Minimum size inside the closet (depth) should be 24" sheetrock to sheetrock.
This way you can install an 11' shelf and pole. And the clothes hangers will fit inside the closet.

Hello Firsthouse, and thanks for your email.

Talk with the Building Department of your City and find out if there are any "minimum" size requirements for a closet because there may actually be a minimum. As Bill and Marilyn noted below, however, closets should be functional and the smallest functional closets (hallway closets, for example) I've seen have an interior footprint of 5 feet wide by 4 feet deep. Shallower or narrower than this, and the space becomes unusable.

As Marilyn noted, one of the first things noticed by a buyer is the size of the closet in the bedroom. Buyers tend to like larger closets with an interior space of between 7-10 feet wide by 4 feet deep, and plenty of room and shelving above the garment pole to store personal items. Closets that are smaller tend to be a "negative" feature of a home. So if you are planning to move the closet to get better use of the bedroom space, the rule of thumb is typically not to replace it with a closet that is smaller than the one you're removing.

Good luck in your renovation!

Sincerely,
Grace Morioka, SRES, e-Pro
Area Pro Realty

First,

We are not aware a minimum dimension for a closet in a bedroom. It would be sensible to make it large enough to be functional.

Good luck

I don't believe there's any code on it, but keep in mind if it's not large enough to be useful future buyers will consider that. Even if it's technically a bedroom, if it's not very usable then that will count against your house when being compared to others. I'm not in your area, but I can tell you in the markets I have worked in - large closets are a selling feature!