Lee's Summit exempts a one-story detached accessory structure from a building permit only if its floor area "does not exceed one hundred twenty (120) square feet," so nearly every pavilion needs one. The Unified Development Ordinance's accessory-structure table treats a detached gazebo or covered structure the same way: prohibited in the front yard, 10 feet from side and rear lines, and no taller than 15 feet measured to the highest point of the roof. If it sits within 10 feet of the house it must meet the house's own setbacks instead. And the timing matters this fall: permits applied for on or after October 1, 2026 are reviewed under the 2024 International Residential Code and the 2023 National Electrical Code. Read from the city's pages and code on September 30, 2026.
What's different in Lee's Summit
The 15-foot height cap, measured to the peak. Table 6.IV-1 lists "Gazebo (Detached)" at side 10 feet, rear 10 feet, height 15 feet, and "Deck (Detached) — Covered" at the same setbacks and height, with the note that height is "measured to the highest point of structure, i.e., roof peak." A pavilion on 8-foot posts with a 6:12 roof over a 16-foot span peaks around 12–13 feet — inside the cap, but a steeper roof or taller posts can break it (Lee's Summit UDO Article 6, Division IV, accessed 2026-09-30). The ordinance also directs that "accessory structures or uses not identified in this chapter shall be submitted to the Director for consideration and interpretation," so we confirm which row the reviewer applies to an open pavilion.
Within 10 feet of the house, it becomes part of the house. Section 6.1320.F: an accessory structure "located within ten feet of the principal structure … shall comply with the yard requirements of the principal structure." An attached deck and gazebo in R-1 need 25 feet from the rear line. Detaching by more than 10 feet keeps the 10-foot accessory setbacks.
October 1, 2026. The city's building-codes page lists the 2018 codes with the 2017 NEC through September 30, and the 2024 IBC/IRC/IPC/IMC/IFGC/IFC with the 2023 NEC effective October 1, 2026 (building codes and amendments, accessed 2026-09-30). For a pavilion the practical differences are in the electrical code and the roofing sections; we draw to the edition in force on the day we file.
Impervious coverage. All residential uses are capped at 60 percent impervious coverage, and "any number of accessory structures is permitted provided that the lot coverage is not exceeded." A pavilion's roof counts; check the total with any patio, driveway and pool deck.
Does your pavilion need a permit?
| Pavilion | Building permit | Electrical permit | Setbacks | Height |
|---|---|---|---|---|
| 10×12 (120 sq ft) | No | Yes if wired | 10 ft side / 10 ft rear; front prohibited | ≤15 ft to peak |
| 12×16 (192 sq ft) and larger | Yes | Yes if wired | 10 / 10; house setbacks if within 10 ft of house | ≤15 ft to peak |
Zoning: where it can go
- Front yard: prohibited. Side and rear: 10 feet (Gazebo, Detached / Deck, Detached – Covered rows of Table 6.IV-1).
- Within 10 feet of the house: the house's district setbacks apply (R-1 rear yard 25 feet for attached decks and gazebos).
- Height: 15 feet to the roof peak.
- Encroachments into easements or right-of-way: governed by the city's Encroachment Policy — pull the plat.
- Corner lots: no accessory structure closer to the side street than the house's building setback line.
- Storm water: at-grade patios may extend to the line but runoff may not be directed onto a neighbor; a pavilion roof concentrates runoff, so plan gutters or splash zones.
Example. A 16×20 pavilion behind a house that sits 45 feet from the rear line: set the pavilion's back edge 10 feet off the rear line and more than 10 feet off the house, keep the ridge under 15 feet, and it fits. Pull it to within 10 feet of the house and the 25-foot R-1 rear setback applies instead.
Codes, footings and drawings
Chapter 7 of the city code adopts the International codes with local amendments, including the 120-square-foot exemption (Chapter 7, Legistar, accessed 2026-09-30). The city does not publish its frost depth or a drawing list for accessory structures online; the metro standard is 36 inches, and we confirm the value and the submittal list with Development Services before filing. Fees follow the city's valuation-based fee schedule. Permits are obtained through the CityView portal.
Who can pull the permit
"Permits may be obtained by a licensed contractor or by a homeowner for their primary residence only" (Lee's Summit permits, accessed 2026-09-30). Contractors hold Class A (all structures), B (up to three stories), C (residential) or D (mechanical, electrical, plumbing) licenses, carry at least $300,000 in general liability insurance and complete continuing education. Electrical work is Class D.
What we handle
Design to the 15-foot peak and the 10-foot setbacks; the decision to detach beyond 10 feet from the house; drawings and specs for the HOA (most Lee's Summit subdivisions have one) and the city; filing under the code edition in force; a licensed electrical contractor for the electrical permit.
Not verified online — we confirm before submitting
Which Table 6.IV-1 row the Director applies to an open pavilion; frost depth and the 2024-code amendments; drawing requirements; fee amount; inspection list; whether a homeowner may wire their own pavilion.
Frequently asked questions
Does a pavilion count as a "gazebo" here? The table's closest rows are "Gazebo (Detached)" and "Deck (Detached) — Covered," both 10/10 and 15 feet. Unlisted structures go to the Director for interpretation; we ask rather than guess.
Will my permit change if I file in October? Yes — the 2024 IRC and 2023 NEC apply to applications on or after October 1, 2026. The structure is the same; the electrical and roofing details are drawn to the new edition.
Can I build it right off the patio door? Within 10 feet of the house it must meet the house's setbacks, which are larger. Detaching it more than 10 feet keeps the 10-foot accessory setbacks and usually keeps more daylight in the room behind it.
Last updated: September 30, 2026. Compare: Kansas City, MO · all jurisdictions. Get a quote or run the Instant Estimate.