Logo of NorthBay Home Solutions with green text on a black and white background.
Finance
Logo of NorthBay Home Solutions with green text on a black and white background.
Finance
Logo of NorthBay Home Solutions with green text on a black and white background.
Finance

ADU Builders in San Rafael, San Francisco & the North Bay

At Northbay Home Solutions, we specialize in custom ADU construction throughout San Rafael, San Francisco, and the North Bay. Whether you’re planning a detached ADU, garage conversion, or junior ADU (JADU), our experienced team manages your project from start to finish—design, permitting, construction, and final inspection.

Accessory Dwelling Units are one of the most effective ways to add living space, generate rental income, and increase property value across Northern California. With updated California ADU laws making construction more accessible than ever, now is the ideal time to build.

North Bay ADU Design & Construction

Building an ADU requires deep local knowledge, especially when working across multiple jurisdictions. Our team understands San Rafael zoning, San Francisco building requirements, Marin County regulations, and statewide California ADU laws, ensuring your project stays compliant, efficient, and stress-free.

We design and build:

  • Detached ADUs

  • Attached ADUs

  • Garage and basement conversions

  • Junior ADUs (JADUs)

  • In-law units and backyard cottages

Each ADU is custom-designed to complement your existing home while maximizing space, comfort, and long-term value.

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Why Build an ADU

With ongoing housing demand across San Rafael, San Francisco, and surrounding North Bay communities, ADUs offer unmatched flexibility and return on investment.

Homeowners use ADUs for:

  • Long-term rental income

  • Short-term rentals (where permitted)

  • Home offices or creative studios

  • Housing for family members or aging parents

An ADU allows you to expand your property’s potential without the cost of buying a new home.

Full-Service ADU Contractor

Northbay Home Solutions offers a turnkey ADU solution for homeowners in San Rafael, San Francisco, and the greater North Bay. Our services include:

  • Property evaluation and feasibility studies

  • Architectural and structural design

  • Permit preparation and city approvals

  • Foundation, framing, and structural construction

  • Plumbing, electrical, HVAC, and utilities

  • Interior finishes and exterior detailing

  • Final inspections and project close-out

We streamline the ADU process so you can focus on the results—not the paperwork.

A small modern garden shed with a dark door sits surrounded by lush plants, trees, and a stone path in a landscaped backyard.
A shower area with glossy dark blue subway tiles, featuring a built-in shelf, a small window, and accented with small patterned tiles.
A modern living room with a gray sofa, two matching armchairs, a wooden side table, and a rug. A small wooden cabinet is against the wall, and a sliding glass door opens to an outside area.
A corner of a kitchen with white cabinets, some with glass doors displaying dishes and cups. On the counter, there are two jars, a coffee maker, and kitchen utensils in a holder.
A kitchen sink with a single-handle faucet, framed by white countertops and cabinets, is under a window with a patterned tile backsplash and illuminated by a ceiling light above.
Two brass pendant lights with white shades hang from a ceiling in a modern kitchen with white cabinets and a window. The walls are decorated with a subtle geometric pattern.
A modern living room with a blue sofa, two grey armchairs, a wooden side table, a wall-mounted TV, and large glass doors leading to an outside area. The room has hardwood floors and minimal decor.
A modern bathroom with a black vanity, mirror, toilet, and decorative floor tiles. Shelves hold towels, toilet paper, and other essentials. There is a framed picture on the wall above the toilet.
A gray house with white trim features a large white wooden porch with railing and steps. A small shrub garden is visible beside the porch. A wooden fence and an adjacent house are in the background.
A gray single-story house with white trim and a small porch, featuring sliding glass doors, overlooks an uneven backyard with sparse grass patches and a concrete patio.
Modern kitchen with stainless steel appliances, grey cabinets, marble countertops, and a window above the sink. It features a large fridge, dishwasher, gas stove, and dark wood flooring.
Modern kitchen with dark countertops, green cabinets, and stainless steel appliances including a dishwasher, sink, and microwave. There's a large window above the sink and hardwood floors.
A front view of a yellow house with a blue door. The entrance is accessed by steps with white railings. There are two wall lights flanking the door.
A small beige house with white trim features a front porch with a white railing, steps leading up to a glass door, and a backyard with a wooden fence and scattered items.
Modern kitchen with white cabinetry, stainless steel appliances, and a wooden dining table with four blue chairs. The kitchen island features a light wood finish and the room is well-lit by pendant lights.
A modern living room featuring a dark blue sofa, two grey armchairs, a wooden coffee table, a rug, and a framed painting. A sliding barn door leads to another room. Light wood flooring throughout.

Get a Quote.

Let's talk about your project. Fill out the form or give us a call at the number below.