In that case, probably not.
For 3 hens, a prefab is probably fine. This is just a cautionary tale. Rather than read what they say the coop will hold, get the actual inside floor measurements and use the rule of thumb of 4 sq. ft. per bird for interior space. 3 birds therefor need 12 sq. ft. of floor space. The minimum would be 4'X3' interior dimensions or some combination thereof.
IMO, manufacturers use the square footage allowed for caged layer hens in their calculations. Even high end companies do the same.
I'm an organizer of a local 700+ member backyard chicken group that covers well over 150 municipalities and unincorporated areas. Each of those cities have ordinances that range from no chickens allowed to unlimited and roosters too. The cities are tiny and mashed all together to where the end result is a person may only be able to have 3 chickens, their neighbor across the street can have unlimited numbers and down the street they may be illegal. This situation is common around hers.
So we have perhaps close to half our members that are limited to 3, 4 or 5 chickens and many of them have bought prefab coops and they seem happy with them.
Another option is to go to the learning center tab at the top of the page, click on coops and then small coops.
Many have complete plans, schematics, bill of materials, etc.. Find one you like, go to craigslist and hire a carpenter to replicate the coop of your dreams. It probably won't cost more than a pre-fab and you may end up with a better product.
Edited by ChickenCanoe - 12/1/15 at 12:22am