Deck Construction Cost & ROI Calculator

Cost scales with square footage, height, railing, stairs, and wood vs composite. A common 12×16 pressure-treated deck often plans in the mid four figures materials-only and higher installed. Use Compare mode to see materials-only budgeting against professional installation with labor and contingency.

Low decks with simple rectangular geometry can be DIY for experienced homeowners. Multi-level, ledger-attached, or high decks usually need professional structural review and often a permit. The calculator flags elevated risk cases.

Usually yes for attached decks and many freestanding decks over a height/area threshold. Confirm with the local building department before digging footings. Unpermitted decks can become sale and insurance problems.

Assumptions (not a quote): 12×16 (~192 sq ft) single-level deck ~2–3 ft above grade, pressure-treated framing and decking, basic rail, one stair run, ledger to house with proper flashing. DIY materials often plan roughly $1,800–$3,500. Professional installed commonly plans around $4,500–$9,000 depending on footing conditions, railing style, and site access. Composite decking pushes both ranges higher. Your height, stairs, and material choice will change the number. See the local deck cost market answers for citeable city context.

Pressure-treated wood costs less upfront but needs ongoing sealing/staining in freeze–thaw climates. Composite costs more upfront and usually less maintenance. Compare 10-year ownership cost, not just day-one price.