ADU Rules in Arlington, VA — 2026 Guide
Check if your Arlington property qualifies for an ADU in 20 seconds
Arlington ADU Rules at a Glance
Arlington is considered ADU-friendly. Here are the key regulations.
- Arlington County allows ADUs by right on single-family lots since 2023.
- Detached ADUs up to 750 sqft permitted.
- Owner-occupancy required on the primary dwelling or the ADU.
- ADU design must be compatible with the primary structure.
What ReadyPermit Checks for Arlington Properties
Enter any Arlington address and get an instant ADU feasibility analysis covering:
Zoning Compliance
Verify your Arlington lot is zoned for ADU construction under current VA and local rules.
Setbacks & Coverage
Check required setbacks, lot coverage limits, and height restrictions for your specific parcel.
ADU Size Limits
Calculate the maximum ADU square footage allowed based on your lot size and primary dwelling.
Permit Requirements
Understand what permits and approvals Arlington requires before you can break ground.
Flood & Hazard Zones
Identify if your property falls in a flood zone, fire zone, or other hazard overlay.
Lot & Parcel Data
Pull parcel boundaries, lot dimensions, and existing structures from county records.
Check Your Arlington Property Free
Enter your address below. In under 20 seconds you will know if your Arlington lot qualifies for an ADU — no phone calls, no waiting.
No credit card required. Instant results.