How Bellingham Handles Swimming Pools & Spas: A Practical Guide

Bellingham maintains 106 local ordinances across all categories, and 4 of those deal specifically with swimming pools & spas. Here is a breakdown of what the city actually requires, what is prohibited, and where Bellingham falls on the strict-to-permissive spectrum compared to other cities.

Hot Tub Rules

Hot tubs and spas in Bellingham are governed by the 2021 International Swimming Pool and Spa Code (ISPSC) adopted under BMC Chapter 17.10 and Washington State Building Code (Chapter 51-50 WAC), effective March 15, 2024. ISPSC Section 305.6 exempts spas and hot tubs with a safety cover complying with ASTM F1346 from the barrier provisions. A building permit is required for hot tubs/spas that exceed the BMC 17.10.020 exemption (prefabricated above-ground, less than 24 inches deep, no more than 5,000 gallons, accessory to a 1- or 2-family dwelling). Electrical permits and NEC Article 680 bonding inspections are administered by Washington State L&I under WAC 296-46B.

Key details: Permit Exemption (Prefab): Less than 24 in. deep, <=5,000 gal, entirely above ground. Building Permit Authority: Bellingham Permit Center - (360) 778-8300. Electrical Permit: Washington State L&I under WAC 296-46B. Safety Cover Exemption: ASTM F1346 cover exempts spa from barrier (ISPSC 305.6). Without Cover: Must have 48-inch barrier per ISPSC 305.2.

Installing a hot tub or spa that exceeds the BMC 17.10.020 exemption without a Bellingham building permit violates BMC Chapter 17.10 and the Washington State Building Code (WAC 51-50). A hot tub without either an ASTM F1346 safety cover or a code-compliant 48-inch barrier violates ISPSC 305 / 305.6. Performing pool/spa electrical work without a Washington State L&I electrical permit violates WAC 296-46B. A hot tub installed on a deck without verified load capacity violates the 2021 IRC (WAC 51-51).

Safety Rules

Residential pool safety in Bellingham follows the 2021 International Swimming Pool and Spa Code (ISPSC) Section 305 as adopted under BMC Chapter 17.10 and the Washington State Building Code (Chapter 51-50 WAC), effective March 15, 2024. ISPSC Section 305.4 governs dwelling-wall doors providing direct access to the pool (alarm meeting UL 2017, ASTM F1346 powered safety cover, or self-closing/self-latching door with the release at least 54 inches above the floor). Public swimming pools are separately regulated by WAC 246-260 (Water Recreation Facilities) administered by the Washington Department of Health and locally enforced by the Whatcom County Health Department, including federal Virginia Graeme Baker Act anti-entrapment drain covers.

Key details: Residential Safety Code: ISPSC 2021 Section 305 (BMC 17.10 / WAC 51-50). Dwelling Wall as Barrier: Alarm / safety cover / self-closing door (ISPSC 305.4). Door Alarm Standard: UL 2017. Safety Cover Standard: ASTM F1346. Self-Latch Release Height: Minimum 54 inches above floor.

A dwelling-wall door providing direct access to an unenclosed pool that lacks a UL 2017 alarm, ASTM F1346 powered safety cover, or self-closing/self-latching door with the release at least 54 inches above the floor violates ISPSC 305.4. Operating a public or semi-public pool without WAC 246-260 compliance (water quality, anti-entrapment drain, depth markings) is enforced by the Whatcom County Health Department and can result in closure. Disabled or removed pool barrier hardware on a residential pool that previously passed inspection is a continuing violation enforced by the Bellingham Permit Center.

This is one of the stricter rules in Bellingham's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

Pool Permits

Residential swimming pools, hot tubs, and spas in Bellingham require a building permit from the Bellingham Permit Center under BMC Chapter 17.10 and the Washington State Building Code (Chapter 51-50 WAC, including the 2021 ISPSC) and Washington State Residential Code (Chapter 51-51 WAC, 2021 IRC), effective March 15, 2024. Prefabricated swimming pools accessory to a single- or two-family dwelling that are less than 24 inches deep, do not exceed 5,000 gallons, and are installed entirely above ground are exempt from a building permit. Electrical permits and inspections are administered by Washington State L&I under WAC 296-46B (NEC Article 680).

Key details: Permit Exemption (Prefab Above-Ground): Less than 24 in. deep, <=5,000 gal, entirely above ground. Building Permit Authority: Bellingham Permit Center - (360) 778-8300. Electrical Permit: Washington State L&I under WAC 296-46B. Permit Center Address: 210 Lottie Street, Bellingham WA 98225. Building Code Adoption: BMC 17.10 - 2021 IBC, 2021 IRC, 2021 ISPSC.

Installing a swimming pool, hot tub, or spa that exceeds the BMC 17.10.020 permit exemption (less than 24 inches deep, 5,000 gallons or less, entirely above ground, prefabricated) without a Bellingham building permit violates BMC Chapter 17.10 and the Washington State Building Code. Operating a pool that has not passed the ISPSC 305 barrier inspection violates the adopted 2021 ISPSC. Electrical work performed without a Washington State L&I electrical permit violates WAC 296-46B. Decks supporting hot tubs without verified load capacity violate the 2021 IRC (WAC 51-51).

Compared to other cities, Bellingham takes a harder line on pool permits. The enforcement and penalty structure reflects that.

Fencing Requirements

Residential pool, spa, and hot tub barriers in Bellingham follow the 2021 International Swimming Pool and Spa Code (ISPSC) Section 305 as adopted under BMC Chapter 17.10 and the Washington State Building Code (WAC 51-50), effective March 15, 2024. The barrier must be not less than 48 inches above grade on the side facing away from the pool, openings must not allow a 4-inch-diameter sphere to pass, the maximum vertical clearance between grade and the bottom of the barrier is 2 inches (4 inches over a solid surface), and pedestrian access gates must open outward away from the pool, be self-closing, and have a self-latching device. The perimeter pool fence must also satisfy the BMC 20.30.110 yard height limits and the BMC 20.12.060 vision clearance triangle.

Key details: Minimum Barrier Height: 48 inches above grade (ISPSC 305.2.1). Perimeter Buffer: 48-in. height for 3 ft horizontal from outside of barrier. 4-Inch Sphere Rule: No opening allows 4-inch sphere (ISPSC 305.2.2). Max Ground Gap: 2 inches (4 inches over solid surface). Pedestrian Gate Direction: Opens outward away from pool (ISPSC 305.3.1).

A pool barrier under 48 inches above grade violates ISPSC 305.2.1. Barrier openings that allow a 4-inch sphere to pass violate ISPSC 305.2.2. Pedestrian access gates that swing inward toward the pool yard, are not self-closing, or lack a self-latching device violate ISPSC 305.3.1. A gap exceeding 2 inches between grade and the bottom of the barrier (4 inches on a solid surface) is non-compliant. Failed barrier inspection by the Bellingham Permit Center blocks the final pool inspection and the pool may not be placed in service.

Compared to other cities, Bellingham takes a harder line on fencing requirements. The enforcement and penalty structure reflects that.

The Bottom Line

Bellingham is tougher than many cities when it comes to swimming pools & spas. Out of the 4 rules covered here, 3 are rated strict. If you are a homeowner, renter, or business owner in Bellingham, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.

These rules come from Bellingham's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.