An ADU (Accessory Dwelling Unit) is a secondary home built on the same lot as a primary residence. California law allows ADUs on most residential lots, including single-family and multifamily properties, with streamlined approvals under state law. Local rules may vary, but prefab and modular ADUs are fully legal and regulated under California’s Factory Built Housing (FBH) Program.

Pricing starts as low as $195,000 for a turnkey one-bedroom unit. Final costs depend on the model selected, site conditions, and location. Permit fees, utility upgrades, and local requirements are additional. Contact MF ADU for a customized quote for your property

Our turnkey process covers everything from pre-development and state pre-approved plans to permit processing, foundation, site work, utilities, installation, and final certificate of occupancy. This ensures a seamless, start-to-finish experience

No, we do not offer customizations. This allows us to maintain affordable pricing, short build times, and consistent high-quality finishes

The factory build itself takes about 90 days. From permitting to move-in, the entire process usually takes 4–6 months, depending on local approval timelines.

Yes. All MF ADU prefab and modular homes meet California building codes, fire safety standards, and strict seismic requirements. They are secured to permanent foundations that comply with local codes.

MF ADU offers three floor plans, ranging from a 1-bedroom (408 sq. ft.) to a 2-story, 2-bedroom/2-bath unit (884 sq. ft.). All units feature high-quality finishes and energy-efficient construction

Yes, ADUs can be rented, but state law prohibits rentals shorter than 30 days. MF ADU prefab units can also serve as a primary dwelling unit if desired.