A factory-built ADU quote should separate the unit, delivery, foundation, utilities, permits, site work, exclusions, and change orders. Current California Government Code section 66311.5 says a local agency, special district, or water corporation may not impose an impact fee on an ADU with 750 square feet or less of interior livable space. Other fees and connection rules are defined separately, and parcel, coastal, fire, utility, and local requirements still need review by the responsible agency.
AB 1033 lets a local jurisdiction allow ADUs to be sold separately from the primary residence as condominiums. Ask the city or County that governs the parcel whether that option is in force there, and get the current written rules before you structure a project around a separate sale.
Current California Government Code section 66311.5 says a local agency, special district, or water corporation may not impose an impact fee on an ADU with 750 square feet or less of interior livable space. For an ADU over 750 square feet, impact fees must be proportionate to the ADU and primary dwelling square footage. The statute defines impact fees separately from connection fees and capacity charges, so request an itemized fee estimate from the responsible agencies.
A manufactured home may be proposed as an ADU, but the responsible city or County agency must confirm the unit, foundation, site, and permit path for the parcel. A modular or factory-built-housing unit follows a different code and approval path. Ask the agency and each provider to identify the exact classification and approvals in writing before choosing a unit.
Owner-occupancy rules depend on the ADU type and current state and local provisions. Confirm the rule for the parcel and proposed unit with the responsible city or County agency before using rental income or occupancy assumptions in the project budget.
The permit set depends on the unit classification, parcel, site work, utilities, fire area, and local jurisdiction. Ask the responsible agency for a written submittal checklist, then make each quote identify who prepares plans, submits permits, coordinates inspections, and completes any HCD foundation-system records.
An ADU manufactured home in San Diego is a HUD-code factory-built unit placed as a second dwelling on a residential lot, permanently affixed to a foundation and connected to utilities. It works alongside your primary home rather than replacing it, and it needs its own building permit, HCD installation approval, and (if you want it treated as real property) an HCD Form 433A filing. Separate sale under AB 1033 exists only where the local ordinance allows it. Ask the reviewing agency for the current written rule for the parcel.
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