San Francisco's housing stock is unusual for California: a large share of dense, attached Victorians, Edwardians, and rowhouses with flat or low-slope roofs, many in historic districts where permitting can involve more than a standard building-department review. Costs here track the statewide drivers — disposal, labor, and the Title 24 cool-roof mandate — described in full in the California roof replacement cost guide; this page covers what's specific to San Francisco.
1. Average Cost to Replace a Roof in San Francisco
| Material Category | Installed Cost / Sq. Ft. | Est. Total (2,000 sf) |
|---|---|---|
| Flat / Low-Slope Built-Up or Modified Bitumen | $6.00 – $9.50 | $12,000 – $19,000 |
| Architectural / Class-A Fire-Rated Shingles | $5.75 – $8.75 | $11,500 – $17,500 |
| Standing Seam Metal Roofing | $10.50 – $18.00 | $21,000 – $36,000 |
| Clay / Concrete Tile | $12.00 – $28.00+ | $24,000 – $56,000+ |
Flat and low-slope systems (built-up roofing or modified bitumen, rather than shingles) are far more common in San Francisco than in any other California metro this guide tracks, a direct consequence of the city's rowhouse-style construction — pricing above reflects that shift.
2. Licensed C-39 Roofing Contractors in San Francisco
As of August 24, 2026, CSLB's public license-search data shows 73 active C-39 Roofing licenses based in San Francisco — the smallest count of the six metros this guide tracks, consistent with the city's smaller footprint relative to Los Angeles or San Jose. Of those, 97.3% carry current workers' compensation insurance, the highest rate of the six, and 75.3% operate as corporations, also the highest share.
Every roofing job over $500 in San Francisco legally requires a C-39 license under California Business and Professions Code §§7008, 7058 and 7059. Verify any contractor directly through CSLB's own Check a License tool before signing anything.
3. What to Check Before You Hire
- Confirm the C-39 classification, not a general B (building) license working outside its scope on a standalone reroof.
- Ask whether the property is in a designated historic district before assuming a straightforward material swap is permittable — San Francisco's Planning Department review can apply to visible roofing changes on qualifying buildings.
- Confirm the $25,000 CSLB bond and workers' compensation coverage are both current via the license lookup above.
How this page is compiled and verified: the San Francisco contractor figures above come from CSLB's public license-search export, filtered to active C-39 licenses in San Francisco specifically, current as of August 24, 2026. Statewide cost drivers (disposal, wages, Title 24) are sourced and cited on the California guide this page rolls up to.