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Prefab ADU in Atherton

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

About Atherton

Nestled in San Mateo County, Atherton is celebrated for its lush landscapes, privacy, and affluent community. With spacious lot sizes and prime residential zoning, it’s an ideal setting for homeowners to expand their living space with a Prefab Accessory Dwelling Unit (ADU). Atherton’s prime location, coupled with the increasing density of the Bay Area, makes it a perfect candidate for the swift, stylish addition of a prefab ADU from Abodu.

What are the benefits of having an ADU in Atherton?

ADUs provide versatile benefits, offering a separate living space for family, a home office, or an additional income through rent. In Atherton, an ADU adds not only functionality but also significant value to your property. The independence and design efficiency of a prefab unit from Abodu streamline the process, catering to the distinguished tastes of Atherton residents.

An Abodu being craned in on install day.

An Abodu being craned in on install day.

Atherton ADU requirements

Atherton adheres to specific ADU requirements. Recent California law updates, especially with SB 897 in 2023, have eased some previous restrictions, fostering a smoother development process for homeowners seeking to build ADUs.


ADU cost in Atherton

Building an ADU in Atherton can vary in cost, reflecting factors such as design, materials, and customization. For those considering a prefab ADU from Abodu, which marries quality with efficiency, costs can be more predictable. A modest budget could align with simpler solutions, such as garage conversions, which is the cheapest way to build an ADU in California—keeping the existing footprint to curb additional expenses.

Building Permits

How do I get an ADU permit in Atherton?

To get an ADU permit in Atherton, CA, familiarize yourself with different ADU types, like detached, attached, conversion, and junior ADUs. Review and comply with local regulations, including size, height, setbacks, and parking requirements, detailed on Atherton's official website and the Permit Applications, Fees & Forms page. Submit the necessary documents and applications to the Atherton Planning Department for approval​​​​​​​​. When you choose Abodu, we handle all permitting for your prefab ADU.


Top ADU requirements in Atherton

In Atherton, CA, the top ADU requirements include: 1) Adherence to size limits, with detached ADUs generally capped at 1,200 square feet; 2) Compliance with setback requirements, usually a minimum of 4 feet from side and rear property lines for attached and detached ADUs; and 3) Parking provisions, where attached and detached ADUs typically need one parking space, unless exempted. These requirements are part of broader regulations designed to integrate ADUs into residential areas while maintaining community standards. For more detailed information, you can visit the Atherton official website, the Permit Applications, Fees & Forms page.


How do I finance an ADU unit in Atherton?

You can finance an ADU through various methods like Home Equity Loans and HELOC, cash-out refinance, and personal lines of credit, each offering different borrowing limits and terms based on the homeowner's equity and financial situation​​​​​​. The CalHFA ADU Grant Program provides up to $40,000 for eligible homeowners to cover pre-development costs, benefiting those with moderate incomes, with no repayment required but potential tax implications​​​​​​. Learn about Abodu Financing here.

FAQs: Prefab ADUs in Atherton

In Atherton, the maximum allowable size for a detached Accessory Dwelling Unit (ADU) is typically up to 1,200 square feet. This size limit is subject to certain factors, such as the total lot area and the size of the primary dwelling on the property​​​​.

The cost of an ADU permit in Atherton can be found in the town's official permit applications, fees, and forms document. Visit the Atherton official website, where they provide detailed information about various permit costs and forms required for different types of construction and development, including ADUs.

Abodu offers a stem wall foundation which we recommend more strongly over a slab-on-grade as it’s more sustainable (uses less concrete, which is one of the most carbon-intensive materials); allows ready access to our under house utilities for maintenance and expansion; and it raises the building above the ground to avoid common moisture problems with slab-on-grade foundations

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

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

Learn more about Abodu Prefab ADUs

Upgrade your property with a high-quality prefab ADU in Atherton. Abodu specializes in custom pre-approved ADUs that are highly efficient, comfortable, and timeless. Between securing permits, constructing the units, and delivering the modular homes to your property, we provide a seamless and hassle-free experience from start to finish. Our turnkey ADUs check all the boxes: functional, eco-friendly, and pre-approved so you can start earning extra rental income as soon as six months after the initial consultation.

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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.