What every common deck add-on actually costs in 2026

Deck with pergola

PT

$11,950 – $22,100

Cedar

$15,050 – $26,500

Composite

$17,100 – $30,950

PVC

$20,250 – $36,450

A pergola is the single most popular deck upgrade in the GTA. It pulls shade onto the deck during the worst of the July sun, anchors a dining zone visually, and reads as a real architectural element rather than an add-on. Pricing varies wildly because the word covers everything from a $2,400 cedar four-poster to a $6,500 powder-coated aluminum kit with louvres.

Deck with hot tub

Adding a hot tub to a deck is a structural conversation before it's an aesthetic one. A loaded 6-person tub weighs 4,500–6,000 lb fully filled; a standard joist-on-beam deck designed for a 50 lb/sq ft live load needs engineered reinforcement — doubled joists, a poured concrete pad below, or a separate sleeper deck that carries the tub directly to grade. Costs below are the additional spend on top of the base deck.

Multi-level deck

PT

$10,100 – $16,900

Cedar

$13,500 – $21,900

Composite

$15,750 – $26,900

PVC

$19,150 – $33,150

Multi-level (two-tier or terraced) decks solve a specific problem: a sloped lot, or a kitchen-walkout that's 4–6 ft above the natural grade. Splitting the deck into a smaller upper landing and a larger lower entertaining surface lets each tier do one job well, and it triggers tier-2 framing pricing in the calculator (4–8 ft off grade adds 18–30% to material+labor versus a single-level ground build).

Built-in deck lighting

PT

$10,150 – $17,800

Cedar

$13,250 – $22,200

Composite

$15,300 – $26,650

PVC

$18,450 – $32,150

Built-in lighting is the highest-perceived-value, lowest-relative-cost upgrade you can add to a deck. A handful of stair lights, post-cap LEDs, and a low-voltage transformer turns a deck from a daytime amenity into an evening room. The wiring has to be roughed in during framing — retrofitting after the fact roughly doubles the cost.

Deck with built-in seating

PT

$10,350 – $18,000

Cedar

$13,450 – $22,400

Composite

$15,500 – $26,850

PVC

$18,650 – $32,350

Built-in bench seating along one edge of the deck does two things at once: it provides additional seating without consuming usable floor area, and it doubles as a code-compliant guardrail on tiers below 36″ (the bench backrest, if framed correctly, can replace a railing run). Most cost-effective when designed during framing rather than added later.

Deck with built-in planters

PT

$9,950 – $16,800

Cedar

$13,050 – $21,200

Composite

$15,100 – $25,650

PVC

$18,250 – $31,150

Built-in planters integrate into the deck framing as boxes lined with cedar or composite skirt boards. Each box gets a waterproof liner, a drainage path that ties into the deck's slope, and either a soil chamber or an insert for potted plants. Less common than other upgrades but high-impact on smaller urban decks where ground-level planting isn't possible.