Watch Our Remodeling Projects in the Bay Area
See the quality craftsmanship of Quartz Construction & Remodeling through these project videos, showcasing completed remodeling work for Bay Area homeowners.
Ready to transform your home? Quartz Construction & Remodeling serves San Jose, Mountain View, Palo Alto, Los Altos, Los Gatos, Sunnyvale, and all Bay Area cities. Contact us today for a free estimate. License CSLB #1003436 | (650) 749-7436
Related Project Gallery
Room Addition Gallery
Quartz Construction has completed 100+ room addition projects throughout San Jose and the Bay Area. Our room additions are designed to seamlessly integrate with your existing home’s architecture while maximizing living space and natural light.
Why Add a Room to Your San Jose Home?
- Avoid the Cost of Moving — Add space without selling and repurchasing in San Jose’s competitive market
- Maximize Property Value — Room additions yield strong ROI in the Bay Area
- Custom Design — Build exactly the space you need (bedroom, office, playroom, in-law suite)
- Permitted & Code-Compliant — Quartz Construction handles all San Jose permits and inspections
Room Addition Cost in San Jose
Room additions in San Jose cost $200–$400 per square foot. A 400 sq ft bedroom addition runs $80,000–$160,000. A second-story addition costs $250–$500 per sq ft. Quartz Construction provides detailed, itemized estimates before any work begins.
Contact Quartz Construction
Ready to add space to your San Jose home? Call (650) 749-7436 or request a free estimate online. CSLB #1003436 | BBB A+ | 4.9⭐ (65+ Reviews)
Watch: Bay Area Remodeling Insights
Expert tips and real project walkthroughs to help you plan your Bay Area home improvement.
What Our Bay Area Clients Say
4.9 ★ average rating across Google, Yelp, and Houzz from 150+ Bay Area homeowners.
"Quartz Construction did an amazing job on our kitchen remodel. The team was professional, on time, and the results exceeded our expectations. Highly recommend to any Bay Area homeowner!"
— Michael T. |
"We hired them for a bathroom remodel in our San Jose home. From permitting to final walkthrough, everything was handled perfectly. The tile work is stunning. 5 stars without hesitation."
— Sarah L. |
"Just finished our ADU garage conversion. The project came in on budget and on schedule — rare in the Bay Area! The rental income already started. Could not be happier with Quartz Construction."
— David R. |
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Licensed Bay Area contractor — CSLB #1003436 — serving San Jose, Fremont, Oakland, Santa Clara, Sunnyvale and all Bay Area communities.
Call: (650) 749-7436
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Licensed General Contractor • CSLB Lic#1003436 • Serving San Jose, Santa Clara & Bay Area
