When’s the Right Time to Remodel After Buying a House?
The right time to remodel after buying a house depends on your goals, budget, and the condition of the property. Others rush into renovation projects…
Is your Concord home starting to feel a little cramped? Whether your family is expanding, your lifestyle is shifting, or you simply want more space to relax, work, or entertain, Mares & Dow Construction & Skylights is here to help. Since 1983, we’ve been the trusted choice for residential home additions across the Bay Area—delivering seamless, stylish expansions that feel like they’ve always been part of your home.
Our expert design-build team creates custom solutions that enhance space, functionality, and long-term value, without compromising on comfort or curb appeal.
Every Concord home has its story, and every addition we build is uniquely designed to match your needs and your home’s architecture.
We specialize in:
Primary Suite Additions – Transform your bedroom into a private sanctuary with spacious layouts, spa-like bathrooms, and walk-in closets.
Accessory Dwelling Units (ADUs) – Whether for extended family, guests, or rental income, our ADUs are thoughtfully designed and fully compliant with California’s latest ADU guidelines.
Second-Story Expansions – Add square footage without losing yard space. Ideal for growing families and maximizing smaller Concord lots.
Garage Additions & Conversions – Add a brand-new garage or reimagine existing space as a home office, studio, gym, or rental-ready unit.
Homeowners throughout Concord and Central Contra Costa County turn to us for quality home additions that blend craftsmanship with efficiency. Here’s what makes us different:
40+ Years of Local Experience – Proudly serving the East Bay since 1983
Integrated Design/Build Process – One dedicated team from concept to completion
Streamlined Project Timelines – On-time delivery with exceptional attention to detail
Eco-Friendly Construction – We offer sustainable insulation, windows, and framing materials
End-to-End Project Management – We handle permits, inspections, and communication so you don’t have to
Want to see our work in action? Browse our Residential Project Portfolio to explore the quality and care behind every project.
Whether you’re adding an ADU, building a second story, or expanding your living space outward, we manage the entire process—architectural design, permitting, materials, construction, and final inspections. You can count on a smooth and stress-free experience from start to finish.
Visit our About Us page to learn more about our team, values, and commitment to craftsmanship.
Stop searching for a “home addition contractor near me” and trust the team that’s been serving Concord and the East Bay for over four decades. Contact Mares & Dow Construction & Skylights today to schedule a free consultation and get started on your Concord home addition. Get in touch today!
Contact Mares & Dow Construction & Skylights today and let our 40 years of Bay Area expertise turn your dream project into reality.
Mares & Dow Construction & Skylights is certified and accredited by the best manufacturers in the industry. From Grip-Tite Foundation Systems, to James Hardie Siding, to VELUX Skylights, you can be sure to get the highest quality products for whatever your project.
Serving the San Francisco Bay Area for over 40 years with quality general contracting, home remodeling, and skylight installation means you'll get the benefits of our expertise for every project.
Maintaining a high level of customer satisfaction, we are proud to have provided our customers throughout the San Francisco Bay Area with quality construction and home improvement services for 40 years. With half of our new clients coming to us from referrals, it’s no secret that our customers/friends are truly pleased with the work we do.
Mares & Dow Construction & Skylights, Inc. is a longstanding partnership of 40 years between Archie Mares, Dennis Dow and hundreds of great customers throughout the San Francisco Bay Area. We are a general contractor, building custom homes, additions, home remodeling, skylights, retaining wall construction and commercial remodeling.
Maintaining a high level of customer satisfaction, we are proud to have provided our customers throughout the San Francisco Bay Area with quality construction and home improvement services for 40 years. With half of our new clients coming to us from referrals, it’s no secret that our customers/friends are truly pleased with the work we do.
Quality and service come first. We approach every job, big or small, with the same care and attention to detail we’d give our own homes. Our team combines time-tested building practices with modern innovation to deliver results that stand the test of time.
Ready to start your next project? Whether you’re planning a home remodel, skylight installation, or foundation repair, our team is here to help.
Reach out to us for a free consultation. We’ll listen, offer expert guidance, and provide a detailed estimate tailored to your goals.
To enhance the lives of Bay Area homeowners through expert construction, thoughtful design, and dependable service. For over 40 years, our mission has remained simple: build with integrity, serve with pride, and create spaces our clients love to live in.
We believe in integrity, craftsmanship, and lasting relationships. Every project is built on honesty, transparency, and respect - for our clients, our partners, and the homes we’re entrusted to improve.
Mares & Dow Construction & Skylights installed a large Velux skylight for me in August 2017. The entire experience was wonderful and the skylight is beautiful, both functionally and aesthetically. Janet made sure the work was scheduled to be completed before a trip I had planned. Jimmy measured carefully when he quoted the work and even accommodated a last minute change on the location when he arrived to do the work. They protected my new floors and were careful to keep dust to a minimum. Archie came by to ensure that all was going smoothly. Freddy helped matched the stain on my nearly 70 year old tongue and grove ceiling that really took some effort and he even matched some a few small spots that a previous contractor had sanded and removed the original stain. EVERYONE was cheerful and knowledgeable. Now, my little mid century house has emerged into the light!
Mares & Dow Construction & Skylights replaced two aging skylights in our bedroom and installed automatic blinds on four skylights. This was not an easy job, since our bedroom has very very high cathedral ceilings. In fact, one other skylight installer refused to do the job altogether, and a second made a bid that was almost twice as expensive as Mares & Dow Construction & Skylights. Janet Mares, who was our main contact for the job, was a pleasure to work with. Her son, Jimmy, who led the installation, was fearless climbing the ceiling, and he eally knew his stuff. We’re thrilled with our new and improved skylights, and we appreciate Mares & Dow Construction & Skylights’ solid, reasonably priced, work. Thanks guys!
I’ve had Mares & Dow Construction & Skylights install 3 sun tunnels in my home and most recently, 2 skylights in my garage/art studio. I couldn’t be more satisfied with the quality of their work and professionalism! All my communications with their office and installers have been extremely pleasant. I would use them again (and again) and highly recommend them to anyone looking to install Velux skylights/sun tunnels in their home!
Being a new homeowner, i really did my research before having someone come out and give me a quote on a skylight. You never know what to believe when you read yelp reviews. So, i went ahead and had Jimmy from mares and dow come out and give me an estimate. He was right on time, came out and measured and was very professional while he was here. Janet called me a few days later and sent me over an estimate. I went them them and couldn’t be happier. It arrived in the time frame she had told me, and they were out that week. The workers came out on time, and were very friendly and professional. Dennis ( one of the owners) came out as well and checked on the job. The went above and beyond with their work. The skylight looks beautiful! Night and day from the old one. If you are wanting a skylight, i strongly reccomend going with mare and dow
We had Mares & Dow Construction & Skylights install a Velux skylight in our new master bathroom. The space was small and dark, so Mares & Dow Construction & Skylights suggested a big skylight to add in lots of natural light. They built in a double crown molding to beautifully frame the skylight, and now the space is open and airy with wonderful natural light. We can open the skylight during warm months to let in fresh air. It was a superb addition to our bathroom renovation and a great suggestion from Mares & Dow Construction & Skylights. They did a fantastic job and were great to work with! Thanks guys!
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Planning a home addition in Concord comes with important questions about design, permits, timelines, and construction. Below are answers to common questions homeowners ask when expanding their living space with Mares & Dow Construction & Skylights.
Mares & Dow designs and builds a wide range of custom home additions, including bedroom and bathroom expansions, primary suite additions, family room extensions, garage conversions, ADUs, and second-story additions tailored to your home and lot.
Yes. Mares & Dow uses a design-build approach, meaning design, planning, permitting, and construction are handled by one integrated team. This streamlines communication, reduces delays, and helps keep the project on track.
Absolutely. Each home addition is custom-designed to blend seamlessly with your existing architecture, rooflines, finishes, and layout so the new space feels like it has always been part of the home.
Yes. The team manages all required permits, zoning requirements, and inspections with the City of Concord and Contra Costa County to ensure your home addition meets local building codes.
Project timelines vary depending on size and complexity. Smaller additions may take a few months, while larger or multi-story additions take longer. You’ll receive a clear project timeline and regular updates throughout construction.
Yes. ADUs and garage conversions are popular options in Concord. Mares & Dow helps homeowners navigate local zoning regulations, setback requirements, and size limits to create compliant, functional spaces.
Mares & Dow focuses on high-quality craftsmanship, durable materials, and energy-efficient construction methods to enhance comfort, performance, and long-term value.
Getting started is easy. Schedule a consultation to discuss your goals, explore design options, and receive professional guidance on planning, budgeting, and next steps.