Cost Guide · Updated July 2026
How much does a deck cost in Montgomery County, PA?
Short answer: most Montgomery County decks cost between about $5,000 and $18,000 in 2026, and the two biggest levers are size and material. Here is how that breaks down—and what makes one quote thousands more than another.
Deck cost per square foot in 2026
In the Philadelphia suburbs, installed deck cost is usually quoted per square foot, all-in (materials plus labor). These are typical 2026 ranges for our area:
| Material | Installed, per sq ft |
|---|---|
| Pressure-treated wood | $22–$42 |
| Mid-range composite | $36–$55 |
| Premium composite | $50–$70 |
Estimated total cost by deck size
Multiply those rates by deck area and you get a working budget. Representative 2026 ranges for common sizes:
| Deck size | Pressure-treated | Mid composite | Premium composite |
|---|---|---|---|
| 12 × 12 (144 sq ft) | $3,200–$6,000 | $5,200–$8,000 | $7,200–$10,000 |
| 12 × 16 (192 sq ft) | $4,200–$8,000 | $7,000–$10,500 | $9,600–$13,400 |
| 16 × 20 (320 sq ft) | $7,000–$13,500 | $11,500–$17,600 | $16,000–$22,400 |
Estimates for planning only, based on 2026 regional per-square-foot ranges from industry cost guides and manufacturer calculators. Your actual price comes from a builder's on-site measurement. Verified July 2026.
What actually moves the price
Square footage and material set the baseline, but these factors are why two quotes for the same-sounding deck can be thousands apart:
- Deck height. A deck a few steps off the ground is far cheaper than a second-story deck that needs taller posts, deeper footings, and more railing.
- Stairs. Each flight adds framing, treads, and railing. A tall deck with a long stair run adds up quickly.
- Railing choice. Standard aluminum is the value option; cable and glass cost more per linear foot.
- Tearing out an old deck. Demolition and disposal of an existing deck is a line item many homeowners forget.
- Site conditions. Sloped or hard-to-reach yards, tricky footings, and access all affect labor.
- Permit fees. Set by your municipality, not the county—usually a modest line item, but it varies. See our permit guide.
How to compare quotes fairly
A cheaper quote is not automatically a better deal—it is often a different deck. Before you compare, make sure every builder is pricing the same size, material, railing, stair count, and demolition scope. The easiest way to get apples-to-apples quotes is to show each builder the same picture of what you want.
That is exactly what the visualizer is for: preview the deck on your own house, lock in the size, finish, and railing you actually want, then ask builders to price that. It turns a vague "we want a deck" into a specific request.
Price the deck you actually want
See the size and finish on your own house first, then get quotes on a specific plan instead of a guess.
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