Determine in which part of the house the squirrel is nesting by listening for the sounds of scampering, particularly during the midmorning when squirrels are most active.
Move pets and family members to a different area of the house until you get the squirrel out. Close room doors and section off areas such as staircases to prevent the squirrel from roaming.
Close all but one window or door leading to the outside from within the squirrel's nesting area. This gives it an escape route. Remove the screen from the window and open the blinds or curtains – make the exit easy to access.
Cover other light sources with curtains, blankets, sheets or newspapers so the squirrel will be attracted to the open window or door. Stay out of the room until the squirrel exits; squirrels are intimidated by humans and might not leave the nest in your presence.
Look for nests in insulation and small openings or cracks that lead to the outside.
Install a one-way door that allows squirrels to get out of the attic but prevents them from re-entering.
Play a loud radio in the attic or bang on a pan nearby during midmorning hours to scare the squirrel toward the exit you have created.
Open the chimney flu.
Tie knots about 1 foot apart down the length of an old sheet or rope. Tie an object, like a hammer, to the end of the sheet for weight. Tie the top of the sheet or rope around the top of the chimney.
Lower the rope into the chimney so the squirrel can reach it and climb out.
Place a cap on the chimney flu to prevent a squirrel from re-entering the chimney.