Deck Cost Calculator
Estimate what a new deck might cost based on the deck size, material, how high off the ground it sits, and how much railing you need. Adjust the inputs to see the illustrative range update instantly.
Estimates use US customary units (square feet, linear feet) and USD.
Estimated project cost
$21,600
Typical. Range $10,800 – $41,200
- Materials
- $7,800
- Labor
- $11,200
- Contingency
- +12%
Main cost drivers
- Framing & post installation labor$4,800
- Railing material (wood, composite, or metal)$3,300
- Decking board installation labor$3,200
Illustrative estimate — not verified market pricing
These figures are planning estimates for demonstration, not current verified prices. Actual costs vary by region, materials, and contractor. Always get written quotes. See the methodology and sources below.
Want real numbers for your project? Compare written quotes from local pros.
Request contractor quotesWhat drives deck cost
Four factors move the number most: deck area (more square footage means more decking, framing, and labor), material choice (pressure-treated lumber is the budget baseline; composite and PVC are premium), elevation (a second-story deck needs heavier structural framing and longer posts), and railing length (railings are a significant per-linear-foot cost). Stairs and a permit add modest but predictable costs.
Choosing a decking material
- Pressure-treated lumber: The most affordable upfront. Requires periodic sealing or staining. Typical lifespan 15–25 years with maintenance.
- Cedar or redwood: Naturally rot-resistant, attractive appearance. More expensive than pressure-treated; still needs periodic finishing.
- Composite decking: Higher upfront cost with very low maintenance. Resists rot, splinters, and fading. Popular mid-to-premium option.
- PVC / capped composite: Top-tier durability and fade resistance. Best for high-use decks or harsh climates; highest upfront cost.
How to use this calculator
- Enter the total deck area in square feet.
- Select the decking material you are considering.
- Choose the elevation level — ground, raised, or second-story.
- Enter the linear feet of railing needed and toggle stairs.
- Select your state for an illustrative regional cost adjustment.
Ways to save on deck cost
Keep the deck at or near ground level to avoid expensive framing. Choose pressure-treated or a mid-range composite over premium PVC. Keep the footprint simple — rectangular decks are less expensive to frame than curved or multi-level designs. Getting three written quotes helps you identify a fair market price for your area.
Pricing methodology & assumptions
Estimates multiply quantities derived from your inputs by the illustrative unit costs below, apply a state-level regional factor, then add a 12% contingency allowance. Dataset deck-cost v2026.1-illustrative · confidence: illustrative · not independently verified.
| Line item | Type | Unit | Low | Typical | High |
|---|---|---|---|---|---|
| Pressure-treated decking boards | Material | sq ft | $3.00 | $5.00 | $8.00 |
| Cedar/redwood decking boards | Material | sq ft | $5.00 | $9.00 | $15 |
| Composite decking boards | Material | sq ft | $10 | $18 | $30 |
| PVC / capped composite decking | Material | sq ft | $16 | $28 | $45 |
| Framing lumber (joists, beams, posts) | Material | sq ft | $3.00 | $6.00 | $10 |
| Railing material (wood, composite, or metal) | Material | linear ft | $25 | $55 | $120 |
| Hardware, fasteners & concrete footings | Material | sq ft | $1.50 | $3.00 | $6.00 |
| Framing & post installation labor | Labor | sq ft | $8.00 | $15 | $28 |
| Decking board installation labor | Labor | sq ft | $5.00 | $10 | $18 |
| Railing installation labor | Labor | linear ft | $15 | $30 | $60 |
| Stairs — materials & installation | Labor | job | $600 | $1,400 | $2,800 |
| Building permit | Fee | job | $100 | $350 | $800 |
What’s excluded
- Structural, mold, asbestos, or code-upgrade surprises found after demolition.
- Design fees, financing costs, and sales tax (varies by state).
- Premium brand upgrades beyond the selected finish level.
Source
Illustrative planning figures compiled by HomeFixHelper for demonstration. Not verified current market pricing — confirm with local contractor quotes.
Frequently asked questions
How much does it cost to build a deck?
Deck cost depends heavily on size, material, and elevation. A ground-level pressure-treated deck is the most economical option; a composite or PVC deck on a raised second-story adds significant material and framing cost. Use the calculator above for an illustrative range, then confirm with local contractor quotes.
What is the difference between composite and pressure-treated decking?
Pressure-treated lumber costs less upfront but requires regular sealing or staining and has a shorter lifespan. Composite decking costs more initially but resists rot, splinters, and fading with minimal maintenance — making the lifetime cost competitive. PVC/capped composite is the top tier for durability.
Do I need a permit to build a deck?
Most jurisdictions require a building permit for any attached deck or raised deck over a certain height (commonly 30 inches). Permit requirements vary widely by city and county. Check with your local building department before starting — the calculator includes an illustrative permit allowance.
How much does railing add to the cost?
Railing material and installation can add $40–$180 per linear foot depending on the style (basic pressure-treated, composite, metal cable, or glass panels). For a 60-linear-foot railing run that is a meaningful share of the total project. Deck codes typically require railing on any deck 30 inches or more above grade.
Are these figures verified market prices?
No. All prices in this calculator are illustrative planning estimates for demonstration purposes only — not verified current market data. Material and labor costs vary significantly by region, season, and contractor. Always get written quotes from licensed local contractors before budgeting.