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Addition & Remodeling Contractors in Castro Valley, CA

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Service Pros

    Rose Remodeling & Design Inc. Logo
    Sunnyvale, CA·

    Garage Remodels, Kitchen Remodels, Bathroom Remodels , and 1 more

    "Rose Remodeling & Design completely transformed our kitchen. We were worried about staying within budget, but Adir helped us make smart choices without compromising quality. The process was organized and transparent, and the final result blew us away. Every guest who visits compliments our kitchen. It?s exactly what we envisioned."

    5A696DCBC755A982678D20971DC70B0F41606AD78325B4D97DDCB4AA696B86BC 8. in December 2025

    BB
    San Leandro, CA·

    Remodels

    "Amazing services at reasonable prices. Shai and his team were such wonderful people and extremely helpful in every little detail imaginable. Our garden looks better now with their help putting in all the pavers. We could have not managed this small project without their help."

    Christian P G. in December 2021

    MH
    West Hills, CA·

    Concrete, Painting, Roofing , and 1 more

    "We hired McCormick Home Builders to remodel our living room, and we are beyond pleased with the result. The team was professional, worked efficiently, and Aris design ideas made a huge difference. The room feels so much brighter and more spacious. This was the best decision we made for our home, and we were already planning our next remodel with them."

    Javier Raul R. in January 2025

    Property Pros Construction, Inc. Logo
    Castro Valley, CA·

    Electrical

    "I have already recommended them to friends. Best value for price!"

    Aaron C. in December 2016

    OT Bay Builders Logo
    San Jose, CA·

    Renovations, Landscaping, Roofing , and 1 more

    "Our unfinished basement is now a cozy, functional living space! They added a guest bedroom, bathroom, and a family lounge area. The craftsmanship is outstanding, and the crew was courteous and respectful. Worth every penny."

    0E5CBC23E8120C5C874888E64425E5407A83348D4D76C220F1E58315AF8E2405 7. in April 2025

    Bayside Builders Group Logo
    Alameda, CA·

    ADDITIONS AND REMODELS

    "Amazing services at reasonable prices. Shai and his team were such wonderful people and extremely helpful in every little detail imaginable. Our garden looks better now with their help putting in all the pavers. We could have not managed this small project without their help."

    Christian P G. in December 2021

    Victory Construction Inc. Logo
    Castro Valley, CA·

    Remodel

    "Quality work , on time, clean, delivered to schedule and budget. Also willing to identify higher quality material options and alternative solutions. Did not assume we wanted the cheapest material and labor . Higher quality material costs were appropriately identified added to estimates."

    Russell J. in December 2009

    SI
    Hayward, CA·

    Handyman and much more!

    "The team was amazing! We had an old deck in our backyard and we hired Palm Construction to replace and extend it and they did a great work! The job was done in less than 2 weeks, Communication was great, they cared about the backyard and plants and we are so happy itâ s all ready just before summer. Highly recommended!!"

    yael H. in May 2024

    HP
    Monrovia, CA·

    Remodeling

    "Emil did a wonderful job of explaining all aspects of the project during the sales presentation. Anthony and his painting crew did all that was contracted and more! As the job progressed, it was evident that more trim work was necessary. Anthony listened patiently and completed the entire painting job ahead of estimated completion."

    Linda S. in November 2020

    Fixit Construction, Inc. Logo
    San Leandro, CA·

    "They were professional and completed the project on time."

    Elizabete T. in September 2016

    UC
    Union City, CA·

    Concrete, remodeling, Concrete Slabs , and 1 more

    "Extremely professional and did an amazing job"

    Cesar C. in May 2024

    RC

    In business since 2019

    San Diego, CA·

    Additions and Remodels

    About us: "RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!"

    Y Group Remodeling, Inc Logo
    San Ramon, CA·

    Complete kitchen remodel/ Cabinets Refinish, Complete bathroom remodel, Roofing , and 2 more

    "Very friendly and professional crew. I am amazed how they put the kitchen together in a timely manner. Highly recommended!"

    Patricia M. in January 2022

    ES

    In business since 2023

    About us: "We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!"

    Unique Home Design & Remodeling Logo
    Redwood City, CA·

    Addtions Remolding

    "We hired Unique Home Design & Remodeling few months ago and we just finished our entire home remodeling project. We researched, met and interviewed few of other remodeling companies before we decided to hire Unique Home Design & Remodeling and we couldn't be happier and more satisfied with our great decision. We love David and the ideas/solutions that he brought to the project. His design team was perfect for us and they always had a few options for us to think of before we took the right decision. We've noticed very clear that everyone on the job was skilled and professional in his own trade and specialty. They did a perfect job by keeping the house as clean as they could and they were very respectful of our space. We remodeled our entire house including the kitchen, bathrooms, living room, garage, laundry room and bedrooms!!! We are super happy with the new house that we got and the complete transformation of it. Unique Home Design & Remodeling are highly recommended and we already recommended them to few of our friends."

    William H. in June 2018

    Rose Remodeling Logo
    Concord, CA

    Bathrooms, Windows & Doors, Roofs , and 1 more

    "the salesperson explained everything fully. the entire process start to finish was explained, with samples of the products and procedure, so we understood completely what we were buying. we will be getting a 50y warrantee because we chose rose remodeling. my wife and I are very pleased with the process, from sales to tear-off to new roof. we definitely recommend."

    Craig R. in November 2023

    EA Home Builders, Inc. Logo
    Concord, CA·

    "We hired EA Home Builders to renovate our guest bathroom - and they did a great job for us. The two gentlemen they hired for our job were skilled professionals. They said it would take about a week and it did these guys showed up on time every morning and worked all day (with a half hour break for lunch). And at the end of each day, they meticulously cleaned up the inevitable mess of the day. Without a doubt I would use EA Home Builders again for our next project."

    BDA79407F1087C1F6D4DFF088590085F670B683F1FEF9046862B9EEFCD70C047 7. in February 2025

    DC
    Pittsburg, CA·

    Kitchen Renovation, Additions, Deck Builds , and 8 more

    "Finally got our old office converted into a guest bath. We're expecting some family to move in with us for the summer, and we definitely needed the extra bath. The conversion was surprisingly quick, which was just what we wanted. In the span of a month, they were able to relocate the plumbing and electrical, then build a whole new bathroom that matched our master bathroom too! The tile work is very clean, the space was utilized well, and the professionalism DynamicZ carried themselves with was impeccable!"

    F174423444907A20B05145600DD8B960B743C75023548870468DD2075F4DD16A B. in May 2025

    J J Construction & Remodeling, Inc. Logo

    "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

Showing 1-19 of 19 results

Frequently asked questions

  • It’s important that you verify their license is still in good standing. Also keep in mind that certain states or provinces don’t require licensing if the job is under a certain dollar amount.
  • You can find a list of your state’s licensing requirements on the HomeAdvisor website. Before you get to work with the pro, make sure their qualifications are current and acceptable to you.
  • It is always a good idea to get a copy of the pro’s insurance certificate for future records, and in case anything happens. This is a good way to feel more secure in your home project, and to weed out potential scammers.

HomeAdvisor makes it easy to connect with pros near you. You can read reviews, get quotes and book appointments all in one place.

Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.

You can use HomeAdvisor to help evaluate a contractor’s qualifications. We put pros through a screening process, and award badges to high-performing contractors. You can find these badges on a pro’s HomeAdvisor profile, and sometimes, his or her website. 

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:

  • Have you completed a job like this before?
  • Do you have a list of references I can contact?
  • When are you able to start the job?

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. 

  • How many years of experience do you have?
  • What’s your permanent business address?
  • Are you licensed to work in my area?
  • When did you earn your business license?
  • How do you handle warranty service complaints?
  • Do you have worker’s compensation, property damage and personal liability insurance?

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.  

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HomeAdvisor Community Rating

Overall Rating:

Castro Valley Addition & Remodeling Contractors are rated 4.8 out of 5 based on 560 reviews of 560 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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Recent Job Requests for Addition & Remodeling Contractors in Castro Valley, CA

  • Project Location: Castro Valley, CA
    Date: 02/04/24
    Are you considering changing the floorplan of your kitchen?: Yes
    Which of the following will you need moved or installed in your kitchen?: Cabinets
    Which of the following will you need moved or installed in your kitchen?: Sinks
    Which of the following will you need moved or installed in your kitchen?: Appliances
    Which of the following will you need moved or installed in your kitchen?: Electrical
    Which of the following will you need moved or installed in your kitchen?: Countertops
    Which of the following will you need moved or installed in your kitchen?: Flooring
    Comment: Remodel Kitchen, remodel bathroom, convert laundry room to bathroom, convert portion of house to separate living space (ADU)
  • Project Location: Castro Valley, CA
    Date: 01/31/24
    Type of Addition: Ground level addition
    Project Description: Design and build
    What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
    What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
    What types of rooms/spaces are you interested in adding to your home?: Other
    Comment: Want to buy a Single home property with 2bed and 1 bath. I want know if I want to add a double garage and a master bedroom on top of it with walk-in closet. how much will it cost.
  • Project Location: Castro Valley, CA
    Date: 01/22/24
    Covered by Insurance: Yes
    Are you considering changing the floorplan of your bathroom?: No
    Which of the following will you need moved or installed in your bathroom remodel? (Check all that apply): Toilet
    Which of the following will you need moved or installed in your bathroom remodel? (Check all that apply): Flooring
    Which of the following will you need moved or installed in your bathroom remodel? (Check all that apply): Cabinets/vanity
    Comment: Need to fix a leak in the bathroom
  • Project Location: Castro Valley, CA
    Date: 01/21/24
    Type of Addition: Convert or finish existing space
    Project Description: Design and build
    What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
    What types of rooms/spaces are you interested in adding to your home?: Living/family room
    Comment: I’m looking to convert my attic into a den or study area with a half bathroom.
  • Project Location: Castro Valley, CA
    Date: 01/19/24
    Are you considering changing the floorplan of your kitchen?: Yes
    Which of the following will you need moved or installed in your kitchen?: Cabinets
    Which of the following will you need moved or installed in your kitchen?: Sinks
    Which of the following will you need moved or installed in your kitchen?: Appliances
    Which of the following will you need moved or installed in your kitchen?: Electrical
    Which of the following will you need moved or installed in your kitchen?: Countertops
    Which of the following will you need moved or installed in your kitchen?: Flooring
    Comment: Planning to remove wall between kitchen and dining/living room, add an island and replace cabinets and lighting.
  • Project Location: Castro Valley, CA
    Date: 01/16/24
    Scope of Remodel: Completely remodel garage
    Which of the following will you need moved or installed in your garage remodel? (Check all that apply): Electrical
    Which of the following will you need moved or installed in your garage remodel? (Check all that apply): Insulation
    Which of the following will you need moved or installed in your garage remodel? (Check all that apply): Interior walls or drywall
    Which of the following will you need moved or installed in your garage remodel? (Check all that apply): Storage cabinets/shelving
    Which of the following will you need moved or installed in your garage remodel? (Check all that apply): Flooring
    Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
  • Project Location: Castro Valley, CA
    Date: 01/12/24
    What best describes this project?: Other
    What types of work will be included in this project? (Check all that apply): Other
    Comment: I need help installing window coverings
  • Project Location: Castro Valley, CA
    Date: 01/08/24
    Type of Addition: Ground level addition
    Project Description: Build - use existing architectural drawings
    What types of rooms/spaces are you interested in adding to your home?: Bathroom(s)
    Comment: Adding a bathroom in the master bedroom
  • Project Location: Castro Valley, CA
    Date: 01/08/24
    Covered by Insurance: No
    Are you considering changing the floorplan of your bathroom?: No
    Which of the following will you need moved or installed in your bathroom remodel? (Check all that apply): Shower/bath
    Which of the following will you need moved or installed in your bathroom remodel? (Check all that apply): Flooring
    Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
  • Project Location: Castro Valley, CA
    Date: 01/08/24
    Desired Completion Date: Timing is flexible
    Request Stage: Ready to Hire
    Location: Home/Residence
  • Project Location: Castro Valley, CA
    Date: 01/07/24
    Location: Home/Residence
    Request Stage: Planning & Budgeting
    Are you planning to remodel a master bedroom?: No
    Desired Completion Date: More than 2 months
    Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.

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