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Paul A. CallahanLicensed

Licensed septic contractor based in Frederick, MD

Name	Paul A. Callahan
Company	Pole Buildings Plus, Inc
License number	02545
License type	Registered On-Site Wastewater (Septic) Professional
License status	Current — MD State Board of On-Site Wastewater Professionals
License expires	2028-12-31
Based in	Frederick, Maryland 21701
Phone	(301) 829-6639

"Based in" is the city on the business's state license record. That can be a mailing address; it doesn't tell you where the business works.

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How to verify this license

We publish the license details exactly as they appear in Maryland's official licensing records; we do not vouch for the business itself. Before hiring, look up license #02545 directly with the state, confirm it is still active, and ask for a current certificate of insurance.

Source: MD State Board of On-Site Wastewater Professionals - registered individuals, last checked 2026-08-17. Verify at the official source.

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