Above-ground pools in Baltimore County need a building permit when over 250 square feet with water 24 inches or more deep. Where access is by ladder or steps, the ladder or steps must be secured, locked, or removed to prevent access, per Section 3109.4.1.9 of the 2015 IBC.
Per Baltimore County's Residential Swimming Pool requirements (PAI BPP 10), for above-ground pools where the means of access is a ladder or steps, the ladder or steps must be secured, locked, or removed to prevent access (Section 3109.4.1.9, 2015 IBC). The county's Swimming Pools Building Permit page sets the permit threshold: above-ground pools over 250 square feet with a water depth of 24 inches or more require a permit, and any pool in a Chesapeake Bay Critical Area, floodplain, or on a historic property needs a permit regardless of size. The full 48-inch barrier, self-closing/self-latching gate, and electrical-clearance rules apply to above-ground pools, and a pool cover is not accepted as the protective device. Note the county has since adopted
An above-ground pool built without a required permit or with an unsecured ladder fails inspection and is subject to PAI Code Enforcement. The pool may not be used until access controls and any required barrier are compliant.
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