WISNER MECHANICAL LLC

Permits are pulled before work begins and then inspected by the county. A contractor who files them is working inside a system with an inspector in it, which is what unpermitted work avoids.

What the permits show

Of the permits we observed, 95% are HVAC work.

HVAC 20

Accessory Structure 1

Recent work

• HVAC addition
  July 2025 · Howard County

  Adding ductwork from existing system to serve new addition / ENERGY METHOD = Prescriptive Method

• Heat pump install
  April 2025 · Howard County

  Installing 2 new 20seer Bosch Heat pumps and all new duct to accommodate new addition and existing house re model. one …

• Basement finishing
  February 2025 · Howard County

  Adding supply and return duct to condition basement that is being remodeled - ( Adding 1 Return air (8) , Adding transf…

• Accessory structure install
  December 2024 · Howard County

  Installing 2 zone Mitsubishi ductless Mini-split to serve 4 seasons room and shop/garage / ENERGY METHOD = Prescriptive…

• Interior addition
  September 2024 · Howard County

  adding supply ducts for new two story addition to accommodate heating and cooling needs. Venting 2 bath fans, venting r…

• Interior work
  September 2024 · Howard County

  Adding 4 supply vents, return vents, bath exhaust to basement that is being finished

• HVAC work
  May 2024 · Howard County

  Adding 3 supply ducts and return to basement remodel. **NO STOVE/RANGE ALLOWED**

• Bathroom renovation
  April 2024 · Howard County

  Venting 4" bathroom exhaust fan and 6" 390cfm range hood to exterior of house for renovations

• Kitchen renovation
  November 2023 · Howard County

  Moving 3-6" supply runs that fed 2nd floor of house from basement over 1 bay to accommodate bigger door opening for kit…

Licensing

• Maryland HVACR Contractor Issued by Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration. Verify

Towns we observed them working in

We hold permit records for Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Frederick County, Howard County, Prince George's County, and Washington DC. Work anywhere else is not missing from this contractor's record, it is outside what we cover.

Permits by year

Our records for this contractor's counties begin August 2021. Years before that are not shown because we hold nothing for them, not because nothing happened.

What this page is, and is not

• Howard County: 21 permits observed, from records beginning August 2021.

This page shows permits we observed in county records. Our observation is not complete: work done before those dates, in counties we do not cover, or on filings that name no contractor does not appear here. A contractor's real work is almost always greater than what we observed, and absence of a permit on this page does not mean the work was not done or not permitted. We currently hold records for Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Frederick County, Howard County, Prince George's County, and Washington DC; see permit coverage for what that includes.

Common questions

Does a permit record mean this contractor is licensed?

County permit records list WISNER MECHANICAL LLC under Maryland HVACR Contractor. Check current standing with the issuing body before hiring.

Why do some contractors show more permits than others?

Counties began publishing at different times and describe contractors differently, so the number reflects what we observed as much as what the contractor did. It is not a ranking.

What should I still ask for?

Proof of insurance, a written contract, and the license number for the trade being performed. A permit record is a starting point, not a substitute for either.

Other HVAC contractors in Howard County