The First Appellate District reversed an order and remanded. The court held that the California Environmental Quality Act’s regulatory categorical exemption for in-fill development did not apply to a proposed subdivision development located in an unincorporated area.

Developers Y.T. Wong and SMI Construction, Inc., applied to the County of Alameda to merge two parcels of real property that were located in an unincorporated area, to divide the resulting single parcel into twelve lots, and to develop each lot with a single-family home in conformity with the area’s existing zoning.