Custom Accessory Dwelling Units in the Bay Area

Make the most of your backyard space with a custom structure from Backyard Unlimited. Since 2009, we’ve helped thousands of homeowners throughout the Bay Area increase comfort, usable space, and resale value with premium quality ADUs.

What is an ADU?

Accessory Dwelling Units (ADUs) are a popular way to invest in your existing property and are one of the fastest growing forms of housing in California. They are most commonly built on single family residential lots, where many want to live, but where smaller more affordable housing is hard to find. At Backyard Unlimited, we specialize in designing and building detached ADUs. These accessory structures are legally rentable, have their own address, and can have separate utility metering if desired. ADUs are usually limited to 1200 square feet, but on average are around 750 square feet.

Benefits of Building an ADU

An accessory dwelling unit increases your property’s value since it’s an entirely separate living space. You can fully customize your ADU with the same high-quality materials that you would use in your own home. Everything is built to code and fully-permitted, using building-grade materials designed to last for over 50 years.

We’ve seen our customers use their ADUs in extremely creative ways including:

  • Housing for families
  • Elderly parents
  • First step for young adults
  • Rental property

Housing for families

ADUs are an excellent way to keep family close. We have found this to be the most common reason
people are seeking to build an ADU.

Elderly parents

As parents and in-laws age, they often start requiring a higher level of support and assistance. Assisted living facilities are one option, but these are usually awfully expensive and may not be the environment your loved one is looking for.
An alternative is to build an ADU for your aging parent. This method allows families to stay close and be taken care of if needed, while saving a considerable
amount of money and maintaining their independence.

First, you will work with your family member to design an ADU that meets their desires and care needs. Typically, clients will utilize financing from their
family member’s existing assets (HELOC, sale of house, reverse mortgage) to help fund the ADU build. Once the ADU is built, your family members can move in and start enjoying their brand-new living space, designed, and built just for them.

First step for young adults

Heading out into the world for the first time as an adult on your own can be a hard time. Many young adults are stuck between wanting independence and needing financial and other assistance from parents while they get on their feet.
An ADU solves both problems simultaneously. It allows young adults to learn the basics of maintaining a home and being responsible for household chores expenses. At the same time, they are close enough for parents to lend a helping hand when needed.

Rental

ADUs allow you to easily earn passive income by using them as a rental property. Some opt to build an ADU with a privacy fence on their property, giving both the ADU and primary house a sense of privacy and independence. The ADU is then rented out long-term (greater than 30 days) for rental income. Others end up moving into their freshly built ADU and renting their primary residence long-term at market rates.
Both options make great financial sense.
NOTE: Most localities prohibit ADUs from being rented out short-term (< 30 days), and from posting them on short-term rental sites such as Airbnb.

ADU Builder in San Francisco Bay Area

Based in Sacramento, Backyard Unlimited delivers and installs custom structures throughout the San Francisco Bay Area, including Oakland, Fremont, Santa Rosa, Hayward, Fairfield, Berkeley, Richmond, San Pablo, Petaluma, Sonoma, and Napa.

Regulations for Building an ADU in the Bay Area

1

Bay Area ADU Building Requirements

Specific laws and guidelines govern building ADUs, and the laws can vary based on municipality.

Two major requirements for ADUs are: 1) the structure must be fewer than 1,200 square feet; 2) the property owner must reside in either the main residence or the ADU.

Check with your local government or visit their website to see the regulations that apply to your project. We’ve provided information for a few areas in the San Francisco Bay Area below.

2

San Francisco ADU Requirements

The City of San Francisco has put together a step-by-step list to walk you and your ADU builder through the process of building, permitting and designing your ADU.

San Francisco’s ADU Guide
3

Oakland ADU Requirements

The City of Oakland has put together a guide of existing conditions and barriers to help you through the process of building an ADU.

Oakland ADU Initiative
4

Berkeley ADU Requirements

Check out the City of Berkeley’s page to view the city’s ordinances, restrictions and frequently asked questions about building an ADU in Berkeley.

Berkeley ADU Building Information
5

Sonoma ADU Requirements

Check out Sonoma County’s page for all of the information and regulations in regards to building an ADU in Sonoma.

Sonoma County ADU Guide

Featured Project: Payran St in Petaluma, California

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 full kitchen. Total cost of the project is $196,813.

See Project Details

Happy Customers

“They did a 20×14 studio for me. They were helpful and accommodating at all stages of the process. The workmanship and quality of the shed was excellent. An excellent value for the price.”

Brad V. (Google Review) (San Francisco, CA)

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