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Contractor license records in Frederick, MD

6 records with Frederick as their locality of record in L&I's records, as of November 3, 2026. Statuses print as the board records them; a record listed as suspended is not a current credential.

Source: Washington State Department of Labor & Industries (L&I) — records as of November 3, 2026. Records change; the board’s own L&I Verify a Contractor is the current source.

By specialty in Frederick

GENERAL (4) · Tanks and Tank Removal (2)

• ALL AMERICAN PROPANE ACTIVE
  License ALLAMAP781OF · expires September 18, 2028
• LYNGSOE SYSTEMS INC ACTIVE
  License LYNGSSI797MG · expires October 26, 2027
• MARK YOUNG CONSTRUCTION LLC ACTIVE
  License MARKYYC803NL · expires September 10, 2028
• NEW ENERGY STRUCTURES COMPANY ACTIVE
  License NEWENES746CR · expires February 23, 2028
• PROPANE NORTHWEST ACTIVE
  License PROPAN*835PD · expires October 6, 2027
• WINDOW INST SPECIALISTS INC ACTIVE
  License WINDOIS019R9 · expires October 21, 2027