How to Find a Surveyor's Boundary Pin

Their removal is a crime, but that doesn't mean they can't be covered with dirt by Mother Nature -- or a previous owner who didn't want to ding his new lawnmower blades. They are boundary pins, driven into the ground at the corners of your lot by a licensed surveyor. If it matters to you, the surveyor's name and license number is either embossed onto a colorful plastic cap atop the pin or stamped into its side. The pins mark the ends of each side of the property, so you can tell for certain where your property begins and that of your next-door neighbor ends.

TL;DR (Too Long; Didn't Read)

You can manually search the boundaries of your property for the pins or use a metal detector to find them.

Search the Property

Take the copy of the boundary or plat survey of your property for a stroll around the grounds. When you get to the corners of your lot, keep a sharp eye out for half-inch-wide iron pins sticking up out of the ground.

Sweep a metal detector back and forth about 2 inches above the ground at the corner of the property if you don't see the boundary pin sticking up. When you get a "hit" with the metal detector, stick a surveyor's colored flag in the ground to mark the place where the signal is strongest.

Remove the Dirt

Use a garden trowel to dig out the dirt from the top and sides of the flag. Once you find a boundary pin, don't pull it out of the ground, no matter how far down it is. Use duct tape to connect the wire end of a surveyor's colored flag to the top of the pin. Use the trowel to fill in the hole and rebury the pin; the flag should extend a few inches above ground level.

If the flag should be damaged, replacement surveyor's flags are available at stores that carry engineering supplies. The duct tape only holds the flag to the pin long enough for you to rebury the pin and the bottom of the surveyor's flag. Once the pin's reburied, the dirt holds the flag in place. Once you rebury a boundary pin, don't let it be uncovered by anyone except a registered professional land surveyor.

Other Surveying Considerations

If you inherited the land, the county or parish tax assessor has a copy of the last survey done on the property. If you live in a state that didn't always require a recorded survey – California didn't demand them until 1972 – the description on the deed may be the only existing description.

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