Services

Accessory Dwelling Units

Our suite of integrated construction services ensure the highest degree of quality, safety, efficiency and innovation on your projects.

Luxury Accessory Dwelling Units (ADUs) in the Bay Area

Custom ADU Design & Construction by Feldman Construction

A custom-built Accessory Dwelling Unit (ADU) is one of the best ways to expand living space, increase property value, and create a high-end guest or rental unit in the Bay Area.

At Feldman Construction, we specialize in premium ADU design and construction, delivering architecturally stunning, 

high-quality ADUs that integrate seamlessly with your home.

Whether you’re looking for a backyard cottage, in-law suite, or a detached home office, our expert team ensures your ADU is built with top-tier craftsmanship and modern design.

Serving homeowners throughout the Bay Area, including San Mateo County, Santa Clara County, and surrounding communities.

 

What is an Accessory Dwelling Unit (ADU)?

An Accessory Dwelling Unit (ADU)—often called a granny flat, guest house, or secondary dwelling—is a self-contained living space built on the same property as a primary residence. ADUs are permanent, independent units with a kitchen, bathroom, and living space designed for comfortable, private living.

ADU Bay Area

Detached ADU

A freestanding structure separate from the main home

Attached ADU

Built as an extension of the existing residence

Garage Conversion ADU

Repurposes existing garage space into a luxury suite

Basement or Attic ADU

Maximizes underutilized space for a high-end addition

Discover how a luxury ADU can elevate your living experience. Connect with our team to explore design options tailored to your property.

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Bay Area ADU Regulations & Permitting

California has made it easier for homeowners to build ADUs by streamlining zoning regulations and accelerating permit approvals. However, each city in the Bay Area has specific requirements regarding size, setbacks, and design approvals.

Key ADU Regulations for Bay Area Homeowners

  • ✔ Size Limitations: ADUs can be up to 1,200 sq. ft., depending on lot size and city zoning
  • ✔ Setback Requirements: Typically 4 feet from property lines for detached ADUs.
  • ✔ Owner-Occupancy Rules: No longer required for most ADUs under California law.
  • ✔ Parking Requirements: Generally waived if your property is within half a mile of public transit.

Navigating the local permitting process can be complex, but our team at Feldman Construction handles all zoning approvals, permits, and compliance requirements, ensuring a smooth and efficient build.

How Much Does It Cost To Build an ADU?

The cost of building an ADU depends on various factors, including:

  • Size and layout complexity

  • Architectural style and custom finishes

  • Materials and structural considerations

  • Zoning and permitting requirements in different Bay Area cities

Every ADU project is unique, and we provide custom pricing based on your vision, needs, and property specifications. Contact us for a consultation to discuss your project and receive a personalized estimate.

Every ADU project is unique, and we provide custom pricing based on your vision, needs, and property specifications.
Contact us for a consultation to discuss your project and receive a personalized estimate.

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Why Choose Feldman Construction for Your Bay Area ADU?

As a leading luxury ADU builder in the Bay Area, Feldman Construction delivers:

✔ Custom ADU Design –

Tailored to match your home’s architecture

✔ Premium Craftsmanship

High-end finishes and modern energy-efficient features.

✔ Full-Service ADU Construction

From permitting to completion

✔ Full-Service ADU Construction

Compliance with all local regulations

Frequently Asked Questions About Bay Area ADUs

How long does it take to build an ADU in the Bay Area?

Most ADU projects take 6 to 12 months from initial design to completion, depending on size, complexity, and permitting timelines.

Do ADUs increase property value in the Bay Area?

Yes. ADUs significantly increase property value, particularly in high-demand areas like Palo Alto, Menlo Park, and Los Altos.

Do I need a permit to build an ADU?

Yes. Each city in the Bay Area has specific zoning laws and permit requirements, but our team manages the entire process for you.

Can I convert my garage into an ADU?

Yes. Garage conversions are a cost-effective way to add living space and are popular in cities like San Mateo and Santa Clara.

Are ADUs energy-efficient?

Yes. Many ADUs include solar panels, energy-efficient appliances, and sustainable materials to meet California’s energy efficiency standards.

Can Feldman Construction match the ADU design to my existing home architecture?

Yes. Our team specializes in custom architectural design, ensuring that your ADU blends seamlessly with your existing home’s style. Whether your property features modern, contemporary, craftsman, or traditional design, we create ADUs that feel like a natural extension of your home—both visually and structurally.

Start Your Luxury ADU Project with Feldman Construction

A custom-built ADU is a long-term investment in property value, comfort, and premium living space. Feldman Construction specializes in high-end ADU construction, delivering exceptional craftsmanship to homeowners in San Mateo County, Santa Clara County, and the entire Bay Area..

📞 GET IN TOUCH TODAY or [Schedule a Consultation] to get started.

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