Solar Permit in Sussex County, Delaware
Permit required
Yes, a permit is required
Before installing roof or ground mounted solar panels.
Issued bySussex County Building Permit Office and Building Code Office
By Mario Bailey, verified against official sources
Quick answer
Sussex County requires a county permit for solar panel installations, both ground mounted and structure mounted. Solar projects get a final zoning inspection; the electrical side needs a state-licensed inspection agency certificate.
Who is pulling this permit?
Apply yourself
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
Delaware's owner-builder rule (9 Del. C. 6302(b); 9 Del. C. 4402(b); 24 Del. C. 1417; 24 Del. C. 1807(c)(2); 24 Del. C. 1820(c)(2); 16 Del. C. 7906(c)) sets what you may do on your own home without hiring anyone. Read the statute.
When a permit is usually needed
Before installing roof or ground mounted solar panels.
What a solar permit costs in Sussex County
How to apply in Sussex County
In Sussex County, a rooftop solar PV permit application is a combined structural and electrical plan set: a site plan and roof framing details proving the array's mounting can carry its added loads, plus a one line electrical diagram covering listed modules and inverters, disconnects, and the rapid shutdown design. Utility interconnection is a separate approval that runs in parallel with the permit.
What most solar permit applications include:
- Both a building permit and a separate electrical permit are required, since the array must be designed and installed to the residential code's solar provisions and to the National Electrical Code (IRC R324.3).
- For Sussex County, the plan set identifies listed equipment: PV modules listed to UL 1703 (or both UL 61730-1 and UL 61730-2), and inverters listed to UL 1741, with grid-tied inverters listed for utility interaction (IRC R324.3.1).
- Structural drawings show that the roof framing is designed to structurally support the array and withstand the gravity loads it adds (IRC R324.4.1).
- For Sussex County, the site plan lays out roof access pathways at least 36 inches wide, plus a ridge setback sized to how much of the roof the array covers, so firefighters retain pathways and ventilation access (IRC R324.6.1, IRC R324.6.2).
- For Sussex County, the one line electrical diagram shows the rapid shutdown method and the location of its single initiation device, since one control point must bring all system conductors down to safe levels (NEC 690.12, NEC 690.56(C)).
- Interconnecting the array to the utility grid at a defined point of connection is a separate application process from the local building or electrical permit and must be approved before the system can operate (NEC 705.12).
- Some permitting offices route applications through SolarAPP+, an automated review platform that checks the plan set against code requirements and issues eligible permits instantly (DOE SolarAPP+).
General submittal guidance from IRC 2021 R324 (Solar Energy Systems) and NEC 2020 Article 690 (Solar Photovoltaic Systems) and Article 705 (Interconnected Power Production Sources). Source. Sussex County Building Permit Office and Building Code Office sets the exact checklist for Sussex County.
Where to apply in Sussex County:
Sussex County Building Permit Office and Building Code Office
- 2 The Circle, P.O. Box 589, Georgetown, DE 19947
- Phone: (302) 855-7720
- Email: buildinginspections@sussexcountyde.gov
Solar Permit in Sussex County compared with nearby Delaware localities
| Locality | Permit needed? | Threshold | What each Delaware schedule says | Verified |
|---|---|---|---|---|
| Sussex County | Permit required | Any size | ...County Building Permit Fee Guide: construction value (table rates such as... | |
| New Castle County | It depends | Rooftop panels on a one- or two-family dwelling are exempt from the County building permit; electrical work still goes through the State | Not published |
Inspections and closing out your permit
In Sussex County, inspectors verify the installed array against the approved plans, and some agencies run a rough check of roof attachments and penetrations while they are still exposed before the wiring and roofing close them in. The final inspection confirms rapid shutdown, disconnects, grounding, and required labels are installed correctly, and the system cannot be energized until the utility separately approves interconnection.
- In Sussex County: where an agency runs a rough or pre-inspection, it checks the array's roof penetrations while they are still exposed, confirming they are flashed and sealed (IRC R324.4.3).
- In Sussex County: the inspector confirms whether rapid shutdown is required, how it is accomplished, and that it is properly identified (NEC 690.12, NEC 690.56(C)).
- In Sussex County: pV disconnecting means must be permanently marked and installed where they are readily accessible, which the inspector confirms in the field (NEC 690.13).
- In Sussex County: bonding and grounding of the array, including every exposed non current carrying metal part and the grounding electrode system, is checked before sign off (NEC 690.43, NEC 690.47).
- In Sussex County: at the service equipment, the inspector looks for the required rapid shutdown placard, a labeled diagram showing the initiation device's location in the specified colors and letter sizes (NEC 690.56(C)).
- In Sussex County: utility interconnection is inspected and approved separately from the local building department's sign off, and the system cannot be energized until both approvals are in hand (NEC 705.12).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Sussex County permit portal or by phone at (302) 855-7720.
Inspection sequence from NEC 2020 Article 690 (690.12 rapid shutdown, 690.13 disconnects, 690.43/690.47 grounding, 690.56 labeling) and IRC 2021 R324.4.3 (roof penetrations). Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Solar Permit checklist for Sussex County
- Confirm the requirement. Yes, a permit is required. Usually needed: Before installing roof or ground mounted solar panels.
- Budget the fee. Sussex County Building Permit Fee Guide: construction value (table rates such as $128.10/sq ft residential, $52.23/sq ft garage or pole building, $23.36/sq ft unfinished area such as a deck, porch or shed, or actual value if not listed); building permit fee for property outside town limits is $5.00 for the first $1,000 of construction value and $2.50 for each additional $1,000; plus a Fire District Fee of .0015 of construction value; plus a School Surcharge of $5.00 per $1,000 on permits with a construction value of $150,000 or above. Where the Building Code Office reviews and inspects, a separate plan review and inspection fee applies (schedule effective July 1, 2026): Residential Projects under 1,000 SF $120 base covering 5 inspections, $60 per inspection after the initial 5. Official fee schedule.
- Apply. In Sussex County, a rooftop solar PV permit application is a combined structural and electrical plan set: a site plan and roof framing details proving the array's mounting can carry its added loads, plus a one line electrical diagram covering listed modules and inverters, disconnects, and the rapid shutdown design. Utility interconnection is a separate approval that runs in parallel with the permit. Start at the Sussex County permit portal.
- Keep the office details handy. Sussex County Building Permit Office and Building Code Office. Phone: (302) 855-7720. Address: 2 The Circle, P.O. Box 589, Georgetown, DE 19947.
- Plan for inspections. In Sussex County, inspectors verify the installed array against the approved plans, and some agencies run a rough check of roof attachments and penetrations while they are still exposed before the wiring and roofing close them in. The final inspection confirms rapid shutdown, disconnects, grounding, and required labels are installed correctly, and the system cannot be energized until the utility separately approves interconnection.
Compiled from the official sources on this page. Last checked .
Frequently asked questions
- Do you need a solar permit in Sussex County?
- Sussex County requires a county permit for solar panel installations, both ground mounted and structure mounted. Solar projects get a final zoning inspection; the electrical side needs a state-licensed inspection agency certificate. Always confirm with the Sussex County Building Permit Office and Building Code Office before starting.
- How much does a solar permit cost in Sussex County?
- Sussex County Building Permit Fee Guide: construction value (table rates such as $128.10/sq ft residential, $52.23/sq ft garage or pole building, $23.36/sq ft unfinished area such as a deck, porch or shed, or actual value if not listed); building permit fee for property outside town limits is $5.00 for the first $1,000 of construction value and $2.50 for each additional $1,000; plus a Fire District Fee of .0015 of construction value; plus a School Surcharge of $5.00 per $1,000 on permits with a construction value of $150,000 or above. Where the Building Code Office reviews and inspects, a separate plan review and inspection fee applies (schedule effective July 1, 2026): Residential Projects under 1,000 SF $120 base covering 5 inspections, $60 per inspection after the initial 5. See the official fee schedule for current amounts.
- Where do you apply for a solar permit in Sussex County?
- You can apply through the Sussex County permit portal or contact the Sussex County Building Permit Office and Building Code Office directly. The links are listed on this page.
- Can a homeowner pull a solar permit themselves in Sussex County?
- Under Delaware law (9 Del. C. 6302(b); 9 Del. C. 4402(b); 24 Del. C. 1417; 24 Del. C. 1807(c)(2); 24 Del. C. 1820(c)(2); 16 Del. C. 7906(c)): Yes. Delaware homeowners may pull permits and do their own work, with trade-specific conditions. Sussex County's statute expressly lets any owner who wants to do their own work on their own building get a permit, and Kent County issues permits in the owner's name. For electrical work, a homeowner wiring their own home that is not for sale or rent must get a homeowner's permit from the Board of Electrical Examiners and pass a final inspection; swimming pools and hot tubs are excluded. Homeowners may do their own plumbing and HVACR work (but not gas piping) in their own home that is not for sale, rent or lease, and for plumbing must file a permit application with the inspection authority. Confirm how Sussex County applies this before you apply.
From the Library
What else needs a permit in Sussex County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Bathroom Remodel Permit | It depends | Cosmetic finishes and like-for-like fixture swaps versus renovation, relocated or added plumbing, or new electrical work | ...County Building Permit Fee Guide: construction value (table rates such as... |
| Deck Permit | Permit required | Any size | ...County Building Permit Fee Guide: construction value (table rates such as... |
| Electrical Permit | Permit required | Any size | See schedule |
| EV Charger Permit | Permit required | Any size | See schedule |
| Fence Permit | Permit required | Any size | ...County Building Permit Fee Guide: construction value (table rates such as... |
| HVAC Permit | It depends | Replacement of existing equipment versus a new installation or additional unit | ...County Building Permit Fee Guide: construction value (table rates such as... |
| Patio Permit | Permit required | Any size | ...County Building Permit Fee Guide: construction value (table rates such as... |
| Plumbing Permit | Permit required | Any size | Division of Public Health: $100 per plumbing permit (covers 3 inspections) |
| Pool Permit | Permit required | Any size | ...County Building Permit Fee Guide: construction value (table rates such as... |
| Roof Replacement Permit | It depends | Permit applies when the job includes structural sheathing or a change in roofing material | ...County Building Permit Fee Guide: construction value (table rates such as... |
| Shed Permit | Permit required | Any size | ...County Building Permit Fee Guide: construction value (table rates such as... |
| Water Heater Permit | It depends | Replacement of an existing water heater versus a new or relocated one | DPH plumbing permit $100 when one is required |
Solar Permit in other Delaware localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Sussex County documents; the office above sets the local rules.
How this solar permit page for Sussex County was verified. 2 official sources: sussexcountyde.gov, sussexcountyde.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Sussex County Building Permit Office and Building Code Office. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare Solar Permit requirements across Delaware localities