Accessory Structures in Fremont, CA (2026)
6 verified accessory structures rules for Fremont, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Fremont approves accessory dwelling units ministerially under Municipal Code Section 18.190.005, with no discretionary hearing. Detached ADUs top out at 1,200 square feet and 16 feet tall (18 feet near major transit), require only a four-foot side and rear setback, and cannot be rented for less than 30 days.
Fremont ADU Zoning Rules
Some RestrictionsFremont, CA, Municipal Code Sec. 18.190.005(b)(4), (b)(6)
(4) Permitting Procedure. Any application for an ADU and/or a JADU that meets the applicable location and development standards contained in this section shall be subject to ministerial review and approval without discretionary review or public hearing... A permit shall be issued within 60 days of submission of a complete application for an ADU and/or a JADU conforming to the provisions of t...
ADU Impact Fees
Fremont exempts accessory dwelling units from development impact fees when the ADU is built as a remodel or addition that does not change the use of the property. The exemption sits in the city's impact fee ordinance, Chapter 18.290, alongside the broader fee protest and credit system.
ADU Impact Fee Exemption in Fremont
Few RestrictionsFremont, CA, Municipal Code Sec. 18.290.110(b)
(b) Residential development projects, including accessory dwelling units, are exempt from impact fees for any remodel or addition, as long as they do not result in a change of use.
ADU Owner Occupancy
Fremont does not require the property owner to live on site to build or keep an accessory dwelling unit. Municipal Code Sec. 18.190.005(c)(9) states owner occupancy is not required for either the primary dwelling or the ADU.
Fremont ADU Owner-Occupancy Rule
Few RestrictionsFremont, CA, Municipal Code Sec. 18.190.005(c)(9)
(9) Owner Occupancy. Owner occupancy shall not be required for either the primary dwelling unit or the ADU.
ADU Rental Restrictions
Fremont bars short-term rental of accessory dwelling units and junior ADUs. Under Municipal Code Sec. 18.190.005(b)(6), an ADU or JADU cannot be rented for a term of less than 30 days, closing off vacation-rental use of these units citywide.
Fremont ADU Rental Term Limits
Some RestrictionsFremont, CA, Municipal Code Sec. 18.190.005(b)(6)
(6) Rental. An ADU and/or a JADU shall not be rented for a term of less than 30 days.
Shed & Carport Rules
Fremont caps detached accessory structures like sheds at 12 feet in height and 30 percent lot coverage of the required yard. Small sheds under 120 square feet and 6.5 feet tall can skip the standard setback rules entirely under Municipal Code Section 18.153.040.
Fremont Shed and Accessory Structure Rules
Some RestrictionsFremont, CA Municipal Code Sec. 18.153.040
(1) Lot coverage shall not exceed 30 percent of the area of the minimum required rear or side yard in which the structure is placed. Swimming pools are exempt from the coverage limitation. ... (5) The exterior face of the accessory structure wall shall be set back five feet from any property line. ... (b) Exceptions. Detached accessory structures that satisfy all of the following criteria...
Tiny Homes
Fremont adopted Appendix BB (Tiny Houses) of the 2025 California Residential Code under Municipal Code Sec. 15.47.030(a), letting detached tiny houses built as accessory structures use the appendix's reduced ceiling-height, egress, stair and loft standards instead of full dwelling rules, while still requiring a standard building permit.
Fremont Tiny House Building Code Rules
Some RestrictionsFremont, CA, Municipal Code Sec. 15.47.030(a)
The following appendices of the 2025 California Residential Code are adopted by the city of Fremont. The remaining appendices are not adopted. (a) Appendix BB (Tiny Houses);
Looking for Alameda County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Fremont city rules.
Accessory Structures in Alameda County →