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Addition Contractors

Room Addition & Home Extension in South San Jose, CA

Expand Your Home Efficiently & Safely. Get Expert Design and Construction. Increase Your Living Space Without the Hassle

  • Custom Designs Tailored to Your Needs
  • Licensed Contractors & Permit Assistance
  • High-Quality Materials & Craftsmanship
  • Energy-Efficient Additions
  • On-Time Completion & Budget Control
  • Outstanding 5-Star Reviews!
  • Custom Designs
  • Licensed Contractors
  • High-Quality Materials
  • Energy-Efficient
  • On-Time Completion
  • Outstanding 5-Star Reviews!

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Why Call Done Right Builders & Remodeling?

Room Addition & Home Renovation in South San Jose, CA

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Increase Home Value

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Custom Designs

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Energy-Efficient Additions

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Licensed & Insured

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Permit Assistance

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Quality Craftsmanship

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Expert Room Addition Design, Construction & Renovation Schedule Your Free Consultation Today!

Types of Room Additions in South San Jose, CA

While a room addition can increase your home value significantly, it can also provide more space for new family members or extra room for your kitchen, living room & work-from-home office.

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Bump Out Addition

Scaled-down version of a room addition. Adding space to the existing kitchen, nursery close to the bedroom, etc...

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Sunroom Addition

Natural light-coveted indoors as an addition of your home. Great for every season, can function as an additional living area

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Garage Conversion

Add to your garage flooring, ceiling, solid walls and you got youself an extra room as the roof and foundation are already there.

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Second Story Addition

Very popular addition. Can alsmost double your resale value and provides a considerable amount of extra sqft.

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Room On Top of Garage

A very cost-effective way of adding an extra room to your existing house as the foundation is already there.

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Kitchen Add/Extension

Having a spacious kitchen has a ton of benefits, even if you don't cook very often. It looks good and increase your home's value

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Bathroom Add/Extension

Expand your existing bathroom or create a whole new one with a bath addition or extension. Some even add a walk-in closet at the same time

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Laundry Room

If your laundry room is small or non-existent, you can get a new one! Very popular and very useful addition to have.

Hear it From Property Owners Just Like You

Done Right Builders & Remodeling has been transforming homes with expert room additions and renovations. Our dedicated team ensures every project is completed with precision and care

Our experience with Done Right builders and remodeling for on our 500 sq ft ADU project mountain view was absolutely amazing! They were professional every step of the way. The design and planning felt like a true team effort, they took our ideas, added in their expertise and our dream ADU was coming to life. We were really impressed with how they breezed through the whole permit process. No stress, no drama. When it came to construction, the team brought their A-game. Jose and the entire team were efficient, organized, and they treated the home with respect. The final result is beyond what we imagined. great craftsmanship and a design that seamlessly blends with our property. They managed to make the extra space both functional and stylish. The communication was great, keeping us updated every week with quick replies, always letting us know what's up in a text group - you could feel they cared about making us happy. Done Right took our ADU dreams and just ran with them, making them even cooler than we imagined. If you're on the lookout for a for a contractor that is serious, they are your answer. We're happy about how everything turned out. Big cheers to Done Right builders and remodeling!

We were particularly impressed with their professionalism, dependability, timeliness, accommodation, and expertise. We think that before-after photos speak for themselves. The lower level of our home sustained water intrusion last winter. After we installed circumferential foundation drains, our next call was to Done Right Home Remodeling. In addition to water damage renovations, we also wanted to update the layout of the lower floor, remodel our bathroom, and replace previously carpeted areas with LVP. We received quotes from 3 other contractors, chose to move forward with Done Right (Liz + her team), and are 100% satisfied with our decision from start to finish.

Thank you DRHR for bringing our vision to life! Phase 1 - 2nd floor bedrooms (4) remodel - 2nd floor bathrooms (full + master) remodel We talked with the DRHR team about possibly relocating while this work was done, but ultimately the team convinced us that we could stay put (saving us money) and have their guys work room-to-room in a way that enabled our family of four to go about our daily routines without interruption-we could not have been more happy with how it went! The guys were super respectful and took great care to ensure dust and debris remained isolated in only the designated work areas. Quality of the work (including installation of new shower, tub, vanity in the bathrooms, plus recessed lighting, doors, baseboards and flooring in the bedrooms) met our expectations and the team did a great job communicating their plans week to week during the 2.5 month phase of work. Phase 2 Scope - Complete ground floor remodel + new construction / kitchen addition Our home was built in 1980 and its interior layout had not been changed much at all in 40+ years. At first, we were only thinking about replacing a rec room on the back of the house with new, properly insulated construction and then updating our existing kitchen space with new cabinets/appliances/flooring. DRHR asked us, "why not move the kitchen to the new construction on the back of the house?" Once we knew that was an option, we started thinking big. Load-bearing walls were removed, beams were installed and we ended up with a beautifully sky-lit kitchen complete with a new island and sliding door walk-out to our back patio. This phase of work required plumbing and electrical work, cabinet and countertop installation, interior and exterior painting + stucco and the DRHR crew matched its high level of execution from the first phase of work.

Our experience with them has been nothing short of amazing, and we couldn't be happier with our newly remodeled kitchen. Thank you, Michael, for turning our vision into a reality! Recently had Michael from Done Right Remodeling and Design on a kitchen remodeling project on our house in Palo Alto, and I couldn't be happier with the results! From start to finish, the entire experience was outstanding. First and foremost, Michael's professionalism and expertise were noticeable from our very first consultation. He took the time to listen to our ideas and vision for the space, offering valuable insights and suggestions based on his extensive knowledge of design trends and practical remodeling solutions. His attention to detail and commitment to delivering high-quality work was apparent throughout the entire process. The project was completed on time and within the budget, which was a pleasant surprise given the scope of the renovation. Michael and his team were incredibly organized and efficient, ensuring that every aspect of the remodel was executed seamlessly. Their dedication to meeting deadlines and maintaining open lines of communication made the entire process stress-free for us. The craftsmanship of Done Right Remodeling is truly exceptional. The attention to detail in every aspect of the kitchen, from the cabinetry to the countertops and fixtures, is impeccable. The end result is a space that not only meets our functional needs but also exceeds our aesthetic expectations. Our kitchen is now a beautiful and functional centerpiece of our home. In addition to their technical skills, Michael and his team demonstrated a high level of respect for our home and family. They took great care to minimize disruption to our daily lives during the remodeling process, and they left our home clean and tidy at the end of each day. Overall, I wholeheartedly recommend Michael and Done Right Remodeling and Design for any home remodeling project. Their professionalism, expertise, and commitment to delivering exceptional results are truly unparalleled.

they did a great job and we would recommend them (particularly Miguel)! We engaged Done Right to do a multitude of renovation work (replace roof and gutters, exterior paint, replace flooring with LVP, replace baseboards, re-do fireplace, patch and repaint ceiling after popcorn ceiling removal, install recessed lighting throughout, rewire electrical up to code, install blinds). Dan and Eliad were the project managers and Miguel was the foreman. Generally, the Done Right team did a good job and the pricing was fair. Dan and Eliad were very responsive throughout the entire process which we appreciated. Miguel and team did all the work, and although not perfect, they did try to address issues (if any) that we found as we came by to check-in on the progress or during the final walkthrough. The project finished timely in 4 weeks which was in-line with the original estimate provided by Dan & Eliad. We also deferred some aesthetic choices to Miguel (e.g. recessed lighting location, direction of flooring) and he definitely made the right choices. Aside from some minor imperfections (paint splatter, some dings and dents, gaps etc.)

I would highly recommend asking for Eliad for any remodeling needs. Eliad was the project manager for my bathroom remodeling project. He was always available, very responsive and communicative. I could depend on him to help resolve any issues that we ran into. I appreciate his patience and time.

They even got it done under the estimated time frame! Ray, Avi, Joan and the rest of the team were wonderful to work with and we would highly recommend them. We were looking to do some big changes to our kitchen & dining room as well as remodel a bedroom and bath for my MIL. Set up appts with various companies and from the beginning, we knew Ray with Done Right was the right fit. He listened to our ideas and made some suggestions which we hadn't even considered. Once underway, the whole team were very professional and courteous. They started promptly every morning and ended with enough time to clean up every day. We worked from home and if they ever needed to turn off the water or electricity, they let us know ahead of time so we were prepared. Any issues, questions or changes were always addressed quickly and without any resistance. Inspections were pre-booked so they didn't create delays in the work timeline.

We highly recommend the team at Done Right Home Remodeling for your next project! Avi, Michael & Luis were a great team to work with on our shear & strong wall installation project. We searched over 30 contractors to find the right team that could take care of the installation, work around our hours to minimize disruptions to our in home business, work with the city of San Jose to arrange and pass every inspection without repeat inspections and provide an affordable price as compared to many other contractors that did not even consider a visit to our property to bid on the project. The project was completed within 2.5 months (primarily delayed due to the city of San Jose inspection schedules) and their workmanship quality was very good. The staff was courteous and flexible to work with and open to accommodate minor requests to ensure the finishing work matched our existing design.

LAST CHANCE 100% OFF In-House Consultation Want to get strated but not sure where to begin? Take advantage of our limited-time offer for a free in-house consultation. Our experts will assess your needs and provide personalized recommendations to kickstart your room addition project.
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When working with Done Right Builders & Remodeling you will never need to compromise on quality. We know your home is your biggest investment so we ensure you get the best service, the best quality and most of all the best value for your money.

Our team prides itself on our attention to detail, innovative mindset and quality workmanship. We treat your home as if it were our own. Our entire crew is made up of trustworthy and highly-skilled craftsmen licensed in all trades. Expect polite interactions and courteous professionals throughout your service.

Done Right Builders & Remodeling prides itself on customer service. We work closely with our clients to ensure 100% satisfaction. We guarantee our work with our limited lifetime guarantee. If something goes wrong we’ll come right over and fix it. Period. We are so confident in our workmanship and that is why we are able to offer our customers this Guarantee.

Questions? Answers!

Our skilled room addition contractors are ready to answer all your home expansion questions. Get in touch with us today to speak with a live expert

The timeline depends on the size and complexity of the addition. A simple room might take 4-6 weeks, while larger projects can take several months. At Done Right Builders & Remodeling, we provide detailed schedules during planning and keep you updated throughout the process to ensure everything stays on track.

Yes, most room additions require building permits to ensure compliance with local building codes. Our team at '.Done Right Builders & Remodeling.' handles all permit applications, inspections, and paperwork to avoid delays and ensure your project meets all regulations smoothly.

Costs vary based on size, materials, and location. A basic addition might start at $50,000-$75,000, while more complex projects can exceed $150,000. We provide free, detailed estimates tailored to your specific needs and budget, with transparent pricing and no hidden fees.

Common issues include structural problems, water leaks, code violations, and cost overruns. Hiring licensed professionals like our team at '.Done Right Builders & Remodeling.' minimizes these risks through proper planning, quality materials, and expert craftsmanship.

Yes, in most cases. We take measures to minimize disruption, such as containing dust and noise. For larger projects, temporary relocation of some activities might be necessary, but we work around your schedule to make it as convenient as possible.

Look for licensed, insured contractors with good reviews, references, and a portfolio of similar projects. At Done Right Builders & Remodeling, we offer free consultations, provide transparent pricing, and have years of experience in room additions to guide you through the process.

We use high-quality, durable materials that match your home's style and meet building codes. Options include wood framing, brick or siding exteriors, energy-efficient windows, and modern insulation, all chosen for longevity and performance to ensure your addition lasts.

A well-designed addition can significantly increase your home's value, often recouping 60-80% of the cost upon resale. Factors like size, quality, and how it complements your home affect the return on investment—our designs are crafted to maximize this potential.

We incorporate energy-efficient insulation, windows, and HVAC systems to keep your new space comfortable and reduce utility bills. This includes proper sealing, high-R-value insulation, and energy-efficient appliances where applicable, helping you save money long-term.

We understand plans can evolve. We discuss changes upfront and provide options for modifications, though significant changes may affect timeline and cost. Our goal is your satisfaction, so we're flexible and communicative throughout.

Don't see your question listed above? Call us now, we are available 24/7

Call us now for immediate response & assistance (650) 370-0622

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The Hidden Dangers Of A Poorly Built Room Addition

DIY or subpar room additions can lead to costly mistakes, safety hazards, and legal issues. Here are the biggest risks of not hiring professionals

Structural Failures

Improper construction can cause walls to crack, floors to sag, or roofs to collapse, endangering your family

Code Violations

Without proper permits and inspections, your addition may not meet building codes, leading to fines or inability to sell

Water Damage

Poor roofing or flashing can allow leaks, causing mold, rot, and expensive repairs

Cost Overruns

Amateur work often requires costly fixes, turning a budget project into a financial burden

Energy Inefficiency

Inadequate insulation leads to higher utility bills and discomfort

Pest Infestations

Gaps and poor sealing attract insects and rodents into your home

Mold Growth

Moisture from leaks creates dangerous black mold, affecting health

Decreased Home Value

A shoddy addition lowers property value and deters potential buyers

Health Issues

Poor ventilation and materials can cause allergies, asthma, and other respiratory problems

Structural Failures

Improper construction can cause walls to crack, floors to sag, or roofs to collapse, endangering your family

Code Violations

Without proper permits and inspections, your addition may not meet building codes, leading to fines or inability to sell

Water Damage

Poor roofing or flashing can allow leaks, causing mold, rot, and expensive repairs

Cost Overruns

Amateur work often requires costly fixes, turning a budget project into a financial burden

Energy Inefficiency

Inadequate insulation leads to higher utility bills and discomfort

Pest Infestations

Gaps and poor sealing attract insects and rodents into your home

Mold Growth

Moisture from leaks creates dangerous black mold, affecting health

Decreased Home Value

A shoddy addition lowers property value and deters potential buyers

Health Issues

Poor ventilation and materials can cause allergies, asthma, and other respiratory problems

Top-Rated Room Addition Contractors Near You. Call Now, We'll Start Planning!

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Projects Completed

Why Choose Our Room Addition Team

We expand homes with precision, quality, and care—adding space without the stress.

  • We offer transparent pricing with no hidden fees.
  • 5-Star reviews & Many satisfied clients near you
  • Free initial consultation and detailed project plan
  • Licensed, insured team with 15+ years of experience

Reliable Room Addition Services by Done Right Builders & Remodeling – Call (650) 370-0622 Today!

When it comes to room additions in South San Jose, CA, Done Right Builders & Remodeling is the contractor homeowners trust. With over 15 years of experience, our licensed professionals provide expert design, construction, and renovation services to expand your living space. We understand the importance of a well-planned addition for your family’s comfort and home value, which is why we deliver exceptional service at competitive prices.


Our comprehensive room addition services include custom design consultations, permit handling, structural work, and full construction. We use the latest techniques and high-quality materials to ensure your addition is safe, efficient, and beautiful. At Done Right Builders & Remodeling, we pride ourselves on our commitment to customer satisfaction, offering transparent pricing and flexible scheduling to accommodate your needs. Don’t settle for less – contact Done Right Builders & Remodeling today at (650) 370-0622 to schedule your free consultation and experience the difference of working with true professionals.

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