Accessory Structures in Wilmington, DE (2026)
5 verified accessory structures rules for Wilmington, Delaware, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Accessory dwelling units (ADUs) in Wilmington are subject to zoning review under Ch. 48. The city has been updating rules to allow more infill housing, but ADUs require permits and must meet zoning standards.
Wilmington ADU & Accessory Dwelling Regulations
Some RestrictionsShed Rules
Sheds in Wilmington require permits if they exceed a certain square footage. Small utility sheds may be exempt. Sheds must comply with rear/side yard setbacks.
Wilmington Shed & Outbuilding Rules
Few RestrictionsGarage Conversions
Converting a garage to living space in Wilmington requires building and possibly zoning permits. The conversion must meet all habitability and building code standards.
Wilmington Garage Conversion Rules
Some RestrictionsCarport Rules
Carports in Wilmington are accessory structures regulated under City Code Chapter 48 (Zoning) and require a building permit from the Department of Licenses and Inspections. They must meet the underlying residential district setbacks and lot-coverage limits, and open sides may be required for the structure to be classified as a carport rather than a garage.
Carport Rules in Wilmington
Some RestrictionsTiny Homes
Delaware does not preempt local tiny-home rules, and Wilmington's City Code Chapter 48 (Zoning) treats dwellings under the standard residential district bulk regulations - there is no separate 'tiny home' use category. Any permanent dwelling must meet the minimum lot, yard, height, and floor-area standards of its zoning district and comply with the Delaware State Building Code (ICC IRC family).
Tiny Home Rules in Wilmington
Some RestrictionsLooking for New Castle County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Wilmington city rules.
Accessory Structures in New Castle County →