KNOTT MECHANICAL INC

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, 67% are HVAC work.

HVAC 8

Plumbing 4

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

Recent work

• HVAC replacement
  August 2026 · Howard County

  Replace split system for Suite I - same size and location as existing

• Water heater replacement
  August 2026 · Howard County

  Install ductless split system in water heater room

• HVAC install
  May 2026 · Anne Arundel County

  B02445088-Mechanical modification for tenant improvement on 3rd and 4th floor. Installing two (2) WSHP and relocating d…

• HVAC work
  May 2026 · Anne Arundel County

  B02438071 Tie in Ductwork as needed

• Gas water heater replacement
  January 2026 · Howard County

  Suite 300/Medstar Health Outpatient Pathology Lab/ Demo existing fixtures (eight lavatories, two urinals, eight water c…

• Plumbing repair
  March 2025 · Howard County

  Repair 3" Water main at break

• Plumbing addition 170,000 BTU
  December 2024 · Howard County

  SUITE 3035/ Chicken & Whiskey/ Gas pizza ovens under grease hood. - Replace one (1) pizza oven and add one (1) addition…

• Plumbing work
  December 2024 · Howard County

  Change out appliances ****This is for Suite 3035*** Chicken & Whiskey Columbia

Licensing

• Maryland HVACR Contractor Issued by Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration. Verify
• Master Plumber and Gas Fitter Issued by Maryland Board of Plumbing. 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: 10 permits observed, from records beginning August 2021.
• Anne Arundel County: 2 permits observed, from records beginning December 2025.

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 KNOTT MECHANICAL INC under Maryland HVACR Contractor, Master Plumber and Gas Fitter. 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