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Find Addition to existing structure builders in Napa

Avatar for BUILDERS GROUP & DESIGN INC
BUILDERS GROUP & DESIGN INC
5.0(
21
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"Our bathroom was outdated and unattractive, so we wanted to hire a professional to help with the design and get the job done right. We found Builders Group on Angie, and Mike came out to give us a quote. What set Mike apart from the others was his attention to detail and how great he was with people. We decided to hire him, and we were happy with our choice from the very beginning."
South San Francisco
South San Francisco
South San Francisco
South San Francisco
South San Francisco

+139

8 neighbors recently requested a quote
Avatar for Cerletti & Kennedy Design-Build
Cerletti & Kennedy Design-Build
4.3(
109
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1987

Free estimates

Warranties offered

"Worked with Robert and his team to build our ADU. His experience and knowledge was helpful throughout. His team is professional and made sure all inspections passed. Would highly recommend working with him."
in the beginning
 Finished!
Wish I had a good camera
 Eat in kitchen, new wood flooring, beam ceiling
 Chefs table

+45

Response time3 days
19 neighbors recently requested a quote
Recommended by76%of homeowners
Avatar for Build Atlas
Build Atlas
5.0(
13
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Emergency services offered

"If you’re thinking about getting a new roof, definitely go with Build Atlas. I’m in my mid-20s and had no idea where to even start, but a neighbor recommended them and I’m so glad that they did! The whole team was super friendly, down-to-earth, and made the entire process way less stressful than I imagined. They showed up when they said they would, kept everything clean, and finished faster than I expected. Plus, the roof looks fantastic — it’s like my house got a facelift! It’s rare to find a company that’s this easy to work with!"
Updated Tile Flooring
Updated Vanity & Fixtures
Added Shelving & Accessories
Newly updated kitchen
Outdated Kitchen

+19

Response time5 hrs
Recommended by76%of homeowners
Avatar for J R A Construction
J R A Construction
5.0(
12
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

In business since 2005

Free estimates

Small jobs welcome

"Excellent experience from start to finish. Remodeled our bathroom ahead of schedule with incredible attention to detail. Very respectful of our home, and communicative throughout the entire process. Rare to find a contractor so punctual and dedicated to quality. Hghly recommend them."
Full kitchen remodel
Bathroom remodel
All kitchen remodel
All kitchen remodel
Concrete patio

+51

Response time2 days
3 neighbors recently requested a quote
Recommended by8%of homeowners
Avatar for A.M.P. Construction
A.M.P. Construction
5.0(
6
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

In business since 1999

Free estimates

"I highly recommend Robert at A.M.P. Construction for all construction work. He has worked on several projects at my house including remodeling my kitchen and bathrooms. I truly enjoy working with Robert. He is personable, responds promptly, arrives on time, offers great suggestions, does exceptional work, and is always honest with the cost. He is the only contractor I want to work with."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Alpine Premium Construction
Alpine Premium Construction
5.0(
7
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

Free estimates

Offers commercial services

"We had a great experience with Alpine Premium Construction! They remodeled multiple rooms in our home, and everything turned out beautifully. The team was professional, reliable, easy to communicate with, and paid great attention to detail. The entire process went smoothly, and the quality of their work exceeded our expectations. We’re very happy with the results and would definitely use them again. Highly recommend!"
4 neighbors recently requested a quote
Patton Construction
4.3(
25
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

In business since 1982

Free estimates

Customers say: Quick response

"Cal Patton is THE ABSOLUTE BEST. The work he did remodeling my garage into a studio apartment was done with quality workmanship, professional care, and great communication. Now, two years later, I am adding a bathroom and had some questions. Cal answered my texts and calls immediately and, even though he had several other projects going on, he literally jumped in the car and came to advise another contractor to set him straight. (I wish Cal could be doing the bathroom addition but he was booked currently.) I highly recommend Cal. He's got your back, he is a true pro, and a great human being."
custom home hall bath
custom home dining room
custom home family room
custom home
custom home

+9

Response time2 days
6 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Deleon E Hijo Construction
Deleon E Hijo Construction
5.0(
6
)
Addition to Existing Structure - Build

Serving Napa, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2001

Free estimates

Offers commercial services

"Absolutely a beautiful job of New flooring, major painting, Electrical. & misc repairs. Father & son can do everything A home or property requires. They have cared for my large Property for years with the Utmost care, skill & consideration. They really do Treat their clients as family. I give them the highest rating In all they do. Very hard working And trustworthy in every way. Also extremely kind & generous In their overall approach to Working with you. I’m so Grateful they have done such Excellent work for me. Don’t Hesitate to contact them for Your next project ….you will Be very happy you did !’ They are totally trust worthy., And have treated me as family. And have truly been available When I needed them in any Emergency breakdown. They are an amazing team & I’ve been so hateful"
Apartment Remodel
Apartment Remodel
Apartment Remodel
Apartment Remodel
Apartment Remodel

+6

Response time4 hrs
Response rate100%
7 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Napa, 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 Napa, 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.