An Accessory Dwelling Unit (ADU) is a fully independent residential living space built on the same property as an existing home. ADUs may be detached, attached, or created by converting an existing garage.

What types of ADUs does EDR Design Build build?

We design and build detached ADUs, attached ADUs, garage conversions, above-garage ADUs, and other custom accessory dwelling units tailored to your property and goals.

Do you handle the entire ADU process?

Yes. As a design-build firm, EDR Design Build manages architectural design, engineering coordination, permitting, city approvals, construction, and project management from start to finish.

How long does an ADU project take?

Every project is different depending on the size, complexity, permitting process, and material selections. The overall timeline includes design, city approvals, construction, inspections, and final completion.

Do I need permits to build an ADU?

Yes. ADUs typically require permits, plans, engineering, and inspections. Our team coordinates the permitting process and works directly with local jurisdictions throughout Silicon Valley and the Bay Area.

Can an ADU have its own kitchen and bathroom?

Yes. ADUs are designed as fully functional living spaces and typically include a kitchen, bathroom, bedroom or sleeping area, and separate living space.

What are the benefits of building an ADU?

An ADU can provide additional living space for family members, generate rental income, increase property value, create a private guest house, or provide flexible housing for changing family needs.

What areas does EDR Design Build serve for ADU construction?

We provide ADU design-build services throughout Silicon Valley and the San Francisco Bay Area, including Los Gatos, San Jose, Saratoga, Cupertino, Palo Alto, Menlo Park, Atherton, Woodside, San Mateo, and surrounding communities.

Backyard with a small lawn area, adjacent to a concrete patio, featuring a tree with red and green leaves, and a white house with sliding glass door, air conditioning unit, and a wooden fence in the background.

ADU — Accessory Dwelling Units

CALIFORNIA'S SMARTEST HOUSING INVESTMENT. WE MAKE IT SIMPLE.

Build equity. Generate income. House family. All on your existing lot.

ADU TYPES WE BUILD

California's ADU laws have unlocked one of the most powerful wealth-building opportunities available to Bay Area homeowners. Whether you are looking to create rental income, house a family member, or simply maximize the value of your property, EDR Design Build delivers ADUs that are beautifully designed, built to last, and completed on a timeline that others simply cannot match.

Detached ADUs — standalone structures in your backyard, fully independent

A checkmark inside a circle, representing approval or completion.

Attached ADUs — additions connected to your primary residence

A teal check mark inside a teal circle on a black background.

Garage conversion ADUs — transform existing garage space into livable square footage

Junior ADUs (JADUs) — interior conversions within your existing home

A teal check mark inside a teal circle on a black background, symbolizing approval or success.

SB9 second units — take advantage of lot-split legislation for maximum property value

A teal check mark inside a circle on a black background.

WHY THE BAY AREA CHOOSES EDR FOR ADUs

ADUs sound simple. They are not. Between setback requirements, utility connections, owner-occupancy rules, and the permitting maze of Bay Area municipalities, most contractors leave homeowners frustrated and over budget. EDR has built the systems, the relationships, and the expertise to take your ADU from concept to certificate of occupancy with remarkable efficiency.

Modern kitchen with mint green cabinets, stainless steel appliances, marble countertops, and a window overlooking greenery.

THE EDR ADU ADVANTAGE

• AI-assisted design and pre-visualization — see your ADU before we break ground

• In-house permit management — we navigate the building department, you don't have to

• Faster construction timelines — our integrated process cuts months off typical ADU builds

• Full coordination with utilities, engineering, and inspections

• Financing guidance — we connect you with trusted ADU lending resources

The gold standard in Bay Area ADU construction. Backed by results. Proven by clients.

An aerial view of a residential backyard featuring a lawn, a curved concrete walkway, trees, and surrounding houses.

Modern kitchen with green cabinets, stainless steel refrigerator, oven, range hood, and marble countertops, with window showing outdoor greenery.

A modern bathroom with a bathtub, walk-in shower, toilet, vanity with sink, and a large mirror with LED lighting.

A modern home office with a large window showing trees outside. The room has a wooden desk with a black office chair, dual computer monitors, a laptop, and a white desk lamp. Decorative plants and books are on the desk, with a potted fiddle leaf fig plant nearby. A tall bookshelf, wall art, and a floating shelf with small plants and framed photo are also present.

Frequently Asked Questions

An Accessory Dwelling Unit (ADU) is a fully independent residential living space built on the same property as an existing home. ADUs may be detached, attached, or created by converting an existing garage.
We design and build detached ADUs, attached ADUs, garage conversions, above-garage ADUs, and other custom accessory dwelling units tailored to your property and goals.
Yes. As a design-build firm, EDR Design Build manages architectural design, engineering coordination, permitting, city approvals, construction, and project management from start to finish.
Every project is different depending on the size, complexity, permitting process, and material selections. The overall timeline includes design, city approvals, construction, inspections, and final completion.
Yes. ADUs are designed as fully functional living spaces and typically include a kitchen, bathroom, bedroom or sleeping area, and separate living space.

You can contact EDR Design Build by submitting an inquiry through our website, calling our office directly, or requesting a consultation online.
We serve homeowners throughout Silicon Valley and the Bay Area, including Los Gatos, San Jose, Palo Alto, Saratoga, Sunnyvale, and surrounding cities. Once we receive your inquiry, our team will schedule an initial consultation to discuss your project goals and next steps.
Yes. ADUs are designed as fully functional living spaces and typically include a kitchen, bathroom, bedroom or sleeping area, and separate living space.
An ADU can provide additional living space for family members, generate rental income, increase property value, create a private guest house, or provide flexible housing for changing family needs.
We provide ADU design-build services throughout Silicon Valley and the San Francisco Bay Area, including Los Gatos, San Jose, Saratoga, Cupertino, Palo Alto, Menlo Park, Atherton, Woodside, San Mateo, and surrounding communities.