Licensed system designers in New Castle County, Delaware
15 companies on Delaware’s roster of licensed Class B and Class C designers give New Castle County as their address. A licensed designer is a business the state has licensed for the work that designs onsite wastewater systems.
- Anderson Civil Engineering(302) 540-2274MiddletownEvaluatorDesigner
- Apex Engineering(302) 994-1900 ext. 206NewportDesignerInspector
- Artesian Water Company(302) 453-2396NewarkDesigner
- Clifton L. Bakhsh, Jr., Inc.(302) 378-8009MiddletownDesigner
- Duffield Assicoates, Inc(302) 239-6634WilmingtonEvaluatorDesigner
- Duffield Associates(302) 674-9280WilmingtonDesigner
- Howard L Robertson(302) 764-2456WilmingtonDesigner
- Jeff Bartsch Trucking And Excavating Incorporated(302) 653-9329TownsendDesignerContractor
- KCI Technologies(302) 731-9176NewarkDesigner
- Landmark Engineering, Inc(302) 737-9335NewarkDesigner
- MRA Engineering(302) 326-2200New CastleDesigner
- Pennoni Associates, Inc(302) 655-4451NewarkDesigner
- Septic Solutions, LLC(302) 438-7498NewarkDesignerInspector
- Sterling Cabinetry & Carpentry(302) 367-4311MiddletownDesignerInspectorContractor
- Vandemark & Lynch Inc(302) 764-7635WilmingtonDesigner
| Company | Licensed for | Phone |
|---|---|---|
| Anderson Civil EngineeringMiddletown | EvaluatorDesigner | (302) 540-2274 |
| Apex EngineeringNewport | DesignerInspector | (302) 994-1900 ext. 206 |
| Artesian Water CompanyNewark | Designer | (302) 453-2396 |
| Clifton L. Bakhsh, Jr., Inc.Middletown | Designer | (302) 378-8009 |
| Duffield Assicoates, IncWilmington | EvaluatorDesigner | (302) 239-6634 |
| Duffield AssociatesWilmington | Designer | (302) 674-9280 |
| Howard L RobertsonWilmington | Designer | (302) 764-2456 |
| Jeff Bartsch Trucking And Excavating IncorporatedTownsend | DesignerContractor | (302) 653-9329 |
| KCI TechnologiesNewark | Designer | (302) 731-9176 |
| Landmark Engineering, IncNewark | Designer | (302) 737-9335 |
| MRA EngineeringNew Castle | Designer | (302) 326-2200 |
| Pennoni Associates, IncNewark | Designer | (302) 655-4451 |
| Septic Solutions, LLCNewark | DesignerInspector | (302) 438-7498 |
| Sterling Cabinetry & CarpentryMiddletown | DesignerInspectorContractor | (302) 367-4311 |
| Vandemark & Lynch IncWilmington | Designer | (302) 764-7635 |
What “Licensed system designer” means in Delaware
Being on this roster means Delaware DNREC has licensed this business for designs onsite wastewater systems. It is not a rating, a review, or a statement about price, insurance or workmanship.
Every licence in the published dataset carries an approved status; DNREC republishes the dataset as licences change.
Before you hire, confirm the licence with DNREC, or the state's own licensee dataset. How to verify →
Licensed system designers in neighbouring counties
Records as published August 26, 2026. Report a correction.