Before You Build in Kirkwood, MO: Permit & Rule Checklist (2026)
Everything you need to know before starting a home improvement project
Building a fence, installing a pool, or adding a shed? Each project has its own set of local permits and rules in Kirkwood. This guide consolidates fence, pool, ADU, shed, fire pit, and landscaping regulations into one checklist so you know what to expect before you start.
Quick Permit Checklist
At-a-glance overview of permit categories in Kirkwood. Click any card for details.
Fences & Walls
2 rules on file
Swimming Pools
1 rule on file
ADUs & Granny Flats
2 rules on file
Sheds & Outbuildings
1 rule on file
Fire Pits & Outdoor Structures
1 rule on file
Landscaping & Tree Removal
No specific rules found
Fences & Walls
Some RestrictionsHeight limits, materials, permits, and shared fence rules.
Height Limits
Some RestrictionsKirkwood Code Chapter 5, Article IV regulates fence height: residential rear and side yards up to 6 feet (posts may extend 6 inches above), front yards up to 4 feet and at least one-third open. Institutional, park, school, commercial, and industrial fences may rise to 10 feet, and tennis-court enclosures of open-mesh construction up to 15 feet. Permits are required for new construction or rebuilding.
Neighbor Fence Rules
Some RestrictionsMO Rev. Stat. §272.010 provides partition fence cost-sharing for rural/agricultural land. Urban residential: each owner responsible for their own fence.
Swimming Pools
Heavy RestrictionsPool permits, safety fencing, and drainage requirements.
Fencing Requirements
Heavy RestrictionsKirkwood requires swimming pools to be enclosed by a barrier at least 4 feet high with a self-closing, self-latching gate, consistent with the Property Maintenance Code and IRC Appendix AG105 standards adopted by the City.
ADUs & Granny Flats
Some RestrictionsAccessory dwelling unit rules and garage conversion permits.
ADU Rules
Some RestrictionsKirkwood passed ADU-permitting zoning changes in 2021 under Chapter 25 (§25-45(b)). Minimum lot size is 15,000 sq ft. Detached ADUs must reflect the architectural style of the principal dwelling and meet principal building setback requirements. ADU accessory structures must not include cooking facilities, sleeping area, or bathing unless approved as an ADU.
Garage Conversions
Some RestrictionsConverting a garage to living space in Kirkwood requires a building permit and zoning compliance. Must comply with 2015 ICC residential standards. Required off-street parking must be maintained. ADU rules apply if kitchen/sleeping area is added (§25-45(b)).
Sheds & Outbuildings
Some RestrictionsShed permits, setback limits, and outbuilding size rules.
Shed Rules
Some RestrictionsSheds in Kirkwood are accessory structures regulated under Chapter 25, Article V (Accessory Uses and Structures). They must be set back at least five feet from all lot lines, stay at least 10 feet from the principal building, and the total of all accessory structures may not exceed 7% of lot area or 1,500 square feet, whichever is less; sheds larger than 120 square feet or taller than 12 feet are major accessory structures requiring Architectural Review Board approval.
Fire Pits & Outdoor Structures
Some RestrictionsFire pit placement, outdoor burning restrictions, and permits.
Fire Pit Rules
Some RestrictionsRecreational fire pits are permitted in Kirkwood following St. Louis County Air Pollution standards: dry seasoned firewood only, base area ≤9 sq ft, smoke must not be visible beyond property line.
Landscaping & Tree Removal
Tree removal permits, heritage tree protections, and water rules.
No specific landscaping & tree removal rules found for Kirkwood. Check with your local building department for current requirements.
General Permit Tips
When do you typically need a permit?
Most cities require permits for structural work, including fences over a certain height, pools, ADUs, and sheds above a size threshold. Even projects that seem minor can trigger permit requirements, so it is always best to check first.
How to apply for a building permit
Visit your local building department or their website. Most jurisdictions accept online applications. You will typically need a site plan, project description, and may need contractor information. Processing times vary from same-day for simple projects to several weeks for larger builds.
Common permit violations to avoid
Building without a permit, exceeding approved dimensions, and ignoring setback requirements are the most common violations. Penalties can include fines, required removal of the structure, and complications when selling your home.
Permit Guides for Nearby Cities
Looking for rules beyond permits? View all ordinances we track for Kirkwood.