Top Rated Remodeling Contractors Serving Contra Costa County, CA

If you really care about choosing a quality remodeling contractor, we’re here for you. Here’s your access to the best remodeling contractors serving Contra Costa County including 94565, 94509, 94806, 94513 and 94553. These remodelers provide second-story additions and sunroom addition, and they also work on custom home remodeling, deck expansions and bathroom remodels. For 22 years we’ve conducted the most accurate ratings and deepest research of local contractors, so you’ll be confident in choosing.

  • Last Updated Mar 04, 2026
  • 80,784 people sourced companies in Contractor - Remodeling & Additions
    6,081 Verified Contractor - Remodeling & Additions Customers Surveyed
6,081
80,784
1 of 6
Gar-Cal Corporation is a trusted leader in residential construction throughout Contra Costa and Alameda Counties. With a reputation built on craftsman...
Read More

Main Services

Contractor - Remodeling & Additions
loarrowgo
Decks & Patios
loarrowgo

Additional Services

General Construction: Kitchen Remodels, Bathroom Remodels, ADUs & JADUs; Painting Division: Interior & Exterior Painting; Roofing Division: New Roof Installation, Roof Repairs & Maintenance; Garage Doors Division: New Garage Door Installation, Repairs & Maintenance; Showroom: Cabinets, Stone & Tile, Flooring

Coverage Areas

Alameda County, Contra Costa County

Residential & Commercial
Residential & Commercial
Free Estimates
Free Estimates
Appointments Available
Appointments Available
Text Responses Available
Text Responses Available
  • Quick Connect
Hours CLOSED NOW
License:
1014246
2 of 6
Cardinal Builder, Inc is a full-service residential remodeling and restoration firm that serves clients throughout the East Bay. The company’s in-hous...
Read More

Main Services

Contractor - Remodeling & Additions
loarrowgo

Additional Services

Kitchens & Bathrooms, Additions, Remodeling & Restoration, Insurance Restoration, Emergency Water Mitigation, Carpet Cleaning, Residential Only

Brands

Medallion, Elmwood, Velux, Dura Supreme Cabinetry

Coverage Areas

The East Bay

  • Quick Connect
Hours CLOSED NOW
License:
1049009
3 of 6
East Bay PC Construction, Inc. remodels kitchens and bathrooms, builds room additions, and provides various residential and commercial remodeling serv...
Read More

Main Services

Contractor - Remodeling & Additions
loarrowgo
Decks & Patios
loarrowgo
Kitchen & Bath Contractor
loarrowgo

Additional Services

Kitchen & Bathroom Remodeling, Additions, Decks & Fences, Whole House Remodels, Home Interior & Exterior Upgrades

Coverage Areas

Greater East Bay, San Francisco, Parts of Solano County

Family Owned
Family Owned
Established in 2007
Established in 2007
Residential & Commercial
Residential & Commercial
Free Estimates
Free Estimates
  • Quick Connect
Hours CLOSED NOW
License:
1074951
4 of 6
Dahme Construction remodels kitchens and bathrooms, builds room additions, and provides other general construction services for residential and commer...
Read More

Main Services

Contractor - Remodeling & Additions
loarrowgo

Additional Services

Kitchen & Bathroom Renovations, Whole Home Remodeling, Room Additions

Coverage Areas

Contra Costa County

Family Owned
Family Owned
Established in 2004
Established in 2004
Residential & Commercial
Residential & Commercial
Text Responses Available
Text Responses Available
  • Quick Connect
Hours CLOSED NOW
License:
836642
5 of 6
A Ramos Construction, Inc. provides a wide range of general construction services for residential clients in Contra Costa and Alameda Counties. In add...
Read More

Main Services

Contractor - Remodeling & Additions
loarrowgo
Water & Fire Damage Restoration
loarrowgo

Additional Services

Kitchen & Bathroom Remodeling, Home Remodeling, Room Additions, Foundation Work, Window & Door Installation, Vinyl, Tile, Slate, Ceramic & Travertine Flooring

Coverage Areas

Contra Costa County, Alameda County

Family Owned
Family Owned
Residential & Commercial
Residential & Commercial
Free Quotes & Consultations
Free Quotes & Consultations
Free Estimates
Free Estimates
  • Quick Connect
Hours CLOSED NOW
License:
875744
6 of 6
Rockridge Builders offers a wide range of design, engineering and construction services to residential, commercial and industrial clients throughout t...
Read More

Main Services

Contractor - Remodeling & Additions
loarrowgo

Additional Services

Commercial, Industrial, & Residential Design & Construction, Design & Build Services, Foundation Replacement, Remodeling, Additions, Improvements, Retaining Walls, Drainage Systems

Coverage Areas

the East Bay

Established in 1976
Established in 1976
Diamond Certified Expert Contributor
Diamond Certified Expert Contributor
Worksmanship Guaranteed
Worksmanship Guaranteed
  • Quick Connect
Hours CLOSED NOW
License:
324919
Learn how to choose a Contractor - Remodeling & Additions and more…
Diamond Certified Remodeling Contractors In Contra Costa County

Diamond Certified remodeling contractors serving Contra Costa County are rated an average of 4.8 out of 5 stars based on 894 reviews of 187 rated remodeling contractors.
Diamond Certified remodeling contractors in Contra Costa County Avg. Star Rating.

    Map of Contra Costa County, CA

    Contra Costa County was founded in 1853, and today, your 1,123,844 neighbors use remodeling contractors for sunroom addition, custom home remodeling, patio renovations, bathroom remodels, house remodeling, and more.

    Frequently Asked Questions for Contractor - Remodeling & Additions in Contra Costa, CA
    Q: What are clients of Diamond Certified remodeling contractors saying about contractors in Contra Costa County, CA?
    A: Verified Gar-Cal Corporation Customer, 1 of 43
    "I have used Gar-Cal on 5 jobs so far. After the second job they did for me, I decided that I will only hire Gar-Cal. I trust their commitment to my satisfaction. The quality of work and attention to detail is excellent. I appreciate the open collaboration with the owner, Angel Garcia. He's very flexible, asks questions about what I want and provides excellent suggestions. He is my trusted advisor. Their concern for me and my home, during the second job, one worker noticed a water leak at my main valve. He let me know immediately and I contacted Angel, the owner. Angel himself came out soon after and fixed the leak himself. He asked me how I wanted it taken care of and I told him to fix it as if it was his own. He did a great job, came at a moments notice and took care of it before it became an issue for my family. He gave me a reasonable price afterwards and asked if it was okay. I completely trust their honesty, integrity and quality" - Jeff H.
    All Survey Responses for Gar-Cal Corporation
    Verified Cardinal Builder, Inc Customer, 1 of 157
    "I would tell them you're going to get a quality product for a reasonable price. It's more expensive than a general contractor, but you're going to get the quality behind the company. That's what I wanted. I wanted a few things, one is quality, one is a fair price, and the last thing is for them to show up when they said they will and work within the time frame they give and they definitely did that. I like that one of the owners is always on the project, and you can tell they train and use their own people and not subcontractors. As a single woman that means a lot to me. They have great people relations, they showed up, and they did everything I expected." - Suzanne H.
    All Survey Responses for Cardinal Builder, Inc
    Verified East Bay PC Construction, Inc. Customer, 1 of 28
    "I always recommend them. He does a really good job for the price. His pricing is fair, and he's honest. I've never had any problems. I always recommend the guy. Anytime I need him, he responds and that's a hard thing to find in a contractor. Usually, they'll blow you off and then quote you an outrageous price, but he always responds and gives you a fair price." - Luke S.
    All Survey Responses for East Bay PC Construction, Inc.
    Verified Dahme Construction Customer, 1 of 12
    "They are knowledgeable all around. They are conscious and do good work. They go the extra mile. There is not a lot of people who take pride in their work nowadays, but him and his workers really take pride and are knowledgeable. I could call him at anytime and ask him a question. He immediately knows what needs to be done." - Dan P.
    All Survey Responses for Dahme Construction
    Verified A Ramos Construction, Inc. Customer, 1 of 41
    "I am very happy with their work. They were great. They had different people come out to look at the job and address the challenges that we had. They were all great as well. They were very professional and it actually surprised me how communicative they were. That communication was really helpful for me, because I was an hour and forty minutes away from the property for most of the process, as it is a rental house. They were excellent with keeping me informed and would let me know what was going on or if I had any questions. I had no trouble getting in touch with them. They were thorough, and when we had some questions, they were responsive. They were even easy to reach after the fact when the job was finished. They were great." - Robert L.
    All Survey Responses for A Ramos Construction, Inc.
    Verified Rockridge Builders Customer, 1 of 75
    "They did the job better than I was expecting. One thing I liked a lot is the fact that they were safe while on the job. I thought they were competent, conscientious, and informative. I felt like they really knew what they were doing and not just winging it." - Ann B.
    All Survey Responses for Rockridge Builders
    Q: What are some of the most popular brands that Diamond Certified remodeling contractors use when working with Contra Costa County residents?
    A: Diamond Certified remodeling contractors use top-quality brands like Weyerhaeuser, Stanley, CertainTeed, 3M and Simpson Strong-Tie.
    Q: What types of in-law suite additions do remodeling contractors offer?
    A: Remodeling contractors offer various types of in-law suite additions such as bedroom and bathroom additions, kitchenette installations, living room expansions, and separate entrance constructions. These suites can be designed as an attached addition to the main house, a converted garage or basement, or even a separate guesthouse or cottage on the property. They can also include accessibility features like ramps, wider doorways, and walk-in showers for elderly or disabled family members.
    Q: Can Diamond Certified remodeling contractors work with Bosch products and similar items so I can get second-story additions in Contra Costa County?
    A: Yes, Diamond Certified remodeling contractors can work with Bosch products and similar items for second-story additions in Contra Costa County.
    Q: What did people search for when they wanted to find the best quality remodeling contractors in Contra Costa County?
    A: Sunroom Addition
    Custom Home Remodeling
    Bathroom Remodels
    Second-Story Additions
    Tub To Shower Conversion