114 licensed septic contractors based in St. Mary's County. Every license number below is sourced from official Maryland records, with a link to verify it yourself.
Grouped by the county of the address on each business's state license record, which can be a mailing address; it doesn't tell you where the business works. Where the record doesn't name the county of the address, its ZIP code decides (a ZIP that crosses a county line goes to the county holding most of its homes), then its town.
W.F. Downs Plumbing LLC · Based in Clements, MD · License #02085
Larry Hils & Sons Excavating, Inc. · Based in Great Mills, MD · License #01841
CQI Home Inspections · Based in Hollywood, MD · License #02370
Cullison Excavating, LLC · Based in Callaway, MD · License #02550
James Goddard Excavating, LLC · Based in Leonardtown, MD · License #01024
D. Barnes Excavating LLC · Based in Drayden, MD · License #01011
Larry Hills and Sons Excavating, Inc. · Based in Great Mills, MD · License #01922
T & T Sweeping · Based in Clements, MD · License #02341
Cullison Excavating, LLC · Based in Callaway, MD · License #01602
John B. Hurry · Based in Clements, MD · License #00611
Robert B Excavating · Based in Mechanicsville, MD · License #00566
Tennyson Enterprises, LLC · Based in Mechanicsville, MD · License #01852
T & T Sweeping Port-o-let Service · Based in Clements, MD · License #01934
SOMD Septic · Based in Mechanicsville, MD · License #01287
Cullison Excavating, LLC · Based in Callaway, MD · License #02551
Cullison Excavating, LLC · Based in Callaway, MD · License #01568
All in One Home Inspections, LLC · Based in Hollywood, MD · License #02007
J.M. Tennyson Construction LLC · Based in Mechanicsville, MD · License #01003
Based in Hollywood, MD · License #00905
Three Notch Construction, LLC · Based in California, MD · License #01403
Septic Solutions LLC · Based in Leonardtown, MD · License #01092
Wayne's Drains & Septic · Based in Avenue, MD · License #01193
CQI Home Inspections, LLC · Based in Hollywood, MD · License #01553
Chesapeake Trails Surveying, LLC · Based in Leonardtown, MD · License #01733
C.L. Boswell Jr. Septic · Based in Mechanicsville, MD · License #00132
DFS & Associates · Based in Loveville, MD · License #00601
Countywide Septic Service · Based in Callaway, MD · License #01987
CQI Home Inspections, LLC · Based in Hollywood, MD · License #00018
Little Silences Rest Inc · Based in Leonardtown, MD · License #00969
Bean's Excavating & Hauling, LLC · Based in California, MD · License #00509
Based in Callaway, MD · License #01672
Cullison Excavating, LLC · Based in Callaway, MD · License #01569
B&D Siteworks, LLC · Based in Lexington Park, MD · License #00700
Redgate Farm Enterprises, Inc. · Based in Chaptico, MD · License #01954
Griffin General contracting · Based in Mechanicsville, MD · License #00319
E7 Hall Contractor · Based in St. Mary's City, MD · License #01182
Copsey's Septic Service, Inc · Based in Mechanicsville, MD · License #00389
CQI Home Inspections, LLC · Based in Hollywood, MD · License #01985
Bob Taylor Engineering, Inc · Based in Lexington Park, MD · License #01397
Mike Jones Plumbing, LLC · Based in Mechanicsville, MD · License #02342
G&S Port O Let and Pumping LLC · Based in Abell, MD · License #01134
Glenn G. Gass P.E. · Based in Colton's Point, MD · License #01022
Larry Hills and Sons Excavating, Inc. · Based in Great Mills, MD · License #01923
Septic Solutions LLC · Based in Leonardtown, MD · License #01091
Copsey's Septic Service, Inc · Based in Mechanicsville, MD · License #00433
J R Pereira Construction, Inc · Based in Owings, MD · License #00117
Mike Bowes & Sons Contracting · Based in Callaway, MD · License #00982
Little Silences Rest Inc · Based in Leonardtown, MD · License #01619
Carter's Septic · Based in Valley Lee, MD · License #00872
Based in Leonardtown, MD · License #00710
Guy Excavating LLC · Based in Mechanicsville, MD · License #00826
Dameron Contracting LLC · Based in Dameron, MD · License #00830
Linear Surveys Inc · Based in Leonardtown, MD · License #00839
C&C Plumbing & Septic · Based in Hollywood, MD · License #00784
J&W Excavating · Based in Leondardtown, MD · License #00612
J. Browne Excavating LLC · Based in Leonardtown, MD · License #00869
R. Victor Buckler · Based in Mechanicsville, MD · License #00870
Cullison Excavating, LLC · Based in Callaway, MD · License #02552
Mitchells Service Center LLC · Based in Hollywood, MD · License #02263
Bob Taylor Engineering, Inc · Based in Lexington Park, MD · License #01398
Darbie and Sons Excavating Inc · Based in Mechanicsville, MD · License #02078
AB&H Excavating, Inc. · Based in Callaway, MD · License #00885
T & T Sweeping Port-o-let Service · Based in Clements, MD · License #01932
JAA Services · Based in Drayden, MD · License #00286
Based in Mechanicsville, MD · License #00217
C&C Plumbing & Septic INC · Based in Hollywood, MD · License #00726
B-N-B Excavating · Based in Dameron, MD · License #01362
T & T Sweeping Port-o-let Service · Based in Clements, MD · License #01935
Eddie Guy Septic · Based in Mechanicsville, MD · License #00827
B & W Plumbing · Based in Park Hall, MD · License #02383
All in One Home Inspections, LLC · Based in Hollywood, MD · License #02006
Wally's Excavating · Based in Hollywood, MD · License #01518
Copsey's Septic Service, Inc · Based in Mechanicsville, MD · License #00410
G&S Port O Let and Pumping LLC · Based in Abell, MD · License #01133
For The Family LLC · Based in Chaptico, MD · License #01147
Lindzy Properties LLC · Based in Hollywood, MD · License #02157
Little Silences Rest Inc · Based in Leonardtown, MD · License #00917
Sloan Excavating · Based in Mechanicsville, MD · License #01361
Based in Mechanicsville, MD · License #00208
Wally's Excavating · Based in Hollywood, MD · License #01519
T&T Sweeping Port-O-Let Service Inc. · Based in Clements, MD · License #02561
Gibson Excavating · Based in Bushwood, MD · License #01834
Based in Mechanicsville, MD · License #02492
AB&H Excavating, Inc. · Based in Callaway, MD · License #00831
Larry Hills & Sons Excavating Inc · Based in Great Mills, MD · License #00867
CQI Home Inspections · Based in Hollywood, MD · License #02371
Fejes construction LLC · Based in Leonardtown, MD · License #01876
Jimmy Herbert Septic · Based in Bashwood, MD · License #01141
Nos · Based in Lexington Park, MD · License #01032
Based in Hollywood, MD · License #02246
Cullison Excavating, LLC · Based in Callaway, MD · License #02150
Larry Hills & Sons Excavating Inc · Based in Great Mills, MD · License #00871
Larry Hils & Sons Excavating, Inc. · Based in Great Mills, MD · License #01842
Cullison Excavating, LLC · Based in Callaway, MD · License #00881
All in One Home Inspections, LLC · Based in Hollywood, MD · License #01359
J. Browne Excavating LLC · Based in Leonardtown, MD · License #01788
CQI Home Inspections, LLC · Based in Hollywood, MD · License #02257
Wayne's Drains & Septic Service LLC · Based in Avenue, MD · License #01471
Wayne's Drains · Based in Avenue, MD · License #00832
Cheldine Management Consulting LLC · Based in Leonardtown, MD · License #00301
D&D Hauling & Maintain · Based in Mechanicsville, MD · License #00514
Duncan Lepper · Based in Scotland, MD · License #00679
Cullison Excavating, LLC · Based in Callaway, MD · License #02291
David L. Harris Excavating · Based in Mechanicsville, MD · License #01027
Cameron Construction Inc. · Based in Chaptico, MD · License #00377
AJ Fenwick Septic, LLC · Based in Avenue, MD · License #00062
T & T Sweeping Port-o-let Service · Based in Clements, MD · License #01931
T&T Sweeping · Based in Clements, MD · License #02339
Mike Bowes & Sons Contracting · Based in Callaway, MD · License #00981
T & T Sweeping Port-o-let Service · Based in Clements, MD · License #01933
C.L. Boswell Jr. Septic · Based in Mechanicsville, MD · License #00133
T & T Sweeping Port-o-let Service · Based in Clements, MD · License #01936
Harris Excavating Solutions LLC · Based in Hollywood, MD · License #00957
Buckler Contracting, LLC · Based in Mechanicsville, MD · License #01975
Septic (onsite wastewater) contractors handle everything from routine septic tank pumping and cleaning to repairs, inspections, and new system installation. States license each role separately (a pumper is not necessarily licensed to install, and vice versa), so match the license class to the job.
Before you sign anything: confirm the license number on this page is still active with Maryland, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.
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