Updated October 2026. This is a plain-English summary for buyers, not legal advice. The City of Surprise's Building Safety staff make the final call on whether a specific pool barrier complies.
Lots of resale homes in Surprise come with a backyard pool, and the pool fence is one of the most commonly overlooked items in a purchase. Surprise updated its residential pool barrier rules in an ordinance that took effect January 1, 2026, and those rules are not the same as the Arizona state law many people quote. Here is what applies, what changed, and what to check before you close.
Arizona's pool enclosure law, A.R.S. 36-1681, calls for a 5-foot barrier. But the same law says it does not apply in cities that adopt their own ordinance that is equal to or more stringent than the state's. Surprise has its own ordinance, so inside city limits you follow the city's Appendix AC. If the home is in an unincorporated county pocket, Maricopa County's rules apply instead, so check the address first.
The state law also exempts homes where every resident is at least six years old. The Surprise ordinance has no such exemption, so a pool at a home with no young children still needs a compliant barrier under the city code.
These are the main points of Appendix AC105, as adopted in Ordinance 2025-14:
| Item | Requirement |
|---|---|
| Height | At least 48 inches above grade, measured on the side away from the pool |
| Gap at the bottom | No more than 2 inches between grade and the bottom of the barrier |
| Openings | Must not let a 4-inch-diameter sphere pass through |
| Distance from water | Barrier at least 20 inches from the water's edge |
| Chain link | Not allowed as a pool barrier |
| Climbable items | No decorative cutouts, protrusions or objects within 24 inches on the outside that make it easy to climb; no permanent structures or equipment placed where they can be used to climb it |
| Horizontal rails less than 45 inches apart | Rails must be on the pool side, and vertical pickets no more than 1.75 inches apart |
| Horizontal rails 45 inches or more apart | Vertical pickets no more than 4 inches apart |
| Lattice or diagonal fencing | Openings no more than 1.75 inches |
Many Surprise backyards use the back wall of the house as one side of the pool enclosure. In that case the code requires one of these:
The rules cover pools, spas and hot tubs. A spa or hot tub with a safety cover that meets ASTM F1346 is exempt from the barrier requirements.
The ordinance says the owner of a home with a pool or spa built before the amended Appendix AC took effect must comply no later than one year after its effective date, and it lists the effective date as January 1, 2026. It also says everyone who owns, rents, occupies or controls a covered pool must comply at all times, and that removing or disabling a required device, like propping a gate open or unhooking a door alarm, is a violation. Violations are a misdemeanor under the ordinance.
If you are buying a home with an older pool fence, don't assume it was grandfathered. Ask the city's Building Safety division how the deadline applies to that specific property.
Paperwork from the seller. Surprise's code requires anyone who contracts to sell, lease or rent a home with a pool to give the buyer or renter a copy of the barrier rules when the contract is signed. State law separately requires the seller to give you the Arizona Department of Health Services Residential Pool Safety Notice. The standard Arizona resale purchase contract also has a pool barrier notice in which the buyer agrees to look into the barrier rules during the inspection period and, unless the parties agree otherwise, pay to bring the barrier into compliance before moving in.
A checklist for your inspection period:
Fixes like self-closing hinges, a higher latch, door alarms or a removable mesh fence are often simpler than replacing a wall, but get quotes from licensed contractors rather than guessing.
A new pool needs a permit from the city's Development Services Division, and the city's pool permit packet lists the barrier code and the required gate signs. If the lot is in a mapped floodplain, a Maricopa County floodplain use permit comes first. Development Services is at 16000 N. Civic Center Plaza, 623-222-3000.
At least 48 inches, measured on the side away from the pool, with no more than a 2-inch gap at the bottom, under the city's Appendix AC pool barrier code effective January 1, 2026.
Not inside city limits. Arizona's law, A.R.S. 36-1681, does not apply where a city has adopted its own ordinance that is equal to or more stringent. Surprise has its own pool barrier ordinance, which uses a 48-inch minimum along with other requirements such as banning chain link.
Yes. The state law exempts homes where all residents are six or older, but the Surprise ordinance has no such exemption. Everyone who owns, rents, occupies or controls a covered pool must comply.
The ordinance says owners of pools and spas built before the amended code took effect must comply within one year of the effective date, which it lists as January 1, 2026. Ask the city's Building Safety division how that applies to your property.
No. The Surprise code says chain link fencing shall not be used as a pool barrier.
A copy of the city's pool barrier rules at contract signing, required by the Surprise code, and the Arizona Department of Health Services Residential Pool Safety Notice, required by state law.
Sources: City of Surprise Ordinance 2025-14, Appendix AC (amended) Swimming Pools, Spas and Hot Tubs; City of Surprise pool permit packet; Arizona Revised Statutes 36-1681; Arizona Department of Health Services Residential Pool Safety Guidelines and Pool Safety Notice. Related guides: Surprise neighborhoods and HOAs, First 30 days in Surprise, Surprise utilities and 55+ communities.
Jesus Sanchez, REALTOR®, Real Broker AZ, LLC, 3707 E Southern Ave #1074, Mesa, AZ 85206. Equal Housing Opportunity.