SANDSTONE ENVIRONMENTAL ENGINEERING INC

California contractor license #878348 · Oakley, Contra Costa County

License

License number
878348
Status
Clear
Classifications
  • A General Engineering Contractor
  • ASB Asbestos Certification
  • B General Building Contractor
  • C-12 Earthwork and Paving Contractor
  • C-21 Building Moving/Demolition Contractor
  • C-22 Asbestos Abatement Contractor
  • HAZ Hazardous Substance Removal Certification
Business type
Corporation
Issued
May 24, 2006
Expires
Jul 31, 2028
Workers' compensation
Workers' Compensation Insurance — State Compensation Insurance Fund
Contractor's bond
$25,000 — Western Surety Company
DIR public works registration
Registered through Jun 30, 2028

From the California Contractors State License Board (CSLB) public license file, last updated Aug 25, 2026. Verify license #878348 on CSLB's License Check.

California public works

SANDSTONE ENVIRONMENTAL ENGINEERING INC appears on 17 public works projects registered with the California Department of Industrial Relations, 4 of them as the prime contractor, for 13 awarding bodies between 2017 and 2026. Projects it led total $1,400,054 in reported contract value.

Most recent public works projects
DateProjectAwarding bodyRoleContract amount
May 19, 2026Gnoss Field Fuel Farm SC UpgradeElectrical, low voltage & AVMarin County Public WorksPrime$460,000
Mar 26, 2026Orchard ES New Portable SiteworkDemolition & site workVacaville Unified School DistrictPrime$383,000
May 13, 2025Water Line Improvement - Kent DriveWaterCity of BrentwoodSubcontractor$284,420
May 12, 2025SDC Portable at Del Rey ESBuildings & facilitiesOrinda Union School DistrictSubcontractor$270,000
May 7, 2025Upper Elm Pathway Improvement ProjectOtherCity of LarkspurPrime$379,294
Apr 16, 2025MCOE Portable Demolition at La Joya.Demolition & site workMonterey County Office of EducationSubcontractor$98,300
Nov 26, 2024Concrete Pathway RepairsConcrete & masonryCity of AntiochPrime$177,760
May 20, 2024Kennedy HS Portable Demo ProjectDemolition & site workWest Contra Costa Unified School DistrictSubcontractor—
May 13, 2024PMP 2024 - ConcretePaving & streetsCity of BrentwoodSubcontractor—
Apr 15, 2024CURB, GUTTER & SIDEWALK REPAIR INCLUDINGPaving & streetsCity of AntiochSubcontractor—
Apr 1, 2024PAEC Restrooms Portable Bldg. ProjectSewer & wastewaterPittsburg Unified School DistrictSubcontractor—
Jan 9, 2024Adams MS Building CleanupBuildings & facilitiesWest Contra Costa Unified School DistrictSubcontractor—
Nov 12, 2023Arlington park ImprovementsParks, landscape & fieldsCity of El CerritoSubcontractor—
Jun 15, 2023North Richmond Farm Phase 2-IDemolition & site workUrban TilthSubcontractor—
Jun 2, 2022Lone Tree School Site ProjectParks, landscape & fieldsBrentwood Union School District -Subcontractor—
Apr 25, 2022Kennedy HS Fence ProjectBuildings & facilitiesWest Contra Costa Unified School DistrictSubcontractor—
Sep 1, 2017CURB, GUTTER & SIDEWALK REPAIRPaving & streetsCity of AntiochSubcontractor—

Most recent 17 of 17. Contract amounts are the whole project's, as the awarding body reported them to DIR (reported since July 2024); a role is "Prime" when the awarding body registered the contractor on the project.

Awarding bodies it works for most

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