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Top-Rated Addition to existing structure builders in Millbrae - Updated Nov 2026

Avatar for OT Bay Builders
OT Bay Builders
4.9(
118
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"We hired OT Bay Builders to remodel our kitchen, and the transformation is beyond what we imagined! Their design team worked closely with us to bring our vision to life, suggesting great ideas while keeping our budget in mind. The craftsmanship is top-notch, and every detail—from the cabinets to the countertops—was executed perfectly. The team was professional, communicative, and always cleaned up after themselves. If you're considering a home remodel, look no further than OT Bay Builders!"
Broadway Kitchen Remodel
Broadway Full Kitchen remodel
Broadway Full Kitchen remodel
San Francisco Contemporary Kitchen Remodel
San Francisco Contemporary Kitchen Remodel

+81

Response time12 hrs
Response rate100%
Recommended by63%of homeowners
Avatar for S&L REMODELING AND DESIGN INC
S&L REMODELING AND DESIGN INC
4.9(
47
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

In business since 2013

Free estimates

Offers commercial services

"Where do I start! I am so happy I found a trustworthy and reliable contractor in Walnut Creek. Our house was basically a complete rebuild from a 1941 bungalow. We expanded the existing footprint by more than double and also added a detached garage. S&L was the absolute best! We bought the house in February but were not able to complete the drawings/permit process until a whopping 7 months later-- by which time a substantial amount of our resources were used up by paying rent + mortgage+ storage. The contractor we had planned to use could not fit us into his schedule so we were in a bind-- I found Jacob and contacted him immediately. Everyone he has on his team was courteous, responsible, and just very good at what they do. the craftsmanship that went into our house was much better than many of the new construction track homes we have seen. I only wish we found him sooner--since his business also does the architectural drawings-- we probably could have gotten into our house several months earlier. As I was very nervous about making changes to my home, the team at S&L Remodeling and Design made me feel comfortable and excited with the new renovations. The process was quicker than expected and I now have a beautiful kitchen and bathroom space!"
Moraga - Bathroom
Moraga - Bathroom
Moraga - Bathroom
Moraga - Bathroom
Moraga - Bathroom

+65

Response time1 day
Response rate100%
9 neighbors recently requested a quote
Avatar for Masterful Construction, Inc.
Masterful Construction, Inc.
5.0(
28
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"I had an excellent experience working with Masterful Construction for our building design project. Their team was professional, knowledgeable, and highly skilled. They took the time to understand our needs and delivered a design that exceeded our expectations. The communication throughout the process was great, and they were always responsive to our questions and concerns. I highly recommend their services for any building design needs."
master bathroom
san mateo master bath
mirror
Master bathroom
master bathroom

+66

Response time12 hrs
Response rate85%
3 neighbors recently requested a quote
Avatar for Sigura Construction Inc
Sigura Construction Inc
4.4(
58
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"We had an amazing experience with Sigura Construction on our backyard transformation project. They did a fantastic job building a swimming pool, outdoor kitchen, landscaping with pavers, and custom lighting. The entire crew was incredibly professional, thorough, and efficient, delivering top-quality work from start to finish. Ilan, the owner, was outstanding—easy to communicate with, professional, and highly knowledgeable about all the options for our project. He made the entire process seamless and stress-free. Our backyard now looks absolutely stunning, and we’re thrilled with the results. We have complete peace of mind knowing the work was done by true experts. We highly recommend Sigura Construction to anyone looking for exceptional construction services. Thanks again to Ilan and the team for a job well done!"
Bathroom Remodel
Guest Bathroom
Upstairs Bathroom 2
Upstairs Bathroom 1
Downstairs Restroom

+121

1 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Rose Remodeling & Design Inc.
Rose Remodeling & Design Inc.
4.8(
95
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Adir and his team exceeded all expectations with our ADU project. They helped us refine our design, handled permits efficiently, and executed the work beautifully. Every part of the build shows quality and care. What I appreciated most was their communication. They kept us informed the entire time. It?s rare to find a company this reliable."
PHOTO ALBUM
PHOTO ALBUM
PHOTO ALBUM
PHOTO ALBUM
PHOTO ALBUM

+128

Response time6 hrs
Response rate95%
16 neighbors recently requested a quote
Avatar for Bay Remodeling Kitchen & Bath
Bay Remodeling Kitchen & Bath
5.0(
69
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"From the beginning to the end, working with Bay Remodeling Kitchen & Bath was enjoyable. Our home's focal point is now a bespoke island that they built when they renovated our kitchen. Their in-house staff is highly skilled and informed, and they pay unparalleled attention to detail. They produced a finished product that beyond our expectations while adhering to the timeline. Many people have complimented us on the new area. I appreciate your excellent effort."
Palo Alto full Home Remodel
Full Bathroom Remodel Mountain Veiw, CA
Portola Valley, CA
Bathroom Remodel in Palo Alto, CA
Bathroom Remodel San Jose, CA

+183

15 neighbors recently requested a quote
Recommended by67%of homeowners
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"We found McCormick home builders through Angie’s list. They were not one of our original contacts, but they contacted us and came out to give us a quote. Matteo was extremely helpful, informative, honest, and gave us reasonable realistic prices, and did not try to inflate the prices or pressure us in anyway. We felt very comfortable with him immediately. We felt like he was a member of the family that we could just talk to and ask questions he was very personable. He gave us his contact number in case we had other questions and he was always available when we needed him for any type of questions or concerns. Mateo‘s team did a beautiful job. They were fast. They were efficient. They cleaned up beautifully. They did a wonderful job. They were very considerate of our time our needs and our neighbors. They were an absolute pleasure to work with. I would highly recommend Matteo from McCormick home builders for any home building projects, and we will be calling him again in the future!"
.
.
.
.
.

+1

Response time6 hrs
Recommended by17%of homeowners
Avatar for Lindgren Construction
Lindgren Construction
4.3(
36
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

In business since 1996

Free estimates

Small jobs welcome

"Eric took over a partially completed remodeling job. The job
included framing a new floor where there had been a sunken conversation pit,
hanging doors, replacing the old baseboards and completing a wall with new drywall.
His bid was very reasonable and he completed the job quickly and efficiently. I
would use him again and I would definitely recommend him to others.
"
Recommended by92%of homeowners
Avatar for Axiom Renovation Inc.
Axiom Renovation Inc.
5.0(
10
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"We hired Axiom Renovation to modernize an outdated bathroom that hadn't been updated in decades. Najia provided helpful design guidance and made sure every finish worked well together. The transformation is remarkable and has completely changed the feel of the space."
Response time1 day
Response rate100%
21 neighbors recently requested a quote
Avatar for WAVES REMODELING CALIFORNIA
WAVES REMODELING CALIFORNIA
5.0(
28
)
Addition to Existing Structure - Build

Serving Millbrae, CA and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"We are beyond satisfied with my bathroom renovation! The addition of a freestanding bathtub and Italian curb-less shower with floor-to-ceiling tiles turned our space into a luxurious sanctuary. The gold fixtures added a warm touch. From design to completion, Waves Remodeling showed exceptional quality and attention to detail. Highly recommend for a luxurious bathroom renovation experience!"
shower remodel
Kitchen remodel
before
Kitchen remodel
garage remodel

+258

Response time2 hrs
Response rate100%
1 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Millbrae, CA

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Millbrae, CA homeowners’ guide to addition to existing structure building services

From average costs to expert advice, get all the answers you need to get your job done.