Deck building is one of the most rewarding residential carpentry jobs and one of the most variable to price. The square footage matters. The material matters more. The site conditions, the railing choice, and the access can move the per-square-foot price by 50% or more. Getting the bid right means understanding what's actually being built before any number leaves your mouth.

This article walks through how a typical residential deck actually prices, in 2026, for a Philadelphia metro market. Adjust your inputs and the structure works.

The four-question deck conversation

Before any estimate, you need to know:

  1. How big is the deck (square footage)?
  2. What material? (Pressure-treated, cedar, composite, PVC)
  3. What height above grade? (Ground-level vs second-story changes structure significantly)
  4. What does the customer want for railings? (Wood, composite, metal, cable)

Those four answers determine 80% of the price. The remaining 20% is access, footings, stairs, and finish details.

The base prices per square foot

For Philadelphia metro 2026 pricing, full deck build with footings and structure included:

These are flat-rate, all-in prices that include framing, decking, basic perimeter railing, footings, and the main structural work. Stairs, complex railings, skirting, and other add-ons are line-item extras.

The price scales with size, but not perfectly linearly. Very small decks (under 100 sqft) cost slightly more per square foot because of fixed setup time. Very large decks (over 500 sqft) sometimes get a discount because the perimeter-to-area ratio is more efficient.

What's actually inside the price for a 200-square-foot pressure-treated deck

A typical 200-sqft single-level pressure-treated deck at $70/sqft = $14,000:

Footings. 4 to 8 concrete footings depending on layout, dug to frost depth (about 36 inches in Philadelphia metro), with sonotube forms and concrete. Adds about $80-$200 per footing.

Framing. 2x10 or 2x12 ledger board attached to the house, doubled outside band, joists at 16-inch on-center spacing, joist hangers, hurricane ties. Pressure-treated lumber rated for ground contact.

Decking boards. 5/4-inch thick pressure-treated decking boards, fastened with deck screws or hidden fasteners depending on customer preference. Composite decking uses different fasteners and slightly different installation.

Basic railing. Pressure-treated 2x4 top rail, 2x2 balusters at code-compliant 4-inch maximum spacing, posts every 6 feet.

Labor. Roughly 50 hours of carpenter labor for a 200-sqft single-level deck with normal complexity. Solo carpenters can take longer; two-person crews can move faster.

Permit and inspection. Almost universally required for new deck construction. Permit fees vary by jurisdiction, $200 to $500 typically.

The material conversation that customers don't understand

Customers see "pressure-treated" as the cheap option and "composite" as the expensive option, and they're right about the relative pricing but wrong about why each makes sense.

Pressure-treated is the most affordable material upfront ($70/sqft installed in 2026). It's also a real wood deck that requires annual or biannual sealing/staining to keep its appearance. If the customer is willing to do that maintenance, PT is a great option that lasts 15-25 years. If they're not, PT will look weathered and rough within 3-5 years and they'll wish they'd gone composite.

Cedar is the upgrade for customers who want a real wood deck with better natural rot resistance and a more attractive appearance. It still requires sealing, just less frequently. Costs about 30% more than PT installed.

Composite ($110/sqft installed) costs 50-60% more than PT but requires essentially zero maintenance for the life of the deck (typically 25-30+ years). The math usually works out: composite costs more upfront but saves on maintenance over time. For customers who plan to stay in the home 10+ years, composite is the right choice.

PVC is the premium tier above composite. Higher cost, lighter weight, and the cleanest look (no wood fibers in the cap layer). Worth it for high-end installs but overkill for most.

What pushes the price higher

Elevated decks (second-story or significant height). A deck 8 feet above grade is structurally and logistically different from a ground-level deck. Larger footings, more substantial posts, code-required guard rails at proper height (42 inches usually for elevated decks), and access challenges during construction. Add 20-40% to the base per-sqft price.

Stairs. Each step costs about $280 in labor and materials. A 4-step set is $1,120. A multi-flight stairway with landings is significantly more.

Premium railing systems. A standard pressure-treated railing is included in the base $70/sqft. Composite railing runs $60+ per linear foot installed. Metal or aluminum railing is similar. Cable railing is $80-$120 per linear foot.

Skirting. Decorative panels under the deck to hide the substructure. About $40 per linear foot installed.

Rot in existing structure. If you're building a deck that ties into an existing ledger board on the house, and that ledger area has rot or water damage, you have to repair the rim joist or rim board before attaching anything. Add $300-$1,500 depending on the damage.

Hard footings. Bedrock at 18 inches, mature tree roots, buried utilities, or backfill that won't compact. Each can add hours per footing.

Built-in features. Bench seating, planter boxes, pergola overhead, lighting, electrical outlets, gas line for grill. Each is its own scope addition.

Custom design or unusual angles. A simple rectangular deck is the cheapest. Wraparound, curved, or multi-level decks can add 25-50% to per-sqft pricing.

Permit complexity. Most municipalities require structural drawings for elevated decks. Some require an engineer's stamp on those drawings. Add $300-$800 if drawings are required.

What pulls the price lower

Replacement of existing deck (same footprint). If you're tearing off old decking but the framing and footings are sound, you're saving the structural work. Re-decking with PT runs about $40/sqft, with composite about $55-$65/sqft.

Ground-level platform. A deck less than 30 inches above grade may not require railings at all (varies by jurisdiction). No railings means lower cost.

Existing footings. If old footings are in good shape and you're rebuilding the deck on top of them, you skip the most labor-intensive part of the build.

Customer-supplied decking. Some customers buy the decking from a big-box store on sale. Quote labor only and let them supply. The risk is them buying the wrong material or dealing with warranty issues themselves.

The conversation about lifetime cost

Customers focused on initial price often miss the lifetime cost picture. A simplified comparison for a 200-sqft deck over 25 years:

Pressure-treated: $14,000 install + ~$3,500 in cleaning, sealing, and partial board replacement over 25 years = $17,500 lifetime.

Composite: $22,000 install + ~$1,000 in occasional cleaning over 25 years = $23,000 lifetime.

Composite costs about $5,500 more over 25 years. For customers planning to stay long-term, that's about $220/year for never having to seal a deck again. Many find that easy math.

For customers planning to sell in 5-7 years, the calculus is different. Composite has higher resale appeal, but the upfront cost difference may not fully recover at sale. Match the recommendation to the customer's situation.

Why a flat rate book matters here

Deck pricing is one of the most-shopped residential carpentry jobs. Customers get 3-5 quotes for any major deck build. The contractor whose pricing is consistent, line-itemed, and matched to a real per-sqft methodology is the one who wins on trust, even if they're not the cheapest.

The Carpentry Flat Rate Price Book covers all the deck scenarios above plus 240-plus other carpentry services, all priced from a single set of inputs you control.

The bottom line

A typical residential deck in 2026 prices around $70/sqft for pressure-treated, $90/sqft for cedar, and $110/sqft for composite in a Philadelphia metro market. Elevated decks, premium railings, stairs, and complex designs push the per-sqft price higher. Replacement decking on existing structure pulls it lower.

The contractors winning deck bids are the ones presenting clear scope, line-itemed pricing, and matching material recommendations to the customer's actual situation. The ones losing money are the ones quoting "around $50 a foot" before they've measured anything.

Frequently Asked Questions

How long does a typical deck build take?
A 200-sqft single-level deck runs 4-7 days for a two-person crew, depending on weather and material. Larger or more complex decks run 2-4 weeks. Elevated decks, decks with stairs, or wraparound designs take longer.

Should I include the decking material or have the customer buy it?
Almost always include it. Quality control matters, and customers who self-source often buy the wrong product. Include it at standard markup and warranty the install.

What about the permit and inspection?
Almost every jurisdiction requires a permit for new decks. Most also require footing inspection (before pouring) and final inspection. Include permit and inspection coordination time in your quote.

How do I price unusual deck shapes?
Calculate the actual square footage. For curved or angled decks, add 15-25% to the per-sqft price for the additional cutting, fitting, and waste. Customers want curved decks; just price them honestly.

What's the markup on composite vs pressure-treated decking?
Composite material costs roughly 2.5-3x what PT costs at the supply house. The labor is comparable (slightly more for composite due to careful fastener placement). The price difference customers see ($70 vs $110/sqft) reflects mostly the material cost difference plus standard markup.