East Bay · Contra Costa County · Commercial Retail Hub
General Contractor
The East Bay's retail capital — Broadway Plaza-caliber tenant improvements, striping, and luxury home upgrades in the surrounding hills.
JMG Construction Services — California Contractor's License #1007864 — delivers all sixteen of our in-house trades to Walnut Creek and greater Contra Costa County. From estate remodels and custom ADUs to roofing, electrical, plumbing, and commercial HVAC, every Walnut Creek 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.
Walnut Creek pairs a high-traffic downtown retail core with hillside neighborhoods in Saranap and Northgate. Retail refreshes downtown demand night work and zero downtime; hillside homes demand fire-safe materials and defensible-space detailing. JMG crews handle both on one schedule.
All services in Walnut Creek
Recent work in the Walnut Creek area
How projects run in Walnut Creek
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.
Walnut Creek 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.
Walnut Creek Projects