Residential (R-3) Zoning08/2022
RESIDENTIAL (R-3)
R-3 District: A residential district intended to accommodate moderate density, suburban residential uses and a limited number
of commercial and institutional uses. To qualify for R-3 zoning, the parcel must consist of a minimum of two (2) acres and be
mapped as Residential Transition, Village, Village Expansion, Urban Expansion, or Urban Development Area in the Montgomery
County Comprehensive Plan.
Single-Family Dwelling: A structure that is arranged or designed to be occupied by one (1) family and includes either
stick-built or modular houses. Manufactured structures (mobile homes/trailers) are not included.
Two-Family Dwelling: A structure having only two (2) dwelling units arranged or designed to be occupied by two (2)
families. A duplex.
Family: By definition, a family consists of one (1) or more people occupying a premise and living in a single-dwelling
unit, as distinguished from an unrelated group occupying a boardinghouse, tourist home, or hotel. A family can include
one (1) or more persons related by blood, marriage, adoption or guardianship, including servants or care givers, and no
more than two roomers or boarders. A family can also consist of up to four (4) unrelated people. Finally, a family can
have up to eight (8) either mentally or develop-mentally disabled persons living in a residential group home facility.
What can I do by right in an R-3 district? (Section 10-26 of the Montgomery County Code)
The R-3 districts are designed to stabilize and protect the essential character of neighborhoods and to promote and encourage
suitable environments for family life. A limited number of commercial and institutional uses are permitted as long as their scale
and character will not create concentrations of traffic, crowds of customers, general outdoor advertising, or other uses that would
conflict with the residential character of the neighborhood. The district is residential in character, while allowing specific compatible
public and semi-public uses.
There are uses that are designated as "by right" which means you do not have to apply for a special use permit. The uses do,
however, have to comply with all approved plans and permits, development standards, and performance Standards included in
the 1999 Montgomery County Zoning Ordinance and with all other applicable regulations. The "by right" uses include:
• Amateur radio tower
• Church
• Data pole
• Dwelling, single-Family
• Dwelling, two-Family
• Home occupation
• Library
• Pet, household
• Public use/Public facility
• Public utility lines, (water, sewer. or other)
• School
• Telecommunications tower, attached
• Urban Agriculture
Accessory structures are also allowed, subject to the requirements of Sec. 10-41 (1).
Temporary family healthcare structures are allowed, subject to the requirements of Sec. 10-41 (2A).
*Subject to the requirements of Sec. 10-41 (19).
What uses require a Special Use Permit?
Some uses are allowed in the R-3 district with the permission of the Board of Supervisors through the Special Use Permit process
(applications available from the Planning Dept.). These include:
• Accessory Structures greater than the principal
structure in height and/or size**
• Amateur radio tower greater than 75 ft.
• Bed and Breakfast Inn
• Boarding house
• Cemetery
• Civic club
• Country club
• Day care center
• Fire, police, and rescue stations
• Funeral home
• Golf course
• Home business
• Manufactured home, Class A & B
• Medical Care Facility
• Nursing Home
• Park and playground, lighted and unlighted
• Park and ride lot
• Public utility plant, other
• Public utility substation
• Short-Term Tourist Rental
• Transition House
**Special use requests reviewed by the Board of Zoning Appeals
08/2022
Building & Lot Requirements
Each zoning district has different lot and building requirements; which are meant to insure the compatibility of new development
with the existing development in the surrounding area.
Minimum Lot Area:
In R-3 districts, lots must be a minimum of 10,000 square
feet, have a minimum width of eighty (80) feet at the setback
line of the front yard, and must have a maximum
length/width ration of five to one (5:1) on lots less than two
(2) acres. (A setback is the distance of a building, structure,
or other defined object from the front lot line or other lot line
as specified.)
Lot Access:
All R-3 lots must be accessed from a road in the Virginia
Department of Transportation (VDOT) road system.
Total Impervious Coverage:
The impervious surface (a surface that does not absorb
water, such as concrete, asphalt, stone, or roofing materials)
cannot cover more than fifty percent (50%) of the lot.
Maximum Building Coverage:
The buildings cannot cover more than thirty percent (30%)
of the lot.
Minimum Yards:
• Front: twenty-five (25) feet
• Side: ten (10) feet (principal structure)
• Rear: twenty-five (25) feet
Accessory Buildings:
Accessory buildings must be a minimum of ten (10) feet from
side or rear lot lines.
Maximum Building Height:
Buildings may not exceed thirty-five (35) feet in height from
the grade, with two exceptions:
• The height limit for dwellings may be increased up
to ten (10) feet, provided that there are two (2)
side yards for each permitted use, each of which is
fifteen (15) feet or more, plus one (1) foot or more
of side yard for each additional foot of building
height over thirty-five (35) feet.
• A public or semipublic building (school, library,
church, hospital) may be erected to a height of sixty
(60) feet from grade, provided that required front,
side, and rear yards shall be increased one (1) foot
or each foot in height over thirty-five (35) feet.
• All accessory buildings must be shorter than the
main structure in height. In addition, accessory
structures within ten (10) feet from the property line
cannot be more than one (1) story in height. Any
accessory structure over eighteen (18) feet in height
requires a special use permit from the Board of
Zoning Appeals. All accessory building must be less
than the main height of the building.
Use Limitations
Public water and wastewater: Public water and wastewater services are required for all development in any R-3 district.
Keeping and raising horses and ponies: Horses and ponies may only be kept for personal enjoyment and not commercial
purposes, a minimum of 5 acres of forestal or open space shall be available for the horses and ponies, and no more than 2
horses and ponies collectively shall be permitted per each 5 acres (a maximum of 4 horses and ponies collectively is allowed
on parcels of 10 acres or more).
Compact Development Option:
Under the compact development option, lots must be a minimum of 5,000 square feet, provided that no less than twenty-five
(25) percent of the gross area of the parent tract is preserved in permanent open space as defined by Montgomery County
Code. The density under this option shall be no more than five (5) dwelling units per acre. The setbacks for R-3 Compact
Development Option are a minimum of ten (10) feet and maximum of twenty-five (25) feet in front, a minimum of ten (10)
feet to the side, and a minimum of twenty-five (25) feet to the rear. Accessory buildings shall not be located less than ten (10)
feet to the side or rear lot line. Open space lots shall not be less than 5,000 square feet in size and may include active or
passive recreational uses, and may be either publicly or privately held.
FOR ADDITIONAL INFORMATION:
Montgomery County Planning & GIS Services
755 Roanoke Street Suite 2A, Christiansburg, VA 24073
CALL 540-394-2148 | EMAIL mcplan@montgomerycountyva.gov
VISIT www.MontgomeryCountyVA.gov/Planning
A zoning permit and/or site plan may be required to proceed with the uses listed on this data sheet. See section 10-53 of the Montgomery County Code, or
call the Planning Department, to determine the required development approvals.
This sheet is intended to only be a guide for development regulations in this zoning district. Please see Chapter 10 of the Montgomery County Code for the
specific regulations. The full texts of the zoning and subdivision ordinances are available at the Planning Department Webpage or at www.municode.com.