The ideal position to install a birdhouse in your garden is a quiet and sheltered spot that is safe from any predator. It is recommended that you install it 5 to 10 feet above the ground and fix it to a tree trunk, post, or even a wall. It should not face any wind and should be in a spot that receives partial sunlight. It should not be in a spot where there is a lot of human or pet traffic. It should also not be in a spot that is unstable to prevent it from swaying in the wind.