Specialties
D3 Studio is a Bay Area contractor specializing in deck building and repair, flooring installation, ADUs, fences, gates, railings, stairs, pergolas, privacy screens, and custom carpentry.
We build new wood and composite decks, renovate existing decks, install hardwood and engineered flooring, and create ADUs and functional spaces designed around the property and the way you live. We also build custom fences, gates, stairs, railings, pergolas, benches, planters, and modern backyard structures.
We work with redwood, cedar, Ipe, Trex and other composites, hardwood, metal, and aluminum. Our projects range from small repairs to complete backyard renovations and ADU projects.
Our approach combines construction experience with modern design. We focus on quality craftsmanship, durable materials, thoughtful details, clean job sites, and clear communication.
Serving Palo Alto, Menlo Park, Los Altos, Mountain View, Sunnyvale, Redwood City, San Jose, San Francisco, and surrounding Bay Area communities.
Planning a deck, flooring, ADU, fence, pergola, or backyard renovation? Send us photos, approximate dimensions, and a short description of your project to get started.
History
Established in 2018.
D3 Studio was founded by Kastus, a professional designer and project manager with more than 25 years of experience. His projects have been recognized in California, Florida, and across Europe for their craftsmanship and creative vision.
Blending European, Scandinavian, and Japanese design aesthetics with the modern, eclectic spirit of Silicon Valley, Kastus developed a distinctive approach that reflects both innovation and timeless form.
His portfolio spans interior and exterior design for residential and commercial spaces, art exhibits, event installations, and public spaces throughout the San Francisco Bay Area. Each project reflects his belief that design is both structure and emotion — and that even the smallest project holds artistic potential.
Meet the Business Owner: Kastus L.
I’m Kastus — designer, builder, and founder of D3 Studio. I’ve always believed that working with wood is more than a trade — it’s a conversation with a living material. I love wood: its warmth, its rhythm, the way it changes under light and oil. Over the years, I’ve also learned how to integrate it naturally with glass, metal, and stone, creating spaces that feel balanced and alive.
Every project for me is both design and craftsmanship — from the first sketch to the moment the final board catches the sun. I stay involved in the process, working in the field, shaping details, making sure everything feels honest and intentional.
At D3 Studio, we create custom decks, pergolas, and outdoor spaces across the San Francisco Bay Area — places that connect people, light, and nature. My goal is simple: to design something that feels right, looks timeless, and makes you love being home.