Lic #1007864 · San Francisco County · Design & Planning
In-House Architect & Engineer
Architectural design and structural engineering under the same roof as construction — one team designs, permits, and builds.
Retail flagship maintenance, high-rise improvements, and Victorian-era remodel expertise in one of the world's most demanding building environments.
Most projects stall in the handoff between designer, engineer, and builder. JMG eliminates it: architectural design, structural calculations, Title 24 energy compliance, and permit-ready construction drawings are produced in-house and coordinated directly with the crews who will build them.
In San Francisco and across San Francisco County, JMG delivers architect & engineering under California Contractor's License #1007864 — permitted, inspected, and personally overseen by owner Jerry Guinn. From custom estate architecture in Atherton to engineered tenant improvements for national retail brands, every design decision is made with real construction knowledge — so what gets drawn is exactly what gets built, on budget and on schedule, under California Contractor's License #1007864.
San Francisco builds answer to DBI — and often to the Planning Department's historic-preservation review. Soft-story retrofits, Victorian and Edwardian renovations, and multi-trade tenant improvements across the city's retail corridors: JMG navigates the permits, the neighbors, and the logistics of building in a dense city.
What's included in San Francisco
Recent architect & engineering work
The process in San Francisco
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.
Architect & Engineering in San Francisco — FAQ
Not with JMG. Design, structural engineering, and permitting happen in-house — one contract and one accountable team from first sketch to final inspection, which removes the most common source of delays and change orders.
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Architect & Engineering · San Francisco