Cass County, MO Swimming Pools & Spas: Fencing & Safety Requirements (2026)
Key Facts
- Minimum barrier height
- 4 feet
- Setback from pool edge
- barrier at least 4 feet outside pool perimeter
- Empty-pool rule
- protective covering required
- Bathhouse size cap
- under 200 sq ft
- Governing rule
- Zoning Order, not the Aquatic Code
Summary
A private, in-ground or above-ground swimming pool in unincorporated Cass County needs a detached wall or fence at least four feet high, set at least four feet outside the pool's perimeter, under the Zoning Order's accessory-use rules. An empty pool must also carry a protective cover.
A single swimming pool and bathhouse, provided that the bathhouse is less than two hundred (200) square feet in plan area, that the pool is for private use of the principal residence and neither the pool or bathhouse is located in the front setback area. The pool shall be provided with a detached wall of fence at least four (4) feet in height and located at least four (4) feet outside the perimeter of the pool area for the purposes of limiting uncontrolled access to the pool itself. When empty, the pool shall be provided with a protective covering for the same purpose.
Full Breakdown
030 of the Cass County Zoning Order lists a single swimming pool and bathhouse among the accessory uses allowed on a residential parcel, but only if it serves the private use of the principal residence and stays out of the front setback area. The Order then imposes the barrier standard directly: the pool must be provided with a detached wall or fence at least four feet in height, located at least four feet outside the perimeter of the pool area, for the purpose of limiting uncontrolled access to the pool itself.
When the pool is drained, the same subsection requires a protective covering for the same safety purpose. The bathhouse accompanying the pool is capped at under two hundred square feet of plan area. 512), because that Aquatic Code's plan-review section expressly exempts private, Category III residential pools from its construction and safety provisions, leaving the Zoning Order's four-foot barrier as the operative rule for a homeowner's backyard pool in the unincorporated county.
Violations & Fines
The Zoning Enforcement Officer administers and enforces the Zoning Order. An unfenced or under-fenced pool is a zoning violation subject to written notice, a ten-day correction period, and referral to County or Circuit Court if uncorrected. Fines set by the County Commission can run up to one thousand dollars per day of continuing violation under Section 400.030.
Frequently Asked Questions
How high does my pool fence need to be in unincorporated Cass County?
Does the county's Aquatic Code apply to my backyard pool?
Do I need to cover my pool when it's empty?
Sources & Official References
Other rules in Cass County
Compare Cass County to another location·View the Missouri swimming pools & spas overview
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