GroundRosterRyan O. LansdowneLicensed
| Name | Ryan O. Lansdowne |
| Company | Lansdowne Development Corporation |
| License number | 02497 |
| License type | Registered On-Site Wastewater (Septic) Professional |
| License status | Current — MD State Board of On-Site Wastewater Professionals |
| License expires | 2026-12-31 |
| Location | Waldorf, Maryland 20601 |
| Phone | (301) 583-6556 |
Request a quote from Ryan O. Lansdowne
How to verify this license
We publish this listing exactly as it appears in Maryland's official licensing records; we do not vouch for the business itself. Before hiring, look up license #02497 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.
Are you Ryan O. Lansdowne? Claim this listing to set your business name and add your website, service area, hours, and photos. It's free.