A backyard pavilion is a permanent, open-sided structure with a real roof — rafters, sheathing, shingles or metal — standing on its own posts and footings. In Kansas City, a professionally built cedar or Douglas-fir pavilion runs roughly $30,000–$60,000 for most projects, needs a building permit in most cities once it passes 120 or 200 square feet, and sits on footings that reach 36 inches below grade almost everywhere in the metro. This guide walks through every decision we work through with homeowners before a shovel goes in: what it costs and why, kit versus custom, how big, what holds it up, what your city requires, what it's made of, how to power it, and what the build looks like week by week.
What counts as a pavilion — and what doesn't?
A pavilion has a solid roof and open sides and stands on its own. A pergola has an open lattice top and gives shade, not shelter. A gazebo is usually an octagonal or closed-rail version of a pavilion. An attached patio cover or porch roof ties into the house. The distinction matters for two practical reasons: rain and permits. Overland Park's own permit rules define the exempt "pergola" as a structure at least 50 percent open at the top with members no wider than 2 inches that cannot hold snow or ice — anything with a real roof is treated as a building (Overland Park permits page, accessed 2026-09-30). Lenexa requires a permit for anything attached to the house regardless of size (Lenexa: Decks, Fences, Sheds, accessed 2026-09-30).
| Structure | Rain protection | Shade | Own footings? | Typical KC price band | Permit treatment |
|---|---|---|---|---|---|
| Pavilion (freestanding, solid roof) | Full | Full | Yes, frost-depth | $30K–$60K typical; from ~$15K | Building permit above the city's size threshold; zoning always |
| Pergola (open lattice) | None | Partial | Usually light piers | ~$5K–$15K wood; $10K–$25K vinyl; $15K–$30K+ louvered | Often exempt if truly open (Overland Park's 50%-open rule) |
| Gazebo (kit or custom, closed rail) | Full | Full | Yes | Kits $2K–$7K; custom similar to pavilion | Same as pavilion |
| Attached patio cover / porch roof | Full | Full | Ledger to house + posts | Roughly $40K–$55K for a covered deck; screened porches $55K–$80K (Kansas City builders' published ranges) | Always a permit (Lenexa); house setbacks apply |
This site is about the first row. We mention the others only so you pick the right one. If what you want is a covered space attached to the house, read pavilion vs pergola vs covered patio before you go further.
What does a pavilion cost in Kansas City?
Our pavilions start around $15,000 and most builds land between $30,000 and $60,000, with premium builds reaching about $90,000. A real example: a 16×20 cedar pavilion with a shingled roof, tongue-and-groove ceiling, stone-wrapped piers, one ceiling fan, recessed lights and a TV rough-in priced at $59,950. That works out to about $187 per square foot — and if you have been reading national cost guides, that number will look wrong. HomeGuide's pavilion guide says $35–$60 per square foot installed on an existing foundation (HomeGuide, updated Feb 2026). The difference is not a markup mystery: frost-depth piers, a shingle roof over sheathing and underlayment, a finished ceiling, cedar instead of treated pine, haul-off, permit drawings and Kansas City labor are all missing from that $35–$60.
| Size | Big-box cedar/steel-roof kit, assembled | Shipped timber kit, built locally | Custom cedar/fir build (our range) |
|---|---|---|---|
| 12×16 | ~$4,500–$7,000 (16×12 kit) | ~$18,000–$40,000 | $24,500–$39,500 |
| 16×20 | ~$5,000–$9,500 (nearest kit sizes) | $32,500–$50,000 | $37,000–$59,000 |
| 20×24 | not sold at this size by most kit makers | ~$45,000–$80,000 | $53,000–$84,000 |
These are planning ranges from our cost model (v0.1), not quotes; the custom column includes shingles, ceiling and standard piers but not electrical, stone columns or site work. The full line-item breakdown, the worked examples and what moves a quote are in how much a pavilion costs in Kansas City, and you can run your own numbers in the Instant Estimate.
Kit, shipped timber kit, or custom build?
There are three ways to end up with a pavilion in your yard, and they are not three price points on one product — they are three different projects with different people responsible for the footings, the roof, the permit and the warranty.
| Big-box kit (cedar + steel roof) | Shipped timber-frame / Amish kit | Custom build | |
|---|---|---|---|
| What arrives | Boxed kit, curbside; assembly not included | Pre-cut timbers, freight; roofing often excluded; 5–8-week lead | A crew, lumber and a design |
| Footings | Your problem; manuals call for a level concrete surface or post pads | Your problem; 36-in piers in KC | Included |
| Roof | Steel panels in the kit | Sometimes excluded (source shingles locally) | Shingles matched to your house, over sheathing |
| Permit | Yours, if over the threshold | Yours; engineered drawings sometimes required | Handled with you |
| Warranty | 1–5 years on materials | Varies by maker | Ask every builder — get it in writing |
| Who assembles | You, or a handyman ($600–$2,000) | A local contractor ($2,500–$8,000) | The builder's crew |
Kits are not "temporary structures." A bolted-down cedar gazebo is still an accessory structure to every city in the metro. The full comparison, including what a kit actually costs once it is footed, roofed and permitted here, is in pavilion kits vs custom-built.
How big should it be?
Size the pavilion from the furniture in, not the yard out. A six-seat outdoor dining table is 72–84 inches long; leave 36 inches behind chairs to pull out and 42–48 inches where people walk behind seated guests; an L-shaped sectional is about 89×89 inches; walkways narrower than 36 inches force people to turn sideways (Outer dining-table guide and layout guide, accessed 2026-09-30).
| Footprint | What fits |
|---|---|
| 12×12 | One zone: a four-top dining set or a small lounge — not both |
| 12×16 / 14×16 | Six-seat dining with a walkway, or a sectional and coffee table |
| 14×20 / 16×20 | Dining for six to eight plus a lounge zone — the most common custom size |
| 16×24 / 20×20 | Dining for eight, a sectional and a grill run |
| 20×24 and up | A kitchen run, dining and lounge; check your city's size caps first |
Height matters too: plan eaves at 8 feet or more if you want a ceiling fan, and know that Kansas City, Missouri caps accessory structures at 10 feet tall, while Olathe allows 25 feet to the ridge. The size and layout guide has the furniture math and lot-fit examples by city.
Will it fit your lot? Setbacks, height and easements
Every city in the metro regulates where an accessory structure can sit, and the rules apply even when no building permit is required. Kansas City, Missouri's zoning code says it plainly: accessory buildings and structures must be at least 1.5 feet from rear and interior side property lines, 10 feet from every other building on the lot, never in front of the house, and no taller than 10 feet (KCMO Code 88-305, accessed 2026-09-30). Lenexa's R-1 rule is the opposite shape: a structure over 200 square feet or 10 feet tall needs 20 feet from the rear line and 7 feet from the side (Lenexa accessory structure guide, accessed 2026-09-30). Olathe and Shawnee prohibit building in drainage or utility easements at all (Olathe UDO 18.50.060; Shawnee accessory building guidelines, accessed 2026-09-30). Pull your plat before you fall in love with a spot.
| City | Rear / side setback for a detached pavilion | Height cap | Distance from house |
|---|---|---|---|
| Kansas City, MO | 1.5 ft / 1.5 ft | 10 ft | 10 ft |
| Overland Park (R-1/RP-1) | in the rear setback, ≥3 ft from interior lines; ≥20 ft from a street | 20 ft, not taller than the house | — |
| Olathe | 5 ft / 5 ft (15 ft on a corner) | 25 ft to the ridge | 10 ft |
| Lenexa (R-1) | ≤200 sq ft & <10 ft tall: 5 / 5; larger: 20 / 7 | 25 ft | — |
| Shawnee | ≤250 sq ft: 5 / 5 and outside easements; larger: district setbacks | not published in the guideline | 5 ft |
| Lee's Summit | 10 ft / 10 ft (front prohibited) | 15 ft to the roof peak | within 10 ft of the house → house setbacks apply |
Sources and the full 13-jurisdiction matrix are on the permits page.
Do you need a permit — and what else applies even if you don't?
Most Kansas City–area cities exempt small detached accessory structures from a building permit, but they draw the line in two different places. Kansas City, Missouri, Jackson County, Overland Park, Olathe and unincorporated Johnson County use 200 square feet. Lee's Summit, Parkville, Lenexa and Shawnee use 120 square feet. Liberty, Clay County and Platte County publish no exemption at all. A 12×16 pavilion (192 square feet) is exempt in the first group and permitted in the second; a 16×20 (320 square feet) needs a permit everywhere.
Three things apply regardless of the building permit. Zoning setbacks and height caps always apply — Kansas City, Missouri says so on its own permit FAQ, and Johnson County states that "any structure regardless of size has setback requirements" (KCMO code questions; Johnson County building permits, accessed 2026-09-30). Electrical is its own permit; Overland Park requires one for any branch-circuit work. And your HOA's architectural review is private, separate, and usually first. We provide the drawings and material specs that architectural committees ask for, and we walk you through your city's permit — the city-by-city rules, fees, review times and the office to call are on the permits page.
What holds it up: footings, slabs and your existing patio
Wherever a Kansas City–area city publishes a frost line, it is 36 inches: Kansas City, Missouri (by ordinance), Olathe (Table R301.2), Parkville, Clay County, and Kansas City, Kansas. Footings have to reach below it, which is why a KC pavilion's posts stand on piers three feet deep. A 4-inch patio slab is not a footing. It has no depth below frost, it was not poured to carry concentrated post loads, and a solid roof adds wind uplift a slab was never asked to resist. Light steel-roof kits can be anchored to a sound slab because their makers designed for it; a timber pavilion with a shingled roof cannot.
Some cities relieve small structures: Lenexa waives frost-depth footings for detached accessory buildings of 600 square feet or less; Shawnee requires the 36-inch depth only above 400 square feet; a Johnson County foundation guideline allows 12-inch footings for freestanding accessory structures up to 600 square feet with eaves no taller than 10 feet (that guideline cites an older code edition — we confirm it with each city before relying on it). Relief applies to the permit, not to physics; a contractor may still put a pavilion on deep piers. If you already have a patio, there are three honest paths — cut pier locations through the slab, set piers beside it, or replace it — and we assess which one your slab supports. Read can you build a pavilion on an existing patio? before you assume either answer.
Materials and roof: what lasts in Kansas City weather
Kansas City averages 40 to 60 thunderstorm days a year; a storm is "severe" at ¾-inch hail or 58-mph wind, and straight-line winds over 100 mph happen (PrepareMetroKC, accessed 2026-09-30). Olathe's and Kansas City, Missouri's building tables set the design wind speed at 115 mph and the ground snow load at 20 psf, and Olathe requires an ice-barrier underlayment. Design for that, not for the brochure.
Wood. Our pavilions are built in cedar or Douglas fir on 8×8 posts with 4×12 beams. Cedar is dimensionally stable and naturally decay-resistant; Douglas fir resists checking and stays straight but needs a finish; pressure-treated pine is the budget option and is prone to warping and twisting as it dries. Large timbers check as they dry — surface cracks along the grain that look alarming and are very rarely structural. Posts never sit in soil or on bare concrete; they stand on bases that keep the end grain off the slab.
Roof. Architectural shingles matched to your house are our standard: they need at least a 2:12 slope with enhanced underlayment (4:12 is normal), and they are quiet. Standing-seam metal is the upgrade — it works to a 1:12 slope per manufacturer and costs roughly $5–$10 more per square foot of roof than shingles. Exposed-fastener metal screwed to open purlins is the one to avoid over a space you sit in: it is loud in rain and drips condensation on cold mornings unless there is sheathing, underlayment and a ceiling below it. Every roof we build has a tongue-and-groove ceiling under it, which is why the shingle-versus-metal decision is mostly about looks and budget.
Finish. Two coats of a penetrating stain last longer than one, and unfinished cedar goes grey and blotchy in a climate like ours. Plan to refresh a semi-transparent stain every few years; the kit makers put it more bluntly — seal once or twice a year — and make maintenance a condition of the warranty.
Power, light and fans
Almost everyone wants a fan, lights and an outlet or two; plan them before the concrete is poured so conduit can run under the slab or to the piers. A detached structure gets one feeder or branch circuit with a disconnect where it enters, outdoor receptacles are GFCI-protected, and buried cable or conduit has code-required depths. Fixtures and fans under a deep roof can be damp-rated; anything near an open edge where rain blows in should be wet-rated. Electrical is a separate permit and, in most cities, a licensed electrician's work; nationally, running power to a detached structure costs roughly $1,000–$3,800 depending on distance, a wired ceiling fan $400–$1,000, and lighting $200–$1,000 (Angi, run electricity to a detached structure, accessed 2026-09-30). We price these as separate lines so you can see them.
What happens, in what order, and how long it takes
- Free 30-minute on-site design meeting. We measure, look at the slab and the access, and talk through size, roof and features.
- Written design and fixed price. The price you sign for is the price you pay — no upcharges at the end.
- HOA / architectural review. We provide the drawings and material specs.
- Building permit (if your size requires it) and the electrical permit. Review times published by the cities: Kansas City, Missouri seven days for residential review; Johnson County seven to ten business days; Platte County five working days.
- Footings. Piers dug and poured; the footing inspection happens before the posts go up. Concrete below 40 °F needs cold-weather measures, which is one reason spring fills fast.
- Frame, roof, ceiling. One to two weeks on site.
- Electrical rough-in and finish, final inspection, stain.
Signing to finished typically runs six to ten weeks. Spring is the busiest season for every outdoor builder in the metro; if you want an early-summer pavilion, book before spring.
HOA
Permit
Footings / inspection
Frame
Roof / ceiling
Electrical
Final
Stain
Read in numbered order. Electrical planning begins before concrete; required inspections and scheduling depend on the project and jurisdiction.
Text alternative: HOA → permit → footings/inspection → frame → roof/ceiling → electrical → final → stain.
How to compare bids
Three pavilion quotes almost never describe the same project. Before you compare totals, line them up: number and depth of piers; roof material and whether there is sheathing, underlayment and an ice barrier; ceiling; overhang; stain; who pulls the building permit and the electrical permit; drawings and any engineering; haul-off; warranty terms; payment schedule; and the exclusions list. Our quote-comparison worksheet is built for exactly that, and the project-readiness checklist tells you what to have in hand before you ask anyone for a number.
Frequently asked questions
Is a bolted-down kit a "non-permanent" structure that doesn't need a permit? No. Every metro city treats a roofed structure on footings or anchors as an accessory structure. Size determines whether a building permit is needed; zoning applies either way.
How far from the house should a detached pavilion sit? Far enough to keep daylight in the room behind it — one homeowner who set a 14×14 pavilion 12 feet off the family room reported plenty of light. Olathe, Parkville, Liberty and Kansas City, Missouri require at least 10 feet between buildings on a lot, and Lee's Summit applies the house's own setbacks to anything within 10 feet of it.
Can my HOA say no? Yes. Architectural review is a private contract you agreed to when you bought the house. Submit early, with drawings.
Do I need engineered drawings? Sometimes. Shawnee requires a Kansas engineer's seal only for trusses and post-frame construction; Olathe's residential permit guide lists "sealed construction documents" for accessory structures; Parkville's guidelines call for sealed plans. Timber kit makers usually quote engineering separately. Budget $500–$1,500 when it applies.
Will a metal roof be loud? Only the exposed-fastener kind over open purlins. Standing seam or shingles over sheathing with a tongue-and-groove ceiling is quiet.
Should the grill go under the roof? Gas grills and kamados are usually fine with clearance and a hood or open edge; wood-burning fire features need 6–7 feet of clearance and are often better just outside the eave.
How much contingency should I hold? Ten to fifteen percent of the priced scope is the rule of thumb builders use; site surprises under a slab and electrical distance are the usual reasons it gets spent.
Last updated: September 30, 2026. Sources are linked where each fact appears; permit and code facts were read on the official city, county and code pages on that date. Prices are planning ranges from our cost model v0.1 and our published pricing.
Ready to get a quote?
- Custom cedar and Douglas-fir pavilions — have our crew build a custom pavilion to your design.
- Timber-frame pavilions — heavy-timber pavilions, custom or from a kit we install.
- Pavilion kit installation — we install the kit you buy, properly footed and permitted.
- Instant Estimate — a planning range for your size, site and options before you talk to anyone.