The kennel should be large enough for your dog to lie down, stand, and turn around. It should be snug enough to retain body heat in colder weather.
Use non-toxic exterior grade plywood and chipboard. Consider flooring that provides extra padding and warmth.
To prevent moisture seepage, raise the kennel a few inches above the ground. You can use stilts, a hollow platform, or a concrete base.
Cut the sides and roof to fit your dimensions. Assemble the sides first, ensuring there are no rough edges or protruding nails.
Design your kennel for easy cleaning. A slight slope allows for easy drainage, while a detachable roof provides access for washing.
Don't forget to build a door or cut a door hole, so the dog can easily get in and out of the kennel.
Outdoor furniture cushions make great bedding. They're comfy, easy to clean, and more sturdy and weather resistant than indoor cushions.