What are ADU'S
The accessory dwelling unit, or ADU, is a typically smaller second home that has its own kitchen, bedroom and bathroom facilities, and is located inside, attached to, or close to an existing single-family house. Also known as an in-law suite, guesthouse, backyard cottage or granny flat, an ADU is any additional living unit on the lot of a single-family home.
Legally, an ADU is part of the same property as the main home, regardless of whether it is in the form of an apartment next to the garage, a basement apartment, or a free-standing home. An accessory dwelling unit must be owner occupied and unlike a condominium, it cannot be bought or sold separately.
Although they became less common in the middle of the 20th century, the popularity of ADUs is on the rise. This change comes as homeowners strive to make better use of existing land, and as over-developed areas search for ways to increase the availability of affordable housing options.
- It’s easier than ever to build a secondary unit on your property. Local regulations have been passed to allow you to build an ADU that suits your needs and supports housing needs in your community.
- We’re here to help you navigate the steps toward improving your property with an ADU.
Why You Should Consider An ADU

Take advantage of new laws that allow you to have more than one dwelling on your property.

Adding an ADU will immediately add value to your property, providing benefit now and in the future.

Build an ADU as a monthly rental for a new source of income (which will offset property taxes and mortgage obligation).
Why Work With Us
Axiom ADU Provides Start-to-Finish ADU Services. We are a team of professionals with experience in creating exceptional home. We’re experts in both luxury and budget and even luxury on a budget. That’s why we’re excited to offer ADUs as a smart investment. Our team includes sales, design, project management, project accounting, and construction. Axiom build holds a California general contractor license, with a licensed contractor and general manager on staff. We provide the services you’ll need to make your ADU a reality. Berkeley is our home too, and we enjoy helping our customers build their dreams. Once your ADU is complete, we’re here for any customizing or work that makes your ADU exactly what you desire and whatever your whole property needs.How We Provide Start-to-Finish Services

We provide a report and a rough plan showing what’s possible for your property. We specifically address the key determining factors in what ADU is feasible: local regulations and utility issues.

We’ll work with local offices to determine what plans and reports are required you’re your property. Plans vary by location and type of property and we can provide what’s necessary. We’ll also secure your building permit and help you place your ADU order.

We coordinate every step and provide all the services required to prep your site, build the foundation, and prepare utilities to receive your ADU.

We can help you match your ADU to your existing home, add design features, decks and other features to make your ADU unique, tailor it to your needs, and add value to your property.

The new laws making your ADU possible are designed to help ease the rental problems in Sonoma County. By creating an ADU for your property, you’re creating a home for someone in your community who needs it.