Composite Costs More Today. Wood Costs More Over 20 Years.
A 300 square foot pressure-treated wood deck in Westchester County runs $6,000 to $12,000. The same deck in Trex composite costs $14,500 to $19,500. That $8,000 difference is where most homeowners stop reading.
But pressure-treated wood needs to be stained or sealed every one to two years to stay in good condition. Over 20 years, those maintenance cycles add $10,000 to $20,000 to a wood deck, and most wood decks need significant board replacement or rebuilding by the 12 to 15-year mark.
Composite decking, by contrast, requires almost no maintenance beyond periodic cleaning. The 25-year warranties from brands like Trex and TimberTech are based on field performance data. They hold up in practice.
The 20-year math consistently favors composite for homeowners who intend to use and maintain their deck.
2026 Installation Costs (300 sq ft Deck)
All prices reflect Westchester and Fairfield County labor rates, which are among the highest in the region. Rockland and Putnam County prices run 15 to 25 percent lower. Labor typically accounts for 45 to 55 percent of total deck cost.
| Material | Cost per sqft (Westchester/Fairfield) | 300 sqft Total | Warranty |
|---|---|---|---|
| Pressure-treated pine | $20 - $40 | $6,000 - $12,000 | None (material only) |
| Cedar | $30 - $55 | $9,000 - $16,500 | None (material only) |
| Composite (Trex, TimberTech) | $48 - $65 | $14,500 - $19,500 | 25 years (fade/stain) |
| PVC decking (AZEK) | $55 - $80 | $16,500 - $24,000 | 30 years |
Pressure-Treated Wood: The Budget Option
Pressure-treated pine is the default choice for deck framing across the Northeast, and it is a reasonable choice for the decking surface itself when budget is the primary concern.
The upfront cost is the lowest of any decking material. A competent contractor can build a solid 300 square foot deck for $6,000 to $12,000 in Westchester, and significantly less in Rockland and Putnam counties where labor rates are lower.
The problem is what happens after the first few years. Pressure-treated wood requires staining or sealing every one to two years to prevent water absorption, cracking, and rot. A professional deck refinishing job on a 300 square foot deck runs $500 to $1,500 each time, depending on condition and stripping requirements. Many homeowners skip this maintenance, and the deck deteriorates accordingly.
Wood also splinters, warps, and develops cracks as it cycles through freeze-thaw seasons. By year 10 to 12, it is common to see boards cupping and splitting, loose fasteners, and soft spots where water has penetrated. A full reboard of a 300 square foot deck adds another $3,000 to $6,000.
Cedar performs better than pressure-treated in terms of appearance and natural rot resistance, but it costs more upfront and still requires the same maintenance cycle.
Composite Decking: The Long-Term Play
Composite decking is made from a blend of wood fiber and plastic, encased in a protective polymer shell. It does not rot, warp, crack, or splinter, and it needs no staining, sealing, or painting. Cleaning with a hose and occasional soap is all the maintenance required.
The warranties are significant. Trex Transcend, TimberTech PRO, and AZEK PVC products carry 25 to 30-year warranties against fading, staining, and structural defects. For a material that costs $48 to $65 per square foot installed, that coverage shifts the risk calculation considerably.
In the Northeast climate, composite holds up better than wood through repeated freeze-thaw cycles. It does not absorb water, so there is no swelling or cracking. Darker composite boards can get hot in direct sun during summer, which is worth noting if your deck gets full afternoon exposure. Light or medium colors handle heat better.
The only material limitation of composite is that it flexes slightly underfoot compared to wood, which some people notice. PVC decking (AZEK) is stiffer and eliminates this, but costs $7 to $15 more per square foot.
20-Year Total Cost of Ownership
Based on a 300 square foot deck in Westchester County at mid-range pricing. Wood maintenance assumes staining every 18 months plus one partial reboard at year 12. Composite maintenance assumes annual cleaning only.
| Material | Build Cost | 20-Year Maintenance | Replacement/Reboard | 20-Year Total |
|---|---|---|---|---|
| Pressure-treated | $9,000 | $10,000 - $20,000 (staining x13 cycles) | $4,500 (reboard at yr 12) | $23,500 - $33,500 |
| Cedar | $12,750 | $10,000 - $20,000 (staining x13 cycles) | $4,500 (reboard at yr 12) | $27,250 - $37,250 |
| Composite (Trex) | $17,000 | $500 - $1,000 (cleaning supplies) | None | $17,500 - $18,000 |
| PVC (AZEK) | $20,250 | $500 - $1,000 (cleaning supplies) | None | $20,750 - $21,250 |
Composite Deck Brands and What They Cost
These are the brands most commonly installed by Northeast deck contractors. Prices are installed costs per square foot in Westchester and Fairfield counties. Rockland and Putnam run 15 to 20 percent lower.
| Brand / Line | Material Cost per sqft | Installed per sqft | Warranty |
|---|---|---|---|
| Trex Enhance | $6 - $10 | $40 - $55 | 25 years (limited) |
| Trex Select | $9 - $12 | $45 - $60 | 25 years |
| Trex Transcend | $12 - $17 | $50 - $70 | 25 years |
| TimberTech PRO | $10 - $15 | $42 - $58 | 25 years |
| TimberTech AZEK (PVC) | $15 - $22 | $55 - $80 | 30 years |
| Fiberon Paramount | $8 - $14 | $40 - $57 | 25 years |
Which Deck Material Makes Sense for You
Choose pressure-treated wood if: You are building a deck on a home you plan to sell within 5 years and you want to maximize that ROI on a tight budget. A well-built wood deck adds real value to a listing without the composite price tag. Also choose wood if you genuinely enjoy doing your own maintenance and have the time to keep up with the staining schedule.
Choose composite if: You plan to stay in the home for 10 or more years, you do not want to deal with annual maintenance, or you want a deck that looks the same in year 15 as it did in year 1. The math is clear: composite costs less over 20 years in almost every scenario.
Choose PVC (AZEK) if: You want the best possible durability, the stiffest underfoot feel, and the longest warranty. PVC is also the right call if the deck will be in direct sun for most of the day, since it handles heat better than wood-fiber composites.
Deck footings in Westchester and Fairfield counties must extend below the frost line, which is 36 inches. Footings are typically poured to 42 inches to be safe. This applies to all deck types regardless of decking material. Do not let a contractor quote footings that are shallower than code requires. The frost heave in this region will crack or shift an under-dug footing within a few winters.
On timing: Fall is consistently the best season to schedule deck work in this area. Contractors are less busy than in spring, and some offer 10 to 15 percent discounts to keep crews working through October. Spring, particularly April and May, is peak demand and you may wait 6 to 8 weeks for an available crew.
Frequently Asked Questions
- Do composite decks get hot in the summer sun?
- Dark composite boards can reach 120 to 150 degrees in direct afternoon sun, noticeably hotter than bare feet can tolerate. Light or medium-toned boards and PVC products handle heat better. If your deck faces west and gets full afternoon sun, choose a lighter color or consider a shade structure.
- Can I use composite decking for the framing, not just the surface?
- No. Composite decking is an exterior surface material, not a structural framing product. The framing, joists, and posts are still built from pressure-treated lumber or steel, regardless of what decking surface you choose. Some contractors use hidden aluminum framing systems for longevity, but that is an upgrade, not a standard approach.
- How do you clean composite decking?
- For routine cleaning, a garden hose and a soft brush with a mild soap solution removes most dirt and pollen. For tougher stains like grease or tannin from leaves, composite deck cleaner products work well. Avoid pressure washing with a direct nozzle, which can damage the polymer surface. A fan tip at low pressure is fine.
- Does composite decking need to be sealed or stained?
- No. The polymer shell on composite decking is what protects it. Applying sealers or stains to composite can actually trap moisture under the coating and cause problems. The only maintenance composite needs is cleaning.
- Does a deck add value to a home in Westchester County?
- Yes. A well-built deck typically returns 60 to 80 percent of its cost at resale in the Northeast. A composite deck in good condition adds to buyer perception more than a worn or aging wood deck. The ROI calculation is not a reason to choose composite over wood on its own, but it is a factor if you are building specifically to improve resale value.
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Alex runs Trusted Local Contractors, connecting homeowners with vetted service professionals across the tri-state area. He compiled this guide after researching costs and options for the local market.