M-23 Mechanical System

Contractor license: 1083192; State license record
Based in: Danville
On San Francisco permits: Apr 2026 to Apr 2026
Last 24 months: 2 permits filed

2 permits since 2000: 2 in progress.

CompletedIn progressNever finaledExpired or cancelled

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

Median days to final inspection, citywideMedian days to permit issued, citywide

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

All

Filed	Outcome	Address	Work described on the permit	Declared cost
Apr 9, 2026	In progress issued Apr 2026	235 Pine St	safe off controls vavs and ddc controls. reconfigure duct work to match new partition plan. furnish and install galvanized steel duct distribution. furnish and install grilles, registers, diffusers. carry controls subcontractor to provide, install, and commision ddc controls. air balance. provide Details Permit 202604099170 Status issued Filed Apr 9, 2026 Permit issued Apr 24, 2026 Declared cost $231,650 Address 235 Pine St safe off controls vavs and ddc controls. reconfigure duct work to match new partition plan. furnish and install galvanized steel duct distribution. furnish and install grilles, registers, diffusers. carry controls subcontractor to provide, install, and commision ddc controls. air balance. provide Open the permit page	$231,650
Apr 9, 2026	In progress issued May 2026	465 California St	ste 700: demo (e) duct work as required. furnish and install vrf split systems, furnish and install: new ductwork, refrigerant piping, condensate drain, grilles, registers, diffusers. air balance. Details Permit 202604099158 Status issued Filed Apr 9, 2026 Permit issued May 22, 2026 Declared cost $339,500 Address 465 California St ste 700: demo (e) duct work as required. furnish and install vrf split systems, furnish and install: new ductwork, refrigerant piping, condensate drain, grilles, registers, diffusers. air balance. Open the permit page	$339,500