19 Heron St San Francisco, CA 94103

A rare opportunity to lease an entire 6,400 square foot reinforced concrete building across two contiguous levels on a 3,200 square foot lot, available as a single, full-building offering only and will not be divided. Originally constructed in 1923, the ground floor delivers immediate operational functionality: a large roll-up door, secondary glass garage door, pedestrian entries, open workspace, storage, and two half bathrooms. The open workspace areas benefit from abundant natural light. The second floor, accessible via two interior staircases (one recently reconstructed with permits), offers a bright open loft-style floor plan with one full bath, skylights, large street-facing windows, loft storage, and direct access to the building's signature pedestrian skybridge, one of the few original skybridges remaining in San Francisco. The building is served by 200-amp, 480-volt, 3-phase, 4-wire electrical service. Well-suited for warehouse, production, distribution, repair, showroom, studio, design, light R&D, or other compatible creative-industrial uses. The property is zoned WMUG (West SoMa Mixed-Use General) with an existing SLR Industrial General use classification, providing meaningful flexibility for a broad range of qualifying industrial, creative, and research-oriented users, subject to Planning Department review. Freeway access is exceptional, with I-80, I-280, and Highway 101 all immediately convenient, an important operational advantage for production, distribution, and service-oriented tenants. 19 Heron Street sits immediately adjacent to Heron Arts and Mr. S Leather, anchoring it within one of SoMa's most recognized and active creative-industrial corridors. The authentic 1923 concrete construction, intact industrial bones, and irreplaceable architectural character make this a genuine alternative to generic flex or creative office product, for tenants who want a space that works as hard as it looks.