Licensed septic companies in New Castle County, Delaware

38 businesses on Delaware’s septic licensing records give New Castle County as its address.

15 licensed system contractors →9 licensed liquid waste haulers →15 licensed system designers →8 licensed systems inspectors →3 licensed site evaluators →

Licensed businesses based in New Castle County

A-1 Sanitation Service Inc
(302) 322-1074New Castle
Hauler
Anderson Civil Engineering
(302) 540-2274Middletown
EvaluatorDesigner
Apex Engineering
(302) 994-1900 ext. 206Newport
DesignerInspector
Artesian Resources
(302) 250-8364Newark
ContractorHauler
Artesian Water Company
(302) 453-2396Newark
Designer
Blevins Excavating
(302) 233-2411Newark
ContractorInspector
Clifton L. Bakhsh, Jr., Inc.
(302) 378-8009Middletown
Designer
D S Wilson
(302) 354-2779Bear
Contractor
David P Roser
(302) 218-3388Hockessin
Contractor
Duffield Assicoates, Inc
(302) 239-6634Wilmington
EvaluatorDesigner
Duffield Associates
(302) 674-9280Wilmington
Designer
First State Roll Off
(302) 376-1000Middletown
Hauler
Green Paving & Excavating
(302) 378-2965Townsend
Contractor
Hernandez Sanitation Services
(302) 685-9158New Castle
Hauler
Howard L Robertson
(302) 764-2456Wilmington
Designer
Jeff Bartsch Trucking And Excavating Incorporated
(302) 653-9329Townsend
DesignerContractor
Karl Kunkle
(302) 437-5981Wilmington
Evaluator
KCI Technologies
(302) 731-9176Newark
Designer
Kuehne Company
(302) 834-4557New Castle
Hauler
Landmark Engineering, Inc
(302) 737-9335Newark
Designer
Mark North Builders, LLC
(302) 530-3620Middletown
Contractor
Mid-State Septic Inspections LLC
(302) 218-4310Odessa
Inspector
Morgan Creek GC LLC
(302) 275-3128Middletown
Contractor
MRA Engineering
(302) 326-2200New Castle
Designer
PBF Energy
(302) 836-6737Delaware City
Hauler
Pennoni Associates, Inc
(302) 655-4451Newark
Designer
R Webb Excavating LLC
(302) 234-2534Hockessin
Contractor
Richard F Matoni General Contractor
(302) 598-4975Middletown
ContractorInspector
Robert C Peoples
(302) 836-1500Bear
Contractor
Robert Wiesner Plumbing
(302) 368-7766Newark
ContractorInspector
Septic Solutions, LLC
(302) 438-7498Newark
DesignerInspector
Sterling Cabinetry & Carpentry
(302) 367-4311Middletown
DesignerInspectorContractor
Town of Georgetown
(302) 378-2211Middletown
Hauler
Trinity Subsurface LLC
(302) 407-3697Wilmington
Hauler
United Rentals
(302) 757-9544Middletown
Hauler
Vandemark & Lynch Inc
(302) 764-7635Wilmington
Designer
W W Snyder Masonary Excavating
(302) 598-1711Middletown
Contractor
Webbys Septic Services LLC
(302) 547-8789Yorklyn
InspectorContractor

Licensed septic companies in New Castle County
Company	Licensed for	Phone
A-1 Sanitation Service IncNew Castle	Hauler	(302) 322-1074
Anderson Civil EngineeringMiddletown	EvaluatorDesigner	(302) 540-2274
Apex EngineeringNewport	DesignerInspector	(302) 994-1900 ext. 206
Artesian ResourcesNewark	ContractorHauler	(302) 250-8364
Artesian Water CompanyNewark	Designer	(302) 453-2396
Blevins ExcavatingNewark	ContractorInspector	(302) 233-2411
Clifton L. Bakhsh, Jr., Inc.Middletown	Designer	(302) 378-8009
D S WilsonBear	Contractor	(302) 354-2779
David P RoserHockessin	Contractor	(302) 218-3388
Duffield Assicoates, IncWilmington	EvaluatorDesigner	(302) 239-6634
Duffield AssociatesWilmington	Designer	(302) 674-9280
First State Roll OffMiddletown	Hauler	(302) 376-1000
Green Paving & ExcavatingTownsend	Contractor	(302) 378-2965
Hernandez Sanitation ServicesNew Castle	Hauler	(302) 685-9158
Howard L RobertsonWilmington	Designer	(302) 764-2456
Jeff Bartsch Trucking And Excavating IncorporatedTownsend	DesignerContractor	(302) 653-9329
Karl KunkleWilmington	Evaluator	(302) 437-5981
KCI TechnologiesNewark	Designer	(302) 731-9176
Kuehne CompanyNew Castle	Hauler	(302) 834-4557
Landmark Engineering, IncNewark	Designer	(302) 737-9335
Mark North Builders, LLCMiddletown	Contractor	(302) 530-3620
Mid-State Septic Inspections LLCOdessa	Inspector	(302) 218-4310
Morgan Creek GC LLCMiddletown	Contractor	(302) 275-3128
MRA EngineeringNew Castle	Designer	(302) 326-2200
PBF EnergyDelaware City	Hauler	(302) 836-6737
Pennoni Associates, IncNewark	Designer	(302) 655-4451
R Webb Excavating LLCHockessin	Contractor	(302) 234-2534
Richard F Matoni General ContractorMiddletown	ContractorInspector	(302) 598-4975
Robert C PeoplesBear	Contractor	(302) 836-1500
Robert Wiesner PlumbingNewark	ContractorInspector	(302) 368-7766
Septic Solutions, LLCNewark	DesignerInspector	(302) 438-7498
Sterling Cabinetry & CarpentryMiddletown	DesignerInspectorContractor	(302) 367-4311
Town of GeorgetownMiddletown	Hauler	(302) 378-2211
Trinity Subsurface LLCWilmington	Hauler	(302) 407-3697
United RentalsMiddletown	Hauler	(302) 757-9544
Vandemark & Lynch IncWilmington	Designer	(302) 764-7635
W W Snyder Masonary ExcavatingMiddletown	Contractor	(302) 598-1711
Webbys Septic Services LLCYorklyn	InspectorContractor	(302) 547-8789

Who handles septic permits in New Castle County

Delaware licenses onsite wastewater work by class, and publishes the whole licensee list as open data. Each class is a separate credential — a company licensed to haul liquid waste is not thereby licensed to install a system.

How to verify a septic licence before you hire →

Towns in New Castle County

Where in the county each licensed business is based.

Licensed companies in neighbouring counties

A Delaware septic licence is valid statewide, so a company listed in an adjoining county can legally do the work in New Castle County.

Kent County39

Records as published August 26, 2026. A licence can lapse at any time — confirm with DNREC, or the state's own licensee dataset before hiring. Report a correction.