Licensed Septic Companies in Seaford, DE
10 septic companies serve Seaford, Delaware, and 10 of them hold a Delaware septic license or certification matched to the Delaware Department of Natural Resources and Environmental Control list (data as of October 2026).
Septic services in Seaford
Guides: Septic system installation · Septic inspection · Septic repair · Installation cost · Pumping cost
10 septic companies in Seaford
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Byards Construction & Sons
Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2189E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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C White And Sons
5635 Neals School Rd, Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #5845E4 (Delaware Department of Natural Resources and Environmental Control, verify)
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4171E3 (Delaware Department of Natural Resources and Environmental Control, verify)
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4175E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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Coxs Electric & Septic Systems
10851 Airport Rd, Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4065E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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Johns Septic Service
Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4183E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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McMullen Septic Service, Inc
22593 Bridgeville Hwy, Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #6330E1 (Delaware Department of Natural Resources and Environmental Control, verify)
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #5204E3 (Delaware Department of Natural Resources and Environmental Control, verify)
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4337E3 (Delaware Department of Natural Resources and Environmental Control, verify)
From their website: Installation · Inspection · Repair
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Nichols & Son Enterprises
Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2073E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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OnSite Construction
9654 Brickyard Rd, Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2274E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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R.T. Absher Jr General Contracting Inc.
27729 Absher Cir, Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4230E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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The Martin Company
Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2209E3 (Delaware Department of Natural Resources and Environmental Control, verify)
Per state license: Installation
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Willey & Co, Inc
Seaford, DE 19973 · Sussex County
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #4148E3 (Delaware Department of Natural Resources and Environmental Control, verify)
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #5953E1 (Delaware Department of Natural Resources and Environmental Control, verify)
- Licensed: Delaware DNREC Licensed On-Site Sewage System Contractor (Class E) · #2395E3 (Delaware Department of Natural Resources and Environmental Control, verify)
- +1 more credential
Per state license: Installation
No listings match those filters.
Septic licensing in Delaware
Delaware publishes its Class E septic contractor roster as public-domain open data, including company phone and email. The Delaware DNREC issues these credentials: Class E system contractor/installer license.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Seaford and whether the permit fee is in their quote.
Delaware septic licensing: agencies, license types and how to check a license →
Septic companies in Seaford: common questions
How many licensed septic companies are in Seaford, DE?
10 septic companies serve Seaford, Delaware, and 10 of them hold a Delaware septic license or certification matched to the Delaware Department of Natural Resources and Environmental Control list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in Delaware?
Delaware publishes its Class E septic contractor roster as public-domain open data, including company phone and email. The licensing body is the Delaware DNREC.
Which companies install septic systems in Seaford?
10 listings in Seaford install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Delaware license.
How do I check a septic contractor's license in Delaware?
Use the Delaware DNREC's lookup (https://data.delaware.gov/resource/376h-4rq3) and search the contractor's name or license number. Our guide to checking a septic license walks through it.