Oyster Bay, NY Accessory Structures: ADU Owner Occupancy (2026)

' The requirement means an investor or absentee owner cannot create a parent-child accessory unit and rent out both the main house and the accessory unit to others; one of the two units must be the owner's own primary home. 9, Nassau County Department of Health approval must be obtained before or as a condition of that permit unless the property already connects to public sewerage. 8 further directs the reviewing agency, when deciding whether to grant the permit, to weigh the character of the area, including exterior appearance, how many parent-child residences already exist nearby relative to one-family homes, and traffic and parking conditions.

Because the owner-occupancy condition attaches to the special use permit itself, a subsequent sale of the property to a new owner who does not intend to live on-site can jeopardize the permit's continued validity, since continued compliance with permit conditions is required to keep a certificate of occupancy in effect under § 246-6's general conformance rule.