Blackstone Development Inc
- Based in
- Walnut Creek
- On San Francisco permits
- Jan 2020 to Aug 2025
- Last 24 months
- 2 permits filed
5 permits since 2000: 2 completed, 2 in progress, 1 never finaled.
Of the 1 never-finaled permit, 1 is 5 to 10 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 all building permits 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.
Most recent permits
| Filed | Outcome | Address | Work described on the permit | Declared cost |
|---|---|---|---|---|
| Aug 11, 2025 | In progress issued Aug 2025 | 543 46th Av | revision 202506168748- adding interior wall in the garage to create a storage closet, new layout for living room, kitchenette, and bathroom on 1st floorDetails
revision 202506168748- adding interior wall in the garage to create a storage closet, new layout for living room, kitchenette, and bathroom on 1st floor | $12,000 |
| Jun 16, 2025 | In progress issued Jun 2025 | 543 46th Av | master bath and closet remodel. master bedroom remodel. new ductwork and new sheetrock in garage. (e) in-kind like for like.Details
master bath and closet remodel. master bedroom remodel. new ductwork and new sheetrock in garage. (e) in-kind like for like. | $218,254 |
| Oct 5, 2022 | Completed final sign-off Oct 2022 | 945 Corbett Av | remove window, repair water damage to framing, sheetrock, stucco, siding as needed. reinstall window replace lath, stucco, siding, sheetrock, paint. visible from streetDetails
remove window, repair water damage to framing, sheetrock, stucco, siding as needed. reinstall window replace lath, stucco, siding, sheetrock, paint. visible from street | $34,174 |
| Oct 5, 2022 | Completed final sign-off Dec 2022 | 925 Corbett Av | remove window repair water damage to framing, sheetrock, stucco, siding as needed. reinstall window, replace lath, stucco, siding, sheetrock, paint. one window replace in kind material and operator visible.Details
remove window repair water damage to framing, sheetrock, stucco, siding as needed. reinstall window, replace lath, stucco, siding, sheetrock, paint. one window replace in kind material and operator visible. | $24,616 |
| Jan 16, 2020 | Never finaled issued Feb 2020, no final | 3282 Jackson St | remedial repair: leveling of floors, replacement of wood flooring, replacement of windows, painting, replacement of wood trim, replacement of exterior siding, foundation substrate support, bathroom-replacement of floor and shower tile, stone countertop and bathroom fixtures.Details
remedial repair: leveling of floors, replacement of wood flooring, replacement of windows, painting, replacement of wood trim, replacement of exterior siding, foundation substrate support, bathroom-replacement of floor and shower tile, stone countertop and bathroom fixtures. | $365,000 |