Upland, CA Building Safety: Fire Sprinkler Requirements (2026)

050(C), part of the city's Accessory Dwelling Unit chapter adopted under Ord. 1993 (April 14, 2025), ties an ADU's fire sprinkler obligation directly to the primary dwelling's own requirement: fire sprinklers are required in an ADU only if sprinklers are already required in the primary residence. The same subsection forecloses the reverse scenario, stating that the construction of an ADU does not trigger a requirement for fire sprinklers to be installed in the primary dwelling. In practice, a homeowner adding a detached or attached ADU under the city's ADU framework is not automatically required to retrofit sprinklers into the main house solely because of the new unit, and if the primary residence predates sprinkler mandates under the California Residential Code, the ADU likely will not need them either.

040. 050(K)(1)(c) requires that all enclosed structures on the site have fire sprinklers, paired with 40-foot paved access, a 150-foot hose-pull distance limit, and a certificate of compliance that the city or its authorized agent must inspect and certify before the lot-split application can even be submitted, with the applicant covering the inspection cost.