New Castle County, DE Home Business: Zoning & Home Occupation Permits (2026)
Key Facts
- Floor area cap
- 25% of dwelling's gross floor area
- Non-resident employees
- Up to 2 full-time with signed agreement
- Signage/outdoor storage
- Not permitted for the occupation
- Penalty
- Up to $100 per day, per violation
- Scope
- Applies in unincorporated New Castle County
Summary
New Castle County allows home occupations in unincorporated areas only if the business stays invisible from outside, caps at 25% of dwelling floor area, and bars outside employees beyond family without a county agreement.
Any home occupation as defined in Section 40.33.221.B which is conducted in a manner such that the dwelling housing the occupation is indistinguishable from dwellings with no business use ... is permitted as an accessory residential home use... No home occupation shall be conducted outside the dwelling unit. The total area used to accommodate the home occupation shall not exceed twenty-five (25) percent of the total gross floor area (GFA) of the principal residential dwelling.
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
Under UDC Section 40.03.420.A, a home occupation is permitted as an accessory residential use only if the dwelling stays indistinguishable from a home with no business use. The activity can't be conducted outside the dwelling and can't exceed 25% of the principal dwelling's gross floor area, with no structural alterations for the business. No outdoor storage, display, or signage advertising the occupation is allowed, and the owner-operator generally can't employ non-residents unless they file a Conditional Home Occupation Agreement with the County Code Enforcement Office, capping additional staff at two full-time or four part-time. This UDC chapter governs unincorporated New Castle County; Wilmington and Newark enforce their own separate municipal zoning codes.
Violations & Fines
Exceeding the 25% floor-area cap, conducting work outside the dwelling, posting signage, or using non-resident employees without a filed agreement is a violation punishable by up to $100 per day, each day a separate offense.
Frequently Asked Questions
Can I run a business from my New Castle County home?
Does this zoning rule apply inside Wilmington or Newark?
Sources & Official References
Other rules in New Castle County
How New Castle County compares: Easiest Cities to Run a Home Business·Compare New Castle County to another location·View the Delaware home business overview
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