ADU builders in Fremont, California

Fremont does not publish a fee schedule specific to accessory dwelling units. What follows is from its general schedule (effective 2025-07-01), so expect to confirm the figures with the permit counter. These are city fees only. They do not include what a builder charges to design and build the unit.

Plan check

basis Master Fee Schedule (Reso. 8672), valuation-based; flat fee for preapproved plans
preapproved adu detail Applicants using preapproved ADU plans pay a flat plan review fee of $1,000; additional construction and inspection fees still apply and vary depending on the plan selected.
general schedule note Full permit processing fees are in the Master Fee Schedule (Reso. 8672), reached via https://www.fremont.gov/?navid=141. Minimum acceptable building permit valuation per square foot is published separately at https://www.fremont.gov/home/showpublisheddocument/15424/639039007471370000.
extraction note The Fremont Master Fee Schedule (Reso. 8672) is behind a navid redirect and its valuation-based plan check and permit fee tables were not retrieved. The $1,000 preapproved-plan flat fee is the only ADU-relevant plan check figure Fremont publishes on a plain URL.
as of page current as of 2026-08-14

Building permit

basis valuation-based, Master Fee Schedule
detail Not published as an ADU-specific figure. Permit requirement note: 'Permitting of an ADU requires its own permit, separate from any other work occurring on the primary residence, even if the ADU is attached to the primary residence.' Permit requests that combine ADU work with primary residence work are rejected.
as of page current as of 2026-08-14

School district fees

rate Not published by the City.
verbatim Fremont Unified School District (FUSD) may also assess developer fees (i.e. school fees). Contact the utility agencies and FUSD for their current fee rates.
source ADU Informational Handout, updated 1/5/2026

Utility connections

verbatim Utility agencies may require separate connection fees. Contact PG&E for requirements and fees associated with a separate meter for an ADU.
agencies Water: Alameda County Water District (ACWD). Sewer: Union Sanitary District. Both are independent districts, not the City; the City page links to them for their own fee schedules.
source ADU Informational Handout, updated 1/5/2026; Fees page, Other Agency Development Fees section

Impact fees

under 750 language verbatim 4. Do I need to pay impact fees for an ADU? No, ADUs are not subject to development impact fees, regardless of size. Permit fees are [required]. Utility agencies may require separate connection fees.
source url https://www.fremont.gov/home/showpublisheddocument/15798/639032157348800000
source document ADU Informational Handout - Accessory Dwelling Units (ADUs), Single Family Zoning, updated 1/5/2026
rates that would otherwise apply Development Impact Fees effective July 1, 2025 (Resolution 2024-53), per residential unit by bedroom count. 0 bedrooms (studio): Capital Facilities $1,622 + Fire Facilities $304 + Traffic $2,829 + Parkland $5,773 + Park Facilities $6,862 = $17,390. 1 bedroom: $2,194 + $412 + $2,829 + $8,944 + $10,292 = $24,671. Note 2 of the schedule states 'Residential uses pay all five fees listed above.'
dif sheet only adu mention The Summary of Development Impact & Affordable Housing Fees mentions ADUs exactly once, in a definition: "'Rental project' means a residential project, or portion thereof, that creates living units that cannot be sold individually, except that construction of any accessory dwelling unit as defined in FMC Section 18.190.005 shall not be considered a rental project."

Fremont fee scheduleFee schedule PDF

Common questions

These came up when looking for ADU builders in Fremont but did not meet the bar for the list above, usually because they do not advertise a California licence number, do not name Fremont as an area they serve, or do not present accessory dwelling units as a service they offer. They are shown so the list above can be checked rather than taken on trust.

• ADU For You by Venture Construction & Development near miss
• Abodu Homes, Inc. near miss
• Bay Home Remodeling, Inc. near miss
• Driven Construction near miss
• Eano near miss
• Geico Builders near miss
• Giant Builders near miss
• Golden View Renovation near miss
• Gordon Reese Design Build near miss
• HBC Construction near miss
• Ingenious General Construction near miss
• Inspired ADUs near miss
• Levitch Associates, Inc. near miss
• Mayer's Construction and Remodeling near miss
• New Avenue Homes near miss
• New Key Construction near miss
• Next Stage Design + Build near miss
• ON Design & Remodeling (ON Remodeling) near miss
• San Jose ADU & Room Addition near miss
• Sunrooms N More near miss
• Talmadge Construction, Inc. near miss
• US Modular, Inc. near miss
• Vargas Construction near miss
• BUILD 33 Inc.
• Baron Construction and Remodeling Co.
• Bay Modular
• Cupertino ADU Solutions
• EBCON Corporation
• HAUS+
• Home Quality Remodeling Inc.
• IGreen Builders Inc.
• OCA Builders
• Oakland ADU Solutions
• S & S Cabinets & Closets
• S-Squared // Architecture + Interiors + Landscape
• SOD Home Group
• Spruce ADU Builders
• Urban Shore Builders
• Waves Remodeling CA
• prefabADU

1. Look the licence up yourself at cslb.ca.gov. It takes under a minute and shows the current status, any suspensions, and the bond.
2. Ask who carries workers’ compensation for the crew and for every subcontractor. A licensee with no employees may lawfully be exempt, but if someone is hurt on your property you can end up treated as the employer.
3. Ask for two recent permit numbers in any city, then look them up. A builder who has done the work can produce them immediately.
4. Get the price in writing against a drawing set. A published starting price is for a base model and rarely includes site work, utilities, or Fremont fees.