East Bay / San Ramon Valley · Contra Costa County · Luxury Residential
General Contractor
Blackhawk-adjacent luxury — gated-community remodels, outdoor living construction, and estate grounds work.
JMG Construction Services — California Contractor's License #1007864 — delivers all sixteen of our in-house trades to Danville and greater Contra Costa County. From estate remodels and custom ADUs to roofing, electrical, plumbing, and commercial HVAC, every Danville project is personally scoped by owner Jerry Guinn and executed by our own crews — never brokered to unknown subcontractors.
Whether the brief is a celebrity-grade whole-estate renovation, a discreet retail maintenance program, or a high-value ADU addition, our clients across Contra Costa County get one contract, one schedule, and one accountable license.
Danville projects often answer to two authorities: the Town's building division and an HOA design-review board — Blackhawk most famously. We prepare HOA submittal packages, manage the town's permit process, and build the estate remodels, outdoor structures, and ADUs that define Diablo-adjacent living.
All services in Danville
Recent work in the Danville area
How projects run in Danville
Private Consultation
Walk the property with owner Jerry Guinn. Honest scope, realistic timeline, and a written line-item estimate — free.
Design & 3D Rendering
See the finished project in photorealistic 3D before a single wall comes down. Finishes get locked before demo day.
Permits, Handled
Plans, submittals, corrections, and city or county coordination under CA License #1007864. You sign — we run the process.
Build & Final Inspection
Sixteen in-house trades on one schedule, one accountable owner. Inspection passed, walkthrough done, keys in hand.
Danville construction — FAQ
Yes — JMG Construction Services holds California Contractor's License #1007864 and pulls permits in Contra Costa County regularly. Every project is permitted, inspected, and signed off before we call it done.
Danville Projects