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

Avatar for RUBEN OLIVO BUILDER
RUBEN OLIVO BUILDER
5.0(
6
)
Addition to Existing Structure - Build

Serving Guerneville, CA and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"We could not be happier with the remodel of our dated, dysfunctional, tiny kitchen. Ruben was very professional, friendly and a real problem solver. He continually went above and beyond and we simply cannot say enough about what a great contractor he is. We had an unforeseen deadline and he and his staff worked very hard to make sure the job was finished. Their work was meticulous and the final result outstanding. Thank you Ruben and staff!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response rate100%
Recommended by100%of homeowners
Avatar for First String Home Improvement
First String Home Improvement
5.0(
9
)
Addition to Existing Structure - Build

Serving Guerneville, CA and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"First String Home Improvement Company installed my bathroom door, and the results exceeded my expectations. I’m very picky when it comes to details, but with Skyler I didn’t have to supervise him at all—his professionalism and expertise were evident throughout the entire process. On top of that, he’s incredibly enthusiastic about what he does, which made the experience even better. This company is my go-to, and I’ll def hire them again!"
Mailbox Repair
Mailbox Repair
Fence Install
Door Fix
Door Fix

+7

Response time2 hrs
Response rate95%
Recommended by85%of homeowners
Avatar for Royal Premium Homes, LLC
Royal Premium Homes, LLC
5.0(
3
)
Addition to Existing Structure - Build

Serving Guerneville, CA and surrounding areas

Approved

In business since 1991

Free estimates

Warranties offered

"Patrick Royal from Royal Premium Homes did an excellent job. My bathroom looks amazing. I could not be happier with it. He took the time to do the job correctly. Very trustworthy. I would hire him again."
Response time12 hrs
Response rate97%
2 neighbors recently requested a quote
Avatar for Morgan C Winslow A Partnership
Morgan C Winslow A Partnership
5.0(
1
)
Addition to Existing Structure - Build

Serving Guerneville, CA and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

Morgan C Winslow A Partnership 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!!!!! \n

Custom Post and beam home/built 2006 Dillon Beach CA. Marin County
Farrell Project.
Response time2 days
10 neighbors recently requested a quote
Big River Builders, Inc.
3.3(
3
)
Addition to Existing Structure - Build

Serving Guerneville, CA and surrounding areas

Approved

In business since 1979

Emergency services offered

Offers commercial services

"The employees were great. A couple of days there was only 1 man on the job due to illness. The company did not replace him, so the 1 man had to work alone, slowing down the completion of the project. Art and Johnny were great to work with. Communication with the office was a little lacking, but overall we are happy with the work."
Main House
Garage
Response time2 days
7 neighbors recently requested a quote
Recommended by100%of homeowners
Palm Construction, Inc.
5.0(
90
)
Addition to Existing Structure - Build

Serving Guerneville, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"We worked with Ali (sales manager) and Tony (project manager), who took the time to design a project that made sense for our property and our budget, made a number of suggestions and recommendations and were never pushy or tried to "sell" us on something. The crew really went above and beyond to provide top quality workmanship and overall we were in very good hands. Highly recommended!"
Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in Guerneville, 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 Guerneville, 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.