Delaware's County-Based Zoning: Three County Systems + Home Rule Municipalities

The statutory setup

• 9 Del. C. Ch. 26 Subchapter I — grants New Castle, Kent, and Sussex County Councils the power to regulate land use in unincorporated areas. Basic authority: divide into zones, regulate location/height/bulk/size/use of buildings and structures, regulate land uses.
• 9 Del. C. Ch. 26 requirements — regulations uniform within a district, may differ between districts; procedures for zoning plans, regulations, enforcement, and nonconforming uses.
• Municipal authority — each incorporated municipality operates under a home rule charter granted by Title 22 of the Delaware Code with specific enabling authority. Municipal zoning is independent of county zoning within municipal boundaries.

Primary sources: delcode.delaware.gov (Title 9 Chapter 26); individual county and municipal online codes.

New Castle County

• Administration: NCC Department of Land Use — reviews development plans, rezoning applications, site plan approvals.
• Regulations: Unified Development Code (UDC), Chapter 40 of the New Castle County Code. Incorporates Comprehensive Development Plan standards within the same codified structure — a consolidated approach that's relatively advanced for a county code.
• Process: Major land development plans + rezonings reviewed for UDC compliance; County Council approves zoning changes on Department of Land Use recommendation. Variance and special-use processes through specific application channels.
• Character: Most populous DE county; includes Wilmington's suburban ring. Development plan process is mature and well-documented.

Kent County

• Administration: Department of Planning Services, Planning Division — handles zoning information, setback requirements, land use applications.
• Regulations: Specific chapters of the Kent County Code (including Chapters 101, 171, 187, 188, 205) cover zoning and subdivision. Not consolidated into a single UDC like NCC.
• Process: Regional Planning Commission reviews site plans, rezonings, conditional uses, subdivision plans, and recommends to Levy Court (county legislative body). Board of Adjustment hears variance applications. Levy Court holds public hearings and decides on ordinance/map amendments and conditional uses.
• Character: Agricultural/rural mix with Dover as the county seat but a separate jurisdiction. Significant coverage of undeveloped land.

Sussex County

• Administration: Planning & Zoning Office — supports the Planning & Zoning Commission and Board of Adjustment in unincorporated areas.
• Regulations: Sussex County Code, including Zoning Code and Subdivision Code.
• Process: Planning & Zoning Commission (5 members) considers change-of-zone, conditional use, and subdivision applications; advisory on rezonings and conditional uses; authority to grant or deny subdivision applications. County Council makes final decisions on conditional uses and rezonings. Board of Adjustment hears variance and special-use-exception requests.
• Character: Beach-tourism + agricultural. Growth pressure high in the coastal corridor. Interacts with Delaware Coastal Zone Act (see our DE Coastal Zone Act essay) but local zoning is the controlling tool for most Sussex commercial work.

Incorporated municipalities — home rule

Major incorporated cities and towns operate their own zoning independent of county authority:

Wilmington

• Department of Land Use and Planning administers the City Zoning Ordinance.
• Regulations in Chapter 48 of the City Code + Wilmington 2028 Comprehensive Plan.
• City Planning Commission (CPC), Zoning Board of Adjustment (ZBA), Design Review & Preservation Commission (DRPC).
• See our Wilmington Multi-Department essay for the broader city permit context.

Dover

• Department of Planning and Inspections maintains zoning maps.
• Zoning in Appendix B of the City of Dover Code of Ordinances; Land Subdivision in Appendix A.
• All land within city limits carries a zoning district classification.
• See our Dover Dual City-County essay for the city-county coordination model.

Newark

• Planning and Development Department handles zoning.
• Zoning Code in Chapter 32 of the City Code + Comprehensive Development Plan.
• Planning Commission considers development proposals.

Other incorporated towns (Lewes, Rehoboth Beach, Smyrna, Georgetown, Seaford, Milford, Middletown, etc.) each operate their own zoning systems with significant variation. Coastal towns in particular have layered zoning complexity tied to tourism-oriented land use and beach/dune preservation interests.

What contractors/developers should know

• Jurisdictional determination is step one. Is the parcel in an incorporated municipality, or in unincorporated county territory? County or municipal rules apply accordingly.
• Each system is self-contained. NCC UDC, Kent Code, Sussex Code, Wilmington Chapter 48, Dover Appendix B — each has its own vocabulary and process.
• Levy Court vs County Council. Kent County's legislative body is the Levy Court; NCC and Sussex use County Council. Same function, different name.
• Annexation changes regulatory regime. A parcel annexed from county into a municipality moves under the municipality's zoning.
• Subdivision authority. Sussex P&Z Commission has direct subdivision-application decision authority; some other jurisdictions use advisory-only commissions with council final action.
• Board of Adjustment differences. Variance standards and procedures differ by jurisdiction.

How DE's setup compares to the neighbors

• Pennsylvania. MPC provides uniform procedural framework across ~2,560 municipalities (excl. Philadelphia and Pittsburgh). Procedures are consistent; ordinances vary. See our PA MPC essay.
• New Jersey. MLUL provides statewide framework across all municipalities. Planning Board vs ZBA split with c/d variance types. See our NJ MLUL essay.
• Maryland. Land Use Article with county-driven zoning. More aligned with DE in that county authority is central, but MD statute provides more uniform framework.
• Virginia. Code of Virginia Title 15.2 Chapter 22 — statewide enabling act.
• Delaware. No state enabling act. 9 Del. C. Ch. 26 grants county authority; home rule charters grant municipal authority. Least-unified framework in the region.

This puts a premium on jurisdiction-specific familiarity when working across DE.

Practical project flow considerations

• Pre-application zoning confirmation at the jurisdiction's planning office.
• Rezoning requires substantial advance planning; rezoning timelines can be 6-12+ months in some jurisdictions.
• Conditional use / special use exception vs variance vs permitted use — terminology varies by jurisdiction.
• Subdivision review timelines and thresholds differ.
• Historic preservation overlays exist in Wilmington (DRPC), certain Sussex coastal towns, and as recognized districts in each county's framework.
• Coordinate zoning review with stormwater/Conservation District review (see our DE Conservation District essay) and the broader permit process.

What to do with this

If you're acquiring DE land: pull the zoning designation from the appropriate jurisdiction before committing. Don't assume.

If you're developing across multiple DE counties/cities: budget learning curve for each jurisdiction's system. They don't transfer.

If you're used to PA MPC or NJ MLUL: the absence of a state enabling framework in DE means less procedural uniformity. Each jurisdiction's code is authoritative for its territory.

If you're scoping a rezoning: engage the planning department early. Rezoning processes are jurisdiction-specific and can have significant timelines.

For broader DE regulatory context, see our Delaware Contractor Licensing Navigator and Delaware Stormwater Navigator.

About The Hive

The Hive builds tools and publishes essays for working construction and MEP professionals in the Delaware Valley and Mid-Atlantic. Primary-source-grounded, practitioner-voiced, free to use.