You can build a squirrel house for free by recycling and collecting a few items you already have laying around. A squirrel house is a basic single entry feeder box where tree squirrels come to visit and have a snack. The dimensions of most squirrel houses are similar to that of the average rectangular shoebox. Put a squirrel house up on your property to invite squirrels to visit your yard without spending a cent.
Pull nails out of scrap wood until you have at lease a dozen straight nails that are longer than 2 inches.
Cut five identical planks that are each 8 inches long from some 1-inch thick nail-free scrap wood. Trim the five cut pieces so they have and equal width of 5 inches.
Align the edge of two of the planks to form a right angle. Drive two nails down through the corners at the edge to connect the boards.
Attach two more of the planks vertically next to the first to create a three-walled box with an open end.
Nail the final plank to the loose ends of the planks at the open end of the box. Make sure the edges are all lined up so the box is sturdy.
Drill a few small holes up through one of the narrow ends of the squirrel house. This allows for water drainage to keep squirrel food from rotting.
Forage for acorns, grains and nuts to add to the base of the squirrel house. The fully assembled squirrel house has one open side for access to the food stash, a front porch for squirrels to stand on and an overhang roof for shade and rain protection.
Spray clean squirrel feeders with a garden hose every few months to keep them in good condition. Allow them to dry and add new food.