Yum's Mechanical Co Inc
Report verdict
Licensed & active (expires 2027-12-31) · No board discipline flag found in covered sources · 27 permits on file
88/100 HomeProFax Score — public-record factors only, not a rating of workmanship. How the score works Full report
The state board is the authority. A flag is a prompt to read the board record, not a verdict. Verify license status with the issuing board before you hire. See methodology and disclaimer & corrections.
What this report checks
Score breakdown
| Factor | Points | Why |
|---|---|---|
| License status | 35/35 | Active license on file with a state board |
| Discipline & legal flags | 20/20 | No disciplinary flag on board record |
| Permit history | 20/20 | 27 permits on file |
| Reviews (BBB + HomeProFax) | 13/25 | No BBB rating on file and no approved HomeProFax reviews yet (neutral). External ratings are linked below, not stored |
A simple, transparent sum of public-record factors. How the score works. Not a rating of workmanship.
Source data as of: Report rebuilt from source files on 2026-10-19 · CSLB bond/workers' comp as of 2026-10-14 · most recent permit on file: 2025-01-21.
What we checked
| License | Checked | CA Corporation #583839 · active |
| Bond | Checked | $25,000 with AMERICAN CONTRACTORS INDEMNITY COMPANY · as of 2026-10-14 |
| Workers' comp | Checked | Workers' Compensation Insurance (OMAHA NATIONAL CASUALTY COMPANY) · as of 2026-10-14 |
| Years licensed | Checked | Licensed since 1989 |
| Business registration | Not available in CA | State business registry not loaded yet |
| Permits | Checked | 27 permits on record |
| Discipline | Checked | none on record |
| OSHA | Not checked yet | OSHA records not checked yet |
| Reviews & outside links | Not checked yet | No review lookup run yet |
| Contractor-provided | Not checked yet | Nothing provided by the contractor yet |
Public records as of their source dates. Board status is shown as reported by the board. Not a guarantee. Ask the contractor for their verified HomeProFax report.
Licenses
Licensed since 1989 (earliest original issue date on these state license records; not a business start date)
| License # | Type | Status | Issued | Expires | Source |
|---|---|---|---|---|---|
| CA 583839 | Corporation (C-4| C10| C20| C43) Workers' comp: Workers' Compensation Insurance (OMAHA NATIONAL CASUALTY COMPANY); Contractor bond: $25000 (AMERICAN CONTRACTORS INDEMNITY COMPANY) | clear | 1989-12-29 | 2027-12-31 | State board |
Bond & workers' comp
| Contractor bond | $25,000 · AMERICAN CONTRACTORS INDEMNITY COMPANY · effective 2023-01-01 |
|---|---|
| Workers' comp | Workers' Compensation Insurance · OMAHA NATIONAL CASUALTY COMPANY · effective 2026-01-01 · expires 2027-01-01 |
Source: CSLB Public Data Portal (License Master), as of 2026-10-14. Verify current bond and insurance with CSLB and the insurer before you hire.
Building permits
| Date | Permit | Type | Address | Value |
|---|---|---|---|---|
| 2025-01-21 | 202501087963 | otc alterations permit | 25 Kearny St | $222,800 |
| 2021-12-23 | 202111051934 | otc alterations permit | 701 03rd St | $14,600 |
| 2017-01-24 | 201503181204 | otc alterations permit | 728 Pacific Av | $23,800 |
| 2016-07-05 | 201606291175 | otc alterations permit | 2501 Mariposa St | $4,180 |
| 2015-01-22 | 201501226383 | otc alterations permit | 1450 Noriega St | $16,800 |
| 2013-10-22 | 201310159255 | otc alterations permit | 649 Jackson St | $16,000 |
| 2013-07-15 | 201306270679 | otc alterations permit | 2065 Oakdale Av | $30,000 |
| 2013-04-16 | 201302260943 | otc alterations permit | 1601 Lane St | $62,100 |
| 2011-03-22 | 201103162208 | otc alterations permit | 555 19th St | $100,000 |
| 2009-01-28 | 200901281009 | otc alterations permit | 943 Howard St | $40,000 |
| 2007-01-29 | 200701292832 | otc alterations permit | 4630 Geary Bl | $45,000 |
| 2006-06-08 | 200606083513 | otc alterations permit | 821 Folsom St | $20,000 |
| 2005-03-28 | 200503288501 | otc alterations permit | 229 Jefferson St | $45,000 |
| 2005-01-10 | 200412211908 | additions alterations or repairs | 34 Turk St | $11,000 |
| 2004-12-02 | 200412020556 | otc alterations permit | 239 Kearny St | $18,000 |
| 2004-08-12 | 200408121392 | otc alterations permit | 4769 Mission St | $7,500 |
| 2004-08-10 | 200408101212 | otc alterations permit | 608 Hayes St | $9,500 |
| 2004-01-22 | 200401224579 | otc alterations permit | 1199 Valencia St | $7,000 |
| 2003-12-23 | 200312232891 | otc alterations permit | 407 09th St | $45,000 |
| 2003-02-06 | 200302066902 | otc alterations permit | 615 Cortland Av | $6,000 |
| 2002-10-17 | 200210179297 | otc alterations permit | 1199 Valencia St | $3,500 |
| 2002-08-20 | 200208204415 | otc alterations permit | 183 Golden Gate Av | $8,000 |
| 2002-04-26 | 200204265110 | otc alterations permit | 725 Taraval St | $13,000 |
| 2001-09-12 | 200109128159 | otc alterations permit | 243 Kearny St | $8,500 |
| 2001-08-02 | 200108025183 | otc alterations permit | 1000 Howard St | $48,000 |
| 2000-07-12 | 200007125013 | otc alterations permit | 1830 03rd St | $2,500 |
| 1998-03-09 | 9803914 | otc alterations permit | 481 Eddy St | $6,000 |
Source: DataSF (Building Permits + Building Permits Contacts)
Source: DataSF, City and County of San Francisco (Building Permits; Building Permits Contacts).
Discipline, complaints & legal
No board discipline or complaints found in our current sources. Federal court search (CourtListener): no state-consistent possible match in our last sample run, or not yet run for this contractor.
Around the web
Search other sites — these open a search for this name and location. They are not verified matches; check the business name, address and license number on the result.
Search Google Maps ↗ Search Angi ↗ Search Yelp ↗ Search BBB ↗ Search HomeAdvisor ↗
Outside ratings are shown for context only and are not part of the HomeProFax Score. Why?
Reviews
External review checks (we link out; we do not store or score Google, Angi, Yelp or Houzz ratings):
Check Google reviews ↗ Search BBB ↗
Homeowner reviews on HomeProFax
No published homeowner reviews yet.
Leave a review
Is this your business?
Claim this profile for free to correct details, add insurance and photos, and get a verified badge.
Yum's Mechanical Co Inc · Boiler, Hot Water Heating and Steam Fitting Contractor
San Francisco, CA
License on file: CA ••••3839
Sources for this report
- CA license board
- DataSF (Building Permits + Building Permits Contacts)
See something wrong? Request a correction. This report is compiled from public records and is not a consumer report.
Trades on this license record
HVAC Contractors Electricians Sheet Metal Contractors
From the license types matched to this business. HVAC Contractors in San Francisco · Electricians in San Francisco · Sheet Metal Contractors in San Francisco
More HVAC Contractors in San Francisco, CA
Compare 24 hvac contractors in San Francisco by license status, permits and score.
See hvac contractors in San Francisco → All contractors in San Francisco