Bellingham, WA Home Business: Signage Rules (2026)

Bellingham's home-occupation sign rule is one of the strictest in Washington's Puget Sound region. BMC 20.10.045 limits a home occupation to one flat, unlighted sign flush against the main residential building, not exceeding two square feet, stating only the occupant's name/address/phone number plus the occupation — no logos, no graphics promoting products or services beyond the basic identification. The sign must be flush-mounted (no freestanding pole, no monument sign, no projecting sign) on the main residential building (not on a fence, mailbox, or accessory structure). Illumination of any kind is prohibited — no internal illumination, no external floodlights, no halo lighting, no LED or neon. The broader sign code in BMC Chapter 20.12 (General Standards) applies as an overlay. BMC 20.12.040 provides that in Residential Single (RS) general use type areas, no signs are permitted unless specifically authorized — the home-occupation nameplate under BMC 20.10.045 is one such authorization. BMC 20.12.040 also allows one subdivision identification sign per main entrance (up to 50 sq ft, indirectly lighted) for residential subdivisions, but this is for the development as a whole, not for individual home businesses. Off-premises signs, billboards, banners, A-frame/sandwich-board signs, inflatables, yard signs advertising the home business, vehicle signage on commercial vehicles stored on residential lots, and any animated or electronic message components are prohibited in Bellingham's RS and RM zones. BMC 20.10.045 separately requires no 'outward manifestation of the occupation' — limiting any exterior expression even beyond what the sign code addresses. Sign permits are administered by the Bellingham Permit Center (210 Lottie Street) under BMC Title 17 (Building Code) and BMC Chapter 20.12. Most small residential nameplate signs under 2 sq ft are exempt from a sign permit but must still meet size, illumination, and content limits. State law (RCW 47.42 — Highway Advertising Control Act / Scenic Vistas Act) further restricts off-premises signage along state highways including I-5 and SR 542 (Mt. Baker Highway) through Bellingham. Washington has no statewide preemption of municipal home-occupation sign rules.