Deck replacement costs vary 3-5x based on material choice. A small pressure-treated deck might run $4,500; the same footprint in composite might be $14,000; a tropical hardwood deck might be $22,000. Material drives most of the differential, but framing condition, structural upgrades to current code, and railing systems all contribute.
This guide is organized the way the decision actually plays out in practice: what matters, what does not, and the reasoning behind each recommendation. Numbers and ranges reflect 2026 Connecticut, Massachusetts, and New York conditions and pricing.
Quick answer
2026 deck cost per sq ft: pressure-treated wood $25-$45; cedar $30-$55; composite $40-$80; hardwood (ipe, cumaru) $50-$100; PVC $50-$95. Typical 200 sq ft deck total: pressure-treated $5,000-$9,000; cedar $6,000-$11,000; composite $8,000-$16,000. Larger 400 sq ft deck total: pressure-treated $10,000-$18,000; composite $16,000-$32,000. Add ledger and structural upgrades to current code for older homes (+$1,500-$5,000). Railings: $30-$120 per linear foot. Permits required for any structural deck work. Always verify ledger attachment to current IRC R507 standards.
Field context
Cost ranges published in a guide like this are benchmarks, not guarantees. Each range reflects a band within which most fair-market invoices actually land — low end for a clean, uncomplicated job in normal business hours, high end for predictable complications and peak-season pricing. The middle is where most real invoices sit. The ranges are built from trade-association wage data, aggregated regional cost-guide benchmarks, manufacturer and retailer equipment pricing, and current utility rebate schedules. Three important caveats follow from how the ranges are built.
First, the ranges are not negotiating targets. Contractors price to their local market, their own overhead and schedule, and the specific scope of the job in front of them. A contractor whose bid comes in near the middle of the published range is not overcharging; a contractor whose bid falls 15% below the low end is usually missing scope rather than offering a better deal. The useful pattern is three bids on identical written scope, not a single bid compared to the published range.
Second, the ranges shift materially with seasonality, location, and labor market conditions. Peak heating and cooling seasons push HVAC and plumbing invoices 10-20% higher than shoulder seasons. Coastal Connecticut, Boston metro, and New York City metro labor rates run 15-25% above national averages. The ranges here are calibrated to 2026 CT/MA/NY conditions; readers in markedly different markets should adjust expectations.
Third, cost is not the same as value. The lowest number that completes the job correctly, with licensed work by a contractor who stands behind it, is usually the cheapest outcome over a 10-year horizon even when it is not the cheapest invoice in the quote stack. Most homeowners who look back at a major project with regret report choosing on price alone.
Material comparison
Pressure-treated wood
Cheapest. Workhorse material. Lifespan 15-25 years with maintenance. Requires staining/sealing every 2-3 years.
Cost: $25-$45 per sq ft.
Cedar / redwood
Naturally rot-resistant softwoods. Cedar is most common; redwood now rare. Lifespan 20-30 years with stain.
Cost: $30-$55 per sq ft.
Composite (Trex, TimberTech, etc.)
Wood-plastic composite. Low maintenance, no painting. Lifespan 25-30+ years. Capped composite (newer) has fewer fade and stain issues than older uncapped.
Cost: $40-$80 per sq ft.
PVC (Azek, etc.)
100% plastic. Most expensive but most durable. Lifespan 30-50 years. No moisture absorption.
Cost: $50-$95 per sq ft.
Hardwood (ipe, cumaru, mahogany)
Premium tropical hardwoods. Naturally rot-resistant. Beautiful but expensive. Requires hardwood-rated fasteners.
Cost: $50-$100+ per sq ft.
Aluminum
Niche material. Used in commercial more than residential.
Cost components
Materials (40-50% of budget)
Decking + structural framing + fasteners + railings.
Labor (35-50%)
Demolition + framing + decking installation + railings.
Permits and design
$150-$1,200 typical.
Add-ons
Stairs (per stringer/step), built-in benches, lighting, hot tub footing, structural upgrades.
Replacement vs. just decking
Just decking (re-decking)
If framing is sound, only the deck surface, fasteners, and possibly railings are replaced.
Cost: typically 50-65% of full replacement.
Full replacement
Framing assessed; replaced if compromised. Most pre-2012 decks should be considered for structural upgrade to current ledger and connection standards.
Code considerations (IRC R507)
Modern deck code (post-2012) requires:
- Specific lag bolt or through-bolt sizing
- Specific ledger flashing
- Specific guard and railing requirements (4-inch sphere can't pass through)
- Specific stair construction
- Lateral load connections
- Footings sized for soil and load
Pre-2012 decks rarely meet current code. Replacement typically triggers code-compliance work.
What deck replacement actually costs in 2026
National ranges. Per typical configurations.
Small deck (12x12, 144 sq ft)
| Material | Low | Typical | High |
|---|---|---|---|
| Pressure-treated | $3,500 | $5,000 | $6,500 |
| Cedar | $4,500 | $6,500 | $8,000 |
| Composite | $6,000 | $9,000 | $12,000 |
| PVC | $7,500 | $11,000 | $14,000 |
| Hardwood | $7,500 | $11,500 | $15,000 |
Mid-size deck (16x20, 320 sq ft)
| Material | Low | Typical | High |
|---|---|---|---|
| Pressure-treated | $8,000 | $12,000 | $16,000 |
| Cedar | $10,000 | $15,000 | $19,000 |
| Composite | $13,000 | $20,000 | $26,000 |
| PVC | $16,500 | $24,000 | $30,500 |
| Hardwood | $16,500 | $25,000 | $32,000 |
Large deck (20x25, 500 sq ft)
| Material | Low | Typical | High |
|---|---|---|---|
| Pressure-treated | $12,500 | $19,000 | $25,000 |
| Cedar | $15,500 | $23,000 | $30,000 |
| Composite | $20,000 | $30,000 | $40,000 |
| PVC | $25,000 | $37,500 | $48,000 |
| Hardwood | $25,000 | $40,000 | $50,000+ |
Add-ons
| Item | Cost |
|---|---|
| Stairs (per stringer with steps) | $400-$1,500 |
| Railings (per linear foot) | $30-$120 |
| Built-in seating | $500-$2,500 |
| Deck lighting | $300-$2,500 |
| Pergola or shade structure | $2,500-$15,000 |
| Hot tub structural support | $1,500-$5,000 |
| Permit and inspection | $150-$1,200 |
| Demolition of old deck | $500-$2,500 |
ROI
Deck additions typically return 50-75% of cost at resale per Remodeling Magazine's Cost vs. Value report. Composite decks return slightly higher than wood due to lower maintenance expectation.
Diligence and documentation
Diligence on cost management centers on three practices. First, written scope before any contractor conversations. A scope document listing every line item — equipment, labor, materials, permits, disposal, warranty terms — standardizes quotes and exposes where contractors are pricing differently. Second, three competitive bids on identical scope, not three contractor interviews followed by loose estimates. Third, license and insurance verification through the relevant state registry, plus two references on similar jobs completed in the preceding two years. These steps take a few hours and routinely save five to fifteen percent on the final invoice, independent of any negotiation.
Documentation at the back end matters as much as diligence at the front. A paid invoice with itemized scope, photographs of the completed work, and a record of any permits pulled belongs in the homeowner's records — not just for warranty claims but for the eventual resale, where a documented maintenance and improvement history routinely adds real value at closing. The homeowners who build this habit from day one of ownership tend to recover disproportionately more of their project costs when they sell; the homeowners who treat records casually tend to give money back at inspection.
Bottom line
The honest bottom line on cost: the right number is rarely the lowest quote. It is the lowest quote attached to complete scope, licensed work, and a contractor whose license, insurance, and references check out. Every one of those three items has quietly saved more money than bid negotiation in the long arc of home ownership.
Related Stela Home coverage
- Cost to Replace All Windows in a House
- Cost to Insulate an Attic
- Cost to Repaint a House Exterior
- Cost to Repave a Driveway
How Stela Home helps
Three Stela Home tools work together on this kind of decision:
- Stela Report — pre-purchase property intelligence with disclosure, condition, and risk flags.
- Repair Calculator — modeled cost ranges by category and ZIP, calibrated with regional and complexity multipliers.
- Stela Guides — step-by-step repair walkthroughs reviewed by licensed professionals, with safety callouts and disclosure.
Sources and further reading
- International Residential Code (IRC) Section R507 — exterior decks
- North American Deck and Railing Association (NADRA)
- American Wood Council — DCA 6 deck construction