Sigma Construction Company
- Based in
- Millbrae
- On San Francisco permits
- Jul 2017 to Jun 2026
- Last 24 months
- 9 permits filed
32 permits since 2000: 24 completed, 2 in progress, 1 never finaled, 5 expired or cancelled.
Of the 1 never-finaled permit, 1 is 3 to 5 years old.
This is the city’s permit record, not a license check. It does not show whether the state license is active, bonded or insured. How to read these records
Permits filed each year
How long permits take
Each point is the quarter the permits were filed, for stairs across San Francisco. A median counts only permits that have finished, so the shaded recent quarters look faster than they will end up: their slow permits have not finished yet. Hover a point for the slowest 10%. Gaps mean fewer than 5 permits. A rise in the issue line is the city’s review backlog, not the contractor. Too few of this contractor’s permits have finished to plot them.
Stairs permits
4 stairs permits: 3 completed, 1 expired or cancelled. Typically 20 days from filing to permit and 9 days from permit to final inspection.
| Filed | Outcome | Address | Work described on the permit | Declared cost |
|---|---|---|---|---|
| Dec 5, 2025 | Completed final sign-off Jul 2026 | 30 Rockwood Ct | renovation of (e) 2 story residence including reconfiguration of internal stair, addition full bath @ 2nd fl; convertion of 1st fl storage area into habitable space & laundry room; new wood deck @ existing rear yardDetails
renovation of (e) 2 story residence including reconfiguration of internal stair, addition full bath @ 2nd fl; convertion of 1st fl storage area into habitable space & laundry room; new wood deck @ existing rear yard | $175,000 |
| Aug 6, 2020 | Expired or cancelled expired Sep 2026 | 173 Dalewood Wy | remodeling of a 2 story s.f.h. consisting of 3 br & 2 ba. the remodel will refurbish the up stairs 2 bathrooms and kitchen. additionally converting the single bonus room on the 1st level to a bedroom, family room, bathroom, and laundry area. windows will be expanded to meet egress needs.Details
remodeling of a 2 story s.f.h. consisting of 3 br & 2 ba. the remodel will refurbish the up stairs 2 bathrooms and kitchen. additionally converting the single bonus room on the 1st level to a bedroom, family room, bathroom, and laundry area. windows will be expanded to meet egress needs. | $100,000 |
| Dec 13, 2017 | Completed final sign-off Dec 2017 | 101 Castro St | to comply with complaint #201790011, item #2. install 6 rescue windows in bedroom, same opening - in kind. replace rear exit door at unit #107. repair rear stairs where damaged due to dry rot. less than 50%.Details
to comply with complaint #201790011, item #2. install 6 rescue windows in bedroom, same opening - in kind. replace rear exit door at unit #107. repair rear stairs where damaged due to dry rot. less than 50%. | $10,000 |
| Jul 17, 2017 | Completed final sign-off Jul 2017 | 1383 Florida St | repair lower run of (e) stairs in the rear less than 50% of stairs. replace in-kind. pt wood.Details
repair lower run of (e) stairs in the rear less than 50% of stairs. replace in-kind. pt wood. | $3,500 |