Home Addition Contractors

in San Rafael, San Francisco & the North Bay

At Northbay Home Solutions, we design and build custom home additions for homeowners in San Rafael, San Francisco, and throughout the North Bay. Whether you’re expanding your living space, adding bedrooms, or creating a new family room, our experienced team handles every phase of your project—from planning and permits to construction and final inspection.

A well-designed home addition allows you to stay in the home you love while gaining the space you need.

Custom Home Additions Designed for Your Lifestyle

Every home and homeowner is different. That’s why we take a fully customized approach to home additions, ensuring your new space blends seamlessly with your existing structure while improving flow, functionality, and value.

We specialize in:

Room additions
Bedroom and bathroom additions
Second-story additions
Family room and living room expansions
Kitchen expansions and structural extensions
Primary suite additions

Our designs are tailored to your home’s architecture, zoning requirements, and long-term goals.

A modern single-story house with gray exterior, two French doors, and a concrete driveway. A basketball hoop is visible in the background. Lush plants surround the structure, with large leaves in the foreground.

Full-Service Home Addition Contractor

Building a home addition requires careful coordination, expert craftsmanship, and knowledge of local building codes. Northbay Home Solutions provides a turnkey addition process for homeowners across San Rafael, San Francisco, and the greater North Bay, including:

Site evaluation and feasibility planning
Architectural and structural design
Permit preparation and city approvals
Foundation and framing
Roofing, siding, and exterior integration
Electrical, plumbing, and HVAC
Interior finishes and final inspections

We manage the entire project to ensure quality, efficiency, and clear communication from start to finish.

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.

Why Build a Home Addition?

Home additions are one of the most effective ways to increase both usable living space and property value—especially in high-demand areas like San Rafael and San Francisco.

Homeowners choose additions to:

Avoid the cost and hassle of moving
Create space for growing families
Add value in competitive real estate markets
Customize their home to fit changing needs

A thoughtfully designed addition enhances comfort today while protecting your investment long-term.

Construction workers in safety vests are working on a building foundation in a forest area, with orange safety fencing and equipment visible around the site.

Person operating a small red excavator near a house with a forested background. Dirt and construction materials are visible in the foreground.

Two construction workers wearing safety gear work on a muddy site with wooden and metal structures. Orange safety netting surrounds the area, and various materials are scattered on the ground.

A partially constructed wooden structure is seen, covered by tarps with wooden beams exposed. The background features tall trees and a cloudy sky. A ladder leans against the structure.

A partially constructed wooden structure in a forested area, with some tools and wooden planks on-site, and a ladder leaning on the right side. The roof is incomplete, exposing the interior.

Get a Quote.

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