Permits for Ponds and Water Features

Do I need a permit to build a pond?

The honest answer is that it depends on where you live. Extension publications from Pennsylvania and Kansas, for example, describe different agencies and different triggers, which shows how much rules vary between states. Never assume that being on your own land means you can dig, dam or divert as you like.

Start by calling the local office that handles building and land use, and then ask them who else you should contact. A single phone call before you hire an excavator is far cheaper than removing a pond that was built without approval.

Be honest with yourself about scale. A small garden pond fed by a hose is a different thing from an excavated pond that holds runoff from several acres. The more water, the taller the embankment and the more downstream property it could affect, the more likely it is that an agency will want to see plans.

Which offices should I contact first?

Work through a short list and ask each office the same plain question: I plan to build a pond of about this size at this location, what do I need? Write down the name of the person, the date and what they said.

Different offices handle different pieces of the project, and some may point you to each other.

Write down the answers you get, including the name of the person and the date. Agencies sometimes give different answers to the same question, and a note of who said what helps you sort it out. If two offices disagree, ask each to put their position in an email.

• County or town zoning and building office
• Your state environmental or natural resources agency, including the dam safety program
• County conservation district or soil and water office
• Your local NRCS service center for design help
• Your state water resources or water rights office
• Utility locating service before any digging

What makes a pond more likely to need review?

Several features commonly raise the level of oversight, though the thresholds are set locally. These include building a dam or embankment of significant height, impounding a certain volume of water, damming a stream or creating a pond in or near a wetland, and sites where a failure could affect a road, a house or a neighbor downstream.

Ask each office whether your site has mapped wetlands, floodplains or a stream running through it. Your local conservation district can often help you look at maps before you commit to a location.

Pay attention to seasons as well. Some agencies restrict work in streams or wet areas during fish spawning or nesting periods, and a project that is approved in winter may not be allowed to start in spring. Ask about timing windows as part of the same call.

How does water law affect a farm pond?

Water rights are among the most state-specific topics in land ownership. In some places, collecting runoff or diverting a stream requires a right or a permit; in others, rules concern downstream flow or fish and wildlife. Do not rely on neighbors' stories, because the answer may differ for spring-fed, stream-fed and runoff-fed ponds.

Ask your state water resources office what applies to your source, and whether stocking fish or adding a spillway triggers anything separate.

If you plan to enroll in a cost-share or conservation program, ask the program office whether starting work before approval would make you ineligible. In many programs that is exactly what happens, so confirm before an excavator arrives.

What about decorative ponds, fountains and small water features?

Small garden ponds are usually treated differently from farm ponds, but local codes may still apply to depth, fencing or covers because standing water is a drowning risk, especially for children. Your town or county can tell you whether a barrier is required.

Electrical pumps and lighting near water should be installed by a licensed electrician where local rules require it. Do not improvise wiring around water.

What should I do once I have the answers?

Keep a project file with permit numbers, correspondence, site plans and photos taken before, during and after construction. If an agency gives advice by phone, follow up with an email so the advice is on record.

Consider asking NRCS or your conservation district whether technical help is available for design, since sizing the watershed, spillway and soil suitability matters as much as the permit. A pond that does not hold water is an expensive hole.

Finally, plan for maintenance. A pond needs a spillway kept clear, an embankment free of woody roots and burrowing animals, and regular checks after heavy rain. Ask the dam safety program or conservation district what owners are expected to do, because responsibility for the structure stays with you.

Last reviewed: November 12, 2026. Written by the Homestead & Small Farm Editorial Team. See our editorial policy.