[header] How to build an iguana cage [title] Research the iguana lifestyle. [step] The environment an animal needs to thrive as a pet depends on several factors, including : [substeps] The size of the adult animal. Most people purchase a baby iguana when it is only a few inches long, but adult iguanas can reach 20 pounds and 5-7 feet from the tip of their tail to their nose. 
They live to be about 20 years old and reach their full size at about 2-3 years. It is crucial that iguana habitats are built to accommodate this size.