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Charles County, MD Swimming Pools & Spas: Fencing & Safety Requirements (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Chain-link wire gauge
Minimum 11.5 AWG required
Mesh fencing
No longer an acceptable pool barrier
Structure wall barrier
Windows no longer count toward compliance
Governing section
Code § 224-1.9, ISPSC Section 305 amendments
Enforcing official
Charles County Building Code Official
Adopted
May 14, 2024, Bill No. 2024-10

Summary

Charles County amends the 2021 International Swimming Pool and Spa Code to tighten what counts as a pool barrier. Chain-link fencing must use wire at least 11.5 AWG gauge, mesh fencing is no longer an acceptable barrier at all, and a house wall can no longer rely on its windows to satisfy the 'structure wall as a barrier' option.

These county ordinances apply to unincorporated areas of Charles County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

ISPSC Section 305.2.7, Chain link dimensions, add "wire gauge must meet or exceed 11.5" awg." ISPSC Section 305.2.4, Mesh fence as a barrier, delete without replacement. ISPSC Section 305.4, Structure wall as a barrier, delete all mentions of "windows," without replacement.

Full Breakdown

Charles County regulates pool barriers by amending, not replacing, the model International Swimming Pool and Spa Code (ISPSC) it adopted as part of the 2021 code suite under Chapter 224, Building Construction, effective with the county's May 14, 2024 building-code overhaul (Bill No. 2024-10). 9. 5 AWG, heavier than typical residential chain link. 4, Mesh fence as a barrier, is deleted without replacement, meaning mesh fencing that the base ISPSC would otherwise allow as a compliant pool barrier is no longer an acceptable option in Charles County; a pool owner must use one of the code's other approved barrier types, such as chain link meeting the new gauge rule, masonry, or ornamental fencing.

4, Structure wall as a barrier, has all mentions of 'windows' deleted without replacement, removing the ability to count a house wall's windows toward satisfying that barrier option. These are targeted subtractions from the model code's menu of acceptable barriers rather than a new standalone fence ordinance, so the remaining ISPSC Section 305 requirements, including self-closing, self-latching gates and minimum barrier height as adopted, continue to apply. Compliance is verified by the Charles County Building Code Official, the official title Chapter 224 assigns in place of 'Building Official' at § 224-1(3), during the pool construction permit and inspection process.

Violations & Fines

Chapter 224 does not set a separate fine schedule for a noncompliant pool barrier; the Building Code Official enforces ISPSC Section 305 through the pool construction permit and inspection process under § 224-1(3). A pool built with mesh fencing, undersized chain-link wire gauge, or windows counted toward a structure-wall barrier will fail inspection and cannot receive final approval until the barrier is brought into compliance with the amended ISPSC.

Frequently Asked Questions

Can I use mesh fencing around my pool in Charles County?
No. Charles County deleted ISPSC Section 305.2.4, Mesh fence as a barrier, without replacement at Code § 224-1.9(2). Mesh fencing that the base International Swimming Pool and Spa Code would otherwise treat as an acceptable barrier option is not a compliant pool barrier here, so owners must choose from the code's other approved barrier types instead.
What wire gauge does chain-link pool fencing need to meet?
Charles County's amendment to ISPSC Section 305.2.7, Chain link dimensions, requires the wire gauge to meet or exceed 11.5 AWG. That standard is added at Code § 224-1.9(1) and applies to any chain-link fence used as a required pool barrier under the county's building code.
Does a house wall with windows count as a pool barrier?
Not fully. Charles County amended ISPSC Section 305.4, Structure wall as a barrier, to delete every mention of 'windows' without replacement at Code § 224-1.9(3). That removes windows from the ways a structure wall can satisfy the barrier requirement, tightening what qualifies compared with the unamended model code.
Who enforces the pool barrier rules in Charles County?
The Charles County Building Code Official, the title Chapter 224 substitutes for 'Building Official' or 'Code Official' under § 224-1(3), reviews and inspects pool barriers for compliance with ISPSC Section 305 as amended before issuing final approval on a residential pool permit.

Sources & Official References

Other rules in Charles County

All Charles County rules

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