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Find Addition to existing structure builders in Los Altos

Avatar for OT Bay Builders
OT Bay Builders
5.0(
109
)

Serving Los Altos, 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 rate98%
1 neighbors recently requested a quote
Avatar for Herman Construction Company
Herman Construction Company
5.0(
22
)

Serving Los Altos, CA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"Karol and his crew are very talented, efficient builders. We hired Karol to build a composite deck to compliment the pool we had installed in the back yard. It turned out beautifully. He is a great communicator and listener, prompt and reliable."
Home Addition
Home Addition
Home Additon
Home Additon
Home Addition

+25

Response time7 hrs
Recommended by81%of homeowners
Avatar for Tool Time Home Improvement
Tool Time Home Improvement
4.6(
206
)

Serving Los Altos, CA and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"I was delighted with the customer service, professionalism, and speed in responding to and completing my project for assembling a Murphy Bed. I will certainly keep this company in my 'go-to' contacts list and highly recommend you give them a try! Thanks so much!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+16

Response time1 day
15 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Future Vision Remodeling
Future Vision Remodeling
4.9(
57
)

Serving Los Altos, CA and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"Future Vision Remodeling is one of the most professional companies I have dealt with. Not only are the project managers punctual and knowledgeable, their office staff are diligent and handle any problem to the best of their ability. I would highly recommend hiring them for any project."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+555

Response time7 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Skytech Builders
Skytech Builders
5.0(
21
)

Serving Los Altos, CA and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

"As most of us know when we do a remodeling project, it is real hard to find good and honest people to complete your project. Fortunately, I found Leo and Yonathan from SkyTech Builders to help me with remodeling and repairing two of the bathrooms in my family's 4-Plex building. They were very honest, polite and helpful each step of the process from start to finish. The are very patient and suggested materials and design but always thinking about quality and your budget. Overall the experience with Leo and Yonathan was top notch and we were very satisfied with the finished product. We will definitely be using Sky Tech Builders for our future construction projects."
Master Bathroom Remodel in San Jose.
Kitchen Remodel in San Mateo
Kitchen remodeling in Fremont
Master Bathroom Remodel in San Jose.
Kitchen Remodel in San Mateo

+63

Response time1 day
31 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Herman Construction Company
Herman Construction Company
5.0(
29
)

Serving Los Altos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Warranties offered

"Karol worked as general contractor for our home remodel, which involved adding a second story on an existing single family home. Karol managed the project very skillfully, keeping it within budget and our timeline. I was particularly impressed by his integrity and we eventually came to trust him for looking out for it interests. When our initial drywall subcontractor was overbilling us and frequently absent from the job, Karol promptly called out the actions and terminated the contact. He helped us find good workarounds for some issues involving our kitchen cabinets and a new outdoor deck."
Second floor House addition in progress. San Jose
second floor house addition before San Jose
Second floor house addition complete
second floor house addition in progress
2 neighbors recently requested a quote
Recommended by72%of homeowners
Avatar for BE HOME REMODELING INC
BE HOME REMODELING INC
4.9(
66
)

Serving Los Altos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"After they redid our counter tops and island, we had them paint out cabinets and build shelves up to the ceiling. The communication was on point this time and the results speak for themselves. Would definitely recommend them to anyone for any home project."
full house remodeling
full house remodeling
full house remodeling
full house remodeling
full house remodeling

+31

Response time1 day
Response rate98%
630 neighbors recently requested a quote
Avatar for Zacarias Remodeling Construction
Zacarias Remodeling Construction
5.0(
33
)

Serving Los Altos, CA and surrounding areas

Approved

In business since 2009

Free estimates

Customers say: True professional

"Zacharias Remodeling Construction did an outstanding job remodeling my mom‘s kitchen in July 2025. Oscar, the contractor, was professional, responsive, and easy to work with from start to finish. His team was meticulous with every detail and always arrived on time which made the entire process, smooth and stress-free. This was especially important to me as I had experienced a contracting company in the past where the workers did not show up on time (or at all), cut corners, and it made for a lousy 2 months. The finished kitchen looks beautiful and without hesitation, Zacarias remodeling construction will be my first call for future projects."
Remodeling - General Project
Remodeling - General Project
Remodeling - General Project
New kitchen, bedroom and bathroom
Remodeling - General Project

+50

18 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Bay Easy Construction
Bay Easy Construction
4.3(
154
)

Serving Los Altos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Warranties offered

"Did just what I needed - added a 240 V circuit to my existing subpanel using liquid waterproof conduit, done in 2 hours, reasonable quote for the work, two thumbs up, would hire again! They also noticed an existing outlet that was not properly sealed near the area they were working and sealed it up!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time10 hrs
8 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Arroyo Brothers Construction, LLC
Arroyo Brothers Construction, LLC
5.0(
10
)

Serving Los Altos, CA and surrounding areas

Approved

In business since 2010

Free estimates

Small jobs welcome

"These folks are conscientious, honest contractors. I have hired then for many years and I am never disappointed in the workmanship and quality. They always back their work and came back to fix something that they worked on. An added bonus is that they are just great people. I would highly recommend them and I am picky."
Los Gatos Remodel
Los Gatos remodel and addition
Los Gatos remodel and addition
Los Gatos remodel and addition
Santa Cruz Bathroom

+8

Response time12 hrs
Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in Los Altos, 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 Los Altos, 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.