How Much Does a Deck Cost?
A professionally built deck often costs about $30 to $60 per square foot installed, but homeowners get in trouble when they budget only for the surface boards. Height, railing, stairs, framing complexity, and local labor pressure can move the quote fast. Use the calculator below to compare a basic platform deck against more realistic elevated or premium-material scenarios before you request bids.
Showing national averages
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Updated March 2026 · Based on live pricing and permit research from Angi, HomeGuide, Modernize, Decks.com, Trex, TimberTech, and city permit guidance from Portland, Seattle, Denver, and Austin
Deck Cost by Material
Material selection shapes both the initial quote and the long-term ownership story. Pressure-treated lumber wins on upfront price. Cedar adds curb appeal but still needs maintenance. Composite and PVC usually cost more at installation, yet they appeal to owners who want less staining, sealing, and board replacement over time.
| Material | Installed cost per sq ft | 240 sq ft deck | Best fit |
|---|---|---|---|
| Pressure-treated | $24 to $36 | $5,800 to $8,600 before stairs and railing | Best fit when upfront budget matters most and routine sealing is acceptable. |
| Cedar | $29 to $42 | $7,000 to $10,100 before stairs and railing | Natural wood upgrade with higher material cost and ongoing maintenance needs. |
| Composite | $36 to $52 | $8,600 to $12,500 before stairs and railing | Higher upfront total, but attractive for lower maintenance and stable finish. |
| PVC | $42 to $60 | $10,100 to $14,400 before stairs and railing | Premium low-maintenance tier with the widest spread across brands and systems. |
The Biggest Pricing Drivers
Square footage gets the most attention, but deck quotes move just as much on structural scope and finish details. Homeowners who compare only the headline total often miss why one proposal lands thousands above another. These are the inputs that usually explain the spread.
Height and framing
Ground-level decks are the simplest to price. Elevated and second-story decks require stronger framing, more labor, and guardrail systems that increase both materials and inspections.
Stairs and railing
Stairs add framing, stringers, treads, landings, and finish work. Railing compounds by linear foot, so an open perimeter design can swing the total harder than many homeowners expect.
Site conditions
Tight access, steep slopes, poor soil, and difficult haul paths all increase labor time. Site friction is one of the main reasons clean national averages break down in real jobs.
Permit and regional labor pressure
City rules can change the structural review path, and state labor markets materially change installed pricing. The same deck rarely costs the same in Mississippi, Texas, Washington, New Jersey, and California.
Ground-Level vs Elevated Deck Costs
The structural jump from a low platform deck to an elevated deck is where many quote surprises start. Once posts, footings, guard requirements, and staging increase, the installed price per square foot can move quickly.
| Deck type | Typical cost effect | Why it changes |
|---|---|---|
| Ground-level platform | Baseline | Simplest framing and easiest labor conditions when the site is level and open. |
| Elevated deck | About 15% to 30% above ground-level | More structure, more labor, and usually code-triggered guardrails. |
| Second-story deck | About 55% to 75% above ground-level | Heavy structural demands, more staging, and strict safety and guard requirements. |
Permit, Code, and Site Reality
Deck permitting is not a simple yes-or-no checkbox. Research for this page found city examples where permit triggers change at different deck heights and where site-development or zoning rules matter before structural review even starts. That is why the calculator treats permit cost as an allowance, not a fixed national constant.
Portland, Seattle, Denver, and Austin all publish deck-related permit guidance, but the thresholds and workflows do not line up cleanly enough to support a national one-size-fits-all rule. Homeowners should use the calculator to budget the project, then verify local code triggers before signing a fixed-price contract.
How to Compare Deck Quotes Without Guessing
The cleanest quote is not always the best quote. Many contractor proposals look similar because they compress real scope detail into one short allowance line. If you want useful bids, ask each contractor to show these items explicitly.
- Decking material and brand line, not just a generic label like composite
- Framing scope, including beam, footing, and ledger assumptions
- Railing system type and linear footage included
- Stair count, width, landing requirements, and finish details
- Demolition, haul-away, and disposal handling
- Permit filing responsibility and allowance amount
- Site work assumptions such as grading, excavation, and access restrictions
- Finishing scope for wood decks, including stain or seal application
This matters most when comparing pressure-treated against cedar, composite, or PVC because brand tiers, railing systems, and stair packages can make two supposedly similar quotes describe very different projects.
Methodology and Assumptions
CostFigure modeled this calculator from live March 2026 research across national pricing publishers, manufacturer guidance, and official city permit pages. Installed deck cost ranges are anchored to the recurring benchmarks found across Angi, HomeGuide, Modernize, Decks.com, Trex, and TimberTech, then adjusted for material tier, deck height, stair scope, railing, framing complexity, site conditions, permit allowance, demolition, and state-level labor pressure.
CostFigure explicitly deferred a state-level deck pSEO rollout for now. The pricing signal is strong enough for a national calculator, but not yet backed by enough consistent state-by-state primary source coverage to justify indexable regional deck pages that meet the repo's quality bar. When the regional dataset is stronger, those pages can ship with a clearer source of truth.
Frequently Asked Questions
How much does a deck cost in 2026?
Most professionally built decks land around $30 to $60 per square foot installed in 2026, but real quotes can move outside that range once deck height, stairs, railing, and local labor pressure are included. A modest ground-level pressure-treated deck may stay in the high four figures or low five figures, while a composite or PVC deck with railing and stairs can push well into the mid-five figures. That is why a range-based calculator is more useful than a single average.
Is composite decking worth the extra upfront cost?
Composite decking usually costs more up front than pressure-treated lumber, but it can make sense if you care about maintenance time, color consistency, and longer replacement cycles. The premium often shows up in both the deck boards and the railing system. If your goal is the lowest initial quote, pressure-treated lumber usually wins. If your goal is lower ongoing staining, sealing, and board replacement, composite can be justified even when the installation total is materially higher.
What adds the most to deck cost besides square footage?
Deck height, stairs, and railing usually move the budget the fastest after square footage and material. A ground-level platform is simpler to frame than an elevated or second-story build. Stairs add framing, stringers, landings, and more finish material. Railing adds linear-foot costs that compound quickly on open perimeter layouts. Site access, sloped yards, and custom framing geometry also raise labor cost even when the deck footprint stays the same.
How much do deck stairs and railing cost?
A standard stair run often adds roughly $1,200 to $2,600 before regional labor adjustments, while wider or wraparound stairs can cost materially more. Railing is typically priced by linear foot and can range from budget wood systems to expensive metal or cable assemblies. If your deck sits high enough to trigger code-required guards, railing is not an optional add-on. It becomes a core part of the project budget and should be broken out clearly in every contractor quote.
Do I need a permit for a deck?
Sometimes, and the answer changes quickly by city. Portland, Seattle, Denver, and Austin all publish deck or accessory structure rules that show how deck height, attachment, site coverage, floodplain rules, and structural scope can change the permit path. A low platform deck might avoid a full structural permit in one city and still need review in another. CostFigure treats permit cost as an allowance because local code triggers are too fragmented for one national flat fee.
Is cedar cheaper than composite decking?
Cedar often sits between pressure-treated lumber and composite on installed cost, but the spread depends on grade, local lumber supply, and the railing package. In many markets cedar beats composite on upfront price while still delivering a more premium look than pressure-treated lumber. Composite usually overtakes cedar when the owner prioritizes lower maintenance and more stable appearance over time. The right comparison is not just board price. It is total installed cost plus the upkeep you are willing to handle.
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