How much do addition contractors typically cost?
- Campbell, California Average$104,095
- Typical Range$45,800 - $125,000
- Low End - High End$14,000 - $242,000

Garage Remodels, Kitchen Remodels, Bathroom Remodels , and 1 more
"I reached out to Rose Remodeling & Design for a new construction project, and they didn?t disappoint. Their professionalism and attention to detail were consistent from start to finish. I felt well taken care of every step of the way."
97F3BFD3242460EB09F45055A6142A6E0734B1EE40F511CD04CFDE3E57254C87 0. in December 2025

Remodel Kitchen, Full house remodeling and reconfiguration, Additions to Existing Structure , and 2 more
"ON Design & Remodeling team exceeded our expectations with their kitchen remodeling services. Thanks to Razs remarkable project management skills, the remodeling stayed right on schedule and was completed without any delays. They were professional, efficient, and the end result is a dream kitchen we absolutely love."
Shavi S. in December 2023
Doors, Carpentry, Plumbing , and 1 more
"Had him rebuild an old patio cover in my yard. All we kept were the posts and two beams. Replaced all else. Came out very nice. Couple months later had him do some porch railing and window sill repairs on a rental house my mother owns. Nice work, very fair price. Will definitely use him again."
bruno C. in December 2022

Addtions Remolding
"I am so happy I hired Unique Home Design & Remodeling for my bathroom remodel. I had never worked with this company but hen I saw my friends remodeled bathroom I asked him for contact and he gave me contact of this company. They were honest from start to finish, my new bathroom looks even better than from my friends and price was reasonable. Highly recommend!"
Martin B. in September 2019

Excavation, Remodeling & Renovations
"R&B MASTER CONSTRUCTION INCdid a fantastic job completely remodeling our master bathroom. They had very clear communication, friendly and knowledgeable staff and provided excellent work and service. We are very happy with the work they did and would use them again."
71AF326A3FD98240E216F6BB657E168D06F150A62B8658184005842C53283B70 D. in September 2026

Full Service Plumbing Company, Full Service Electric Company, Full Service Surveillance Needs , and 2 more
"Great costumer service. Was more then helpful with getting our project done on time. Even finished ahead of schedule. Would highly recommend using this company they are flexible with your needs."
Garrett D. in August 2021

Bathroom Remodels, Kitchen Remodels, Additions , and 2 more
"Excellent communication. Execution was outstanding. Very able people worked hard and long and got the job done in a most timely manner. Detail work was first rate. When something needed to be adjusted that was done. Some of the adjustments were just amazing. (We had a built in Murphy Bed installed that did not quite fit the space. A tapered base board kept this from looking awkward. Amazing!) Also all the folks were very nice. Add reasonable pricing and there is nothing else to ask for. I liked them so much that when my daughter did a major remodel, I recommended Baja, and she too has been super happy with the results. Where I come from, passing a vendor on to family is the highest form of praise."
ted A. in October 2018

"Our goal was to build a structurally safe garage storage loft. Juan and Julian were a great team to work with. They were very professional and organized- they gave us a quote and clearly communicated what the plan would look like from beginning to end. They guided us on the items that we needed to buy prior to starting the work in order to complete the project within the estimated time. They suggested modifications that were minor fixes but made the layout make more sense in terms of placement. Their crew finished a day ahead of schedule. They kept a clean work site and the quality of the results were great. I would gladly work with them on another home project in the future!"
EBABC7A0D13C4DE5CA11356AAF0B818C12DC9BBF30D09A9E51A909FD2310CA9C D. in April 2025

New Construction, Additions and Remodels, 3D Design & Engineering , and 2 more
"We had an excellent end-to-end experience with IBuilders Design and Build. We hired them for our addition to our home plus other interior remodeling. Let me start off by saying we love the new addition to our home and couldn't be happier with the results. Alan guided us throughout the process of planning, designing and choosing the right materials. Overall all promises and deadlines have exceeded our expectations. I'm very grateful and thankful for all their help and quality work. Will definitely reach out again for future projects I already have in mind. Highly recommended!"
Sharon G. in November 2021
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Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.
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Your research doesn’t stop here. Once you’ve found a few prospective companies, make an call to ask a few questions about work history, licensure and more:
In most cases, the responses you get to these three questions will give you a very good idea of the right pro for your project. If you have more than one front-runner, these additional questions can help you narrow it down.
Any good contractor will answer these questions, and most will appreciate dealing with a client that takes such an active interest in finding good service. On the other hand, if a contractor gives you a hard time with these questions, you probably want to find someone else.
Campbell Addition & Remodeling Contractors are rated 4.9 out of 5 based on 404 reviews of 404 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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