Licensed General Contractor — Lic #1007864
BUILT TO IMPRESS.CRAF
High-net-worth estate remodels, celebrity residences, and premier retail flagships — sixteen trades in-house, one accountable owner. San Jose & the Bay Area to Sacramento · San Francisco to San Diego.
The JMG Manifesto
Uncompromising Precision
From star-architect blueprints to high-footfall Starbucks commercial maintenance, every nail, wire, and weld meets exacting standard tolerances. Our work is measured in millimeters, not margins.
Commercial & Luxury Synergy
Cross-disciplinary mastery handling multi-million dollar residential estates and ADUs alongside fast-track retail turnarounds — the discipline of national-brand commercial work, applied to your home.
Full-Lifecycle Execution
Our own in-house architecture. Our own engineers. Sixteen essential construction trades — all under one roof, with direct accountability from owner Jerry Guinn on every project. One contract. One schedule. One license: #1007864.
The Trades Directory
Retail Partners & Jobs Completed
California Construction Company
JMG Construction Services is a licensed California construction company (General Contractor Lic #1007864) delivering residential, commercial, and retail construction statewide. From luxury home remodels and custom ADU construction in Silicon Valley to roofing, electrical, plumbing, and commercial HVAC, our sixteen in-house trades cover every project from foundation to finish.
As a Bay Area general contractor headquartered in San Jose, we serve fifteen of California's highest-income cities — Atherton, Hillsborough, Palo Alto, Los Altos, Saratoga, and more — through the East Bay and north to Sacramento. Our retail construction and maintenance crews run the full corridor from San Francisco to San Diego for national brands.
The Transformation Archive
Drag the gold line to compare real JMG project photography — ground-up estates, national-brand retail build-outs, and finish work, shot on our own job sites.
Service Territories
Residential and commercial construction from San Jose and the Bay Area to Sacramento — retail maintenance statewide, San Francisco to San Diego.
Private Consultation
Every engagement begins with a private consultation with owner Jerry Guinn. Share the property, the trade, and the timeline — we respond within one business day.
Jerryguinn@jmgconst.com
guinnjerry32@yahoo.com
+1 (510) 432-7439
CA Lic #1007864 · Licensed & Insured