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Addition Contractors in San Jose, CA

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Service Pros

    PC

    "This was our second major project with Primework Construction and we couldnâ t be happier. It was so easy for us, Ben and his team handle everything. They took care of the architect plans, the engineering, permits, facilities for the crew, and clean up. They worked within our budget and completed the project ahead of schedule. They really go out of their way to treat us well. We highly recommend using them for any of your projects, big and small."

    William C. in October 2023

    Babylon Builders Logo
    Riverbank, CA·

    Concrete Work/ Pavers, Landscape -Design /Install/ Remodel, Outdoor kitchens, out living, xeriscape, Decks-Pergola/ Fence , and 2 more

    "I had a great experience working with Ron and Juan. We met and discussed my ideas. They demoed my old patio and slab and build a beautiful new one. There was ongoing communication throughout the process, very appreciative. I would use them again. I'd highly recommend contacting Ron and get a quote."

    Rick T L. in December 2023

    Creekside Pro Construction, Inc. Logo
    Pleasant Hill, CA·

    Hard landscaping, Home Renovations, Bathroom remodel , and 2 more

    "My house is located at the foothill and part of the handrail were collapsing due to water damage. This is not a easy to build deck cause involving the foundation. Ben came and gave me a quotation the second day and other company I contacted they were all busy and never returned to my call. The process went smoothly and Jacob always answered my text within hours. His crew Lorenzo was also very helpful and professional to explain and build the deck and the foundation. Their price is fair and their work is fantastic. Without Jacob, I know I couldnâ t handle the project myself. He gave me the idea of using durable Ipe wood on the post and pressure treated wood to build the foundation and flashing around the edge to prevent water damage to the house. The deck materials I m using is not real wood come with 50 years warranty, without using any nail except on the edge. They were patient enough to build it cause the angle of the deck were hard to calculate. I really appreciate the workmanship and so happy I finally can enjoy the deck."

    Ben S. in October 2021

    Palm Construction, Inc. Logo
    San Diego, CA·

    Decks, Roofing

    "Jacob and his crew helped me build a beautiful Trex deck. They have helped me execute this project from A to Z whithin 2 weeks time period. Great reliable contructors to work with!!!"

    Sapir A. in December 2020

    Unique Home Design & Remodeling Logo
    Redwood City, CA·

    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

    ID
    San Francisco, CA·

    Bathroom Remodel, HVAC

    "Thus company really cares about their customers and doing good work at fair prices. Adam goes the extra mile to make sure things are going well."

    Chris R. in July 2017

    DC
    San Jose, CA·

    Professional Remodeling, Home Building, Home Additions

    "Well. I don't even know where to begin. I guess I will start with pricing - most people care about that foremost. Ray is owner and GC and he isn't the cheapest but he is not the most expensive either. You will definitely find cheaper - but he's worth it. With this contractor, I was being harassed to hurry up and bring my stuff so he could finish! Can you believe it - instead of the contractor disappearing for days at a time and missing deadlines and making the job last forever, he did a complete remodel of my home in 2 months. I mean this was a complete gut job in 2 months! My uncle is a retired roofer and builder and he was on the job checking them every 2 or 3 days. He would just show up and walk around watching the guys and he said they were doing a good job. He was amazed at the number of guys on the job site - like 10 people at a time. Ray was there daily and the people he had there were knowledgeable as well. The finished product is spectacular. When people walk into my house - its "wow" this and "wow" that. My home is amazing and well made: the floors, the plaster work, the plumbing, the electricity, the A/C - good solid work. But let me tell you why he is truly one of a kind and why I will never work with another contractor: He finished the job in March 2020 and I didn't move in until August 2020. When my son took a shower, the tub was not sealed around the tile and there was a leak. I was freaking out because he was all paid up and it was 5 months later. I called, he picked up the first ring and I told him what happened and he was there the next morning! I was so relieved and grateful - he fixed the issue without hesitation. This man stands by his work - very rare! I hired a cheaper guy to do a smaller job in my house and he destroyed my home. I had to call Ray back and he graciously made time for me (he is an extremely busy man). I ended up paying for the cheaper guy and Ray - its a lesson: I should have just hired Ray. I will never make that mistake again. Your home is your biggest investment - don't compromise - hire the best - hire Full Service. You will not be sorry.."

    Sam M. in January 2024

    Done Right Home Remodeling, Inc. Logo
    Santa Clara, CA·

    Additions, Bathroom Remodel, Roofing , and 1 more

    "After pondering it for a while I realized that my house looked dingy. It was time to paint the outside. I got a phone call from Done Right Home Remodeling asking if i had any projects so i gave them this one. As it was my first experience with this company i figured it was a good starting point to see how they run their business. The guys did not disappoint. Alan handled the project magnificently from specification through completion for the things I wanted done. He completely spelled out exactly what tasks would be done and did it at a fair price; not the highest and not the lowest which is exactly the kind of company i wanted. No surprises. His team got going on it immediately that week. For me though, some flexibility on the part of the contractor is required as the job progresses simply because of discovery. When you live in a house as long as I have been here, you tend to get used to, and often overlook, blemishes and imperfections and you don't really realize how crappy it looks. Inevitably there were a few things that i did not think about when we started and very clearly the overall job would do a lot better if we added some items to the contract. No problem for Alan! He got it done with a fair price again. And even a second time his guys found something that would look a whole lot better if we did that too, and I totally agreed. Why didn't I see that? They were taking care of me to make sure the job was "done right"... Haha okay the phrase works..I can't help its their name too. In the end, the house was painted exactly in the style and colors I wanted and it pops! I could not be happier with the final results and the company that did the work. It seriously came out even better than I thought it would. No joke. So i want to commend Alan for a great job managing this crazy thing and making sure i am totally satisfied. His team, most notably Raul's guys Freddy and Douglas, really hustled to get the project done as quickly as possible with great quality and least hassle for me. Oh heck.. after all that i did miss one tiny item... my fault, but I think I can handle that one myself haha. I'll definitely come back to Done Right for more projects down the road. 5 stars guys! Elliot ."

    Elliot K. in November 2016

    HA
    GILROY, CA·

    Remodels, Additions

    "Robert was an exceptional person to work with. He gave us many ideas that we had not thought of. He included throughout the house modern innovations, which greatly increased the homes value. He explained every detail as he went. He was a perfectionist and did not cut corners anywhere. His work was outstanding. He and his crew were always on time and ready to work. Robert told us at the start when the project would be completed and is was finished right at the time he proposed. The home renovation was to sell, and the home sold the first week of it's listing. I am sure this was due to the overall impression from the fantastic renovation. It really was an exciting opportunity watching him and his crew work."

    Robert L. in June 2023

How much do addition contractors typically cost?

  • San Jose, California Average
    $104,095
  • Typical Range
    $64,794 - $143,485
  • Low End - High End
    $14,000 - $242,000

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.  

Related Projects in San Jose, CA

HomeAdvisor Community Rating

Overall Rating:

San Jose Addition & Remodeling Contractors are rated 4.9 out of 5 based on 667 reviews of 667 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 San Jose, CA

    • Project Location: San Jose, CA
      Date: 02/05/24
      Type of Addition: Detached addition
      Project Description: Build - use existing architectural drawings
      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?: Kitchen
      What types of rooms/spaces are you interested in adding to your home?: Living/family room
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: We want to build an ADU . We already have the architectural designs .
    • Project Location: San Jose, CA
      Date: 02/04/24
      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)
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
    • Project Location: San Jose, CA
      Date: 02/03/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Kitchen
      What types of rooms/spaces are you interested in adding to your home?: Living/family room
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: San Jose, CA
      Date: 02/02/24
      Reason for Cable: 1
      Type of Addition: Convert or finish existing space
      Project Description: Build - use existing architectural drawings
      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: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: San Jose, CA
      Date: 01/28/24
      Desired Completion Date: Timing is flexible
      Request Stage: Planning & Budgeting
      Project Description: Design and build
      Comment: I have a 2400 single story house l. Planning to build second story to move 3 bedrooms to upstairs
    • Project Location: San Jose, CA
      Date: 01/28/24
      Reason for Cable: 2
      Desired Completion Date: More than 2 months
      Request Stage: Planning & Budgeting
      Requires Work on Historical Structure: No
      Request for Commercial Location: No
      Project Description: Design and build
      What type of second floor addition will this be?: Full addition
      Rooms Included:: Bedroom(s)
      Rooms Included:: Bathroom
      Comment: 3 bedroom 2 bathroom house need to make it 5 bedroom to 3 bathroom
    • Project Location: San Jose, CA
      Date: 01/26/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: We have a back patio that we want to tear down and make a bedroom but still have the sliding door that leads from the house to patio be the room door so adding the three walls to make the room is idea also from inside the house once you walk out the sliding doors there's two steps would also keep those so it would still need the floor foundation but wouldn't have to be same level as the sliding door.
    • Project Location: San Jose, CA
      Date: 01/21/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Living/family room
      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: Plan 1: Expand to add one drawing room and an office room attach with it with a half bathroom. Plan2: Second floor addition - One Master bed room suit with attached full bathroom and a balcony and an office room. Plan 3: One master bed room suit in ground floor
    • Project Location: San Jose, CA
      Date: 01/21/24
      What best describes this home addition project?: Build from existing designs
      What kind of addition do you want?: Convert or finish existing space
      What room(s)/space(s) are you interested in adding to your home?: Living/family room
      What best describes this project?: Addition to home
      What room(s)/space(s) are you interested in adding to your home?: Bathroom(s)
      What room(s)/space(s) are you interested in adding to your home?: Bedroom(s)
      What room(s)/space(s) are you interested in adding to your home?: Kitchen
      Comment: Garage conversion into 1 bedroom ADU under 450 sf.
    • Project Location: San Jose, CA
      Date: 01/20/24
      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)
      Comment: Building a room in the backyard
    • Project Location: San Jose, CA
      Date: 01/20/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Kitchen
    • Project Location: San Jose, CA
      Date: 01/19/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: We are exploring as a family whether to consider moving or, to potentially build out a downstairs bedroom and upstairs addition (office/bedroom). The current floor plan is not working for us.
    • Project Location: San Jose, CA
      Date: 01/18/24
      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: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.
    • Project Location: San Jose, CA
      Date: 01/17/24
      Type of Addition: Ground level addition
      Project Description: Design and build
      What types of rooms/spaces are you interested in adding to your home?: Kitchen
      What types of rooms/spaces are you interested in adding to your home?: Living/family room
      What types of rooms/spaces are you interested in adding to your home?: Other
      Comment: Looking to remodel the kitchen, push the living room forward and fix the roof of the garage to be an A frame instead of flat.
    • Project Location: San Jose, CA
      Date: 01/16/24
      Type of Addition: Second story 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?: Living/family room
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
      Comment: Looking to add on to our home and up adding a 2nd level. Would take the home from 1233 sq ft to ~ 2100 sq ft. We would be adding more living room space on the ground floor and 2 bedrooms and 2 bathroom on the 2nd floor
    • Project Location: San Jose, CA
      Date: 01/16/24
      Type of Addition: Detached addition
      Project Description: Build - use existing architectural drawings
      What types of rooms/spaces are you interested in adding to your home?: Other
      Comment: ADU foundation
    • Project Location: San Jose, CA
      Date: 01/11/24
      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?: Kitchen
      What types of rooms/spaces are you interested in adding to your home?: Bedroom(s)
    • Project Location: San Jose, CA
      Date: 01/10/24
      Desired Completion Date: Timing is flexible
      Request Stage: Planning & Budgeting
      Requires Work on Historical Structure: No
      Request for Commercial Location: No
      Project Description: Build - Use existing architectural drawings
      Rooms Included:: Kitchen
      Rooms Included:: Bedroom(s)
      Rooms Included:: Living/Family room
      Rooms Included:: Bathroom
      What type of guest house/casita addition will this be?: Remodel existing space
      What type of guest house/casita addition will this be?: Detached addition
      Comment: Wish to convert a 530 sq ft garage into an ADU.

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