How much do addition contractors typically cost?
- Folsom, California Average$47,913
- Typical Range$23,750 - $45,000
- Low End - High End$13,000 - $120,000

10+ years of experience, Deck or Porch - Build or Replace
"Our bathroom remodel came out amazing! Angel and his team were professional, easy to work with, and delivered high-quality workmanship. They finished on time, kept everything clean, and the final result exceeded our expectations. We highly recommend The AI Construction!"
F96B28548CDE7A2C7C81AEB6C20508487197143A4C17A097D3766BC7A9F56ED3 B. in August 2026

Porch, Framing, Patio
"If you are looking for a knowledgeable, hardworking and trustworthy company, not to mention a kind, respectful, good communication and good person, Vitaliy owner of AVD Construction is who I highly recommend. Our project started as an owner build ADU garage conversion. We interviewed 3 subcontractors for each initial trade. Vitaliy was initially interviewed for framing, it was immediately evident that he was very knowledgeable about construction and codes. His pricing was fair and within other quotes, so we hired him. After a couple visits, and reviews of blueprints we discovered that Vitaliy was a general contractor. Since we were early on in our project, we would have him bid at each step, which we would choose him every time. As the project progressed Vitaliy would catch errors, by other trades and engineering. Most of these catches saved us time and money. There were times that he would fix some of these errors to help us out and save time. There is a specific example that comes to mind. Concrete sub had just poured their concrete, they took off the garage side door and our larger garage door wouldn't close. I was feeling very uneasy about having access to our garage and home from the street. Vitaliy pulled the door out of the pile of trash, cut it down to fit in opening, put hinges back on and wired garage door closed. I think he could see how happy and grateful I was, I remember saying "I think I'll be able to sleep tonight." Vitaliy said "treat other people's home like it's your own." That really stuck with me. Vitaliy made suggestions along the way, that made sense and often was overlooked by our novice eyes. He explained things, so that we could understand, he taught us so much. We are so grateful and lucky to have found him. We went on to hire AVD Contruction to frame, drywall, tape/mud walls, completely tile 2 bathrooms (floors and showers), Install 2 French doors, windows, all vents, stucco entire sides where new doors and windows were installed, plumb our kid's bathroom. Vitaliy was there for every inspection. Every job he took on, he and his workers were respectful, communicated each step of the way and they always treated our home like it was their own. If I had to do it again, I would have hired AVD Construction to do the whole project."
Trudy D. in November 2023

Custom Home Builds, Additions / ADUs, Whole House Remodeling , and 2 more
"HouseIdea's patient and informative approach made the remodeling process easy for first-time homeowners like us. Their attention to detail and commitment to our preferences and lifestyle resulted in an outstanding whole-house remodel."
Corinne W. in March 2023

Additions, Kitchen Remodels, Major Renovations , and 1 more
"Tim Mortenson did a great job on my deck from start to finish. He made some great recommendations on deck style, and materials, and was totally flexible with his schedule,since I had to coordinate with another contractor who was building a sunroom on top of the deck. He put in a lot of effort and detail into the final product, and it looks great. I completely recommend him and will use Streamline Builders again for my next project."
Edward B. in January 2018

Doors and Multiple Windows Installation, Interior Trim Decorative Moldings- Install and Repair, Arbor, Pergola or Trellis - Build Custom , and 7 more
"Jon and his guys were hard workers, and built and installed two gorgeous decks for us. Excellent quality, great crew, fantastic communication. Highly recommend. Thank you so much!"
Julie M. in October 2022

Kitchen - Remodel, Bathroom - Remodel, Structural updates and changes , and 4 more
"Attention to detail was very good, execution was slow, but worked well with our schedule. End results were excellent."
Loren R. in December 2023

Quality finishes, tile, wood, marble, quartz, travertine, stone
"Michael and team did such an amazing job on our bathroom remodel. They took our tiny, dysfunctional bathroom and turned it into a true master bathroom oasis in a short amount of time during the holiday season. When they had the space down to the studs, Michael sat down with us and discussed in detail the best possible use of the space and we couldn’t be happier with our final decision after going through the options. Michael was great at communicating and we still stay in touch to this day, which we truly appreciate. Great team who does great work and I will absolutely be giving Waters Construction a call for any and all future home renovations. I’ll let the pictures do the rest of the talking."
E37772FA2E71CBB442874E8BC303B297B35A3863D80871CF215EE1A32E2506D8 7. in November 2025

New and remodeled decks, New home construction, Home restoration , and 7 more
"Mark was / is very attentive to our needs and wants. We gave him a hard timeline and he held to it. As challenges came up, which they always do in a project of this size, Marks experience was on full display. He was always calm and solved the problems. I would highly recommend Mark to all of our friends for any of their project. In fact, we have already recommended him to a few people."
Rob T. in September 2018

"We hired Joe to do a very large project which included a major kitchen remodel, building a 400 sq foot vaulted addition with skylights, flooring across the entirety of the main space, full 1000 square foot trex deck with accommodation for a hot tub, and side patio. Joe is a 1 man shop. He did everything from framing, drywall, electrical, insulation, roofing, flooring, cabinet installation, and finish work. He was very easy to communicate with and worked with us on change orders as the project developed/progressed. Errors were very rare and quickly corrected when they occurred. This is our 2nd time hiring Joe for a big project and have hired him for other small projects. We would gladly have Joe work for us again on an y future project."
77A741F7C013D0DF2896B5C18AC1BD296C5872927BEC659B3077674766FC33DF 2. in May 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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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.
Folsom Addition & Remodeling Contractors are rated 4.8 out of 5 based on 112 reviews of 112 pros.
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