Markool Heating & Cooling 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, 81% are plumbing work.

Plumbing 13

HVAC 2

Accessory Structure 1

Each county's permit system holds only their own records, so the combined view above exists nowhere else.

Recent work

• Water heater replacement
  August 2024 · Frederick County

  Water heater replacement from a standard tanked water heater to a tankless

• Interior addition
  June 2024 · Frederick County

  Wiring an addition which will include a new bathroom and washing machine hook up. Homeowner also has radon piping that …

• Plumbing replacement
  April 2024 · Frederick County

  Replacing the water service for the home

• Kitchen renovation
  March 2024 · Frederick County

  Installing the LP gas range located in the kitchen

• Accessory structure work
  January 2024 · Frederick County

  Converting garage to be rec. room with wet bar - no appliances, full bath

• Gas water heater replacement
  November 2023 · Frederick County

  50 gallon natural gas water heater replacement.

• Basement finishing
  November 2023 · Frederick County

  Installing (1) laundry sink in the basement located in the living room area. New sink drain will be tied into the 4” PV…

• HVAC work
  October 2023 · Howard County

  Add two Supply's off main trunk line for basement. **NEED REVISED DRAWING & LETTER **

• Plumbing work
  October 2023 · Frederick County

  Interior RenovationNeed to pull a permit to get the work that has been started by another plumber.

• Interior work
  October 2023 · Frederick County

  Finishing roughed in bathroom in basement that has the ground work completed already. (1) Shower, (1) toilet & (1) vani…

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

• Frederick County: 15 permits observed, from records beginning August 2021.
• Howard County: 1 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 Markool Heating & Cooling 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 Plumbing contractors in Frederick County