How much should I budget for a 20x20 Trex deck in Moncton NB?

You should budget $18,000 to $30,000 for a 20x20 Trex deck in Moncton, with the final cost depending on which Trex product line you choose, your railing selection, site conditions, and the complexity of the design. A 400-square-foot deck is a substantial outdoor living space, roughly the size of a large bedroom, and at this scale every dollar-per-square-foot difference in materials adds up quickly.

Trex offers several product lines at different price points, and the line you choose is the single biggest factor in where you land within that $18,000 to $30,000 range. Trex Enhance, their entry-level capped composite, sits at the lower end of the composite pricing spectrum and would put a 20x20 deck closer to the $18,000 to $22,000 range installed. Trex Select occupies the middle ground at roughly $22,000 to $26,000, while Trex Transcend, their premium line with the deepest wood-grain textures and broadest colour selection, pushes toward $26,000 to $30,000. All three lines use the same basic technology of a protective polymer shell over a composite core, but the premium lines offer richer aesthetics, better fade resistance, and longer warranty terms.

The substructure beneath your Trex boards will be pressure-treated lumber regardless of which Trex line you choose. For a 20x20 deck, the framing package including posts, beams, joists, blocking, and ledger board typically runs $3,000 to $5,000 in materials. The footings for a deck this size require careful planning. You will need approximately nine to twelve footings depending on beam spans and joist sizing, at $150 to $350 each, adding $1,350 to $4,200 to the project. In Moncton, footings must extend below the frost line at approximately 4 feet deep.

Railings are often an underestimated cost on a deck this size. A 20x20 deck has roughly 50 to 56 linear feet of railing perimeter after accounting for the house wall and stair openings. Trex offers their own railing systems that pair aesthetically with their decking, but you have options at every price point. Wood railings at $30 to $60 per linear foot add $1,500 to $3,360. Trex or other aluminum railings at $50 to $100 per linear foot add $2,500 to $5,600. Glass panel railings at $100 to $200 per linear foot would add $5,000 to $11,200, though glass at the upper end would push your total well beyond the $30,000 budget. Most Moncton homeowners building a Trex deck at this scale choose a mid-range aluminum or composite railing in the $60 to $80 per linear foot range.

Labour for a 20x20 Trex deck in Moncton runs $25 to $45 per hour, and a project this size takes a two to three person crew approximately five to eight working days. Labour will represent 40 to 60 percent of your total cost, which is consistent across all decking materials in the New Brunswick market. Trex installation requires attention to the manufacturer's specifications for fastening, gapping, and ventilation beneath the boards, and experienced composite deck installers will follow these requirements precisely to maintain your warranty coverage.

If you are considering design upgrades, here is how they affect the budget. Adding a second level to create a multi-level deck increases the total cost by 20 to 30 percent, pushing the upper range to $36,000 or more. Built-in deck lighting runs $500 to $3,000 depending on the number of fixtures and whether you choose riser lights, post cap lights, or recessed rail lighting. A picture-frame border using a contrasting Trex colour adds modest material cost but increases labour time. Built-in bench seating, planter boxes, and pergola attachments are all additional costs that should be quoted separately from the base deck price.

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