What is the total installed cost of a 500 square foot composite deck in NB?

A 500 square foot composite deck in New Brunswick typically costs between $22,500 and $37,500 fully installed, depending on the composite brand, railing style, and site complexity.

For a deck this size, you're looking at mid-range composite materials (like Trex Enhance or TimberTech Edge) running $45-65 per square foot installed, while premium composite options (Trex Transcend, TimberTech Pro) will be $60-75 per square foot. The wide price range reflects significant differences in material quality, warranty coverage, and installation complexity.

Breaking down the costs for your 500 sq ft deck:

• Decking and framing: $18,000-$28,000 (this includes pressure-treated framing, composite boards, fasteners, and basic installation)


• Railings: $2,000-$5,000 depending on linear footage and style (composite railings run $40-80 per linear foot)


• Stairs: $800-$1,500 for a standard 3-4 step staircase


• Permits and inspections: $150-$300 in most NB municipalities


• Site preparation: $500-$2,000 if excavation or grading is needed

New Brunswick-specific factors affecting your cost include our deep frost requirements — footings must extend 1.2 metres deep in southern NB (Moncton, Saint John, Fredericton) or 1.5 metres in northern regions (Bathurst, Edmundston). This adds to excavation and concrete costs compared to other provinces. Our Maritime humidity also makes composite an excellent investment here, as you'll never need the annual $600-$1,200 staining costs that pressure-treated decks require.

Timing matters significantly for a project this size. Book your contractor by March or April for summer installation, as the prime building season (June through August) fills up quickly. Composite installation can happen through October, but concrete footings need consistent temperatures above 10°C for proper curing.

Consider these cost variables: A simple rectangular deck on level ground hits the lower end of the range, while multi-level designs, challenging access, or premium features like built-in benches or pergolas can push costs toward the upper end. Adding a hot tub pad or structural reinforcement adds another $1,500-$3,000.

For a deck this size and investment level, definitely hire a professional. The structural engineering, proper footing depth, and ledger board attachment are critical for safety and longevity in New Brunswick's challenging climate.

Need help finding a qualified deck builder? New Brunswick Decks can match you with local contractors for free estimates on your 500 square foot composite deck project.