What are the standards for a birdhouse? Some would say that the birdhouse should be decorative. Others would prefer it to be made up of either the metal or wood that would be a trusty shelter to the pets during the violent weather conditions. Well there could be a lot of criteria for different people who have the passion of taking care of birds for pets. However, the basic requirements would be for the birdhouse to be water-resistant, well-built, and durable. The birdhouse for your pets must be cool during the summer yet warm during the winter.