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Prefab ADU in Sonoma County

Abodu makes and installs prefab homes for play, passive income and possibility in as little as 6 months.

About Sonoma County

Considering the addition of an Accessory Dwelling Unit (ADU) to your Sonoma County property? Prefabricated ADUs are an increasingly popular option, offering efficiency, cost-effectiveness, and a streamlined design and construction process. With companies like Abodu leading the way in high-quality prefab ADUs, it's easier than ever to expand your living space.

What are the benefits of having an ADU?

ADUs offer several advantages for homeowners. They can provide additional rental income, accommodate family members, increase property value, and contribute to the community by addressing housing shortages. Moreover, as prefab units are constructed off-site and delivered ready to be installed, they promise a faster, more efficient, and less disruptive building process compared to traditional construction methods.

An Abodu One being installed with a crane.

An Abodu One being installed with a crane.

Sonoma County ADU requirements

When planning to build a prefab ADU in Sonoma County, you must adhere to specific requirements. The Sonoma County Planning Department is the best place to learn about ADU requirements.


How much does an ADU cost in Sonoma County?

Estimate the cost by using the ADU calculator tool, which was developed by the county's ADU Resource Center.

Building Permits

How do I get an ADU permit in Sonoma County?

The permitting process for building an ADU involves submitting detailed plans and documentation—such as floor plans, energy calculations, and engineering data—to the county planning department for review. The office will permit the homeowner or ADU company if the plans comply with local building codes and regulations.


What are the top ADU requirements in Sonoma County?

Since ADUs are functional living spaces separate from the primary residence, California law requires secondary units to have access to basic utilities like water, sewage, and electricity. Additionally, each city within Sonoma County Has specific requirements for ADU utilities like fire sprinklers and water meters.


How do I finance an ADU in Sonoma County?

You can finance prefab ADU projects through various channels, including home equity loans, personal loans, or savings. Some prefab ADU companies also offer financing solutions, making the process easier for homeowners.

FAQs: Prefab ADUs in Sonoma County

Fee schedules for ADU permits in Sonoma County vary by city and unit size, but you can expect to pay a few thousand dollars. Find more information on your city's permitting page. Our Abodu Project Managers handle the permitting process for all prefab ADU builds.

California state law mandates a minimum distance of 4 feet between the ADU and a homeowner’s property line.

In Sonoma County, ADUs may not exceed a floor area of 1,200 square feet, ensuring that an 800 square foot ADU is allowed. This measurement includes areas within the dwelling with a ceiling height of 7 feet or more but excludes garages.

ADUs usually come equipped with several essential appliances, including, but not limited to:

  • Stove or cooktop

  • Refrigerator

  • Oven

  • Dishwasher

  • Washer and dryer

  • Water heater

  • HVAC system

Whether you’re in Prefab ADU in Sonoma City, Abodu is ready to help you navigate the process of adding a beautiful, functional ADU to your home.

Get your backyard assessment.

Upgrade your property with a custom prefab ADU by Abodu. We off full end-to-end service, including permitting, site work, construction, and delivery. Schedule a call or visit our showroom today.

A crane installing an Abodu.
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