Accessory Structures in Frederick County, VA (2026)
2 rules for unincorporated Frederick County, Virginia.
Verified from official government sources
ADU Rules
In Frederick County outside Winchester, Stephens City and Middletown, one accessory dwelling is allowed with any single-family home if its floor area stays at or below 25% of the primary home's gross floor area or 500 square feet, whichever is larger.
Accessory Dwelling Rules in Frederick County
Some RestrictionsFrederick County Code § 165-706.01
One accessory dwelling shall be allowed with any single-family dwelling as long as the following conditions are met: (1) The floor area of the accessory dwelling shall be no more than 25% of the gross floor area of the primary residential structure on the lot or a minimum of 500 square feet, whichever is greater. (2) In the RP, R4, and R5 Zoning Districts, accessory dwellings shall only be allo...
Shed & Carport Rules
In Frederick County outside Winchester, Stephens City and Middletown, a shed or other accessory structure cannot sit inside the front yard setback of its zoning district. Any accessory building of 500 square feet or more that lands within five feet of a required setback line needs a licensed surveyor to stake its footing before the Building Official approves it. A shed truly accessory to the house needs no separate zoning permit.
Frederick County VA Shed and Accessory Rules
Some RestrictionsFrederick County Code §§ 165-402.03, 165-403.04
No principal structure shall be placed in the front, side, or rear yard setback areas specified by this article. ... No accessory structure shall be placed within the front setback areas of the underlying zoning district as specified by this article. ... A surveyor licensed in the Commonwealth of Virginia shall establish the location of: ... (b) Any accessory structure occupying an area of 500 ...
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