Fremont runs a Preapproved ADU Program where designers submit plans for citywide reuse. Homeowners then pick a preapproved design for expedited plan review at lower cost.
California baseline plus Fremont zoning. Detached/attached ADU limits and setbacks live in the Community Development ADU pages.
State guarantee: California requires every city to allow at least an 800 sq ft ADU exempt from local lot coverage, FAR, and front-setback rules.
Height baseline: 16 ft for detached, rising to 18 ft within ½ mile of major transit. Attached ADUs follow the primary home, capped at 25 ft.
Outcomes follow state ADU parking limitations and Fremont-specific site rules. Preapproved detached models still require site/civil fit.
Designers submit via city checklist/email (planinfo@fremont.gov). Homeowners use a preapproved design for expedited plan review. Concurrent site-review option also available.
State backstop: A complete ADU permit must receive a decision in 60 business days. If the city stalls past 30 business days, AB 253 lets you hire a certified private plan checker to force a 10-business-day decision.
City markets lower plan-review cost and faster review for preapproved plans vs one-off designs. Exact fee table on Permit Services fee pages.
SB 543: No impact fees on ADUs ≤750 sq ft. Above 750 sq ft, fees scale to the ratio of ADU size vs the main home.
Visit the official Fremont ADU page (link in hero) for current eligibility and downloads.
Standard ADUs in Fremont: no owner-occupancy required (made permanent in 2023).
JADUs: limited to 500 sq ft of interior livable space within an existing single-family home. Owner occupancy is required only when sanitation facilities are shared with the main house. JADUs cannot be used as short-term rentals (AB 1154 / SB 543).
Sketch a floorplan, walk through it in 3D, and have our planners review it for size, height, and setback compliance before you submit to Fremont.
Heads up: Local rules change frequently. This page summarizes publicly available state law (California Government Code §§ 66310–66342) and current local guidance for general planning purposes. Always confirm specifics with the Fremont planning desk before submitting plans. ADUMetrics does not provide legal advice.