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Prefab ADU in Alameda County

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

About Alameda County

As the housing needs in Alameda County continue to grow, residents are exploring alternative housing solutions, and prefab Accessory Dwelling Units (ADUs) stand out as a promising option. A prefab ADU is a secondary housing unit built on the same lot as a primary residence and can serve as a space for family, a rental opportunity, or simply a place for relaxation and creativity.

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 Studio nestled in an Alameda County backyard within the city of Piedmont.

An Abodu Studio nestled in an Alameda County backyard within the city of Piedmont.

Alameda County ADU requirements

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


How much does an ADU unit cost in Alameda County?

Estimate the cost by using the ADU calculator tool, which was developed by the county's ADU Resource Center. According to the calculator, a premium 750-square-foot modular studio in Oakland or Piedmont could cost around $331,000 to build.

Building Permits

How do I get an ADU permit?

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 facilities are required for an ADU?

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 Alameda County has specific requirements for ADU utilities like fire sprinklers and water meters.


How do I finance an ADU unit in Alameda County?

Financing a prefab ADU project can be approached 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. Learn more about Abodu's Financing options here.

FAQs: Prefab ADUs in Alameda County

Fee schedules for ADU permits in Alameda 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.

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

In Alameda 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 often come equipped with several essential appliances, including, but not limited to:

  • Stove or cooktop

  • Refrigerator

  • Oven

  • Dishwasher

  • Washer and dryer

  • Water heater

  • HVAC system

These appliances enhance the comfort and functionality of any living space.

Learn more about Abodu Prefab ADUs

If you’re considering a portable ADU in Alameda County, Abodu is a reliable and experienced provider offering a range of options from small, modern units to more spacious and elaborately-designed ADUs. Their commitment to quality, efficiency, and customer satisfaction makes them a top choice for homeowners.Discover solutions for all types of preferences and budgets among Abodu’s offerings, ensuring that your new ADU will be a valuable addition to your property. To learn more, explore the possibilities at Abodu. Whether you’re in Atherton, Danville, Dublin, Half Moon Bay, Hercules, Hillsborough, Lafayette, Laguna Niguel, or Livermore, Abodu is ready to help you navigate the process of adding a beautiful, functional ADU to your home.

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All-in-One Service

Featuring an impressive selection of pre-approved plans, Abodu streamlines the process of building and installing premium built-to-order ADUs.

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Unparalleled Design

Each floor plan showcases timeless designs using sustainable, high-quality materials—all with upfront pricing.

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Committed to delivering a straightforward, hassle-free experience for California homeowners, our efficient approach to prefab ADUs lets you enjoy your newly added living space as soon as seven months after signing on the dotted line.

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A Great Investment

Take advantage of an exceptional return on investment with an Abodu ADU.

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Book a call or tour today.