DENNISON PLUMBING & HEATING 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, 85% are plumbing work.

Plumbing 22

Pool & Spa 2

Fire Protection 1

HVAC 1

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

Recent work

• Water heater replacement
  May 2026 · Howard County

  Chesapeake Conference Seventh Day Advent/This a brand-new building .This work will be done in Suite A- On the 1st Floor…

• Kitchen renovation
  October 2025 · Frederick County

  New Tenant Fit out - Installing 1 toilet , 1 lavy, 1 kitchen sink, 1 water heater, 1 mop sink, 1 drinking fountain, 1 p…

• Furnace install
  September 2025 · Frederick County

  Installing 2 Toilets, 3 Lavys, 1 Shower, 1 Mop Sink, 1 Washer/Dryer Connection, 1 Hosebib Changing out 1 Electric Water…

• Interior install
  May 2025 · Frederick County

  New Tenant fit out- Installing 3 single bathrooms and 2 gang bathrooms

• Plumbing install
  February 2025 · Frederick County

  Install plumbing in rebuild of SFD destroyed by fire # 488521

• Interior work
  July 2024 · Frederick County

  3 bathrooms in a new building

• Interior replacement
  July 2024 · Frederick County

  Replacing interior fixtures in bathrooms.

• Plumbing addition
  June 2024 · Frederick County

  Plumbing work for new expansion of a concrete tilt building. Installing water main and sewer line for future residents,…

• Plumbing work
  May 2024 · Frederick County

  Adding 1 sink

• New garage
  October 2023 · Howard County

  Installing 1-Toilet, 1-lavy and 1-Electric Water Heater in a detached Garage

Licensing

• 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

• Frederick County: 23 permits observed, from records beginning August 2021.
• Howard County: 3 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 DENNISON PLUMBING & HEATING INC. under 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 Plumbing contractors in Frederick County