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
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Service Pros
Sunnyvale, CA·
Full Service Plumbing Company, Full Service Electric Company, Full Service Surveillance Needs , and 2 more
"The experience with Sanjeev and his team was phenomenal. Joe and Walter are his right and left hand guys. They all made sure that I fully understood the scope of the project before providing a very detailed written AND visual proposal, which my HOA appreciated. They completed the project on time and kept me in the loop as they ran into small hurdles. Overall, they're a bunch of really creative thinkers and were able to help solve issues as they ran into some complexity with the project. What was neat is that they involved me every step of the way to make sure that I was comfortable as they progressed. I would highly recommend Sanjeev and his team to help with any home remodeling project. They are truly experts in this arena."
Samuel L. in April 2021
San Jose, CA·
home flips, Residential and Commercial Remodeling, Full Home Remodeling , and 7 more
"I have hired Alvarado Construction for multiple projects around our home for many years now. Most recently, for complete kitchen and bathroom remodeling. It's always a pleasure working with Alex Alvarado because he is honest, has great ideas, is reasonable with pricing and is very passionate about his work. Alex and his team stayed in constant communication with my husband and I and also helped with the permit process, which is a big plus. The crew is respectful, attentive to detail and hard working. I recommend them for any small or major projects. They make sure to exceed your expectations!"
Jessica N. in June 2023
BC
Santa Clara, CA·
Bathroom Remodels, Kitchen Remodels, Additions , and 2 more
"Excellent communication. Execution was outstanding. Very able people worked hard and long and got the job done in a most timely manner. Detail work was first rate. When something needed to be adjusted that was done. Some of the adjustments were just amazing. (We had a built in Murphy Bed installed that did not quite fit the space. A tapered base board kept this from looking awkward. Amazing!) Also all the folks were very nice. Add reasonable pricing and there is nothing else to ask for. I liked them so much that when my daughter did a major remodel, I recommended Baja, and she too has been super happy with the results. Where I come from, passing a vendor on to family is the highest form of praise."
ted A. in October 2018
San Jose, CA·
Major Home Repairs, Additions to Existing Structure, Remodel Bathroom , and 1 more
"Future Vision Remodeling was very easy to work with. A representative came to my home to talk about a kitchen remodel. He shoved me some options and there was a pretty big choice. Everyone from Future Vision was nice, professional and very knowledgeable.From the start of the project, I worked with Roy, the project manager . He was responsible, honest and professional from the very beginning. He gave me regular updates and provided realistic timeline. He was also were very attentive to the little details and that was very important to me. The projects came in on budget and on time and I love my new kitchen. I would certainly use Future Vision again and recommend them to my friends, coworkers, and family!!!"
Troy B. in December 2018
San Jose, CA·
Kitchen - Remodel, Addition to Existing Structure - Build, Major Renovation - Multiple Rooms , and 1 more
"We had a great experience working with Robert. We had a goal of what we wanted to achieve and a budget and Robert worked with us all the way to the end to help us meet our goal. Great communication, answered all of our questions and we had A LOT. Just a very pleasant person to work with. All the contractors were respectful and professional and the quality of work was more than satisfactory. The work was well planned out and all the phases flowed together. The work was completed on schedule. We did encounter some lumber issues due to Covid but we were still able to work through it and get the project completed. We are very satisfied with our new master addition."
Matt A. in January 2022
CM
Gilroy, CA·
"The project came out fantastic and overall came out top notch, very pleased with there work and how the owner of C M Builders kept in touch throughout the entire project from start to finish. Recommend them to all, 10/10 would hire them again."
Jesse G. in June 2024
San Jose, CA·
Kitchen Remodels, Bathroom Remodels, Full Home Remodels , and 2 more
"Danny's expertise shone through from our very first meeting, where he presented an impressive initial design that immediately instilled confidence in the project's outcome. His meticulous planning and efficient execution made the process nearly effortless for me. Throughout the project, Danny demonstrated exceptional professionalism: He patiently addressed all my questions, ensuring I felt informed and comfortable with each decision. He took charge of the shopping process, offering valuable professional advice on material selections. When the initially chosen tile color didn't translate well from the store to my home, Danny proactively brought a sample for us to evaluate in situ. This attention to detail allowed us to pivot and select a more suitable option that enhanced the overall aesthetic. The final result exceeded my expectations, with Danny's design acumen particularly evident in the enlarged shower space. His thoughtful approach to space utilization has significantly improved the functionality and appeal of the room. Danny's combination of design talent, project management skills, and client-focused service resulted in a fantastic outcome that I'm thrilled with"
Yu Z. in September 2024
"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
BC
Gilroy, CA·
Construction management and project administration, Complete architectural Design and Construction services, Custom remodel and custom home construction , and 1 more
"One of the biggest benefits is the fact that they have both the home design and the building aspects of the project. The owner of the business is very creative and even after the design is completed, he still brings improvments to the design as it goes along!"
Geoff M. in August 2009
Showing 10-18 of 35 results
Costs for related projects in San Jose, CA
- Build an Addition$64,794 - $143,485
- Demo an Interior$946 - $4,364
- Perform Home Renovations and Repairs$6,556 - $15,592
- Remodel or Renovate a House$65,487 - $152,227
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 362 reviews of 362 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: 02/05/24Type of Addition: Detached additionProject Description: Build - use existing architectural drawingsWhat 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?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat 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: 02/04/24Type of Addition: Ground level additionProject Description: Build - use existing architectural drawingsWhat 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: 02/03/24Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat 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: 02/02/24Reason for Cable: 1Type of Addition: Convert or finish existing spaceProject Description: Build - use existing architectural drawingsWhat 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?: OtherComment: Customer did not provide additional comments. Please contact the customer to discuss the details of this project.Project Location: San Jose, CA Date: 01/28/24Desired Completion Date: Timing is flexibleRequest Stage: Planning & BudgetingProject Description: Design and buildComment: I have a 2400 single story house l. Planning to build second story to move 3 bedrooms to upstairsProject Location: San Jose, CA Date: 01/28/24Reason for Cable: 2Desired Completion Date: More than 2 monthsRequest Stage: Planning & BudgetingRequires Work on Historical Structure: NoRequest for Commercial Location: NoProject Description: Design and buildWhat type of second floor addition will this be?: Full additionRooms Included:: Bedroom(s)Rooms Included:: BathroomComment: 3 bedroom 2 bathroom house need to make it 5 bedroom to 3 bathroomProject Location: San Jose, CA Date: 01/26/24Type of Addition: Ground level additionProject Description: Design and buildWhat 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: 01/21/24Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat 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?: OtherComment: 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 floorProject Location: San Jose, CA Date: 01/21/24What best describes this home addition project?: Build from existing designsWhat kind of addition do you want?: Convert or finish existing spaceWhat room(s)/space(s) are you interested in adding to your home?: Living/family roomWhat best describes this project?: Addition to homeWhat 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?: KitchenComment: Garage conversion into 1 bedroom ADU under 450 sf.Project Location: San Jose, CA Date: 01/20/24Type of Addition: Ground level additionProject Description: Design and buildWhat 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 backyardProject Location: San Jose, CA Date: 01/20/24Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: KitchenProject Location: San Jose, CA Date: 01/19/24Type of Addition: Ground level additionProject Description: Design and buildWhat 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: 01/18/24Type of Addition: Ground level additionProject Description: Build - use existing architectural drawingsWhat 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: 01/17/24Type of Addition: Ground level additionProject Description: Design and buildWhat types of rooms/spaces are you interested in adding to your home?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Living/family roomWhat types of rooms/spaces are you interested in adding to your home?: OtherComment: 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: 01/16/24Type of Addition: Second story additionProject Description: Design and buildWhat 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 roomWhat 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 floorProject Location: San Jose, CA Date: 01/16/24Type of Addition: Detached additionProject Description: Build - use existing architectural drawingsWhat types of rooms/spaces are you interested in adding to your home?: OtherComment: ADU foundationProject Location: San Jose, CA Date: 01/11/24Type of Addition: Ground level additionProject Description: Design and buildWhat 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?: KitchenWhat types of rooms/spaces are you interested in adding to your home?: Bedroom(s)Project Location: San Jose, CA Date: 01/10/24Desired Completion Date: Timing is flexibleRequest Stage: Planning & BudgetingRequires Work on Historical Structure: NoRequest for Commercial Location: NoProject Description: Build - Use existing architectural drawingsRooms Included:: KitchenRooms Included:: Bedroom(s)Rooms Included:: Living/Family roomRooms Included:: BathroomWhat type of guest house/casita addition will this be?: Remodel existing spaceWhat type of guest house/casita addition will this be?: Detached additionComment: Wish to convert a 530 sq ft garage into an ADU.
