As of January 1, 2020, it has become easier than ever to build Accessory Dwelling Units (ADUs) in California. New 2020 California Law allows property owners to add ADUs to multi-family zoned properties. The new law allows for a minimum of one (1) ADU per property, but a maximum of one (1) ADU per four (4) existing units.

Sturdy Builds specializes in multi-family ADU conversions while complying with your city’s retrofit ordinance. Turn storage closets, laundry rooms, carports, pools, and tuck-under parking into additional rental income.


New units, with finishes comparable to new construction incur a cost that is significantly lower than the additional property value they create, especially if this work can be done at the same time as other building improvements such as complying with the retrofit mandate.

In buildings with underutilized garages or storage areas, ADUs are an excellent way to generate additional income off the space you already own, often while making improvements to the building that will benefit your tenants in the existing units.



Every multi-family dwelling is allowed at least one (1) ADU converted from accessory space. For buildings with four or more units, you can convert twenty five (25%) of the number of units in the building. No parking spaces are required for ADUs created out of accessory space (tuck-under parking, storage unit, etc.) within the multi-dwelling building if the property is within one-half (1/2) mile of public transportation.




If you have a carport or open parking, you can build two (2) detached ADUs on the property in addition to the attached ADU(s) depending on the amount of units in the building. The detached ADUs can be up to 1,200SF each and in some jurisdictions can be attached to each other.



Return on Investment (ROI)

People often underestimate the cost to build a small unit. There are many fixed costs and the expensive square footage, like a kitchen and bathroom, are not an offset by large cheaper square footage (for example, large living rooms, hallways, and multiple bedrooms).

With that said, building an ADU, especially if you intend to keep the property for a few years, represents an enormously beneficial opportunity to maximize your property.

By constructing an ADU, you are adding additional square footage to the property. Therefore, if you can build a unit for $300 a square foot, but the average value of homes in your neighborhood are worth $500 a square foot you are gaining instant equity through the project.

In addition, you also now have the added benefit of a flexible space that is rentable providing passive income.


Sturdy Builds handles the process of building your ADU from design, engineering, acquiring necessary permits and constructing an ADU ready to rent.

  • Consultation

    We will meet at your property for an onsite inspection to establish the amount of ADUs allowed by law. We will review and provide a general build costs including architectural, engineering and construction.

  • Design

    Our design team will provide floor plans, materials, finishes to get the best return from your investment.

  • Permits

    It should take 60 days for the city to approve the submitted plans depending on their workload and Covid-19 limitations.

  • Construction

    As a Design + Build company, we communicate directly with our design team, project manager and construction crews. During the permit process, we secure the building materials, schedule deliveries and prepare the crew. We build with highest standard in the industry, handle all inspections with the City and complete the work in a timely manner.

  • Certificate of Occupancy

    Once approved by the City, we obtain the Certificate of Occupancy and the unit(s) is ready for a prospective tenant.

Sturdy Builds will provide full plans complete the unit including plumbing, electrical, walls, HVAC, roof, ceilings, and floors at the best price. Additional finish work contracted for countertops, fixtures, and flooring are not included.

Call us today at 1-833-STURDYB (788-7392) and get a free inspection to get started with your return on investment.


21300 Victory Blvd, Suite 635 Woodland Hills, CA 91367