Sigma Construction Company
Report verdict
Licensed & active (expires 2027-12-31) · No board discipline flag found in covered sources · 32 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 | 32 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: 2026-06-26.
What we checked
| License | Checked | CA Sole Owner #1009864 · active |
| Bond | Checked | $25,000 with AMERICAN CONTRACTORS INDEMNITY COMPANY · as of 2026-10-14 |
| Workers' comp | Checked | Workers' Compensation Insurance (STATE COMPENSATION INSURANCE FUND) · as of 2026-10-14 |
| Years licensed | Checked | Licensed since 2015 |
| Business registration | Not available in CA | State business registry not loaded yet |
| Permits | Checked | 32 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 2015 (earliest original issue date on these state license records; not a business start date)
| License # | Type | Status | Issued | Expires | Source |
|---|---|---|---|---|---|
| CA 1009864 | Sole Owner (B) Workers' comp: Workers' Compensation Insurance (STATE COMPENSATION INSURANCE FUND); Contractor bond: $25000 (AMERICAN CONTRACTORS INDEMNITY COMPANY) | clear | 2015-12-21 | 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 · STATE COMPENSATION INSURANCE FUND · effective 2017-12-12 · expires 2026-12-12 |
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 |
|---|---|---|---|---|
| 2026-06-26 | 202606253904 | otc alterations permit | 30 Rockwood Ct | $1 |
| 2026-06-18 | 202606173419 | otc alterations permit | 101 Castro St | $50,000 |
| 2026-03-31 | 202603318550 | otc alterations permit | 20 Topaz Wy | $25,000 |
| 2026-01-15 | 202512051070 | otc alterations permit | 30 Rockwood Ct | $175,000 |
| 2025-10-21 | 202509094916 | otc alterations permit | 1350 44th Av | $80,000 |
| 2025-09-29 | 202509246059 | otc alterations permit | 30 Rockwood Ct | $1,000 |
| 2025-09-29 | 202509266253 | otc alterations permit | 30 Rockwood Ct | $25,000 |
| 2025-09-22 | 202509225815 | otc alterations permit | 30 Rockwood Ct | $12,000 |
| 2024-12-30 | 202412307526 | otc alterations permit | 531 46th Av | $2,500 |
| 2024-09-24 | 202409241501 | otc alterations permit | 1415 Waller St | $20,000 |
| 2024-08-12 | 202408128440 | additions alterations or repairs | 1350 44th Av | $80,000 |
| 2024-08-05 | 202408057966 | otc alterations permit | 101 Castro St | $100,000 |
| 2024-06-17 | 202406174652 | otc alterations permit | 804 Stanyan St | $7,000 |
| 2024-02-05 | 202402055262 | otc alterations permit | 804 Stanyan St | $1 |
| 2023-11-17 | 202311171024 | otc alterations permit | 804 Stanyan St | $75,000 |
| 2023-05-22 | 202305228269 | otc alterations permit | 273 27th Av | $10,000 |
| 2022-09-14 | 202209142434 | otc alterations permit | 1415 Waller St | $5,000 |
| 2022-09-12 | 202209122248 | otc alterations permit | 1415 Waller St | $9,000 |
| 2022-06-14 | 202203149970 | otc alterations permit | 2347 16th Av | $30,000 |
| 2021-12-03 | 202112033619 | otc alterations permit | 2002 Pacific Av | $50,000 |
| 2021-09-13 | 202109087989 | otc alterations permit | 173 Dalewood Wy | $1 |
| 2021-03-16 | 202008061273 | otc alterations permit | 173 Dalewood Wy | $100,000 |
| 2020-09-29 | 202009295439 | otc alterations permit | 4463 Mission St | $25,000 |
| 2019-12-05 | 201912058798 | otc alterations permit | 1350 44th Av | $30,000 |
| 2019-06-12 | 201906123253 | otc alterations permit | 1226 06th Av | $75,000 |
| 2019-03-11 | 201810254177 | additions alterations or repairs | 94 Elsie St | $100,000 |
| 2019-01-11 | 201901110153 | otc alterations permit | 4463 Mission St | $20,000 |
| 2018-10-15 | 201810153154 | otc alterations permit | 1431 18th Av | $21,000 |
| 2018-01-26 | 201801098224 | otc alterations permit | 2942 Divisadero St | $10,000 |
| 2017-12-13 | 201712136409 | otc alterations permit | 101 Castro St | $10,000 |
| 2017-07-27 | 201707273144 | otc alterations permit | 1226 06th Av | $28,000 |
| 2017-07-17 | 201707172084 | otc alterations permit | 1385 Florida St | $3,500 |
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.
Sigma Construction Company · General Building Contractor
Millbrae, CA
License on file: CA 10••••9864
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.
More General Contractors in Millbrae, CA
Compare 126 general contractors in Millbrae by license status, permits and score.
See general contractors in Millbrae → All contractors in Millbrae