THOMPSONGAS, 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, 78% are site work.

Site 38

Plumbing 11

Typical job observed: 297,000 BTU.

Recent work

• Propane tank install
  August 2026 · Howard County

  Sfd//install (1) 1000 gal underground propane tank

• Generator install 330,000 BTU
  May 2026 · Howard County

  Sfd// run 1/2" line from propane tank to generator (330,000btu)

• Generator install 297,000 BTU
  April 2026 · Howard County

  Sfd// run line from tank to generator (297000 BTU)

• Generator install 279,000 BTU
  March 2026 · Howard County

  Sfd//run 1/2" line from propane tank to generator 279,000 BTU

• Generator install 278,000 BTU
  February 2026 · Howard County

  Sfd// run 1/2" line from tank to generator 278,000 BTU

• Generator install
  January 2026 · Howard County

  Sfd// install (2) 120GAL above ground asme propane tanks w/ line to generator

• Interior work
  November 2025 · Howard County

  SUITE 109/ROYAL RINSE LAUNDROMAT BLD 1 /Run 1/2” line from (4) 120 gal DOT tanks to stub out.

• Generator install 260,000 BTU
  October 2025 · Howard County

  Run line from existing tank to generator (260,000btu)

• Generator install 327,000 BTU
  October 2025 · Howard County

  Sfd// run line from tank to generator (327,000btu)

Licensing

• Propane 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: 49 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 THOMPSONGAS, LLC under Propane 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 Site contractors in Howard County