Decks and Porches Cost in Mercer Island, WA in 2026
Most Decks and Porches projects in Mercer Island, WA cost between $8,000 and $27,000. The typical price is $14,500.
Labour and materials in Mercer Island run about 11% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Pressure-treated pine versus composite versus hardwood
- Height off the ground and stair count
- Railing material
- Footing depth required by frost line
Usually included
- Footings, framing and decking
- Railings and stairs
- Fasteners and flashing at the ledger
Usually extra
- Permits
- Under-deck drainage
- Built-in seating or pergola
Unit prices in Mercer Island, WA
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $27 |
| Mid-range | $48 |
| High-end | $91 |
Deck builders in Mercer Island, WA
Businesses listed on Google near Mercer Island, WA. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Optima Fence and Deck
4.9(278 reviews)
9725 SE 36th St #301, Mercer Island, WA 98040
Intercrus Decks LLC
5.0(106 reviews)
545 28th Ave, Seattle, WA 98122
Mercer Island Remodeling
5.0(20 reviews)
8812 SE 59th St, Mercer Island, WA 98040
Legacy Decking - Bellevue
5.0(16 reviews)
10900 NE 4th St Unit 2300, Bellevue, WA 98004
Bayside Home Builders - Seattle
5.0(15 reviews)
2630 77th Ave SE Ste 247, Mercer Island, WA 98040
Gibson Fence and Deck
5.0(10 reviews)
9725 SE 36th St #115, Mercer Island, WA 98040