O'connor Plumbing & Heating

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, 73% are plumbing work.

Plumbing 27

HVAC 9

Pool & Spa 1

Recent work

• Interior work
  December 2025 · Frederick County

  Cap and make safe: Dryer and Range gas line, Bathtub drain and water lines. Rough-in plumbing and connecting Hand sink,…

• Interior install
  February 2025 · Frederick County

  Capping off a preexisting shower and installing (2) new urinals to the preexisting plumbing. **No construction or struc…

• Plumbing repair
  March 2024 · Frederick County

  Pigtail repair

• Plumbing replacement
  March 2024 · Frederick County

  Water service replacement

• Gas water heater replacement
  September 2023 · Frederick County

  replace a 50-gallon natural gas atmospheric vented water heater with a 75-gallon natural gas atmospheric vented water h…

• Interior replacement
  September 2023 · Frederick County

  Replace a tub with a shower in the master bathroom..

• Plumbing install
  July 2023 · Frederick County

  Install a new black steel gas line for a new gas fireplace up to 25 feet in total length.

• Kitchen renovation
  June 2023 · Frederick County

  install a new kitchen sink and hose bib in basement

• Generator install
  May 2023 · Frederick County

  Running new natural gas line for generator.

• Plumbing relocation
  May 2023 · Frederick County

  relocate a gas range line up to five feet

Licensing

Frederick County does not publish license records with its permit data, so none appear here. That is a gap in the county's published data, not a statement about this contractor.

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: 37 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 here do not list a license type for this contractor. That does not mean the contractor is unlicensed; not every county publishes license data with its permits.

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.

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