New Castle County, DE Right to Farm: Agricultural Zoning Protection (2026)
Key Facts
- Rural subdivision cap
- Up to 4 residential lots
- Reuse limit
- One use per parcel, ever
- Commercial stables
- Allowed by right on farmland
- Stable coverage cap
- 25% of site maximum
- Scope
- Unincorporated county only
Summary
New Castle County zoning shields farmland with a Suburban Reserve district and a one-time rural subdivision option, letting farm owners split off up to four house lots while keeping a residual parcel for continued farming.
A. Rural subdivision. This subdivision provides limited development opportunity in the Suburban Reserve if the landowner desires to continue agricultural operations, house family members, or raise income to supplement agricultural operations...The rural subdivision permits a landowner to subdivide a large tract up into four (4) lots; these lots are designated the "residential lots." The remaining parcel is designated the "residual lot."...used in part for access and as a reserve for future development.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 5).
Full Breakdown
New Castle County zoning creates a Suburban Reserve (SR) district specifically to keep large-lot farmland intact while allowing limited residential growth (Sec. 40.02.234). Article 24 lets an SR landowner split a farm into up to four residential lots while holding a residual parcel in reserve for continued farming, family housing, or supplemental farm income (Sec. 40.24.010): a parcel may use this process only once. Commercial stables are an accessory use allowed by right on agricultural land, capped at 25 percent site coverage (Sec. 40.03.302). These rules apply only in unincorporated New Castle County (Sec. 40.01.010); Wilmington and Newark zone under their own municipal codes.
Violations & Fines
Using the rural subdivision process twice on one parcel, or building stables past 25 percent site coverage, forces full major-subdivision review and can lead to permit denial by the Department of Land Use.
Frequently Asked Questions
Can I subdivide my farm into house lots without giving up farming?
Does this agricultural zoning protection apply in Wilmington or Newark?
Sources & Official References
Other rules in New Castle County
Compare New Castle County to another location·View the Delaware right to farm overview
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