Whether you need permits to build a koi pond depends on your local building codes and regulations. In many residential areas, small backyard ponds under a certain size may not require permits, especially if they are under a set depth, such as 24 inches. However, larger ponds, those with electrical components, or any pond that involves significant excavation might fall under local zoning, building, or safety regulations.
Some municipalities also have rules regarding fencing or child safety barriers if a pond is considered a potential hazard. It's important to check with your city or county building department before starting construction to avoid fines or being required to alter or remove the pond later. Getting the proper information early can help ensure your project complies with local laws and runs smoothly.