Contractor permit directory

Contractors observed in Maryland county permit records, grouped from public filings. Our observation is not complete: not every filing names a contractor, so a firm's real activity is almost always greater than what appears here.

All counties Anne Arundel County Baltimore County Frederick County Howard County Prince George's County

All trades Accessory Structure Deck & Patio Electrical Exterior Fire Protection Gas Interior HVAC Plumbing Pool & Spa Sign Site Solar Structural

KLM MECHANICAL HVAC/Anne Arundel County, Howard County 24 permits/to Sep 2026
Masters Mid Atlantic, LLC HVAC/Howard County 24 permits/to May 2025
ALL AMERICAN MECHANICAL INC HVAC/Anne Arundel County, Howard County 23 permits/to Jun 2026
EMC POWER SOLUTIONS INC HVAC/Anne Arundel County, Frederick County, Howard County 23 permits/to Sep 2026
FALCON HEATING & AIR CONDITIONING INC HVAC/Howard County, Prince George's County 23 permits/to Sep 2026
F H FURR PLUMBING, HTG & A/C HVAC/Anne Arundel County 23 permits/to Aug 2026
KASCON INC HVAC/Howard County 23 permits/to Jun 2026
A-C AIR CARE LLC HVAC/Anne Arundel County, Howard County 22 permits/to Aug 2026
MURRAYS PLUMBING & HEATING,LLC HVAC/Anne Arundel County 22 permits/to Sep 2026
GLOBAL HVAC LLC HVAC/Anne Arundel County, Howard County 21 permits/to Jul 2026
J&J MECHANICAL LLC HVAC/Anne Arundel County, Howard County 21 permits/to Jul 2026
SuperTech HVAC Services, Inc. HVAC/Anne Arundel County, Howard County 21 permits/to Aug 2026
WISNER MECHANICAL LLC HVAC/Howard County 21 permits/to Jul 2025
ASC HEATING & AIR CONDITIONING, INC. HVAC/Howard County 20 permits/to Sep 2024
CONSTELLATION HOME PRODUCTS & SERICES HVAC/Howard County 20 permits/to Sep 2024
FH FHURR HVAC/Prince George's County 20 permits/to Sep 2026
M&A HEATING AND COOLING HVAC/Anne Arundel County, Howard County 20 permits/to Aug 2026
A.P. WOODSON/PETRO HOME SERVICES HVAC/Anne Arundel County 19 permits/to Sep 2026
BAY AREA MECHANICAL SVCS INC. HVAC/Anne Arundel County 19 permits/to Aug 2026
GROVE HEATING AND COOLING, INC. HVAC/Anne Arundel County, Howard County 19 permits/to Aug 2026
SUPREME AIR LLC /DBA/ SUPREME SERVICE TODAY HVAC/Howard County 19 permits/to Sep 2026
UNITED AIR-TEMP AIR CONDITIONING AND HEATING LLC HVAC/Prince George's County 19 permits/to Sep 2026
B&B A/C & Heating Service Co Inc HVAC/Frederick County 18 permits/to Mar 2024
BELTWAY AIR CONDITIONING & HEATING HVAC/Frederick County, Howard County 18 permits/to Aug 2026
HONEST AIR, LLC HVAC/Howard County 18 permits/to Aug 2026
HVACR 05010021796 HVAC/Howard County 18 permits/to Apr 2026
SG HEATING & COOLING HVAC/Howard County 18 permits/to Jul 2026
ADVANCED HEATING & COOLING, LLC HVAC/Anne Arundel County, Howard County 17 permits/to Aug 2026
GLM MECHANICAL SERVICES INC. HVAC/Howard County 17 permits/to Aug 2026
HVACR 05010083311 HVAC/Howard County 17 permits/to Aug 2026
JAMES J MYERS HVAC/Frederick County 17 permits/to Jul 2026
JOE'S HEATING & AC INC HVAC/Howard County 17 permits/to Jun 2024
TOTAL COMFORT HEATING & AIR CONDITIONING, INC. HVAC/Howard County 17 permits/to Jul 2026
DBA ENVIRO-TEK SERVICES HVAC/Howard County 16 permits/to Aug 2026
HVAC PRECISION SERVICES, INC HVAC/Anne Arundel County, Howard County 16 permits/to Aug 2026
PLUS CONSTRUCTION LLC HVAC/Anne Arundel County, Frederick County, Howard County 16 permits/to Jul 2026
RELIABLE HVAC INC HVAC/Anne Arundel County, Howard County 16 permits/to Aug 2026
WEHN HVAC, INC. HVAC/Anne Arundel County 16 permits/to Aug 2026
D & I MECHANICAL CONTRACTORS HVAC/Anne Arundel County 14 permits/to Jul 2026
EDGE ENERGY DBA EQUITY DEV. HVAC/Anne Arundel County 14 permits/to Aug 2026
JDL HVAC SERVICES LLC HVAC/Anne Arundel County, Howard County 14 permits/to Jul 2026
MARYLAND SILA HEATING AND AIR HVAC/Howard County 14 permits/to Oct 2024
MAYNE MECHANICAL LLC HVAC/Anne Arundel County, Howard County 14 permits/to Jun 2026
MONOCACY CHIMNEY CARE HVAC/Frederick County 14 permits/to Aug 2026
ONE HOUR A/C & HEATING HVAC/Anne Arundel County, Howard County 14 permits/to Aug 2026
PAUL VINCENT WOODS HVAC/Anne Arundel County 14 permits/to Aug 2026
TECO HVAC & HOME IMPROVEMENTS LLC HVAC/Howard County 14 permits/to Aug 2026
THOMAS N. O'CONNOR PLUMBING AND HEATING, LLC HVAC/Howard County 14 permits/to Mar 2026
GREENFOX SERVICES, INC. HVAC/Howard County 13 permits/to Jul 2026
HVAC ENTERPRISES, INC. HVAC/Anne Arundel County, Howard County 13 permits/to Sep 2026

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Source: county permit records. Updated weekly.