District of Columbia Deck Calculator
Deck boards, fasteners, and total cost for your deck size. Cost estimates adjusted for District of Columbia — about 2% above the national average.
Last reviewed July 2026 · Free · Nothing you enter is stored
District of Columbia pricing
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Estimates use 2026 national averages adjusted by District of Columbia's construction cost index (1.02). Always get local quotes.
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Deck costs in District of Columbia
District of Columbia's overall construction pricing runs about 2% above the national average, based on published location cost factors that blend local labor rates and material prices. This page applies that 1.02 index to the national averages in our deck calculator, so the material quantities are identical — it's the dollar estimates that shift to District of Columbia levels.
How this calculator works
Board math uses standard 5.5"-wide decking with a 1/4" gap: 2.09 linear feet of board per square foot of deck, plus 10% waste (15% for diagonal layouts). Hidden fasteners or screws run about 3.5 per square foot. Cost estimates use 2026 installed averages — $35/sq ft pressure-treated, $57/sq ft composite — and a DIY materials-only average around $20/sq ft.
Frequently asked questions
How much does deck cost in District of Columbia?
Construction pricing in District of Columbia runs about 2% above the national average (cost index 1.02 vs. 1.00 national). This calculator applies that factor to 2026 national average prices to produce District of Columbia-adjusted estimates. Local quotes can still vary by metro area, season, and contractor demand.
Is it cheaper to DIY or hire a pro in District of Columbia?
Labor is the bigger share of installed cost, so in District of Columbia, the DIY-vs-pro math tracks the national picture. The calculator shows both estimates so you can compare.
Are these District of Columbia prices exact?
No — they're planning estimates: national survey averages adjusted by a published state cost index. Prices differ between cities within District of Columbia, by material grade, and by season. Use these numbers to budget and sanity-check quotes, not to replace them.
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