There is some good advice above here.

I have my male, Colombian, locality in a 48" x 30" x 20". I believe boa constrictors will remain semi arboreal throughout their lives, and I prefer to see them use that characteristic in my situation. I'm not a breeder, nor do I have plans to breed any of the animals I own.

I like display caging for my own viewing purposes.

I really, and this is just my opinion, don't like cages that don't offer a semi arboreal species the chance to get off the ground. However, if you do not provide the space in the cage, get the animal out and let it climb a few times a week. You'd be amazed at the muscle development and tight, lateral compression their bodies attain because of the exercise they get by climbing. I'm speaking of BC's when I mention "lateral compression," but ALL semi arboreal species will "muscle up" through climbing.

My male was a few months shy of the 1 year mark when I bought him and he went directly into a Pro-Line 48" x 24" x 14" cage. He is now in the larger cage and he'll live his life out there unless he attains an extraordinary length and weight in the coming years which is very doubtful.

WHEN???

Well, that all depends on the animal. You obviously want to mimic what the breeder was doing before you took possession of the snake for a while. Transportation, new environment, possibly different climate and pressure can take a toll and cause some stress.

An established, feeding, eliminating, and shedding animal should have a decent chance at successfully moving into a larger enclosure.

Be prepared to change things back or modify the new cage if things don't look right to you.

A young BC using the perches and climbing options.




The new boa constrictor cage is on the bottom. He, the snake, is 5' 3" at about 2.5 years old. He uses the perches constantly.

There is a young coastal carpet python in the top cage that will go into a cage like Serpent Merchant mentioned, and the royal python will take the top cage here when the time comes.



I checked with the BC breeder about the cage size, and his thoughts on moving the boa into the first cage before purchase. I also prepared the cage with a lot of clutter for the first few months and didn't handle the animal often until I made sure he was functioning properly.