Baldwin Park, CA Accessory Structures: ADU Impact Fees (2026)

State law overrides most local caps on ADU size and siting under Gov. Code § 65852.2 and SB 9, but Baldwin Park's own code still sets the local park impact fee an ADU triggers. Under § 154.002, new residential development must dedicate parkland or pay an in-lieu fee sized to provide three acres of park area per 1,000 residents, using a density factor of 4.44 persons per dwelling unit, with the fee based on the fair market land value calculated under § 154.007. Section 154.003, REDUCTION OF FEES FOR SECOND DWELLING UNIT, carves out relief specifically for accessory units: when a building permit is sought to add a second unit to a property that has only one existing single-family dwelling, the in-lieu fee due at Certificate of Occupancy for that second unit is cut to 50% of the amount the § 154.002(B) formula would otherwise produce, regardless of the zoning district, and that reduced rate holds for as long as the property remains developed with only two units.

If a third or later unit is later added to a property that already received the reduced ADU fee, § 154.003(B) requires the full § 154.002(B) formula amount for that new unit plus an additional 50% surcharge equal to the second unit's original in-lieu fee, collected at that unit's Certificate of Occupancy. The fee is due before a Certificate of Occupancy or Temporary Certificate of Occupancy issues, per § 154.002(E). Development that consists of low- or moderate-income or senior-restricted covenanted units can also qualify for the separate exemption at § 154.005 while the covenant runs.