Shed permit rules in New Castle County, DE — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Sheds and outbuildings in New Castle County are accessory uses under UDC Section 40.03.410. They cannot be used for habitation and must meet setback requirements. Permits are required for larger structures.
New Castle County's UDC §40.03.410 classifies sheds, garages, and outbuildings as accessory uses. They may not be used for habitation and must be placed in rear or side yards behind the principal structure. Setbacks from property lines apply. The Dept. of Land Use's permit requirements apply to larger accessory structures. Small utility sheds (under 120–200 sq. ft.) may be exempt. On lots of 2 acres or more, one freestanding accessory structure may be located in front of the principal building (but not in the front setback).
Sheds in front yards, violating setbacks, or used for habitation violate Ch. 40.
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See how New Castle County's shed rules rules stack up against other locations.
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