Alterations and additions to existing residential structures
Decks over 30" high
Changing type of heating/cooling system
Adding windows or doors or changing them to a different size
Swimming pools, hot tubs, and spas Swimming Pools and Hot Tubs (Appendix G) All swimming pools that hold 24" of water require both a Zoning and Building Permit. And pools with less than 48" sides require a fence. All spas require permits also. This information applies to in-ground, above ground and storable pools.