A. All existing platted subdivision lots that do not meet the minimum lot area and dimension standards of the district within which they are located are hereby deemed nonconforming lots. Any lot that was legally created prior to the effective date of this title may be used in conformance with the uses permitted by the zoning district within which it is located, provided that all yard and setback requirements are met. If lot area is deficient in a residential zone by no more than fifty percent (50%), any such non-conforming lot may be used only for construction of a detached single-family dwelling. Undeveloped, nonconforming lots of at least fifty percent (50%) of the minimum required lot area may be used and have a single-family structure erected upon them.
B. Notwithstanding the foregoing, if any such lot is contiguous to one or more lots of common ownership and any combination of such lots will meet the area or dimension standards of this title, such lots shall be considered to be an undivided parcel for the purposes of this title. Accordingly, the separate lots shall be treated as a single parcel concerning the issuance of a building permit for any residential construction on the lot, or contiguous commonly owned lots where this condition exists. No nonconforming or conforming lot shall be reduced in area or dimensions if such reduction would result in a greater degree of nonconformity. In the least dense residential district in Idaho City, any lot with an area less than the minimum required for the least dense residential district may only be developed to the minimum residential use allowed in the zone. Any lot in any residential district that has an area less than the minimum square footage desired, but at least fifty percent (50%) of the minimum area, unless it adjoins one or more substandard lots held in common ownership, may only be developed with a single-family dwelling unit. (Ord. 352, 4-25-2018)