The initial cost to put in a pond is just the beginning. Maintenance has to be factored in, along with all the extras—plants, fish, stones, streams, waterfalls, fountains, even fences (a legal requirement in some places for ponds over a certain depth). In addition, a pond is a permanent feature in the landscape, so it must be the right proportion and style to fit in with your house and the surrounding property. A landscaping professional or expert from the garden center can help with design and siting. Just make sure to choose someone who has experience installing ponds and a good track record.