Attic Efficiency INC, C-2 Insulation and Acoustical Contractor in San Francisco, CA
Attic Efficiency INC operating as a corporation holds California contractor license #1089510, which is currently expired (lapsed Apr 30, 2026) and not valid to contract until it is renewed. First issued in 2022, the license has been on the CSLB roster for 4 years. It carries a single CSLB classification: C-2 — Insulation and Acoustical Contractor. Records show a previously-filed surety bond from North River Insurance Company (the) that is no longer active and a previously-filed workers' compensation policy with State Compensation Insurance Fund that is no longer active. The business is based in San Francisco, in San Francisco County, California.
- License Number
- 1089510
- Issued
- Apr 5, 2022
- Status
- CLEAR
- Expires
- Apr 30, 2026
- Entity
- Corporation
- Surety
- North River Insurance Company (the)
- Bond Number
- 04CF642892
- Effective
- Apr 4, 2025
- Status
- Cancelled
- Cancelled
- May 7, 2026
- Coverage
- Workers' Compensation Insurance
- Carrier
- State Compensation Insurance Fund
- Policy Number
- 9385994
- Effective
- Aug 22, 2025
- Expires
- Aug 22, 2026
This contractor has a compliance issue in its public CSLB record:
- License expired
- Contractor bond cancelled
- No active workers' comp on file
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Attic Efficiency INC licensed in California?
Attic Efficiency INC previously held California Contractors State License Board license number 1089510, but the license expired on April 30, 2026 and is not currently valid. It was first issued on April 5, 2022.
What does Attic Efficiency INC specialize in?
Attic Efficiency INC is licensed for one CSLB classification: C-2 Insulation and Acoustical Contractor.
Where is Attic Efficiency INC headquartered?
Attic Efficiency INC is headquartered at 500 Beale Street #129, San Francisco, CA 94105, in San Francisco County, California.
Does Attic Efficiency INC have an active surety bond on file with CSLB?
Attic Efficiency INC has a previously-filed surety bond from North River Insurance Company (the) that is no longer active.
Does Attic Efficiency INC carry workers' compensation coverage?
Attic Efficiency INC has a previously-filed workers' compensation policy with State Compensation Insurance Fund that is no longer active.
How do I verify Attic Efficiency INC's contractor license?
You can verify Attic Efficiency INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1089510.
- License issuedApr 5, 2022
- Bond activeApr 4, 2025
- WC coverage startsAug 22, 2025
- License expiredApr 30, 2026
- Bond cancelledMay 7, 2026
- WC expiredAug 22, 2026
- Abadub Construction INC#1058008San Francisco·B General Building Contractor
- Emerald Insulation & Acoustical INC#1134153San Francisco·C-2 Insulation and Acoustical Contractor
- Eclipse Acoustics#1140353San Francisco·C-2 Insulation and Acoustical Contractor
- Anderson Rowe & Buckley INC#91594San Francisco·C-2 Insulation and Acoustical Contractor
- Standard Roofing Company#348544San Francisco·B General Building Contractor
- Temper Insulation CO INC#475279San Francisco·C-2 Insulation and Acoustical Contractor
- Gilmore E B & Sons Mechanical Services INC#740278San Francisco·C-2 Insulation and Acoustical Contractor
- City Wide Insulation Company INC#850842San Francisco·C-2 Insulation and Acoustical Contractor
Working a California job with Attic Efficiency INC, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Attic Efficiency INC? Claim or correct this profile