General Contractors, Home Remodeling & Skylight Installations
Home Additions In Hercules, CA
Custom Additions Built To Fit Your Life & Style Since 1983
Add More Living Space Without Leaving The Home You Love
Is your Hercules home starting to feel a little too tight? Whether your family is growing, your lifestyle has changed, or you simply want more room to relax, Mares & Dow Construction & Skylights is ready to help. Since 1983, we’ve been a trusted name in the Bay Area for high-quality home additions, designed to look and feel like a natural extension of your existing space.
Our design-build experts focus on creating thoughtful, functional additions that enhance your home’s comfort, increase its value, and reflect your style—all while blending beautifully with Hercules’s unique neighborhood character.
Types Of Home Additions We Build In Hercules
Every home has its own story, and your addition should fit that story perfectly. We tailor each build to your needs, property, and vision.
We specialize in:
Primary Suite Additions – Enjoy your peaceful retreat with a spa-style bathroom, spacious bedroom layout, and custom walk-in closet.
Accessory Dwelling Units (ADUs) – Ideal for multigenerational living, guest housing, or rental income. We design ADUs that meet California’s and Hercules’s current building codes.
Second-Story Expansions – Add significant living space without giving up your backyard. Great for families looking to stay rooted in place.
Garage Additions & Conversions – Build a new garage or transform an existing one into a home gym, office, or income-producing unit.
Why Hercules Homeowners Choose Mares & Dow Construction & Skylights
We’ve helped homeowners across the East Bay—especially in waterfront communities and hillside neighborhoods in Hercules—reimagine their living space without moving.
Here’s what sets us apart:
Over 40 Years of Local Experience – Trusted throughout the Bay Area since 1983
Full-Service Design/Build – One expert team from planning to final inspection
Quality Work, Done Right – Streamlined timelines with exceptional results
Energy-Efficient Materials – Sustainable insulation, framing, and window options
Permit & Process Management – We take care of city approvals, inspections, and logistics
Want to see what we’ve done for homes like yours? Browse our Residential Project Portfolio to explore our recent work.
Seamless Design, Flawless Execution
From the initial design to the final walkthrough, our process is built to make your home addition experience smooth and stress-free. Whether you’re building up, out, or creating an ADU, we manage every detail—from permits and material selection to construction and quality control.
Curious about our team? Visit our About Us page to learn more about who we are and what drives our work.
Ready To Expand Your Home In Hercules?
Stop searching for a “home addition contractor near me” and connect with the team that’s been building in Hercules and across the East Bay for over four decades. Contact Mares & Dow Construction & Skylights today to schedule your free consultation and start your Hercules home addition project. Get in touch today!
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