Choose the right location for your pond. Find a section of flat land so the water in your pond does not drain out.
Call your local county or city and ask what the freeze line is (for example, 3 feet beneath surface dirt). Digging deeper than the freeze line will prevent your pond from freezing into a solid block of ice in winter.
Mark the shape of your pond with spray paint.
Starting from the center and working outward, dig your pond. Make the pond at least 1 to 2 feet deeper than the freeze line, especially if you plan to stock your pond with fish.
Remove all debris from the bottom of the pond.
Spread a vinyl liner or pond liner to the bottom, avoiding wrinkles and folds. Cut any excess with a utility knife.
Add water or wait for rainfall. Add dechlorinator if you plan to stock your pond with fish.