California / Builders / Quartz Construction
Licence verified, no local permit history
CSLB #1003436 · QUARTZ CONSTRUCTION · Corporation
Design-build ADU contractor based in San Jose. Builds detached ADUs and garage conversions, built on site. Says it serves 20 California cities.
No ADU permits are on file under this licence in the cities we cover. Most California cities do not publish the contractor's name on a building permit, so this usually reflects what a city discloses rather than what a builder has built. Ask them directly for recent addresses and permit numbers you can look up.
Quartz Construction & Remodeling is a San Jose design-build contractor handling kitchen and bathroom renovations, room additions, backyard ADUs, garage conversions, and outdoor living projects. The firm pulls permits as part of its general contracting work and has been operating for more than twenty years.
quartzconstructionremodeling.com
The company’s own description · licence shown on their advertising matches the state register
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ADU Standards does not issue zoning determinations and does not endorse contractors. Licence details are from the California Contractors State License Board, checked 2026-08-15. A city that pre-approves a plan has vetted the plan, not the builder. Always confirm licence standing at cslb.ca.gov before you sign anything.