How much do addition contractors typically cost?
- Oakland, California Average$98,346
- Typical Range$40,000 - $250,000
- Low End - High End$5,800 - $300,000

Renovations, Landscaping, Roofing , and 1 more
"Our kitchen remodel with O.T Bay Builders went perfectly. Avi, our project manager in Orange County, kept us updated every step of the way. The craftsmanship and attention to detail are outstanding. Weâ re thrilled with our new kitchen"
3BDF77F8ECF77A73B1017CC3A6F497F76A3F5AAB954671706D50CC2B281CD1E3 C. in November 2024

Foundation Repair, Residential and Commercial Additions, Roof replacement , and 2 more
"He did an amazing job everything like I imagined he brought it to reality definitely recommend"
A1B76D021CC020AEA443896AF7EFDD0B895D2D6112DD10D7C9FC411DF3603391 5. in July 2026

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

"J & B homes transformed my kitchen from an old, outdated, and quite ugly space into a place my wife and I love to cook and spend time together in. The customer service was top notch as we collaborated on picking flooring, cabinets, countertops, light fixtures, and new appliances. They also worked hard to get the backsplash tiles perfect which has got to be one of our favorite features of the remodel. Amazing efficiency in completing the work on time, with awesome communication on the cost for us so we could budget correctly. I would recommend J & B homes to any of my friends or family, and would absolutely use them again in a future home project."
5EDA95CE0649E173966BF5026880D15FB1CBEF6D2BC33533DB879082D05C26AA 5. in March 2026
"Zacarias Remodeling Construction did an amazing job on my brand new kitchen! I wanted my kitchen to be done before Christmas and they worked above and beyond to complete it! Oscar (the Owner) would come to see how the project was progressing and inspect the finished work and made sure if we had any concerns or questions. The workers are professional and hard workers!! They also made sure everything was clean before leaving for the day. Suzanne (Estimator/Designer) was there 100% of the time for questions, advice and opinion on the design. Awesome to work with! I am very happy with my kitchen and highly recommend them!"
919EF96342BC9E72B8B2C6A8ABF99383ACB49BD1ABCB84C3FD41D1DFCA0E4803 4. in February 2026

Electrical, Kitchen Remodeling, Whole House Remodeling/Get Market Ready , and 3 more
"I have already recommended them to friends. Best value for price!"
Aaron C. in December 2016

Additions to Existing Structure, Custom Home Builder, Kitchen - Remodel
"I hired Hagenbach Construction based on a referral from my cabinet vanity vendor who I've done business with 4 years prior. John, his wife Amy, and his crew were AWESOME and the finished bathrooms can easily make an HGTV remodel or magazine feature. They were far better than I ever imagined. I wish I can post some photos here, but hopefully, the finished bathrooms will grace his website. My project involved two bathroom remodels - a master and guest (and the only two in my single story home) over a period of 7-8 weeks. The master bathroom was a total demo of the existing 200 sq. ft. space, on a slab floor and what we believed had post tension cables. It was a complex project, in my opinion, and one I waited on the right contractor to help me with. John was meticulous in the planning of the work, review of my design, and in every aspect of the tricky construction. While I had an initial design from the cabinet vendor, John validated the measurements, size of vanity, walk-in shower, shower seat and niches, placement of the freestanding tub, canned lights and wall sconces, vents, the new pocket door and bathroom door, etc.. The floor tiles and shower tile accent were very intricate, utilizing basketweave floor tiles and a herringbone shower tile accent. They were installed perfectly. John personally laid the shower tile accent on a piece of plywood for me to see and finalize before installation. The wall and placement of the carrara marble subway tiles and chair rails were also carefully planned across the room, so that he can plan for where the cut pieces were going to be. On the 6' x 6' walk-in shower, he assisted in getting me the best neo-angle configuration, with the best 30" door placement. He also guided me in the options for best hot water availability. There is nothing I would change in these bathroom projects and John and his crew were hardworking, meticulous, conscientious about the remodel inconvenience and were always a pleasure to work with. They always showed up early or when they said they would. I would recommend John and Hagenbach Construction to anyone for any project. Contractors like him are a gem, and few and far between. It shows that he and his crew take pride in their work."
Brenda S. in November 2016
"Updating our home was a dream we have had for years. But finding a good contractor in Bay Area was so difficult, that we almost gave up. We were introduced to United C Construction by our architect(who we also love!) It was exhausting trying to find someone trustworthy and not overpriced. We had luck of working with Osmar which during the project we had clear communication, expectation of setting, professionalism and superior craftsmanship. He walked us through every step of the way, and helped problem solve tough permitting and structural issues in Berkeley!"
Shelby R. in September 2024

Kitchen Remodels, Major Renovations , ADU , Design service, roof , and 2 more
"After they redid our counter tops and island, we had them paint out cabinets and build shelves up to the ceiling. The communication was on point this time and the results speak for themselves. Would definitely recommend them to anyone for any home project."
579B05ED6C49D67A382683F5EBB77926035FDC4FE13C89D2670E2EA034DA6B6C 1. in December 2025
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Oakland Addition & Remodeling Contractors are rated 4.7 out of 5 based on 293 reviews of 293 pros.
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