Hawaii Pool Permit Process: What Honolulu Homeowners and Architects Need to Know

Does a pool require a permit in Honolulu?

Yes. Any in-ground swimming pool, regardless of size, requires a building permit from DPP. Above-ground pools over 24 inches in depth also require a permit. Inflatable pools and portable spas under 24 inches do not require a permit, though electrical connections for any pool or spa always require a separate electrical permit.

What goes into the plan check submission?

A pool permit submission typically requires:

• Site plan — showing pool location relative to all property lines, existing structures, and utility easements. Verify setback compliance: pools typically must observe the same setbacks as accessory structures for the zone.
• Pool shell structural drawings — stamped by a Hawaii-licensed engineer, showing shell dimensions, reinforcing steel, and gunite or shotcrete specifications.
• Barrier and safety fence plans — see below for the specific requirements under the Hawaii Revised Statutes and the IBC.
• Mechanical/plumbing plans — pump, filter, heater (if any), backwash system, and drainage to an approved outfall. HDOH may require review for properties with on-site wastewater.
• Electrical plans — bonding, GFCI protection, and underwater lighting per NFPA 70 (NEC) as adopted by Hawaii.

Pool barrier requirements

Hawaii Revised Statutes §397 and IBC §3109 (as adopted) require a barrier around every residential swimming pool. The barrier must:

• Be at least 48 inches in height measured on the outside
• Have no openings that allow passage of a 4-inch sphere
• Have no footholds or handholds on the exterior that aid climbing
• Have all gates that open toward the pool self-closing and self-latching, with the latch on the pool side of the gate at least 54 inches above grade

If the dwelling serves as part of the barrier (an exterior wall of the house faces the pool and has no direct access door), additional door alarm requirements apply to any door in that wall that opens to the pool area.

DPP inspectors verify barrier compliance before issuing a final inspection clearance. Non-compliant barriers will fail inspection even if the structural work is complete.

Flood zone pools: additional requirements

Properties in FEMA-designated Special Flood Hazard Areas (Zones A and V on the FIRM map) face additional requirements for pool construction. In Zone AE, pools are typically required to have hydrostatic pressure relief valves or anchoring systems designed by a licensed engineer to prevent uplift during a flood event. In Zone VE (coastal high hazard), pools may be prohibited or restricted depending on the base flood elevation and site characteristics.

SMA (Special Management Area) permits may also be required for properties near the shoreline, independent of the flood zone classification. Consult with the DPP Planning Division before designing a pool on a coastal property.

Lot coverage: pools don't count, but decks do

The water area of a swimming pool does not count toward lot coverage under ROH Chapter 21. However, the surrounding pool deck — if it is covered (by a pergola, shade structure, or roof) — does count. An uncovered concrete or paver deck does not count for lot coverage purposes but may be relevant to impervious surface calculations under DPP's drainage requirements for larger parcels.

A pool house or covered changing area adjacent to the pool counts as full lot coverage and must comply with all accessory structure setbacks.

Common DPP corrections for pool permits

• Barrier details missing from architectural plans — barrier must be shown on the site plan with dimensions
• Structural drawings not stamped by a Hawaii-licensed PE
• Electrical bonding details absent from electrical plans
• Pool setback from property line not dimensioned on site plan
• Drainage outfall not identified (cannot drain to the street without an approved connection)