From full-room extensions to freestanding backyard cottages, we build spaces that give you flexibility, privacy, and long-term value. Our team handles every part of the process, from permitting to final walkthrough.
Expand your home with new bedrooms, offices, living spaces, or expanded kitchens and bathrooms.
Turn unused garages into livable space, home gyms, guest suites, or rental units.
Build a fully independent unit in your backyard—great for rentals, in-laws, or guest accommodations.
Seamlessly integrate an additional unit into your existing home structure while maintaining privacy and functionality.
A collaborative, client-first approach to building your ideal space.
We begin by getting to know you—your goals, lifestyle, design preferences, and vision for your home. We’ll review your ideas, discuss budget expectations, and clarify timelines to ensure we’re aligned from the start.
Working closely with architects and interior designers, we turn your ideas into detailed, thoughtful plans. We focus on creating a space that’s not only beautiful but functional, energy-efficient, and tailored to your day-to-day life.
At RGC, we combine hands-on expertise with a commitment to precision, transparency, and client satisfaction. From Concord to San Jose and beyond, our team delivers construction solutions that stand the test of time.
From business build-outs to family home remodels, clients choose RGC for our clear communication, reliable timelines, and proven results across Concord, San Francisco, San Jose, and beyond.
We handle permitting, inspections, and every last finish with precision — ensuring your project meets all California building standards and exceeds expectations.
Schedule a call with our Concord-based team to get started on your room addition or ADU.
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