Lic #1007864 · San Francisco County · Structural
Commercial & Residential Structural Framing
Load-bearing walls, additions, and seismic-smart structural framing engineered for California.
Retail flagship maintenance, high-rise improvements, and Victorian-era remodel expertise in one of the world's most demanding building environments.
JMG frames room additions, ADU shells, and open-concept structural conversions with engineered lumber, steel, and hold-down systems that satisfy the strictest Bay Area building departments.
In San Francisco and across San Francisco County, JMG delivers framing under California Contractor's License #1007864 — permitted, inspected, and personally overseen by owner Jerry Guinn. Every structural modification is permitted, engineered, and inspected — protecting both your investment and your family's safety in earthquake country.
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 framing 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.
Framing in San Francisco — FAQ
Yes — structural repairs, sistering joists, replacing undersized headers, and shear-wall corrections, engineered where required. We shore, repair, and inspect in sequence.
More services in San Francisco
Framing in other cities
Framing · San Francisco