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 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
Pleasant Hill, CA·
Additions and Remodels
About us: "Hummingbird Development is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business."
In business since 2023
San Jose, CA·
About us: "ICON Home Builders is a luxury design-build contractor operating in Silicon Valley. ICON was established by Danny Safirstein, a seasoned professional in the realm of high-level luxury home construction and remodels. With a vision to create extraordinary living spaces that exude elegance and craftsmanship, Safirstein embarked on a journey to establish a company that would redefine the standards of the industry. Safirstein, driven by his passion for architecture and design, had spent over six years managing prestigious projects in the luxury home construction and remodeling sector in the Bay Area. His expertise and attention to detail earned him a reputation for delivering impeccable results. It was this rich experience that laid the foundation for ICON Home Builders. ICON Home Builders differentiates itself from the competition by emphasizing superior quality, meticulous attention to detail, and unparalleled customer service"
Sherman Oaks, CA·
Roofing & Windows, Kitchen Remodeling, Landscape Remodeling , and 2 more
"The team at Pure Home Remodeling did a fantastic job. We have completed two renovations with Pure Home Remodeling and the second one was just recently. They converted our existing master suite to an additional bedroom with walk-in closets, painted the hallway with addition of crown molding and remodeled the patio. In the patio, they did all the hard-scape (fire pit/table and BBQ area). The paperwork from the estimate all the way to the finish of the work, was organized in details and they finished the entire work with a minor delay. Most of the delays happened because there were several issues with the materials that we purchased and they were not in stock. Most project issues that were raised during the work, were handled professionally by our project manager, his team and subcontractors which helped tremendously in solving them quickly and efficiently. We can't be happier with this entire experience with them and mainly with the way this remodeling came out, because we know personally about bad cases where work was not done professionally OR they were abandon in the middle. We are very thankful that our remodeling project went like that."
Rob G. in December 2018
WC
In business since 2009
Campbell, CA·
Remodels and Additions
About us: "is committed to excellence every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. We have been in business since 2014, and our accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of the interests of our customers and make their concerns the basis of our business"
San Jose, CA·
Garage Refinish/ Conversion, New construction, Kitchen & bathroom remodeling , and 2 more
"Eli and the team have been amazing. They took on a massive project to make our home accessible for our kid who uses a wheelchair. They built an accessible bathroom, built ramps around the house and made sure the bathroom door was able to accommodate a wheelchair. They gave a visual lift to our house by redoing our floors, modernizing the fireplace and adding recessed lighting. It is worth mentioning that they delivered with VERY high quality and ON time as promised. I highly recommend Alon design and remodeling for your house project. And they did it all while always smiling and being positive - a quality hard to find in a contractor. You won't be disappointed working with them."
Ramya R. in October 2021
ID
In business since 2020
San Francisco, CA·
HVAC, General Contracting
About us: "With years of experience in the construction industry, we are the experts you need to take care of your home or business. We handle all of your general contracting and HVAC needs with great care. We will treat your home as we would treat our own. Give IY Development & Renovation, Inc. a call today, we look forward to working with you!"
In business since 2000
San Jose, CA·
Bathroom Remodel, Kitchen Remodel, Additional Dwelling Units , and 1 more
About us: "Our start in Construction is from varied backgrounds and experiences. Yet, with every project, we bring an eye towards quality and craftsmanship. We ensure things are done correctly so that the end result is a professional appearance. We focus on projects in Santa Clara and San Mateo counties. We have done hundreds of projects that range from new Home Construction of more than 4000 square feet to entire Home Renovations. Finishing a project on time is important, but so is doing it correctly. Thus, during the entire process, we will keep you updated on the schedule, any potential delays or anything that might impact the timing of your project. When we are finished, you will love the results."
Showing 1-9 of 64 results
Costs for related projects in San Jose, CA
- Build an Addition$64,794 - $143,485
- Demo an Interior$946 - $4,364
- Install Drainage$5,000 - $5,000
- 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 700 reviews of 700 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.
