Home & Room Additions in San Francisco, San Jose & the Bay Area

Expand Your Bay Area Home with Licensed, Expert, and Recommended Addition Contractors

Looking to add more space to your home? At BNO Builders, we specialize in custom home and room additions throughout San Francisco, San Jose, Palo Alto, Berkeley, Oakland, and the greater Bay Area. Whether you need a new bedroom, an ADU for rental income, a spacious family room, or a second-story addition, our skilled team will bring your vision to life with exceptional craftsmanship and efficient project management. With over 15 years of experience, our licensed professionals handle every aspect of your home addition—from planning and permitting to construction and finishing—ensuring a smooth, stress-free process.

Why Choose BNO Builders for Your Home Addition?

Get Started Today for Your Free Quote!

Service Areas: San Jose, Palo Alto, Berkeley, Sunnyvale, Oakland, Fremont and San Francisco

Bay Area Home Addition Services

Bright, empty room with gray walls and a dark blue accent wall, featuring a window and a wooden floor, door open to another room.

Custom Room Additions & Expansions

Construction of a wooden structure is underway, featuring an open doorway, and scattered building materials outside.

Second-Story Additions

Exterior view of home addition showing a sliding glass door and concrete steps, with a palm tree and wooden fence in the background.

Accessory Dwelling Units (ADUs)

A modern home office featuring a wooden desk, rolling chair, white shelves, and a window with a view of a backyard fence.

Home Office & Specialized Additions

A bright, modern kitchen opens up to a patio with wooden lounges and a decorative umbrella, framed by lush greenery and a lantern.

Garage Additions & Conversions

How Much Do Home Additions Cost in the Bay Area?

Do You Need a Permit for a Home Addition in San Francisco & San Jose?

How Long Does a Home Addition Project Take?

The timeline for a home addition project in San Francisco, San Jose, and the Bay Area varies depending on the project scope. Typically, it takes 3 to 6 months, including:

Construction site with a wooden frame being built in a backyard, surrounded by tools, materials, and a clear blue sky.

Looking for Home Addition Contractors in the Bay Area?

BNO Builders is a trusted home addition contractor serving San Francisco, San Jose, Palo Alto, Berkeley, Sunnyvale, Oakland, Fremont, Walnut Creek, and surrounding areas. With a focus on custom design, high-quality construction, and outstanding customer service, we bring your home expansion dreams to life.

Visit Us at:

2290 North First Street, Suite 108, San Jose, CA

1255 Treat Blvd, Suite 300, Walnut Creek, CA

Call (669) 201-9310 for a Free Consultation!

Email: info@bnobuilders.com

Ready to Expand Your Home?
Let’s Get Started!

BNO Builders is fully licensed and certified (California Contractor License #1107971), ensuring that your home addition project meets the highest standards of safety, quality, and craftsmanship.

Local Expertise in the Bay Area

Contact us today to schedule a free consultation with our expert team!

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