Contractor permit directory

Contractors active in Maryland county permit records, grouped from public filings. Counts reflect permits attributed to each firm. Not every filing names a contractor, so counts here are a floor. A firm's actual permit activity is usually higher.

All counties Baltimore County Frederick County Howard County
All trades Accessory Structure Deck & Patio Electrical Fire Protection Interior HVAC Plumbing Pool & Spa Sign Site Solar Structural
ContractorTradeCountiesPermitsLast active
SUNRUN INSTALLATION SERVICES INC Solar Frederick County, Howard County 267 Jul 2026
SOLAR ENERGY WORLD Solar Frederick County, Howard County 109 Jul 2026
FUSION SOLAR SERVICES LLC Solar Frederick County, Howard County 106 Jul 2026
CELESTIAL SOLAR INNOVATIONS LLC Solar Frederick County, Howard County 44 Jul 2026
D & L CLEAN POWER SOLUTIONS LLC Solar Frederick County, Howard County 33 Jun 2026
Tesla Energy Operations, Inc. Tesla Energy Operations, Inc. Solar Frederick County 23 Jul 2026
TRINITY SOLAR LLC Solar Frederick County, Howard County 23 Jun 2026
Top tier solar solutions LLC Solar Frederick County 7 May 2026
Nova Solar, Inc. Solar Frederick County, Howard County 4 Jul 2026
Roofsimple INC dba Solarsimple Solar Frederick County 4 Apr 2026
Brandon K Shores Solar Frederick County 3 Jun 2026
Solar Installers Near Me LLC Solar Frederick County 3 Jun 2026
SUSTAINABLE ENERGY SYSTEMS Solar Frederick County, Howard County 3 Jun 2026
Venture Home Solar, LLC Solar Frederick County, Howard County 3 Jun 2026

Source: county permit records. Updated monthly.