Decks and Patios in Bellevue, WA
A composite deck in Bellevue costs $65 to $115 per square foot at ground level, and elevated hillside decks $100 to $190 per square foot. Bellevue homeowners increasingly build full outdoor rooms — a deck or patio with a roof, heaters, lighting and somewhere to cook — which put covered patios at $100 to $190 per square foot.
Bellevue deck and patio costs
| Project | Typical Bellevue range | Where it fits |
|---|---|---|
| Ground-level composite deck | $65 – $115 per sq ft | Flat lots in central Bellevue |
| Elevated deck off a main floor | $100 – $190 per sq ft | Somerset, Newport Hills, Cougar Mountain |
| Covered patio with heaters and lights | $100 – $190 per sq ft | Outdoor rooms off kitchens |
| Paver patio with fire feature | $30 – $60 per sq ft | Flat back yards |
| Glass railing on a view deck | $280 – $450 per linear ft | Hillside homes |
Bellevue lots and outdoor projects
Hillside neighborhoods put the main floor of daylight-basement and split-level homes a full story above the yard. Decks there are elevated structures with tall posts, bracing and engineered footings, and the space below can become a covered patio with under-deck drainage.
Flat central neighborhoods suit ground-level decks and paver patios, often paired with a covered section near the door.
Large lots in Bridle Trails and Northeast Bellevue have room for freestanding pavilions and outdoor kitchens away from the house.
Bellevue deck rules
Raised decks, attached decks, roofed structures and decks with hot tubs need permits through MyBuildingPermit. Steep-slope and landslide hazard areas on the southern and eastern hills may require geotechnical input for footings. Roofed structures count toward lot coverage, and significant trees limit footing locations. HOAs often have their own approvals.
Bellevue views and railings
On view decks, the railing decides what you see from a chair. Glass panel and cable railings keep views open; whatever the style, posts on elevated decks must be attached with hardware that resists the code's outward load.
Bellevue deck and patio questions
Can I make the space under my hillside deck usable?
Yes, with an under-deck drainage system that keeps it dry, turning it into a covered patio.
Does a covered patio count toward lot coverage?
Generally yes. On lots near the limit, an open pergola may be allowed where a roof is not.
Do I need an engineer for my elevated deck?
For tall decks and decks on steep slopes, engineering is usually required and always wise.
What heaters work on a covered patio?
Ceiling-mounted infrared electric heaters on dedicated circuits work best outdoors.