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Posted 29th May 2023

San Diego Prefab ADU


Better Place Remodeling ADU contractors can give you a more cost and time-efficient San Diego Prefab ADU modular construction process.

San Diego Prefab ADU is a dwelling unit that we partially built in a factory. It is then installed after being carried to your lot.

With its innovative approach to building, San Diego Prefab ADU has changed the construction industry. Every design element in every project benefits from their unmatched aesthetic sensibilities and meticulous attention to detail.

San Diego Prefab ADU work process

Our San Diego prefab ADU work process is generally as follows:

San Diego Prefab ADU Work ProcessDetails
DesigningWork with an architect or designer to produce a design that fulfills your needs and complies with San Diego’s ADU rules before construction starts.
Obtaining PermitsA Prefab ADU construction project requires a building permit. Before starting construction, you must submit your plans to be evaluated by the San Diego Planning and Development Services to secure all necessary clearances.
Site PreparationTo begin building on your property, you must clean it up, grade it, and connect it to the appropriate utilities.
Delivery of the Prefab ADUThe prefab ADU will be transported to your property and set up on its foundation after the site preparation.
Installation of utilities and finishes


Once the prefabricated ADU has been implemented, the utilities, including the HVAC, electrical, and plumbing systems, must be installed and connected to the main home. The finishes, like the flooring, cabinets, and fixtures, will also be installed at this stage.
InspectionsTo guarantee adherence to building codes and regulations, the San Diego Department of Development Services will inspect during construction to guarantee adherence to building codes and regulations.
Final inspection and issuance of an occupancy permitFollowing the construction’s conclusion, we will conduct a final inspection, and upon approval, an occupancy permit will be issued.


Our San Diego ADU contractor will ensure that we execute exemplary craftsmanship and attention to detail to make your ADU project successful.

San Diego Prefab ADU Rules and Regulations

Prefabricated accessory dwelling units (ADUs) are subject to special restrictions and regulations in San Diego, California. You should be aware of the following significant laws:

  • San Diego Prefab ADUs must adhere to all zoning requirements, including minimum lot size, setbacks, and height restrictions, and are only permitted in single-family residential zones.
  • Prefabricated ADUs in San Diego are restricted to a maximum size of 1,200 square feet, not including associated garages or storage spaces.
  • All California building regulations, including seismic and energy efficiency requirements, must be complied with by prefabricated ADUs.
  • Building permits are necessary to build a San Diego Prefab ADU. Plans are typically reviewed, and sites are inspected as part of the permission process.
  • Unless the prefabricated ADU is within half a mile of a public transportation stop, at least one parking place must be available.
  • Unless an exemption is granted, the primary dwelling on the property must be owner-occupied for at least a year following the construction of the ADU.
  • A San Diego Prefab ADU is subject to a 30-day minimum rental requirement unless in a coastal zone or a transit priority area.

The San Diego Planning and Development Services should always be consulted for the most recent information, as it’s crucial to remember that these policies are subject to change over time.

Trust our experienced Prefab ADU Builder in San Diego!

Better Place Remodeling will ensure a seamless and satisfactory addition of San Diego Prefab ADU to your property. Call us now!


Do I need a permit to build a prefab ADU in San Diego?

Yes, a building permit is required to build a prefab ADU in San Diego. We will assist you in submitting plans to the San Diego Planning and Development Services for review and obtaining necessary approvals.

How long does building a prefab ADU in San Diego take?

Our timeframe for building a prefab ADU in San Diego can vary based on the size and complexity of the design. Typically, the construction process can take between 3 to 6 months.

Can I rent out my prefab ADU in San Diego?

Yes, you can rent out your prefab ADU in San Diego, but the unit can only be rented for 30 days at a time unless the unit is located in a Coastal Zone or Transit Priority Area.

Do I need to live in the primary residence to build a prefab ADU in San Diego?

No, you do not need to live in the primary residence to build a prefab ADU in San Diego. However, the primary residence on the property must be owner-occupied for at least one year after the ADU is constructed unless an exemption is granted.