Learn more about how you can use build a custom Accessory Dwelling Unit (ADU) and use it as a tiny home on your San Diego property. Add useful living space for a lot less than building a traditional home.

Looking for a tiny home price? Complete our ADU Quote form and we’ll get back to you with a price estimate.

Explore Our Accessory Dwelling Unit Models

Browse ADU models that are popular in San Diego. Keep in mind that these models serve as a starting point.

Each ADU can be customized to your space, needs, and design aesthetic.


Model:1 Bed Bathrooms:1 Sq. Feet:400

The Sierra is a 400 square foot, one-bedroom, studio-style ADU.

Starting at: $122,000


Model:1 Bed Bathrooms:1 Sq. Feet:600

The Cascade is a 600 square foot, one-bedroom, one bathroom ADU.

Starting at: $183,000


Model:2 Beds Bathrooms:2 Sq. Feet:735

A popular model that includes 2 beds, 2 baths, and full kitchen & living space in a small footprint.

Starting at: $224,175


Model:2 Beds Bathrooms:1 Sq. Feet:747

Popular in Northern California, the Klamath adds functionality and practicality in a warm, inviting space.

Starting at: $231,600


Model:2 Beds Bathrooms:1 Sq. Feet:750

The Linn is a 750 square foot, two-bedroom, one bathroom ADU.

Starting at: $228,750


Model:2 Beds Bathrooms:2 Sq. Feet:900

The Lassen is a 900 square foot, two-bedroom, two-bathroom ADU.

Starting at: $274,500


Model:1 Bed Bathrooms:2 Sq. Feet:910

Modoc maximizes useful space by combining a 376 sq. ft. ADU & 534 sq. ft. 2-car garage into one structure.

Starting at: $234,900


Model:3 Beds Bathrooms:2 Sq. Feet:1,100

The Tamalpais is an 1100 square foot, two-bedroom, two-bathroom ADU.

Starting at: $335,500


Model:3 Beds Bathrooms:3 Sq. Feet:1,200

The Shasta is an 1200 square foot, three-bedroom, three-bathroom ADU.

Starting at: $366,000

Featured ADU Project: Petaluma, CA

This ADU project is a 747 square foot standalone structure in Petaluma, California. This structure is 21′ x 36′ and features 2 bedrooms, 1 bath, and a full kitchen.


View Project Details

ADU Design & Quote Process

Designing and building an Accessory Dwelling Unit is a long, complex process. From initial contact to final inspection, most of our ADU projects are completed in under 1 year.

Here are the basic steps in our ADU Design/Build process:

  1. Determine your eligibility
  2. Free initial consultation
  3. 3D design rendering
  4. Drafting & engineering
  5. Permitting
  6. Construction
ADU Process Details

Start Your ADU Quote

Interested in adding an Accessory Dwelling Unit to your property? Use our builder to customize your ADU, then we will contact you to set up an initial consultation to discuss your pricing and other options.

Build & Quote Your ADU

Custom Tiny Home Builder Serving San Diego County

Since 2009, we have helped our San Diego neighbors increase their livable space and property values by adding tiny home ADU units to their properties.

Over the years, we have worked throughout the San Diego region, including Oceanside, Carlsbad, San Marcos, Encinitas, Del Mar, El Cajon, Chula Vista, and La Mesa.

Frequently Asked Questions About ADUs in San Diego


Are tiny houses legal in San Diego County?

Yes. If your property is within the County of San Diego, one ADU and one JADU (Junior Accessory Dwelling Unit) may potentially be permitted on lots with an existing or proposed dwelling unit.

Key Regulations

  • ADU may be rented but is not intended for sale separate from the primary residence.
  • Lot does not have an existing guest living quarters, accessory living quarters, or accessory
    apartment. A
  • The total floor area of a detached ADU shall not exceed 1,200 square feet, independent of the
    square footage of the existing single family dwelling.

Click here for the complete regulations for San Diego County.



How much does a tiny house cost in CA?

ADUs have many benefits. One of those benefits is a lower price point compared to a traditional home, especially when you consider that the average traditional home price in San Diego is about $1 million*.

However, as with any custom home construction project, the cost will vary based on the square footage, number of bedrooms & bathrooms, and other amenities that you add.

Please contact us to get an accurate quote.


Can you live permanently in a tiny home in San Diego?

Yes. In San Diego County, ADUs may be inhabited and used as tiny homes. Additionally, houses on wheels (THOWs) are permitted in all zoning districts, as long as they comply with the California State Building Code.

ADU Resources

If you’re looking to add an ADU to your San Diego property, here are a few guides we’ve created that will hopefully provide useful information for your planning.

ADU Floor Plans, Blueprints & Pricing

Browse our ADU plans and find the layout, size and price that will best suit your needs and budget, or use our builder to customize your ADU.

Can an ADU Be Used as a Tiny House?

The short answer is yes, an ADU can meet the same requirements for living as a tiny house, but just as there are state and local laws that govern ADUs, there are also rules and regulations for tiny houses.

Does an ADU Increase Property Value?

Building a detached ADU is one of the best ways to add affordable living space to your property. Discover the math behind investing in an ADU in California.

“Extremely respectful polite and professional”

“I was looking for a really beautiful tiny house to put on my back deck for an extra bedroom. While backyard unlimited costs more than their competitors, the house has a really unique and cool design (with 7 windows and a slanted roof going up to 11 ft), they were very prompt and friendly, they delivered it 2 to 3 weeks early, and all of the people I spoke with were extremely respectful polite and professional. I cannot recommend them enough.”

Jennifer Holt (Google Review)

Get a Quote

Get started on building your Tiny Home today with our online builder, and we’ll follow up with you to schedule an initial consultation to discuss your options and pricing.

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