New Castle County, DE Building Setbacks & Zoning: Structure Height Limits (2026)
Key Facts
- Suburban/SE/SR single-family cap
- 40 feet
- NC10/NC6.5/NC5 districts cap
- 35 feet
- Attached housing (NCap) max
- 60 feet
- Extra-height setback trigger
- over 50 ft within 100 ft of home
- Exempt rooftop features
- spires, chimneys, antennas, silos, tanks
Summary
New Castle County's Unified Development Code sets building height by zoning district in Table 40.04.110: most single-family districts cap homes at 35 to 40 feet, with taller buildings near existing homes triggering matching setback increases.
Maximum building height. If there are single-family detached or single-family attached dwellings within one hundred (100) feet of a property line of the parcel to be developed with a building over fifty (50) feet, the required front, street, side or rear yards adjacent to those dwellings shall be at a minimum equal to the height of the proposed building.
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
Table 40.04.110 sets the maximum building height for each zoning district. Single-family homes in the Suburban (S), Suburban Estate (SE) and Suburban Reserve (SR) districts, and in most Neighborhood Conservation (NC) districts including NC40, NC21, NC15 and NC2a, top out at 40 feet; the smaller-lot NC10, NC6.5 and NC5 districts cap at 35 feet, while attached-housing NCth, NCga and NCap districts allow 40, 45 and 60 feet. Under Sec. 40.04.110(C), any building over 50 feet within 100 feet of an existing single-family home must set back from that home by a distance equal to its own height. Spires, chimneys, antennas, silos, water tanks and elevator enclosures are exempt from the cap under Sec. 40.04.110(E)(3).
Violations & Fines
The Department of Land Use reviews building height against Table 40.04.110 before issuing a zoning permit or certificate of occupancy; construction exceeding the district cap or required setback is denied approval and subject to correction.
Frequently Asked Questions
What is the height limit for a house in New Castle County?
Can a builder go over 50 feet near my house?
Does this height table apply in Wilmington or Newark?
Sources & Official References
Other rules in New Castle County
Compare New Castle County to another location·View the Delaware building setbacks & zoning overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.