Dover DE Building Permits

The short version

• Two agencies, in sequence. City of Dover Department of Planning and Zoning first (zoning official letter); then Kent County Levy Court Office of Inspections and Enforcement (permit issuance and inspections).
• Online portal via My Government Online (MGO). Applications, renewals, and status tracking route through mygovernmentonline.org.
• State-aligned building code via Kent County. Dover's in-city projects are enforced under the building code adopted at the Kent County level, which aligns with International Building Code (IBC) standards for Delaware.
• Lines/Grade Surveys required (effective Dec 1, 2025) for lots under 0.5 acres or additions with more than 500 sq ft of impervious area.
• Floodplain permits required for any work in a designated floodplain — no size threshold.
• Dover zoning authority under 8 Del. C. § 700 et seq. — municipal zoning is a distinct step; don't skip it thinking Kent County covers zoning.

Where to go — primary sources

• Kent County Building Permits — the authoritative hub for permit issuance and inspection process.
• Kent County Development Resources — Permits, Building, Sewer — development-focused permit hub.
• My Government Online (MGO) Portal — application and tracking portal used by Kent County and participating municipalities.
• City of Dover Department of Planning and Zoning — for zoning approvals required before county permit issuance.
• Kent County Levy Court Office of Inspections and Enforcement — 555 Bay Rd., Dover, DE · 302-744-2451.
• MGO technical support: 1-866-957-3764.

The dual-track workflow — what's distinctive about Dover

For a building project inside Dover city limits:

1. Obtain zoning approval from the City of Dover Department of Planning and Zoning. The city issues a zoning official letter confirming the proposed use and site plan comply with Dover's zoning ordinance under 8 Del. C. § 700 et seq.
2. Submit a building permit application to Kent County Levy Court Office of Inspections and Enforcement via MGO, attaching the Dover zoning letter.
3. County plan review: IBC/IMC/IPC/IEC compliance, floodplain review, Lines/Grade Survey review (for applicable lots), environmental considerations.
4. Permit issuance by Kent County.
5. Construct per approved plans; schedule inspections through MGO.
6. Final inspection; Certificate of Occupancy.

Skipping the Dover zoning step and going straight to the County gets the application stalled at intake. The city zoning letter is the gating document.

Lines/Grade Surveys (effective Dec 1, 2025)

Kent County's new Lines/Grade Survey requirement applies to covered projects starting December 1, 2025:

• Lots less than 0.5 acres.
• Additions creating more than 500 sq ft of impervious area.

The survey documents site grades, setbacks, and lot lines in a way that supports drainage and compliance review. Factor survey cost and timeline into project planning for eligible projects. Verify the current rule language on the Kent County permits page for any subsequent amendments.

Floodplain permits — required for ANY work

For any property within a designated floodplain, Kent County requires a floodplain permit regardless of project size or scope. This applies to both new construction and alterations; even interior work in a floodplain-regulated structure may trigger the requirement. Check FEMA FIRM (Flood Insurance Rate Maps) and Kent County's floodplain overlay before assuming exemption.

Permit types

• Building permits (new construction, alteration, addition, demolition).
• Sewer permits (connection to public sewer or private septic).
• Floodplain permits (any work in designated floodplain).
• Subdivision / site plan approvals (via Dover city zoning first for in-city projects).
• Trade permits (electrical, plumbing, mechanical) — require DE state trade licensing.

MEP-specific considerations for Dover work

• Delaware state trade licensing via DPR for electrical, HVACR, and plumbing. See DE Contractor Licensing Navigator.
• Stormwater via DNREC or delegated Kent Conservation District. See DE Stormwater Navigator.
• Floodplain is non-trivial in Dover. Parts of the city sit in FEMA floodplains; factor floodplain permit into scope early.
• Historic properties in downtown Dover — State House area and other historic districts may add review layers. Coordinate with Dover Planning and Zoning early.

How Dover differs from Wilmington

• Two-agency vs. one-agency. Dover splits city zoning (Dover Planning) and county building enforcement (Kent County). Wilmington consolidates under Department of Land Use and Planning.
• MGO portal. Dover/Kent County uses My Government Online. Wilmington uses its own citizen self-service portal (Munis Self Service).
• Scale. Dover is smaller; direct communication with Planning and Zoning staff is routine. Wilmington's Department of Land Use and Planning handles a larger volume.
• Floodplain reach. Both DE cities have floodplain exposure, but Dover's Kent County floodplain rule ("required for ANY work") is notably broad in application.
• Lines/Grade Survey. Kent County's 2025-effective requirement is distinct; verify Wilmington's equivalent separately.

Common pitfalls

• Applying directly to Kent County without Dover zoning approval first.
• Missing floodplain overlay for an in-city property.
• Not budgeting for Lines/Grade Survey on covered lots.
• Not registering with MGO in advance of application submission.
• Using PA or MD trade licenses for DE work — need DE state trade license.

The practical workflow

1. Check zoning and floodplain status for the specific property.
2. Engage Dover Department of Planning and Zoning for zoning approval.
3. Obtain city zoning official letter.
4. Register in MGO if not already registered.
5. Submit building permit application through MGO to Kent County.
6. Address plan review comments (County + floodplain + Lines/Grade Survey as applicable).
7. Permit issuance; construct per approved plans.
8. Schedule inspections through MGO.
9. Final inspection; Certificate of Occupancy.

When to get direct help

Dover zoning questions: City of Dover Department of Planning and Zoning. Kent County permit / inspection questions: 302-744-2451 or MGO. Floodplain questions: Kent County permits team references FEMA FIRM maps. For state-level topics (trade licensing, stormwater, healthcare, prevailing wage), see our DE state navigators below.

Why we built this

Dover's two-agency permit structure catches out-of-state contractors and even some in-state contractors used to Wilmington's consolidated process. Applications hit Kent County without the prerequisite Dover zoning approval and bounce. This page surfaces the sequence so projects don't stall at intake.

Missing something? Email us.