Home Addition Experts

Adding a room to a home is specialized work that requires experienced contractors who can ensure that the modifications do not compromise the integrity of your home’s foundation or walls. Home by Tom has a track record of building extraordinary structures. We have streamlined our process for efficiency and quality control.

Initial meeting and space evaluation
Strategic planning and personalized design
Structural review and load analysis
Cost planning and budget assessment
Permit acquisition and code compliance
Construction management and coordination
Interior and exterior enhancements
Final walk-through and project delivery

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Home Addition Ideas

Not sure which addition is right for your home? Our design team will collaborate with you, identifying the challenges and present to you solutions. Our specialties include:

Moving is stressful. Eliminate the hassle with a Walnut Creek second story addition that modifies your home to suit your needs.

Expanding your home with bedroom addition for improved convenience, design, and aesthetics is a great way to invest in your home and increase its property value.

We handle every aspect of your bathroom addition from start to finish, providing consistency in quality and communication.

Creating personalized kitchen design solutions for you that fall in line with your goals and vision. It’s all about your needs. Related article What is the Kitchen Remodel Cost in Bay Area 2025

Create a office space in your home that is designed for maximum productivity, comfortable, and furnished with your office essentials.

Enjoy the outdoors without being outdoors with a sunroom addition that allows you to soak up some Vitamin D and connect with nature.

Design a totally new space that can be used for any purpose, including a junior ADU, a rental property, guest housing, etc.

What You Get with Our Home Additions

Increase Space Without Moving

Moving is stressful. Eliminate the hassle with a Walnut Creek home addition that modifies your home to suit your needs.

Increased Property Value

Expanding your home for improved convenience, design, and aesthetics is a great way to invest in your home and increase its property value.

One-Stop Shop Team

We handle every aspect of your room addition from start to finish, providing consistency in quality and communication.

Custom designs

Creating personalized design solutions for you that fall in line with your goals and vision. It’s all about your needs.

Aging in Place Design Room Addition

If you have aging loved ones, your home may need to be updated to accommodate their changing needs. Home by Tom is happy to help you modify your home’s design so aging family members can live safely and independently. We can strategically design rooms so everyday tasks do not pose a safety concern.

Check Our Google Reviews

Home By Tom

5.0

Based on 43 reviews

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Elockvanez

20:32 06 Nov 25

I recently hired Home by Tom to install quartz countertops and vinyl flooring in my home, and I couldn’t be more pleased with the results. The quartz countertops look stunning and were installed flawlessly, while the vinyl flooring has completely transformed the space with a clean, modern look. Communication was clear throughout the project, and everything was completed on time. I highly recommend Home by Tom for quality workmanship and great service.

Gene Pfanenstiel

23:39 31 Jul 25

We recently hired Home by Tom to convert our outdated laundry room into a fully functional bathroom, and the results exceeded our expectations in every way. From the very first consultation, Tom and his team were attentive, professional, and genuinely invested in understanding our vision.

They walked us through the entire process, design, plumbing, electrical, and finishing with clear communication at every stage. The team offered creative solutions to space constraints and incorporated high-end fixtures and modern design elements that made the new bathroom feel both spacious and luxurious.

What really stood out was their attention to detail. Every tile was perfectly aligned, the lighting was thoughtfully placed, and they managed to keep the project on schedule and within budget. They also maintained a clean and safe worksite throughout, which we really appreciated as we continued living in the home during construction.

We wouldn’t hesitate to recommend Home by Tom to anyone looking to reimagine a space in their home. It’s rare to find a contractor who combines craftsmanship, reliability, and design insight so well

robin rojas

02:30 21 Jun 25

We hired Home by Tom to repaint the exterior of our home, and the transformation is nothing short of amazing. From the first consultation to the final touch-up, Tom and his team demonstrated professionalism, skill, and attention to detail every step of the way.

They helped us select the perfect color scheme to complement our home's style and surroundings, and the finished product looks fresh, modern, and incredibly polished. The prepped the home properly, power washing, sanding, and caulking ensuring a smooth, long-lasting finish. Every line is clean and the coverage is even. Top notch job!

Akli MOUALDI

06:18 12 Jun 25

We had our kitchen completely updated by Home by Tom, and we couldn’t be more impressed with the results. The transformation was beyond what we imagined, and the entire process was smooth from start to finish.

Bachir Abdous

04:42 03 Jun 25

I recently had my floors redone by Home by Tom. Tom and his team kept us informed every step of the way, showing up on time and staying on schedule. If you're considering new flooring or a home remodel, Home by Tom is a top-notch choice. The new l floors have completely transformed our space.

Donna Adams

05:05 28 Mar 25

Home By Tom did a fantastic job of repairing the rolling roofing. Also, repairing the front of the house that include removing all peeling, open cracks, applied primer, trim and stucco and painting. The team was very professional, efficient, clean, organized, effective, but most of all very knowledgeable and honest. Also, finished on time. I highly recommend Home By Tom. I worked greatly with Nourdine Chami, Project Manager.

Gater Ali

20:48 30 Jan 25

I hired Home by Tom to install new windows and doors. They were very professional and did a great job. The windows and doors are high quality, and they look great!

ithri kaci

19:02 27 Jan 25

We had a great experience with Home by Tom. They helped us design and build a beautiful new deck. They were very knowledgeable and helpful throughout the process. The deck is exactly what we wanted, and it has added so much value to our home. We are very happy with the results.

Abdelghani Boukeur

19:00 27 Jan 25

I hired this company for a complete kitchen remodel, and I am thrilled with the results. They were professional, efficient, and always on time. The quality of their work is excellent, and they went above and beyond to make sure I was happy with the final product. I highly recommend them.

Kelekolio Mateo

06:05 25 Jan 25

Cesar Tux

00:58 25 Jan 25

Guzel Gul

03:19 23 Jan 25

Home by Tom did an amazing job building our new patio! From start to finish, the team was professional, creative, and attentive to every detail. They helped us design a space that perfectly fits our backyard and lifestyle. The quality of the work is top-notch, and the patio looks fantastic. We couldn’t be happier with the result and highly recommend them for any home remodeling project.

IFISS Keb (Djamal)

04:22 21 Jan 25

We hired Home by Tom to remodel our kitchen and bathroom, and the results are incredible! The team listened to our ideas, offered great suggestions, and finished on time. The quality of their work is top-notch!

Mohand Haddad

23:49 22 Nov 24

I couldn't be more thrilled with the work done by Home by Tom! From the initial consultation to the final touches, they were professional, efficient, and listened to my ideas. They transformed my outdated kitchen into a modern masterpiece. The craftsmanship is top-notch, and the attention to detail exceeded my expectations. Highly recommend!

Joshua Gonzalez

16:26 15 Oct 24

It was a pleasure to work with Jacob and his team!
Exceptional build quality and work on my home. The team's professionalism and attention to detail resulted into a stunning remodel. Jacob's communication and expertise was outstanding, highly recommend! Thank you!

Our Home Additions Projects in Action

How Much Do Room Additions Cost?

The cost of a room addition in Walnut Creek is roughly $250,000 for a 500-square-foot room. To get an estimate for your addition, contact our team.

Why Choose Us

Why Homeowners Trust
Home by Tom

21+ Years of Experience

Built from a family legacy in construction.

Full-Service Remodeling

From design to permits, we handle everything.

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Fast & Transparent Process

Clear timelines and no hidden costs.

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Licensed & Insured

Peace of mind with professional guarantees.

More About Us

5-Star Rated on Google, Yelp, Houzz & More

Hundreds of glowing reviews.

More Space, Less Stress — Your Home Addition Awaits!

Whether you want to build upwards or outwards, Home by Tom is the best contractor for the job in Walnut Creek. We have over 20 years of experience in construction and know how to execute your ideas. Expect an unmatched level of expertise from us. Schedule a consultation today!

Let’s start planning your home addition

We Serve Bay Area

Walnut Creek Home Additions

Home Addition Experts

Home Addition Ideas