ADU Impact Fees: Fontana vs Hesperia

Are ADU impact fees waived in Fontana?

Yes for ADUs under 750 sq ft — all local impact fees are waived by California Gov. Code §65852.2(f)(3). ADUs 750 sq ft or larger pay proportionally based on the principal dwelling's size, not the full single-family rate.

What ADU costs still apply in Fontana?

Standard building permit fees based on construction valuation, plan-check fees, and utility service fees from the Fontana Water Company or local sewer agency if a new meter is needed. Property taxes will reassess on the added square footage through the San Bernardino County Assessor.

Does Hesperia charge impact fees on a 600 sq ft ADU?

No. California Gov. Code 66315 prohibits any city impact fee on ADUs under 750 sq ft. Building permit fees and water/sewer connection charges may still apply at actual cost.

What fees apply to a 1,000 sq ft ADU in Hesperia?

Building permit and plan check fees apply, plus impact fees proportional to the ADU's share of the primary dwelling's square footage. School fees from Hesperia Unified may apply since the ADU exceeds 500 sq ft, and Mojave Water Agency capacity fees may also apply.