San Jose: Home Addition Contractors

Top Home Builders is the top choice for professional home addition contractors in San Jose & Bay Area. Our team is experienced in all kinds of home addition projects, with a commitment to using only the finest materials with quality results. Your home will undergo a complete transformation once we complete a home addition.

From garages to kitchen add-ons, our San Jose team is here to help you improve the look and functionality of your home. Our custom home additions allow you to create the space you have always wanted while adding value to your home. We work with you through the entire planning and building process to ensure that your home addition meets your every need.

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Second Story Addition Contractors

Sometimes, a home can’t be expanded horizontally and the best option is to utilize a second-story addition. Like a traditional home addition, when you add a second story to a house, you are improving space usage and improving functionality throughout your home. Two-story additions not only allow you the opportunity to create more usable space for you and your family but also create income opportunities, such as renting out your new space to help pay your mortgage in San Jose.

A Second-story addition can be built about the existing home structure, seamlessly blending into the architecture and flow of the home. You can potentially double the size of your home without having to lose any landscaping, making it a preferred choice for homeowners in urban areas.

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RELHEALING
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Thank you for making a dream come true and building the most beautiful clinic I could have dreamed of! The service, pricing, and workmanship were of the highest level. Highly recommended!!!!!!
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ARACELIE ENCISO
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Ofer was our project manager, Very happy with my house, my kitchen, my bathroom! Highly recommend them.
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Hue Bui
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Amazing service! Clean job and high quality.
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Kathleen Wallace
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We brought in Top Home Builders to do a significant roof framing repair that required a structural engineer. THB provided all the services required from initial assessment, detailed planning, permits, implementation and inspections. We could not be happier with the results. Throughout the process the crew was respectful, receptive of our needs, kept the site clean and worked quickly and accurately. Would hire them again. We highly recommend them for any task large or small.
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Valerie Clift
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I chose Top Home Builders for my kitchen remodel and I’m so happy I did. They handled everything from the kitchen design to obtaining all the permits, the demolition, electrical, plumbing, helping me decide on cabinets and countertops and all the finishing touches to building me the kitchen of my dreams. It was extremely easy to communicate with everyone on the team and they were very responsive to any questions or concerns I had. Every person involved in my project was a pleasure to work with. Very professional and friendly and invested in doing a great job. They truly did top quality work. There were no surprise costs and didn’t go over budget. I would definitely use Top Home Builders for any future projects.
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Alec
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Top Home Builders Team did a fantastic job remodeling our kitchen. The 3D renders generated before demolition began helped us to communicate exactly what we wanted to the team even before any construction began, and helped us to select cabinets, tiles, granite, ect… We also loved having one company take care of everything (demolition, flooring, cabinets, electrical, plumbing, counter tops, paint, stairway, permits, everything…). Everyone on the team was friendly, professional, did beautiful work, and cleaned up each day. I especially liked that if any issue came up that I wanted changed, adjusted, or added, they were always willing to work with me until I was satisfied, and completed my remodel on schedule. I look forward to working with the team again on future remodeling projects. Thanks THB, Alec-
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Bayron Cospin
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I had previously worked with TBH in the past for my house remodeling. Recently I had a problem with my bathroom and immediately reached out to TBH based on my previous experience with them. They quickly responded and scheduled the visit. They took immediate action and resolved my issue; my bathroom is back to brand new with their help! They are such a professional team are very reliable. Thank you TBH and Ofer.
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Efrat Ben shitrit
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Top Home Builders Inc. exceeded all expectations! From the first consultation to the final walk-through, their team was professional, attentive, and highly skilled. They helped us bring our vision to life with thoughtful design, high-quality craftsmanship, and clear communication throughout the entire build process. What really stood out was their attention to detail and commitment to doing things the right way — no shortcuts, no excuses. They were always on time, stayed within budget, and made sure every part of the project met our standards (and theirs). If you’re looking for a reliable, honest, and talented builder who genuinely cares about your home, I highly recommend Top Home Builders Inc. They made building our dream home a smooth and enjoyable experience
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Agnes Sepehri
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⭐️⭐️⭐️⭐️⭐️ 5/5 – Outstanding Driveway and Backyard Paver Installation We recently completed a full driveway and backyard renovation with pavers, and I couldn’t be more pleased with the results. From start to finish, the experience was smooth, professional, and exceeded our expectations. AJ, our project manager, was absolutely amazing. He was organized, communicative, and truly cared about the quality of the work. He kept us updated every step of the way, made sure every detail was taken care of, and always went above and beyond to make sure we were happy with the progress. The craftsmanship on the pavers is exceptional—the driveway looks elegant and durable, and the backyard has been completely transformed into a beautiful and functional space. The attention to detail, clean finishing, and overall professionalism made this a stress-free and rewarding project. Highly recommend AJ and the entire team if you’re looking for top-tier work and great customer service.

San Jose Home Addition Services

Completely change the way you use your home by adding more living space. At Top Home Builders, our room addition services cover everything from single rooms to full second-story builds. As experienced room addition contractors in San Jose, we design and build spaces that meet your goals, fit your property, and comply with local codes. Explore the types of additions we offer below.

We use our custom home additions in San Jose to create spaces that solve everyday challenges like a small dining area, few bathrooms, or a lack of home office. From planning to construction, we focus on giving you practical new living areas that improve comfort and add long-term value to your home.

A single room addition in San Jose can make a big difference for your home. Add a private office, a larger dining room, or a guest bedroom to keep up with your family’s needs. Our team makes sure the new space blends with your current structure, both in design and flow, so it feels like a natural extension of your home.

If you have an attic or upper-level space that feels too small or dark, a dormer addition can open it up. Adding dormers is an effective way to get extra square footage without a full build-out. It’s perfect for offices, bedrooms, or study areas looking to increase natural light, ceiling height, and livable space.

A great way to expand upward to get more space is with a second story addition. As experienced second story addition contractors, we handle all structural work, permits, and planning. You’ll double your home’s living space and create room for more bedrooms, bathrooms, or even a private suite upstairs.

With a San Jose kitchen addition, we can extend your current layout to add more counter space, storage, or a larger dining area. Open up your home by connecting the kitchen with living areas or build a full extension that gives you the space you’ve always wanted.

One bathroom isn’t always enough. With a bathroom addition, you can cut down on daily stress and add convenience for your family and guests. From powder rooms to full spa-style baths, we build bathrooms that fit your needs and add convenience and comfort to your daily routine.

Sometimes families find themselves needing space for in-laws sooner than expected. An in-law suite is the perfect type of home addition to create a private, comfortable living area that is connected to the main home too. It’s also an ideal option if your in-laws visit often and need a place to stay for longer periods. We design in-law suites with convenience, privacy, and accessibility in mind, giving your family the comfort of living close while still maintaining independence.

Accessory Dwelling Units (ADUs) and Junior ADUs are popular in San Jose for rental income, guest housing, or private studios. We design and build ADUs that meet city regulations while giving you a self-contained space that’s comfortable, practical, and built to last. It’s one of the best ways to add long-term value and flexibility to your property.

Why Choose Us in San Jose?

Let’s be honest the right crew makes all the difference. At Top Home Builders, we’ve been remodeling homes across San Mateo for over 15 years. We stay organized, stay honest, and make sure you’re never left guessing. Here’s why locals trust us with their homes:

Dedicated project manager

No confusion, no hand-offs. You get one project manager from day one who keeps everything on track — updates, scheduling, and making sure things move smoothly from start to finish.

Trusted Results

From full-scale makeovers to smart layout upgrades, our work doesn’t just “get done” it works better, lives better, and looks the part. We’ve earned our rep in San Mateo by doing the job right, not just fast.

In House HOME contractors

We keep it tight. No random subcontractors. Our own crew handles your project, so communication stays clean and there’s no mystery about who’s doing what.

15+ years of experience

San Mateo homes come with quirks, we’ve seen ’em all. With over 15 years in the field, we know how to work around the tight rules, odd corners, and fast-moving timelines without missing a beat.

Award-Winning Service

Our clients refer us, and the industry’s taken note. We don’t just aim to hit the mark we usually go a little past it.

Licensed & Insured with a Lifetime Warranty

We’re fully licensed, fully insured, and we stand by every job with a lifetime warranty. No small print. Just honest protection that holds up over time.

San Jose Home Addition Process

We make adding space simple. From the first visit to the final delivery, we promise your room addition in San Jose is done right! Our step-by-step process begins with:

01

Site Visit

Our team visits your property to understand your space, discuss your needs, and evaluate what’s possible. This helps us gather the details we need before moving forward.

02

Proposal

After the site visit has ended, we prepare a detailed proposal. This includes project scope, layout options, and a budget estimate so you know exactly what to expect.

03

Work Agreement

Once the proposal is approved, we prepare a clear work agreement. This outlines the project timeline, budget, and expectations, keeping everything transparent from the start.

04

Design and Plans

Next, our design team will develop drawings and layouts. This includes architectural plans, structural considerations, and engineering as needed for your home addition. It’s at this stage that you’ll see exactly how your new space will take shape.

05

Obtain Permits

We secure all necessary permits required for home additions in San Jose. This step confirms your project meets local building codes and keeps progress on track.

06

Demolition & Construction

Our construction team begins by carefully preparing the site, removing any old structures, and building your new addition with quality materials and skilled workmanship.

Build a Guest House in San Jose

If you’re a homeowner in San Jose looking to capitalize on this opportunity, building a guest house on your property can be a fantastic investment. Not only will it provide you with additional income, but it can also serve as a private retreat for friends and family, or even serve as a rental property.

Moreover, a well-designed and thoughtfully constructed guest house can enhance the value of your property, making it more attractive to potential buyers in the future.

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FAQ’s

An addition gives you more room without leaving your neighborhood. It’s usually more affordable than buying a larger house in San José and adds long-term value.

Costs vary depending on size and finishes. A small room addition may start around $60,000, while larger or second-story projects can exceed $500,000. Custom design and material choices influence the final budget.

Yes, permits are required for most home additions. Our team manages the entire permitting process with the City of San JosĂŠ to ensure your project meets all local codes and avoids unnecessary delays.

Timelines vary by project size and complexity. Most additions take several months from design through construction, with larger or multi-story builds requiring more time.

Yes. We carefully design every addition to integrate seamlessly with your home’s architecture, ensuring the finished space feels natural and cohesive.

Ready to Start Your Remodel?

Tell us about your project, and our team will help you take the next step with clarity and confidence.

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We’re Here to Listen

    Send us a message about your project, and one of our representatives will get back to you.

    Whether you are planning a kitchen, bathroom, ADU, addition, or full home remodel, we are here to answer your questions and guide you through the process.

    Call Us 669-282-0906 Write to us info@tophomebuildersinc.com Our Location 5450 Thornwood Dr. Suite E, San Jose, CA 95123
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