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Hampton adopts ADU zoning changes allowing one accessory unit per lot with size and occupancy limits
Summary
Council adopted four zoning ordinance amendments (25-0018, 25-0019, 25-0268, 25-0269) to allow one accessory dwelling unit (ADU) per lot, cap new ADUs at 800 sq ft, require owner-occupancy and generally prohibit new ADUs as short-term rentals; effective date set for Dec. 31, 2025.
The Hampton City Council unanimously adopted a package of zoning ordinance amendments that create standards for accessory dwelling units (ADUs) in one- and two-family residential districts, officials said.
Staff presentations explained that the amendments add a new section (1‑37) and revise chapters 1, 2, 4 and 11 to define ADUs, set development standards and address parking. Monica Mayhar, the city’s Community Engagement Manager, said staff reached over 350 survey respondents and that about 48% of respondents indicated interest in adding an ADU to their property.
Planner Quinn Heinrich described the ordinance specifics: staff recommends allowing only one ADU per lot, limiting ADUs to 800 square feet (or 50% of the principal dwelling’s area, whichever is smaller), capping height at 16 feet or 1.5 stories (and not taller than the principal dwelling), and requiring owner-occupancy so owners cannot rent both the principal dwelling and ADU simultaneously. Heinrich said the planning commission suggested increasing a setback for detached ADUs from 3 feet to 5 feet and that ADUs will not be allowed to be new short-term rentals.
Heinrich also described parking and safety requirements: generally no additional off-street parking would be required for an ADU unless the block prohibits on-street parking, and principal access to ADUs must provide a clear path to the right-of-way for first-responder access. Enforcement will proceed through a zoning administrator permit (ZAP), building permits and inspections; violations could result in notices, court orders or fines.
A councilmember moved to adopt the four ordinance amendments as revised and recommended by the planning commission, setting an effective date of Dec. 31, 2025. Council vote recorded all ayes and the motion carried.
