The Peninsula · San Mateo County · Ultra-Luxury Estates
General Contractor
America's most exclusive zip code. Discreet, white-glove contracting for ultra-luxury estates and legacy Peninsula properties.
JMG Construction Services — California Contractor's License #1007864 — delivers all sixteen of our in-house trades to Atherton and greater San Mateo County. From estate remodels and custom ADUs to roofing, electrical, plumbing, and commercial HVAC, every Atherton 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 San Mateo County get one contract, one schedule, and one accountable license.
Atherton builds answer to the Town's Building Department on Station Lane — and to the heritage-tree ordinance that shapes where additions, ADUs, and driveways can land on the town's one-acre estate lots. We plan around protected oaks, manage design review, and deliver the discreet, high-touch project management Lindenwood and West Atherton estates expect.
All services in Atherton
Recent work in the Atherton area
How projects run in Atherton
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.
Atherton construction — FAQ
Yes — JMG Construction Services holds California Contractor's License #1007864 and pulls permits in San Mateo County regularly. Every project is permitted, inspected, and signed off before we call it done.
Atherton Projects