Home improvement contractor · Brightwaters, NY

Donald Thornberg Building Corporation

Suffolk County licenseLicensed
Licensed by
Suffolk County
Based in
Brightwaters, NY 11718
Licensed since
1978 · 48 yrs
License holder
Kane Thornberg

Services

As listed on the license: General Contractor

License details

License #Issued byTypeStatusIssuedExpires
H-4540Suffolk CountyHome improvementActiveAug 1978Jul 2028

Verify this license with Suffolk County Consumer Affairs licensing before signing a contract.

Before you hire on Long Island

  • Check the license number with the county that issued it. Nassau and Suffolk each license home improvement contractors separately.
  • Ask for proof of insurance: general liability, plus workers' compensation if they have employees.
  • Get a written contract with the price, payment schedule, start and finish dates, and the work described in detail.
  • Confirm permits with your town or village building department before work starts.

Read the full hiring checklist →

Call (631) 583-5277