified in the instrument described in subsection (d)(4).
(Bill No. 4-05; Bill No. 64-17; Bill No. 67-18)

§ 18-4-204. Lot merger agreement; effect of merger.

   (a)   Requirements. A lot merger agreement shall:
      (1)   be in the form required by the Office of Planning and Zoning and signed by the County and the owner of the lots;
      (2)   be recorded by the owner in the land records of Anne Arundel County at the owner's expense and bind the subsequent owners of the lots; and
      (3)   not affect the legal description of or title to the lots.
   (b)   Effective date. Except as provided in § 18-4-203(b), a merger of lots shall take effect on the date specified in the lot merger agreement.
   (c)   Effect of merger. Except as otherwise provided in this subtitle, lots merged under this subtitle shall be treated as a single lot for purposes of this article.
(Bill No. 4-05)

§ 18-4-205. Information upon application for permit; enforcement.

   (a)   Information. The owner of a lot shall submit the information required by the Office of Planning and Zoning concerning the ownership of contiguous lots upon application for:
      (1)   a building permit for a dwelling on the lot that does not comply with the minimum area or dimensional requirements of the zoning district in which the lot is located in effect at the time the application is submitted; or
      (2)   a permit that requires use of one or more of the contiguous lots in service of a principal use.
   (b)   Enforcement action. The Office of Planning and Zoning may require an owner who failed to execute and record a lot merger agreement as required by this subtitle to execute a lot merger agreement as a condition of resolving an enforcement action under Title 17.
(Bill No. 4-05)

§ 18-4-206. Consolidation without subdivision.

   Nothing in this subtitle shall be construed to authorize merger of a lot any part of which is within a platted and recorded road or right-of-way.
(Bill No. 60-10)

§ 18-4-301. Bulk regulations.

   Except as provided otherwise in this article, the following bulk regulations are applicable in an RA District:
Minimum lot size
40,000 square feet
Maximum coverage by structures
25% of gross area
Minimum width at front building restriction line; for waterfront lots the building restriction line is measured from the rear lot line
150 feet
Minimum setbacks for principal structures:
   Front lot line
40 feet
   Rear lot line
35 feet
   Side lot line
15 feet
   Combined side lot lines
40 feet
   Corner side lot line
40 feet
P   rincipal arterial or higher classification road
50 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Front lot line
50 feet
   Side and rear lot lines
15 feet or, for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities accessory to single-family detached, duplex, or semi-detached dwellings), 10 feet
   Corner side lot line
40 feet
Maximum height limitations:
   Principal structures
45 feet
   Accessory structures
45 feet if all setbacks are increased by one foot for each foot of height in excess of 25 feet
   Maximum density
One dwelling unit per 20 acres plus one additional dwelling unit for residue acreage that exceeds 10 acres and, for sites over 50 acres, one additional dwelling unit for every 50 acres and one additional dwelling unit for residue acreage that exceeds 25 acres
Cluster development:
   Minimum lot size
20,000 square feet
   Maximum lot size
120,000 square feet
   Minimum width at front building restriction line
80 feet
   Minimum setbacks for principal structures:
      Front lot line
5 feet, but if parking is located in the front yard, 18 feet
      Rear lot line
15 feet
      Side lot lines
10 feet
      Boundary line of the cluster development site
40 feet from adjacent residentially zoned and developed property, except that the setback may be reduced by the Planning and Zoning Officer to preserve environmental features and the setback may be reduced to 25 feet if the adjoining lot is an open space lot or an open area lot created under § 17-6-111 of this Code
   Minimum setbacks from side and rear lot lines for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height
10 feet or, for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities accessory to single-family detached, duplex, or semi-detached dwellings), 5 feet
 
(Bill No. 4-05; Bill No. 78-05; Bill No. 60-10; Bill No. 93-12; Bill No. 72-24)

§ 18-4-401. Bulk regulations.

   (a)   Generally.
      (1)   Except as provided otherwise in this article, the following bulk regulations are applicable in an RLD District:
Minimum lot size
40,000 square feet
Maximum coverage by structures
25% of gross area
Minimum width at front building restriction line; for waterfront lots the building restriction line is measured from the rear lot line
150 feet
Minimum setbacks for principal structures:
   Front lot line
50 feet
   Rear lot line
40 feet
   Side lot line
20 feet
   Combined side lot lines
50 feet
   Corner side lot line
40 feet
   Principal arterial road
75 feet
   Freeway
150 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Front lot line
60 feet
   Side and rear lot lines
20 feet or, for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities accessory to single-family detached, duplex, or semi-detached dwellings), 10 feet
   Corner side lot line
50 feet
Maximum height limitations:
   Principal structures
45 feet
   Accessory structures
45 feet if all setbacks are increased by one foot for each foot of height in excess of 25 feet
   Maximum density
One dwelling unit per five acres
Cluster development:
   Minimum setbacks for principal structures:
      Front lot line
5 feet, but if parking is located in the front yard, 18 feet
      Rear lot line
15 feet
      Side lot lines
10 feet
      Boundary line of the cluster development site
40 feet from adjacent residentially zoned and developed property, except that the setback may be reduced by the Planning and Zoning Officer to preserve environmental features and the setback may be reduced to 25 feet if the adjoining lot is an open space lot or an open area lot created under § 17-6-111 of this Code
   Minimum setbacks from side and rear lot lines for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height
10 feet or, for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities accessory to single-family detached, duplex, or semi-detached dwellings), 5 feet
 
      (2)   A lot with an area of less than 40,000 square feet that was approved by a record plat prior to April 9, 1987, may be reviewed in accordance with the bulk regulations of § 18-4-601 and lot size is subject to § 18-4-202.
   (b)   Setback from certain slopes. A 50-foot planted buffer area shall be located and maintained between the principal structure and the crest of steep slopes.
(Bill No. 4-05; Bill No. 78-05; Bill No. 60-10; Bill No. 93-12; Bill No. 72-24)

§ 18-4-501. Bulk regulations.

   Except as provided otherwise in this article, the following bulk regulations are applicable in an R1 District:
Minimum lot size
30,000 square feet; or 15,000 for side by side duplex
Maximum coverage by structures
50% of gross area
Minimum width at front building restriction line; for waterfront lots the building restriction line is measured from the rear lot line
80 feet
Minimum width at front building restriction line for duplex if located on more than one lot; for waterfront lots the building restriction line is measured from the rear lot line
40 feet
Minimum setbacks for principal structures:
   Front lot line
35 feet
   Rear lot line
30 feet
   Side lot line
15 feet
   Side lot line for duplex dwellings on separate lots
0 foot shared lot line, 15 feet side lot line
   Corner side lot line
35 feet for single family detached; or 25 feet for duplex
   Principal arterial or higher classification road
50 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Front lot line
50 feet
   Side and rear lot lines
15 feet or 10 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
   Corner side lot line
35 feet for single family detached; or 25 feet for duplex
Maximum height limitations:
   Principal structures
45 feet
   Accessory structures
45 feet if all setbacks are increased by one foot for each foot of height in excess of 25 feet
Maximum density
One dwelling unit per 40, 000 square feet
Maximum density for adult independent dwelling units served by public sewer and located within a two-mile radius of an assisted living facility or a County owned and operated library or community center
Three dwelling units per acre
Cluster development:
   Minimum lot size
None, except for adult independent dwelling unit developments served by public sewer with a minimum net area of 50 acres, each of which units shall be on a lot not less than 10,000 square feet
   Maximum individual lot coverage by structures
Determined by setbacks and constraints imposed by characteristics of lot, coverage not to exceed 50%
   Minimum width at front building restriction line
80 feet or, for adult independent dwelling unit developments served by public sewer with a minimum net area of 50 acres, 60 feet
   Minimum setbacks for principal structures:
      Front lot line
5 feet, but if parking is located in the front yard, 18 feet
      Rear lot line
10 feet
      Side lot lines
7 feet
      Boundary line of the cluster development site
40 feet from adjacent residentially zoned and developed property, except that the setback may be reduced by the Planning and Zoning Officer to preserve environmental features and the setback may be reduced to 25 feet if the adjoining lot is an open space lot or an open area lot created under 17-6-111of this Code
   Minimum setbacks from side and rear lot lines for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
 
(Bill No. 4-05; Bill No. 78-05; Bill No. 60-10; Bill No. 93-12; Bill No. 63-22; Bill No. 72-24)

§ 18-4-601. Bulk regulations.

   Except as provided otherwise in this article, the following bulk regulations are applicable in an R2 District:
Minimum lot size:
   If not served by public sewer
20,000 square feet
   If served by public sewer
10,000 square feet
   Duplex and fourplex dwellings on separate lots
5,000 square feet
Maximum coverage by structures
60% of gross area
Minimum width at front building restriction line; for waterfront lots the building restriction line is measured from the rear lot line
70 feet
Minimum width at front building restriction line for duplex if located on more than one lot; for waterfront lots, the building restriction line is measured from the rear lot line
35 feet
Minimum setbacks for principal structures:
   Front lot line
25 feet
   Rear lot line
20 feet
   Side lot line
7 feet
   Side lot line for duplex dwellings on separate lots
0 foot shared lot line, 7 feet side lot line
   Corner side lot line
20 feet
   Principal arterial or higher classification road
40 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Front lot line
40 feet
   Side and rear lot lines
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
   Corner side lot line
50 feet
Maximum height limitations:
   Principal structures
35 feet
   Accessory structures
25 feet or the height of the principal structure, whichever is less
Maximum density:
   If not served by public sewer
One dwelling unit per 20,000 square feet
   If served by public sewer
2.5 dwelling units per acre
Maximum density for adult independent dwelling units served by public sewer and located within a two-mile radius of an assisted living facility or a County owned and operated library or community center
Five dwelling units per acre
Cluster development:
   Maximum individual lot coverage by structures
Determined by setbacks and constraints imposed by characteristics of lot, coverage not to exceed 60%
   Minimum width at front building restriction line
50 feet
   Minimum setbacks for principal structures:
      Front lot line
5 feet, but if parking is located in the front yard, 18 feet
      Rear lot line
10 feet
      Side lot lines
7 feet
      Boundary line of the cluster development site
40 feet from adjacent residentially zoned and developed property, except that the setback may be reduced by the Planning and Zoning Officer to preserve environmental features and the setback may be reduced to 25 feet if the adjoining lot is an open space or an open area lot created under § 17-6-111 of this Code
   Minimum setbacks from side and rear lot lines for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
 
(Bill No. 4-05; Bill No. 78-05; Bill No. 60-10; Bill No. 93-12; Bill No. 63-22; Bill No. 72-24)

§ 18-4-701. Bulk regulations.

   Except as provided otherwise in this article, the following bulk regulations are applicable in an R5 District:
Minimum lot size:
   If not served by public sewer
10,000 square feet
   If served by public sewer
5,000 square feet
Maximum coverage by structures
65% of gross area
Minimum width at front building restriction line; for waterfront lots the building restriction line is measured from the rear lot line
50 feet
Minimum width at front building restriction line for duplex if located on more than one lot; for waterfront lots, the building restriction line is measured from the rear lot line
25 feet
Minimum setbacks for principal structures:
   Front lot line
20 feet
   Rear lot line
15 feet
   Side lot lines
7 feet
   Side lot line for duplex dwellings on separate lots
0 foot shared lot line, 7 feet side lot line
   Corner side lot line
15 feet
   Principal arterial or higher classification road
35 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Front lot line
40 feet
   Side and rear lot lines
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
   Corner side lot line
15 feet
Maximum height limitations:
   Principal structures
50 feet
   Multifamily and multiplex dwellings
50 feet
   Accessory structures
25 feet or the height of the principal structure, whichever is less
Maximum density
Five dwelling units per acre
Maximum density for adult independent dwelling units served by public sewer and located within a two-mile radius of an assisted living facility or a County owned and operated library or community center
Six dwelling units per acre
Cluster development:
   Maximum individual lot coverage by structures
Determined by setbacks and constraints imposed by characteristics of lot, coverage not to exceed 75%
   Minimum width at front building restriction line
40 feet
   Minimum setbacks for principal structures:
      Front lot line
5 feet, but if parking is located in the front yard, 18 feet
      Rear lot line
10 feet
      Side lot lines
7 feet
      Boundary line of the cluster development site
40 feet from adjacent residentially zoned and developed property, except that the setback may be reduced by the Planning and Zoning Officer to preserve environmental features and the setback may be reduced to 25 feet if the adjoining lot is an open space lot or an open area lot created under 17-6-111 of this Code
   Minimum setbacks from side and rear lot lines for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
 
(Bill No. 4-05; Bill No. 78-05; Bill No. 60-10; Bill No. 93-12; Bill No. 14-21; Bill No. 63-22; Bill No. 72-24)

§ 18-4-801. Bulk regulations.

   (a)   Generally. Except as provided otherwise in this article, the following bulk regulations are applicable in an R10 District:
Minimum lot size
None
Maximum coverage by structures
75% of gross area
Minimum setbacks for principal structures:
   Front lot line for structures and a rear or side facade abutting a roadway:
      Arterial road or higher classification
35 feet
      Collector road or lower classification
20 feet
   Private access drives and parking courts
10 feet
   All other lot lines
15 feet
   Distance between opposing front facades
30 feet
   Single family detached, duplex, triplex, fourplex, and multiplex dwellings:
      Front lot line
20 feet
      Side lot line for duplex dwellings on separate lots
0 foot shared lot line, 7 feet side lot line
      Corner side lot line
15 feet
      Rear lot line
15 feet
   Multifamily dwelling structures:
      Minimum distance between multifamily structures located on the same lot (closest projecting edge):
         Facades with windows
30 feet
         Windowless facades
15 feet
      Rear lot line
15 feet
      Side lot line
10 feet
      Corner side lot line
15 feet
Minimum setbacks from road for garage or carport
18 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Front lot line
40 feet
   Side and rear lot lines
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
   Corner side lot line
15 feet
Maximum height limitations:
   Multifamily structures
75 feet
   Multiplex dwellings
50 feet
   Single family detached, duplex, triplex, and fourplex dwellings
50 feet
   Accessory structures
20 feet or the height of the principal structure, whichever is less
Maximum density
10 dwelling units per acre
 
   (b)   Exception. A single-family detached dwelling on a lot in a recorded subdivision shall comply with the bulk regulations of the R5 District.
(Bill No. 4-05; Bill No. 78-05; Bill No. 69-07; Bill No. 72-24)

§ 18-4-901. Bulk regulations.

   (a)   Generally. Except as provided otherwise in this article, the following bulk regulations are applicable in an R15 District:
Maximum coverage by structures
75% of gross area
Minimum setbacks for principal structures:
   Front lot line
20 feet
   Side lot line
15 feet
   Side lot line for duplex dwellings on separate lots
0 foot shared lot line, 7 feet side lot line
   Corner side lot lines
20 feet
   Rear lot line
20 feet
Minimum distance between multifamily structures located on the same lot (closest projecting edge):
   Facades with windows
30 feet
   Facades that are windowless
15 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Side and rear lot lines
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
   Corner side lot line
15 feet
Maximum height limitations:
   Multifamily structures
90 feet
   Multiplex dwellings
50 feet
   Single family detached, duplex, triplex, and fourplex dwellings
50 feet
   Accessory structures
20 feet or the height of the principal structure, whichever is less
Maximum length of a single elevation unless special architectural, landscaping, or topographic treatment, such as a change of material, texture, depression, berm, or other similar change, is used
250 feet
Maximum density
15 dwelling units per acre
 
   (b)   Exception. A single-family detached dwelling on a lot in a recorded subdivision shall comply with the bulk regulations of the R5 District.
(Bill No. 4-05; Bill No. 78-05; Bill No. 69-07; Bill No. 72-24)

§ 18-4-1001. Bulk regulations.

   Except as provided otherwise in this article, the following bulk regulations are applicable in an R22 District:
Maximum coverage by structures
75% of gross area
Minimum setbacks for principal structures:
   Front lot line
20 feet
   Side lot line
25 feet
   Corner side lot line
30 feet
   Rear lot line
30 feet
Minimum distance between multifamily structures located on the same lot (closest projecting edge):
   Facades with windows
30 feet
   Facades without windows
15 feet
Minimum setbacks for accessory structures other than sheds that do not exceed 64 square feet in area and eight feet in height:
   Side and rear lot lines
7 feet or 5 feet for structures less than 8 feet in height (other than swimming pools, tennis courts, basketball courts, and similar private recreational facilities)
   Corner side lot line
15 feet
Maximum height limitations:
   Multifamily structures
None if all setbacks are increased by one foot for each two feet of height in excess of 150 feet
   Multiplex dwellings
50 feet
   Single family detached, duplex, triplex, and fourplex dwellings
50 feet
   Accessory structures
20 feet or the height of the principal structure, whichever is less
Maximum density
22 dwelling units per acre
 
(Bill No. 4-05; Bill No. 78-05; Bill No. 72-24)