Wilmington, DE Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- R-1 district
- 30 ft minimum setback
- R-2, R-2-A
- 25 ft minimum setback
- R-3, R-4, R-5-B, R-5-C
- 15 ft minimum setback
- R-5-A
- 15 ft or 30 ft by use
- Porches/steps
- May project a few feet
Summary
Wilmington sets a minimum building setback from the street line for every residence district, running from 15 feet in the densest R-5 zones up to 30 feet in the low-density R-1 district.
Sec. 48-154. - Building setback lines. (a) Generally... each story or part of a building in a residence district shall be set back from the street line so as not to project beyond the building setback line established by the following table: District Minimum Building Setback (in feet) R-1 30; R-2, R-2-A 25; R-3, R-4, R-5-B, R-5-C 15; R-5-A: Semi-detached and row houses 15, All other uses 30; R-5-A-1 15
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 72).
Full Breakdown
City Code § 48-154 bars any story or part of a building in a residence district from projecting beyond the building setback line fixed for its zoning district: 30 feet in R-1, 25 feet in R-2/R-2-A, 15 feet in R-3, R-4, R-5-B and R-5-C, and either 15 or 30 feet in R-5-A depending on use. Uncovered steps and one-story porches may project a few feet past the line, and an existing-average-setback exception can let infill match a shorter block-front pattern. Corner-lot side setbacks are governed separately under § 48-156.
Violations & Fines
Building beyond the setback line without an approved exception or variance violates § 48-154; the city can withhold or revoke permits and require the non-compliant portion moved or removed, with variances handled by the zoning board of adjustment.
Frequently Asked Questions
How far back must a house sit from the street in Wilmington?
Can a porch extend past the setback line?
Sources & Official References
Other rules in Wilmington
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