Cedar is easy to work with and it is durable and reliable and can be work for long periods of time without any maintenance.
Other types of wood that are used in building dog houses include pine and hemlock though they are less common. One reason is because they lack the insect and decay resistance compared to cedar wood. That is also why they are seldom used as the base structure of your dog house as they decay and rot faster especially when they come into contact with the ground.
If you are building your own dog house, beware of using pressure-treated wood. This is because although they are resistant to decay and insects, they contain harmful chemicals that could pose a danger to your dog.
Most older pressure treated wood uses chromated copper arsenate which can be deadly to animals. Nevertheless, over the past few years, other chemicals have been used to create pressure treated wood and it is safer.
Wood is also better than plastic in building dog houses because they stay much warmer during the winter. Wood also helps to dissipate heat naturally during the summer months.
Wood is also easier to work with compared to plastic. You only need a saw and a hammer to build your own dog house. If you are eco-conscious, then building wooden dog houses is also more environmentally friendly and can easily be recycled for other purposes. It is also cheaper than plastic.