Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Lafayette, CA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

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

Avatar for OT Bay Builders
OT Bay Builders
4.9(
128
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"We needed more space for our growing family, and the addition they built blends in seamlessly with our original home. From permits to the finishing touches, everything was handled professionally. It’s like it was always meant to be part of the house!"
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%
1 neighbors recently requested a quote
Avatar for Zacarias Remodeling Construction
Zacarias Remodeling Construction
5.0(
33
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved

In business since 2009

Free estimates

Customers say: True professional

"Excellent crew. On time, very efficient, good quality work with attention to details, respectful of homeowner's time. Easy to communicate needs and changes to business owner who personally kept track of work in progress. Would not hesitate to hire again."
Remodeling - General Project
Remodeling - General Project
Remodeling - General Project
New kitchen, bedroom and bathroom
Remodeling - General Project

+50

20 neighbors recently requested a quote
Recommended by87%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 Lafayette, CA and surrounding areas

Approved

In business since 2013

Free estimates

Offers commercial services

"Great! Excellent communication from the project manager, work crew went out of their way to do a great job and to pick up materials for me when delivery wasn't possible. They were punctual, cleaned up at the end of each day, tried to minimize the intrusion as much possible, and were really nice guys, great to work with. Work was done on time and on budget. Kitchen looks great and I couldn't be happier. The price was for labor and raw materials. We supplied the cabinets, lighting, countertops, sink, appliances, and windows. We also decided to get the attic insulated at the same time at their suggestion- that addition was not included in the cost below (I don't remember how much it was but it was reasonable.) Here's what the work included: Demo existing kitchen including walls, floor, ceiling and windows. New electrical sub panel and wiring in kitchen Gas line added to kitchen (gas was already in the basement area) Installation of new walls, floors, ceiling, windows, doors, trim Installation of cabinets, countertops, appliances, sink Painting Attic insulation (additional)"
Moraga - Bathroom
Moraga - Bathroom
Moraga - Bathroom
Moraga - Bathroom
Moraga - Bathroom

+65

Response time1 day
Response rate100%
8 neighbors recently requested a quote
Avatar for Home By Tom, Inc
Home By Tom, Inc
5.0(
56
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved

In business since 2023

Free estimates

Offers commercial services

We're a locally owned and operated company that values honesty and integrity and treats your home or business as if it were our own. We are experts in all aspects of roofing projects and our services are customizable to each individual project. We specialize in both installations and replacements. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

My projects
My projects
My projects
My projects
My projects

+48

5 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for BEAR Remodeling Inc.
BEAR Remodeling Inc.
4.8(
34
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Customers say: True professional

"Bear Remodeling did an amazing job on my bathroom remodel. The team was nice, courteous and worked hard to get what I wanted. They paid attention to every detail and made sure the design matched my idea. They also did some interior painting and made the whole room look cohesive and stylish. I was so impressed I asked about adding a room to my house and they gave me some great ideas. If you need a contractor for any remodeling project, call Bear Remodeling!"
Outdoor Kitchen - Clayton
Outdoor Kitchen - Clayton
Outdoor Kitchen - Clayton
Weather Safe
Outdoor Kitchen - Clayton

+127

Response time9 hrs
11 neighbors recently requested a quote
Recommended by58%of homeowners
Avatar for BUILDERS GROUP & DESIGN INC
BUILDERS GROUP & DESIGN INC
5.0(
21
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"The kitchen has become our favorite place in the house. We spend so much more time cooking, entertaining, and just being together as a family. Builders Group took our ideas and turned them into something even better than we imagined. The layout is incredibly functional, the finishes are beautiful, and the craftsmanship really stands out. The entire team was respectful, responsive, and easy to work with from day one. If you’re thinking about remodeling your kitchen, this is definitely the company to trust."
South San Francisco
South San Francisco
South San Francisco
South San Francisco
South San Francisco

+139

5 neighbors recently requested a quote
Avatar for Quartz Construction
Quartz Construction
4.7(
77
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"First of all, these guys are rockstars. I never thought that I will say this about contractors - but they really impressed us with their professionalism and quality of work. We bought a new house with a big yard for our kids to run around (realizations during the pandemic), but it meant that we had to compromise on the quality of the house interior. It looked really old and didn't look renovated after it was build in the 60s. I started talking to general contractors to get it remodelled and was shocked by the timelines and prices being quoted. I found Ohad (owner of Quartz Construction) via yelp reviews and what struck me most was that everyone was commenting on his clear communication. We had done a remodel of our townhome in the past and it was not a great experience since the contractor kept changing timelines and prices in the middle of the job. My wife and I went to their office and had a detailed conversation with Ohad on what we were looking for. We had just a vague idea of what we wanted and this is where Ohad really helped us. He worked with us to create a plan on how we can make the home better and he even played the role of the designer to change the layout to create a new bedroom and bathroom. Post that, he drafted up everything and gave us a detailed quote on everything. 1. Remove 2 fireplaces and an indoor bbq pit within the home. 2. Change complete flooring. 3. Remove the popcorn cieling (and asbestos) and put new cieling. 4. Complete remodel of kitchen including structural changes. 5. Complete remodel of 2 bathrooms. 6. Construction of a new room and bathroom (with structural change). 7. Remodel the laundry room and guest washroom. 8. Recess lights across the house (close to 80 + recess lights across the house). 9. Painting interior and exterior. 10. New sub-panel for appliances. 11. All the required permits for these. Ohad a quoted a very reasonable price for all of this and he quoted 2 months to finish the project. I was a bit shocked, but he was very confident about it. We really liked the way he communicated and had an open discussion about everything, so we decided to go with him. Ohad had promised us that we will see progress in our house everyday and he kept that promise. His workers are honest, hard working folks and we were really impressed by everyone - especially Omar who was the worksite supervisor. The workers showed up everyday on time (8 am or earlier) and left late evening by 7 pm. They left the worksite so clean after every day's work that we used to wonder whether they were planning to come back the next day :-). Even our new neighbors were commenting about the punctuality and asked us for the contractors phone number for their remodeling (without seeing the interior, just based on the punctuality). We were expecting it to at least take 3-4 months and were prepared for the wait - but the entire project finished in 2 months a 1 week ( 1 week over the agreed timeline). And, the reason why it took 1 week more was since we added exterior painting and slanting roof+insulation for our new bedroom at the last moment. Since almost everything at our place was new, there were things to be fixed and reconfigured after we moved in. Anything we called and asked for was done the same day or the immediate next day. Everyone coming in and seeing the house cannot believe that it was done in 9 weeks (and within the budget) and a lot of my friends are now planning remodelling keeping Ohad and Quartz construction in mind. Ohad always says that he is "talking out loud" so that there is no confusion. It is his way of making sure that everyone is on the same page and there are no surprises. He is brutally honest and that is the best quality a contractor should have. This was the biggest remodeling we ever did and we were expecting a grind - but it was a breeze thanks to Ohad and his men. Highly recommended !!"
bathroom
bathroomremodel
stairs
stairs
wood deck

+252

Response time2 days
Recommended by87%of homeowners
Avatar for Bay Remodeling Kitchen & Bath
Bay Remodeling Kitchen & Bath
5.0(
69
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"To create my ideal kitchen, the staff at Bay Remodeling Kitchen & Bath went above and beyond. They listened to my thoughts, made useful recommendations, and transformed my kitchen into a lovely, hospitable area."
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

17 neighbors recently requested a quote
Recommended by67%of homeowners
Avatar for Cal Green Remodeling
Cal Green Remodeling
5.0(
18
)
Addition to Existing Structure - Build

Serving Lafayette, CA and surrounding areas

Approved (Corporate)

In business since 2015

Free estimates

Emergency services offered

"We hired Shay to correctly vault our home’s ceilings after they were unsafely vaulted years earlier by a licensed general contractor. Shay, their construction manager, gave us a typed, 17 page contract on the SAME DAY that he came to give us an estimate (!) The contract was highly specific, with detailed scope of work, and contained many protections for the homeowner, several which we referred to during the project. Their bid wasn’t the lowest, nor was it the highest — two came in at double and triple Shay’s estimate, one at 30% less. We were inspired by Shay’s rapidly produced and detailed contract — along with the excellent references that they gave us — to go with them, and we’re very glad that we did. They started a month AHEAD of schedule, and had reasonable progress payments as the project continued. Every step of the way their work was on time and professional, and their change orders were always necessary and reasonable. They followed the architectural and structural plans in great detail, worked well with our structural engineer, and in several instances saved us from having to rip out parts of our floor and a kitchen window through their effective negotiations with the planning office. All building inspections were passed with no difficulties, and the site was cleaned up immaculately upon completion of the project."
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California

+51

Response time1 day
Response rate100%
11 neighbors recently requested a quote
...
Showing 1-10 of 497
FAQs for addition to existing structure building service projects in Lafayette, 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 Lafayette, 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.