How much do addition contractors typically cost?
- Altadena, California Average$91,356
- Typical Range$50,000 - $91,356
- Low End - High End$8,540 - $200,000

Outdoor - Remodel, Addition to Existing Structure - Build, Additions and Remodels , and 2 more
"The process of remodeling our home went without a hitch! They were completely transparent about every step and had great communication. I will be recommending to my friends and family."
Frank A. in December 2020

Roofing, Bathroom Remodeling, Garage Conversions , and 2 more
"Green Planet Remodeling Inc. helped us with our kitchen remodeling project. We were very pleased with the entire experience. We have two infants, and Jonathan, the project lead, was very respectful of our space and needs. He kept noise and dust to a minimum, and communicated with us constantly to let us know what was happening and when. Jonathan even made sure that his workers respected our needs. Jonathan is a details guy, and takes pride in his work, which is obvious in the workmanship. He made adjustments when unexpected issues came up, and went out of his way to identify and help correct some issues that were not strictly in the scope of the work. Most importantly, we were very happy with the final product, and we would definitely hire Green Planet Remodeling Inc. again."
Alma D. in December 2019

Bathroom Remodel, Roofing, Flooring , and 2 more
"Really great experience after hiring Platinum! We had a great experience when we started to get their help regarding kitchen renovation. At first, I was very afraid with the thought of a time consuming and difficult process of kitchen remodeling. However, the project manager resolved all my concerns with the matter. This company has some mind blowing ideas and thus gave me a beautiful kitchen within very short period of time. I will always be grateful to them for their excellent services."
mike W. in October 2021

Commercial Build Out, ADU, Residential Remodeling
"Absolutely terrific! Damon and gis team were very diligent, patient and most importantly flexible. They were accomodating for changes we made during construction. Most importantly, Damon was present everyday when the work started and ended to ensure the project was moving along smoothly. They communicated clearly each chance they could get to share any updates and got in touch with us when they needed our confirmation. In the end, the project finished on time and within the budget we had allotted. I highly recommend!"
4CE5365ABF12BD708943C8F1CBCD0B3D3ACA6DA6B1BC7BAB53896A38542CBB39 F. in September 2026

Additions and Remodels
"We hired Ben to remodel our living room and kitchen, which included adding approximately 300 square feet, creating an open floor plan, and removing an enormous brick fireplace in the center of our house. From day one, Ben was amazing to work with. He was on budget, on schedule, professional throughout the entire project, and consistently anticipated potential issues before they became problems. His wealth of experience was incredibly valuable when it came to making decisions along the way, and he was always willing to offer thoughtful advice and guidance. His entire team was fantastic as well: professional, respectful, and clearly committed to doing quality work. We couldn’t be happier with the results and our experience working with Ben. We highly recommend Ben for any remodeling, building, or construction project!"
4962401849CF53F36FD7DFBFDB9CEF6837B81E394192E3F3ADBEB35C88D18EC4 D. in September 2026
Additions, Remodels, Remodels , and 1 more
"Vulcan Build helped me remodel my bathroom, did my flooring and painted my house. The work was clean and very high quality. I enjoyed the ease of communicating with Michael and his team."
Roy S. in August 2024

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

Water and fire damage restorations, Additions and Remodels.
"He built my house and is now in the process of building my second house. I highly recommend him."
Leonard B. in November 2017

Remodeling
"We hired Reuven & Co. to rebuild and remodel after some water damage to a condo. They are by far the best contractor I have ever had the pleasure of working with and I recommend them whole-heartedly. At every step of the way there was clear and consistent communication (if you know anything about contractors you know this basically is the sixth star). This project had a lot of moving pieces, and Reuven & Co. managed them so smoothly. Even the inevitable hiccups did not feel like hiccups because of their timely and incredibly competent interventions. From start to finish on this project I felt like we were in good hands. If you need something done correctly, call Reuven & Co."
60182676F379CDA371AC144E54763D3B140FE751EA4A73D64879F078C6DB36B3 0. in March 2026
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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.
Altadena Addition & Remodeling Contractors are rated 4.9 out of 5 based on 402 reviews of 402 pros.
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