Lake County, IL Swimming Pools & Spas: Pool Permits (2026)
Swimming pool permit rules in Lake County, IL, also covering above-ground pools, in-ground pools, and spa installations, set fencing, barrier, alarm, and inspection requirements.
Key Facts
- Barrier trigger
- Required once pool depth exceeds 2 feet
- Setbacks
- Pools may not intrude into required setbacks
- Permit
- Building permit required for above-ground pools
- Permit expiry
- Voids after 6 months without occupancy cert
- Scope
- Unincorporated Lake County only
Summary
Unincorporated Lake County requires a building permit for above-ground and in-ground pools alike, and any pool deeper than two feet needs a protective barrier under Zoning Code § 151.113(K) before installation is complete.
(K) Private swimming pools and tennis courts. (1) Setbacks. Pools and tennis courts, including but not limited to walls and equipment rooms, shall not extend into any required setback area. (2) Fences. Swimming pools of more than two feet in depth shall be provided with a protective barrier in accordance with the building code. (3) Private use only. A pool or tennis court accessory to a principal residential use shall not be operated as a business or private club.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-15: Supplement contains: Local legislation current through Ord. 26-0618, passed 6-9-2026 | State legislation current through ILCS Pamphlet 2025 #5).
Full Breakdown
Lake County's Unified Development Ordinance treats above-ground and in-ground pools identically. Under § 151.113(K), a pool cannot extend into any required setback, and any pool deeper than two feet needs a protective barrier meeting the building code: pools two feet deep or less aren't subject to that barrier requirement. Separately, the county's 2024 IRC amendments (§ 150.17, R105.5) require a building permit for above-ground or in-ground pools; that permit voids if a certificate of occupancy isn't issued within six months of issuance. Both rules apply only in unincorporated Lake County, not in Waukegan, Highland Park, Gurnee or Libertyville, which enforce their own codes.
Violations & Fines
Building without a permit, installing a deep pool without a barrier, or letting a pool permit lapse can bring a $500-per-offense fine under § 150.20, with each week a separate violation.
Frequently Asked Questions
Does an above-ground pool need a fence in unincorporated Lake County?
Do I need a permit to install an above-ground pool in Lake County?
Does this apply inside Waukegan or Highland Park?
Sources & Official References
Other rules in Lake County
Compare Lake County to another location·View the Illinois swimming pools & spas overview
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