Solid Cedar Dog House. Treat your best friend to one of our Top Quality Cedar Dog Houses. These Cedar Dog Houses are made by skilled US craftsmen and built with the highest grade materials to last for years. Large Cedar Dog House Size 4 for Medium/Large Breeds Large House Dimensions- External: 30L x 36W x 33H inches- Internal: 27H x 31W inches- Door Opening: 17 1/4H x 12W inches