New Castle County, DE Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- NC10 front/street yard
- 25 ft minimum
- NC10 side yard
- 8 ft minimum
- NC10 rear yard
- 30 ft (20 ft on corner lots)
- Suburban Reserve yards
- 50 ft front, side, rear
- Side-entry garage
- 30 ft side setback
Summary
New Castle County's Unified Development Code sets minimum front, side, and rear yard setbacks for every zoning district in Table 40.04.110, ranging from 50-foot yards in Suburban Reserve to single-digit side yards in dense Traditional Neighborhood districts.
Sec. 40.04.110. - District and bulk standards. This Section contains the basic district standards applicable to all uses. Table 40.04.110 contains intensity, lot, bulk and exterior storage standards. ... NC10 0.14 2.65 3.09 na. na. P 10,000 sf. 10,000 sf. 80 25 8 30* na. na. 35 na. * 20 feet for corner lot
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
Setback minimums vary by zoning district under Table 40.04.110's Front and Street Yards, Side Yard, and Rear Yard columns. In the NC10 Neighborhood Conservation district (10,000-square-foot lots), the minimum front/street yard is 25 feet, side yard 8 feet, and rear yard 30 feet, reduced to 20 feet on corner lots. Suburban Reserve single-family lots require 50-foot yards on every side, while Traditional Neighborhood village houses need only a 5-foot side yard on a 12-foot build-to line. A residential side-entry garage gets a 30-foot side setback under Section 40.04.110.E.4. This table governs unincorporated New Castle County; Wilmington and Newark administer their own zoning codes and setbacks, not this one.
Violations & Fines
Encroaching into a required yard is a zoning violation reviewed by the Department of Land Use; expect permit denial, a stop-work order, or a required removal or relocation of the offending structure.
Frequently Asked Questions
Do these setbacks apply inside Wilmington or Newark?
Are setbacks the same in every zoning district?
Sources & Official References
Other rules in New Castle County
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