Deck / Patio Permit Requirements in Washington, DC
When you DON'T need a permit
Freestanding decks not exceeding 30 inches above grade do not require a building permit in Washington, DC.
Source: DC Construction Code
When you DO need a permit
Attached decks require a building permit in Washington, DC due to structural connection to the home.
Estimated fee: $120 – $480
Typical timeline: About 2 weeks
Source: DC Construction Code
Decks more than 30 inches above grade require a building permit in Washington, DC. Structural plans and guard rails required.
Estimated fee: $180 – $720
Typical timeline: About 3 weeks
Source: DC Construction Code
Large covered decks (300+ sq ft) require building and zoning permits in Washington, DC.
Estimated fee: $300 – $960
Typical timeline: About 4 weeks
Source: DC Construction Code
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Frequently Asked Questions
Estimated permit fees for Deck / Patio projects in Washington, DC range from $120 – $480. Fees vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Deck / Patio projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in Washington can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for Deck / Patio permits in Washington is About 2 weeks. More complex projects may take longer if plan review is required.