Guides
ADU guides for Northern Virginia
Practical, local guidance on planning, permitting, and paying for an ADU in Fairfax County and the greater Northern Virginia area.
How Much Does an ADU Cost in Northern Virginia? A Realistic 2026 Breakdown
Detached, attached, garage, and basement ADUs in Northern Virginia typically run $60K to $250K. A real 2026 cost breakdown, the hidden costs most quotes miss, and the rental ROI.
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Fairfax County ADU Permit Process: A Step-by-Step Guide for Homeowners (2026)
Zoning, the PLUS portal, plan review, environmental and health checks, inspections, and the certificate of occupancy. Every step of the Fairfax County ADU permit process, plus a realistic timeline.
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Can You Build an ADU in Fairfax County? The 2026 Zoning Rules Explained
Size limits, setbacks, lot coverage, parking, owner-occupancy, and the full permit process for an ADU in Fairfax County in 2026, plus how Arlington and Alexandria differ.
Read the guide →ADU Rental Income in Northern Virginia: What Homeowners Are Actually Earning in 2026
Real 2026 rental rates across NoVA, which ADU types earn the most, a realistic net-income framework, the instant equity bump, and a break-even timeline for an ADU investment.
Read the guide →Detached vs Attached ADU: Which Is Right for Your Northern Virginia Property?
Cost, privacy and rent premium, construction complexity, and resale value compared, plus a clear framework for choosing a detached or attached ADU on your Northern Virginia lot.
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