Building Setbacks & Zoning in Wilmington, DE (2026)
3 verified building setbacks & zoning rules for Wilmington, Delaware, sourced directly from the municipal code and official government pages.
Verified from official government sources
Setback Rules
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.
Wilmington Yard Setback Minimums by Zone
Some RestrictionsWilmington City Code § 48-154
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-...
Structure Height Limits
Wilmington's building code caps protected wood-frame (Type 5A) one- and two-family homes, semi-detached dwellings, and rowhouses at three stories: taller wood-frame construction isn't permitted under the city's amended IBC.
Wilmington 3-Story Wood-Frame Height Cap
Some RestrictionsWilmington City Code § 4-27 (IBC § 504.4.1.1)
Section 504.4.1.1. One-family detached dwellings and one-family semi-detached dwellings, not exceeding three stories in height, shall be erected of protected frame construction (Type 5A). All structural elements shall meet the requirements of strength and rigidity as specified in chapter 16 and 23, and construction as listed in Tables 601 and 602 of the International Building Code. In one-famil...
Lot Coverage Limits
Wilmington caps building coverage at 60 percent of lot area in the W-1, W-2, and W-3 waterfront districts, and at 40 to 50 percent in the W-4 district depending on building type.
Wilmington Waterfront District Lot Coverage Limits
Some RestrictionsWilmington City Code § 48-356
In waterfront zoning districts, the lot area occupied by all buildings on a parcel in relation to the total parcel area shall not exceed the ratios set forth below: District Building Coverage Ratio W-1, W-2 0.60 W-3 0.60 W-4 Rowhouses 0.40 Garden apartments 0.40 Walk-up apartments 0.50 Elevator apartments 0.50 All other uses 0.50 (Code 1968, § 48-40.1(j)(4); Ord. No. 24-004, ...
Looking for New Castle County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Wilmington city rules.
Building Setbacks & Zoning in New Castle County →