5.9 CONVERSION OF EXISTING DWELLING TO AN ACCESSORY BUILDING
Unofficial copy. It may be out of date. Not legal or zoning advice. Zoning rules change, and only the city or county can say for sure what is allowed on a property. Confirm with the city or county planning department before you buy, sign or build.
The official Castle Valley code is at https://castlevalleyutah.gov/documents/ordinances.php.
Text pulled 2026-10-19 from this source.
Tables (like use tables) may not copy cleanly, so check any table against the official code.
Confirm anything here with Castle Valley planning before you rely on it.
If a new Dwelling is to be constructed on a lot already containing an existing Dwelling, a legally
binding contract between the property owner and the Town must be signed and recorded guaranteeing that the existing Dwelling will be decommissioned thirty (30) days after occupancy of the new Dwelling, before a building permit for the new building containing a Dwelling can be obtained. Conditions shall be placed by the Planning and Land Use Commission through nonroutine decommissioning contracts to affect the decommissioning of the existing Dwelling and conversion to an Accessory Structure. These conditions may include: removal of some of the fixtures, facilities, and
plumbing that are part of what defines a Dwelling Unit in this land use ordinance such as the removal of circuits, or abandonment of both ends of the circuit, and gas line stubs used for cooking facilities, all the way to the attic or the crawl space; a statement of the intended new use; and guarantee that the building will never be used as a Dwelling regardless of length of time of occupancy. Decommissioning must occur within thirty (30) days after occupancy of the new Dwelling.
5.8 ALL PERMANENT BUILDINGS SHALL BE ON APPROVED FOUNDATIONS · 5.10 INTERNAL ACCESSORY DWELLING UNIT (IADU)