What does a covered deck cost per square foot?
Price the deck and the cover separately, because they are two structures that share posts. The deck follows the usual material ranges. The cover is the least standardized line in deck pricing: an open pergola, a solid roof tied into the house and a louvered system are three different products. Fixr's January 2023 page gives $40–$100 per square foot for a covered deck overall, a wide range that reflects exactly that spread.
| Part | Published figure | Source | Note |
|---|---|---|---|
| Covered deck, overall | $40–$100 per sq ft | Fixr, Jan 2023 (national) | Deck plus cover together |
| Deck platform, treated pine | $25–$40 per sq ft | 2026 market ranges | 300 sq ft raised: $7,000–$13,500 |
| Deck platform, composite | $40–$62 per sq ft | 2026 market ranges | 300 sq ft raised: $11,000–$21,000 |
| Solid roof cover | Priced at site visit | Not in our cost model yet | Depends on span, snow load and tie-in |
| Open pergola | Priced at site visit | Not in our cost model yet | Fewer, lighter members; no roof sheathing |
For scale, Fixr's overall range applied to a 300-square-foot covered deck is $12,000–$30,000 at 2023 prices. That is a national figure and predates recent lumber and labor increases, so use it to sanity-check bids rather than set a budget.
Pergola, solid roof or louvered: how cover type sets the price
The more weather the cover keeps out, the more it costs and the more structure it needs. A pergola filters sun; a solid roof sheds rain and carries snow; a louvered system does both but is an engineered product with a motor or crank.
| Cover type | Shade and weather | Structure needed | Main cost drivers |
|---|---|---|---|
| Open pergola | Partial shade; rain and snow pass through | Posts, beams and rafters or slats | Lumber species, spacing of slats, post count |
| Pergola with shade fabric or slats | More shade; little rain protection | As above plus attachment hardware | Fabric or slat product, wind exposure |
| Solid roof tied to the house | Full shade and rain cover; holds snow | Beams, rafters, sheathing and a roof finish sized for snow | Tie-in at the existing roof line, flashing, span |
| Freestanding solid roof | Full cover away from the house | Its own posts and footings on every side | More footings, bracing for wind |
| Louvered aluminum system | Adjustable shade; closes against rain | Engineered frame to the maker's specs | Product cost, motor, electrical |
A solid cover also needs a plan for water: a gutter and downspout on the low edge of the cover keep runoff from sheeting onto the deck and the steps. For design examples, see our covered deck ideas.
What structure does a Boise deck cover need?
A cover that holds snow is a roof, and the code treats it like one. Boise's design criteria set a 20 psf ground snow load with a 25 psf minimum roof snow load, a 24-inch frost depth and a 90 mph design wind speed. Star lists 115 mph. Those numbers size the beams, rafters, post connections and footings.
- Footings: cover posts carry roof load down to the ground, so they usually get their own footings sized for that load, below the 24-inch frost line.
- Beams and rafters: spans are set by the roof snow load. A wide cover with few posts needs deeper beams, which cost more than adding a post.
- Uplift: open covers catch wind from below. Post bases and rafter ties are designed for uplift, especially in Star's higher wind zone.
- House tie-in: attaching to the house means flashing at the wall or tying into the existing roof line, which is often the most labor-intensive part.
- Electrical: fans, lights and heaters need wiring, usually under a separate electrical permit.
Boise averages 17.6 inches of snow a year, mostly December through February. That is modest, but snow slides off a pitched cover onto the deck edge and stairs, and drifts build against walls. The snow load guide explains how the numbers translate into framing.
Permits and approvals for covered decks
Expect a permit for almost any solid cover. Boise's residential permit brochure lists constructing or adding a patio cover as permitted work, separate from the 12-inch deck rule, so even a cover over a ground-level deck can need one.
- Boise: patio covers need a building permit; decks need one above 12 inches. Combine both in one submittal when you build together.
- Meridian: shade structures and decks that are attached to the house, over 200 square feet or more than one story need a permit. Meridian also publishes a residential patio cover checklist; ask the building division for the current version.
- Nampa: decks above 12 inches need a permit; ask about the cover at the same time.
- HOA: architectural committees often require the cover's roof finish and color to match the house. Third-party guides put HOA review at one to six weeks.
- Foothills wildfire overlay: Boise's IR1 area applies ignition-resistant construction rules to new structures and additions. Confirm with Boise Fire how they apply to your cover and deck materials.
Jurisdiction details are on the Boise deck permit page and Meridian deck permit page.
Is a covered deck worth it in Boise?
For many south- and west-facing decks, the cover is what makes the deck usable in July. Boise's July average high is 92.7°F and the city averages about 55 days a year at 90°F or hotter (NOAA 1991–2020 normals). Shade also keeps composite boards from heating up, protects wood finishes from UV and keeps light snow off the walking surface.
We have not found a published regional resale figure for covered decks. The Cost vs. Value numbers quoted in our Boise deck cost guide are for uncovered deck additions, so treat a cover as a use-and-comfort investment first. Our guide to decking for full sun covers the board side of the heat problem.
Covered deck quote checklist
- Cover type, size and roof pitch stated, with the roof finish named.
- Design snow load and wind speed on the drawings (25 psf roof minimum in Boise).
- Beam and rafter sizes, post count and footing size and depth.
- How the cover attaches to the house, and who flashes it.
- Drainage: gutter, downspout and where the water goes.
- Ceiling finish, lighting and fan wiring, and whether a licensed electrician is included.
- Permit scope covering both deck and cover, plus HOA submittal.
The deck cost calculator prices the deck platform and lists a solid roof cover and pergola as items priced at the site visit. Start there for the deck, then see covered decks and pergolas for what the cover side involves.
Run your own numbers with the deck cost calculator.
Frequently asked questions
- Do you need a permit for a freestanding pergola in the Treasure Valley?
- Often, yes. Meridian counts pergolas as accessory structures and requires a permit when they are attached, over 200 square feet or more than one story. Boise's brochure lists patio covers as permitted work; ask the city whether your open pergola design counts. Setbacks and HOA approval apply regardless of the permit answer.
- Can a deck cover hold snow in Boise?
- A solid cover has to. Boise's design criteria require a minimum roof snow load of 25 psf, and the beams, rafters, posts and footings are sized to it. Open pergolas let most snow fall through, but slats and shade fabric can hold some, so remove fabric for winter if the maker recommends it.
- Is a pergola cheaper than a solid roof cover?
- Usually. A pergola has no sheathing, roof finish, flashing or drainage, and its members carry less load. A solid roof adds all of those, plus the house tie-in. A heavy timber pergola with many posts can still cost more than a small shed-roof cover, so compare like-sized designs.
- Can I add a cover to my existing deck?
- Sometimes. An existing deck frame is rarely designed for roof loads, so cover posts usually need their own footings rather than sitting on the deck framing. The deck may need reinforcement where posts pass through. An inspection of the frame and footings comes before any cover design.
- Does a cover make a composite deck cooler?
- Yes. Shade is the most reliable way to keep any deck surface comfortable, because heat comes mostly from direct sun. Manufacturers' heat-reducing boards help, but both Trex and TimberTech note that their decking still gets hot in direct sun. A cover on the afternoon side does more than a board upgrade alone.
- How much shade does an open pergola give?
- Less than many people expect at midday. Open rafters and slats cast striped shade that moves with the sun, and in summer the sun is high enough that much of it reaches the deck. Closer slat spacing, slats set on edge, shade fabric or a climbing vine add coverage. For full shade in July, a solid or louvered cover is the dependable option.
Sources
- Fixr — Cost to Build a Deck (updated January 2023)
- City of Boise — Current codes and design criteria (frost depth, snow load, wind)
- City of Boise — Residential construction permit brochure
- City of Meridian — Residential detached accessory structures handout
- City of Boise — Wildland-Urban Interface overlay
- NOAA NCEI U.S. Climate Normals 1991–2020, Boise Air Terminal (USW00024131)
- HomeGuide — Composite decking prices (2026)
Last reviewed .