Deck Installation Cost in Gaithersburg, MD
Based on 1,169 deck installation building permits filed in Gaithersburg between 2015 and 2026, the typical declared project value is $14,711, with most landing between $7,000 and $25,000. These are real records from Gaithersburg's public building-permit data, declared job values, not contractor estimates or AI guesses.
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Deck Installation values over time in Gaithersburg
Median declared value moved from $15,808 in 2021 to $22,000 in 2026, up 39% over that span. Each year below is computed from the filings that actually cleared in Gaithersburg.
Recent deck installation permits in Gaithersburg
Actual filings from Gaithersburg's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2026-06-16 | $17,000 | DECK - Replace joists beam and support posts and railings on existing footings. same size |
| 2026-06-16 | $30,000 | CONSTRUCT 16'X17' SCREEN ROOM AND 16'X19' OPEN DECK. 4' WIDE STEPS TO GRADE. 3' HIGH. Mixe |
| 2026-06-16 | $62,000 | Building a freestanding deck with porch |
| 2026-06-12 | $10,185 | Building freestanding 12x10 deck with steps,New Deck |
| 2026-06-10 | $8,800 | Replace existing wood deck with stairs to a new 18'x12' (216 sq. ft.) wood deck (NO STAIRS |
| 2026-06-05 | $25,000 | Design/build 17' x 16' deck, 18 inches off the ground, attached to house, not screened in |
| 2026-06-01 | $26,021 | BUILDING A FREESTANDING DECK 24X16,New Deck |
| 2026-05-28 | $12,000 | Construct a new 18'x12' deck,New Deck |
| 2026-05-27 | $19,500 | New 10 x 12 composite deck with stairs. ,New Deck. using deck details. |
| 2026-05-26 | $27,900 | Customer Wants To Use ePlans,Building freestanding deck 20x16 with steps,New Deck |
| 2026-05-22 | $28,000 | CONSTRUCT A COMPOSITE DECK W/LANDINGS(S), STAIRS AND VINYL RAILINGS,New Deck |
| 2026-05-15 | $6,000 | Build 11'x7' elevated composite deck/balcony with privacy lattice screen on one side. (no |
| 2026-05-12 | $11,500 | we are using Scorpion contractors MHIC # 127045 to rebuild the deck using Montgomery Count |
| 2026-05-11 | $45,000 | Existing deck repair |
| 2026-05-11 | $25,563 | Demo and replace existing deck with a 24' X 14' deck with one set of steps. ,New Deck |
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Add your price →How to read these numbers
A permit's declared value is the job cost the owner or contractor stated when they pulled the permit. It tracks the real cost of the work but can run a bit under what was actually paid, since it often leaves out some labor and finish costs. Treat the range as a grounded starting point. What deck installation actually costs in Gaithersburg comes down to home size, materials, and scope.
Where this comes from
Every figure is pulled from Gaithersburg's public building-permit records and classified by the work described. Nothing is estimated or AI-generated. How the data works. The moment a Gaithersburg homeowner adds a real receipt, this page upgrades to show what neighbors actually paid next to these permit values.
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