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

Avatar for Herman Construction Company
Herman Construction Company
5.0(
23
)
Addition to Existing Structure - Build

Serving Stanford, CA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"Karol is a very nice guy to work with. He is approachable, easy to communicate with. He goes through the project from end to end on our first visit, explain how he would build the frame, cut the wood, the timeline. He also finds a stone guy and coordinates the work. When actually doing the work, he puts cardboards on our floor to avoid scratching. Upon request, he also did a prototype for us, and when we change our mind to use a different style, he redoes the bulk of the project. I would recommend Karol to anyone who needs carpenter work!"
Home Addition
Home Addition
Home Additon
Home Additon
Home Addition

+25

Response time7 hrs
Recommended by78%of homeowners
Avatar for Skytech Builders
Skytech Builders
5.0(
21
)
Addition to Existing Structure - Build

Serving Stanford, 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
Response rate100%
12 neighbors recently requested a quote
Avatar for OT Bay Builders
OT Bay Builders
4.9(
127
)
Addition to Existing Structure - Build

Serving Stanford, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"Our basement went from a dark storage area to a cozy family room and home office. The remodel was smooth from start to finish. Great communication, thoughtful design ideas, and skilled workmanship throughout."
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 by56%of homeowners
Avatar for Tool Time Home Improvement
Tool Time Home Improvement
4.6(
208
)
Addition to Existing Structure - Build

Serving Stanford, CA and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"Tool Time was absolutely fabulous. Extremely professional and thorough. From beginning until end, everything was outstanding. No detail was overlooked. This was a step down for my mother‘s home, she couldn’t be happier. It looks as though it was installed at the same time the other banister was. 100% GREAT JOB !!!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+16

Response time1 day
Response rate100%
10 neighbors recently requested a quote
Avatar for Zacarias Remodeling Construction
Zacarias Remodeling Construction
5.0(
33
)
Addition to Existing Structure - Build

Serving Stanford, 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

18 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for On Design & Remodeling INC
On Design & Remodeling INC
5.0(
46
)
Addition to Existing Structure - Build

Serving Stanford, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Credit card accepted

"We just finished to build an ADU in the backyard with ON Design & Remodeling. In the beginning we met Aviv and he guided us with his team along the design process. They helped us to get the permit faster and choosing all the visible materials before starting the work. During the construction we received weekly updates regards the process so we always knew what to expect. We build the unit for my parents and they are so happy with their new small home, and to share the yard together with us. Currently we are in the planning process to remodel our main resident kitchen with ON team, so obviously we are so happy working with this amazing team."
The Willow Oaks project
First floor kitchen and stairs
Master Bathroom remodeling
Open concept Kitchen
The Willow Oaks project

+421

Response time2 days
Response rate100%
28 neighbors recently requested a quote
Avatar for Clever Design and Remodeling, Inc.
Clever Design and Remodeling, Inc.
5.0(
22
)
Addition to Existing Structure - Build

Serving Stanford, CA and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"My kitchen has been utterly transformed, in the most wonderful way by the great staff and crew at Clever Design and Remodeling. Roy came to my home to give me an estimate, describe the whole process, and was very clear and concise in his explanations. He answered all my questions with great patience and was available throughout the installation process by phone or email in case I needed additional info. We also needed a double vanity in our bathroom which he custom built for us. When they were done with the vanity, painting, and the cabinets, we decided to get the same countertops that they guys used in the bathroom for our kitchen and redo the backsplash as well. They were all super easy to communicate with. All the guys that we worked with were very professional, and they cleaned up, so we could use the kitchen even with it torn apart. Overall, the final result is everything turned out gorgeous."
Kitchen
Kitchen
Master bathroom
Living Room
Kitchen

+270

Response time12 hrs
Response rate85%
5 neighbors recently requested a quote
Avatar for BUILDERS GROUP & DESIGN INC
BUILDERS GROUP & DESIGN INC
5.0(
21
)
Addition to Existing Structure - Build

Serving Stanford, 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

7 neighbors recently requested a quote
LEES PRO BUILDER
4.6(
47
)
Addition to Existing Structure - Build

Serving Stanford, CA and surrounding areas

Approved

In business since 1989

Free estimates

Warranties offered

"I undertook a comprehensive, whole-house renovation in order to sell my older home. Although Mr. Lee runs his business out of San Jose, he willingly traveled all the way to my residence in Sacramento to take on the project, delivering highly satisfactory results within a remarkably short timeframe. From the initial contract signing through to the final stages of construction, he executed the work with such perfection and professionalism. Furthermore, thanks to the renovation, I was able to sell the house for a significantly higher price. I wholeheartedly recommend him to anyone. He is a diligent and exceptionally honest contractor."
Photos of my work
Photos of my work
Photos of my work
Photos of my work
Photos of my work

+8

3 neighbors recently requested a quote
Recommended by77%of homeowners
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FAQs for addition to existing structure building service projects in Stanford, 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 Stanford, 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.