Decks planning tool

Deck Cost Calculator

Enter scoped local rates rather than relying on a national average. The output is planning arithmetic, not a quote.

Local-rate planning

Build a scoped deck cost range

No national prices are prefilled. Enter comparable local rates and allowances; the result is not a quote.

Deck length (ft)Overall deck length in feet.

Deck width (ft)Overall deck width in feet.

Waste (%)Percentage applied to square-foot material and labor scope.

Local material low rate ($/sq ft)Low material rate in dollars per square foot. Fractional-cent unit rates are accepted and totals are rounded to cents.

Local material high rate ($/sq ft)High material rate in dollars per square foot. Fractional-cent unit rates are accepted and totals are rounded to cents.

Local labor low rate ($/sq ft)Low labor rate in dollars per square foot. Fractional-cent unit rates are accepted and totals are rounded to cents.

Local labor high rate ($/sq ft)High labor rate in dollars per square foot. Fractional-cent unit rates are accepted and totals are rounded to cents.

Railing length (linear ft)Total railing length in linear feet; enter zero for none.

Railing low rate ($/linear ft)Low railing rate in dollars per linear foot. Fractional-cent unit rates are accepted and totals are rounded to cents.

Railing high rate ($/linear ft)High railing rate in dollars per linear foot. Fractional-cent unit rates are accepted and totals are rounded to cents.

Stair add-on area (sq ft)Optional user-entered stair area; enter zero for none. No stair geometry, count, or structure is inferred.

Local stair low rate ($/sq ft)Explicit low rate for only the entered stair add-on area.

Local stair high rate ($/sq ft)Explicit high rate for only the entered stair add-on area.

Permit/design allowance low ($)Low permit and design allowance in dollars.

Permit/design allowance high ($)High permit and design allowance in dollars.

Plan responsibly

Before You Build

This project may be subject to local permit, zoning, site, or structural requirements.

Verify permit scopeConfirm local permits, drawings, and inspections.
Verify foundationsVerify soil, frost, drainage, loads, and site conditions.
Verify the assemblyConfirm ledger, foundations, guards, stairs, loads, materials, connectors, and local adoption.

Planning arithmetic only: User-entered prices are not a quote.

No structural design: This does not design a ledger, foundation, guard, stair, connection, or load path.

View code references

Model-code reference

2012 OTHER, Section DCA 6

Prescriptive residential wood deck guidance: DCA 6 is model guidance, not proof of local adoption. This calculator does not apply its structural provisions.

Source: American Wood Council — DCA 6 Prescriptive Residential Wood Deck Construction Guide · Reviewed 2026-08-26

Local requirements may differ. A model-code reference does not confirm the code edition, amendments, zoning rules, or permit requirements adopted where the project is located.

Model-code references

2012 OTHER, Section DCA 6: Prescriptive residential wood deck guidance. Source: American Wood Council — DCA 6 Prescriptive Residential Wood Deck Construction Guide. Reviewed 2026-08-26.

Local requirements may differ. Verify the adopted code, amendments, zoning rules, and permit requirements with the local authority.

Methodology

How we calculate this

The calculator multiplies rectangular area plus entered waste by each material/labor square-foot rate, prices entered railing length separately, prices only the user-entered stair add-on area with explicit stair square-foot rates, then adds the permit/design allowance. It infers no stair geometry or structure.

total range = area × (1 + waste) × material/labor rates + railing length × railing rates + entered stair add-on area × stair rates + permit/design allowance

Use comparable local inputs

Enter current rates with matching material, labor, tax, delivery, removal, access, and finish scope.

Design is outside this estimate

Verify structure, ledger, foundations, guards, stairs, loads, species, grade, connectors, local adoption, and permits separately.

Keep add-ons explicit

Use zero only when an item is genuinely outside scope; otherwise enter a transparent local range or allowance.

Worked examples