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Find Addition to existing structure builders in Sonoma

Avatar for Qualified Builders Construction

Qualified Builders Construction

5.00(
2
)
Approved Pro

Qualified Builders Construction

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

Customer satisfaction is what determines our success, which is why we take a hands-on approach. When interacting with Qualified Builders Construction, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Excellent company! Phenomenal work for the price and I am very happy with the fence they built!"

Mark L on January 2023

Customer satisfaction is what determines our success, which is why we take a hands-on approach. When interacting with Qualified Builders Construction, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Excellent company! Phenomenal work for the price and I am very happy with the fence they built!"

Mark L on January 2023


Avatar for Grid Design Build

Grid Design Build

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Grid Design Build

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
4 years of experience
Free onsite estimate

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. 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!

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. 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!


Concept, Design, Develop, Inc.

5.00(
4
)
Approved Pro

Concept, Design, Develop, Inc.

5.00(
4
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"They did an excellent job! We definitely would want to use them again. They just replaced the siding on the sun beaten part of our house. It looks much better than before and matches the rest of the house perfectly. They were responsive and got things done in a timely manner. I recommend vey highly."

Doug W on May 2024

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"They did an excellent job! We definitely would want to use them again. They just replaced the siding on the sun beaten part of our house. It looks much better than before and matches the rest of the house perfectly. They were responsive and got things done in a timely manner. I recommend vey highly."

Doug W on May 2024


Millstreet Builders

5.00(
2
)
Approved Pro

Millstreet Builders

5.00(
2
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

MILLSTREET BUILDERS is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Craig was great to work with! Kept on time and on budget"

Stacey R on November 2023

MILLSTREET BUILDERS is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Craig was great to work with! Kept on time and on budget"

Stacey R on November 2023


Avatar for Logan - Enos Construction, Inc.

Logan - Enos Construction, Inc.

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Logan - Enos Construction, Inc.

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
9 years of experience
Free onsite estimate

With over 19 years of experience as a General Contractor, Logan - Enos Construction, Inc. is who you need to take care of your home. We handle everything from the initial consultation to making sure your property looks perfect every single time. We will always treat your property as we would treat our own, and you will be surprised how simple and easy our team will make the whole process seem. Give our team a call today. We're looking forward to working with you!

With over 19 years of experience as a General Contractor, Logan - Enos Construction, Inc. is who you need to take care of your home. We handle everything from the initial consultation to making sure your property looks perfect every single time. We will always treat your property as we would treat our own, and you will be surprised how simple and easy our team will make the whole process seem. Give our team a call today. We're looking forward to working with you!


Avatar for Sidex Construction

Sidex Construction

5.00(
8
)
Approved Pro

Sidex Construction

5.00(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
68 local quotes requested

Just a down to earth team of hard working men looking to make an honest living. Family owned and operated. At Sidex, we take pride in being Sacramento's go-to destination for premium siding, decking, and windows. Our mission is simple: to elevate the beauty and functionality of your home. With a dedication to craftsmanship and customer satisfaction, we offer a wide range of high-quality products and expert services tailored to your unique style and needs. Whether you're looking to enhance your home's curb appeal, increase energy efficiency, or simply elevate your living space, Sidex is here to make your vision a reality. Experience the Sidex difference and transform your house into the home of your dreams.

"Sidex Siding and Decking did an incredible job on my deck! The quality of their work is evident in every detail, and the materials they used are built to last. The team was professional, efficient, and easy to work with. They delivered exactly what I wanted, and the final result looks amazing. All my family and friends absolutely love the new 25x30ft deck! Highly recommend them for anyone needing a well-crafted deck!"

Rueben S on March 2025

Just a down to earth team of hard working men looking to make an honest living. Family owned and operated. At Sidex, we take pride in being Sacramento's go-to destination for premium siding, decking, and windows. Our mission is simple: to elevate the beauty and functionality of your home. With a dedication to craftsmanship and customer satisfaction, we offer a wide range of high-quality products and expert services tailored to your unique style and needs. Whether you're looking to enhance your home's curb appeal, increase energy efficiency, or simply elevate your living space, Sidex is here to make your vision a reality. Experience the Sidex difference and transform your house into the home of your dreams.

"Sidex Siding and Decking did an incredible job on my deck! The quality of their work is evident in every detail, and the materials they used are built to last. The team was professional, efficient, and easy to work with. They delivered exactly what I wanted, and the final result looks amazing. All my family and friends absolutely love the new 25x30ft deck! Highly recommend them for anyone needing a well-crafted deck!"

Rueben S on March 2025


Homes West Construction

2.75(
3
)
Approved Pro

Homes West Construction

2.75(
3
)
Approved Pro
24 years of experience
Free onsite estimate

Homes West Construction provides top quality work in the Napa area specializing in structural repairs, remodels and new construction. Our professional crew is proficient in all areas of the building process and are dedicated to delivering an excellent product at a competitive price and in a timely fashion.

"Great contractor. He helped to design and pick out fixtures. Excellent work doing my front porch in three weeks."

Robert P on December 2020

Homes West Construction provides top quality work in the Napa area specializing in structural repairs, remodels and new construction. Our professional crew is proficient in all areas of the building process and are dedicated to delivering an excellent product at a competitive price and in a timely fashion.

"Great contractor. He helped to design and pick out fixtures. Excellent work doing my front porch in three weeks."

Robert P on December 2020


Avatar for RG Construction

RG Construction

5.00(
8
)
Approved Pro

RG Construction

5.00(
8
)
Approved Pro
13 local quotes requested
2026 years of experience

We have been in the construction industry for over 10 years. From building ADUs, high-end kitchen remodels, bathroom remodels and home extensions, we have done just about everything under general construction. Our company prioritizes safety, quality and transparency.

"Me and my wife decided recently to get our kitchen remolded. After some time searching for the right guys to do the job we settled on RG Construction. Richard, who is the owner, is a great guy and super informative. He never left any question unanswered or left us uncertain about anything. His crew works quick, and they pay attention to the tiniest detail. They absolutely are worth every dollar and I would recommend RG Construction to any homeowner, and I for sure will be giving them a call back for any work I need done in the future. Me and my wife are absolutely in love with our remodel."

Jesse O on November 2025

We have been in the construction industry for over 10 years. From building ADUs, high-end kitchen remodels, bathroom remodels and home extensions, we have done just about everything under general construction. Our company prioritizes safety, quality and transparency.

"Me and my wife decided recently to get our kitchen remolded. After some time searching for the right guys to do the job we settled on RG Construction. Richard, who is the owner, is a great guy and super informative. He never left any question unanswered or left us uncertain about anything. His crew works quick, and they pay attention to the tiniest detail. They absolutely are worth every dollar and I would recommend RG Construction to any homeowner, and I for sure will be giving them a call back for any work I need done in the future. Me and my wife are absolutely in love with our remodel."

Jesse O on November 2025


Avatar for Mendoza Construction

Mendoza Construction

4.67(
3
)
Approved Pro

Mendoza Construction

4.67(
3
)
Approved Pro
Customers say: Quick response
21 local quotes requested
4 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Great work and very easy to work with. "

Matthew G on November 2025

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Great work and very easy to work with. "

Matthew G on November 2025


Avatar for Redwood Valley Construction, Inc.

Redwood Valley Construction, Inc.

4.85(
24
)
Approved Pro

Redwood Valley Construction, Inc.

4.85(
24
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
12 years of experience

Here at Redwood Valley Construction, Inc., we sustain our business on quality and integrity. We are experts in our trade and our commitment to quality from beginning to end of your project. We look forward to earning your business. Call us anytime with any questions you may have. Thanks for you time and have a great day.

"Overall our experience was fine until the end. They left several issues with our remodeled bathroom that we had to pay other professionals to redo. Unprofessional and messy at the end. We had to pay someone to repaint our ceiling and bedroom walls after they used the wrong paint color (I gave them the exact paint color) and you could see the difference in shades because they left it half covered. We also had to have a plumber come fix the hot water pressure in the brand new sink, the brand new toilet handle, repair the brand-new sink leak and other technical issues that shouldn't happen with a NEW remodel. Overall they did fine, but when you pay an exorbitant amount everything should be left in working order and pristine. I would not use their services again, and was disappointed by the way they left things."

Bridget C on March 2025

Here at Redwood Valley Construction, Inc., we sustain our business on quality and integrity. We are experts in our trade and our commitment to quality from beginning to end of your project. We look forward to earning your business. Call us anytime with any questions you may have. Thanks for you time and have a great day.

"Overall our experience was fine until the end. They left several issues with our remodeled bathroom that we had to pay other professionals to redo. Unprofessional and messy at the end. We had to pay someone to repaint our ceiling and bedroom walls after they used the wrong paint color (I gave them the exact paint color) and you could see the difference in shades because they left it half covered. We also had to have a plumber come fix the hot water pressure in the brand new sink, the brand new toilet handle, repair the brand-new sink leak and other technical issues that shouldn't happen with a NEW remodel. Overall they did fine, but when you pay an exorbitant amount everything should be left in working order and pristine. I would not use their services again, and was disappointed by the way they left things."

Bridget C on March 2025

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FAQs for addition to existing structure building service projects in Sonoma, 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 Sonoma, 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.