Plywood offers excellent stability and strength for drawer construction. Baltic birch plywood provides a premium appearance, while standard hardwood plywood offers good value. Solid wood works well but requires more attention to grain direction and seasonal movement.

The differences between a built-in closet and a walk-in aren’t that different from a built-in wardrobe and a walk-in closet. It’s fairly simple—a walk-in closet is a closet you can physically enter, stand in, and walk around in. A built-in (whether wardrobe or closet) is more akin to covered shelves installed into a recess in the wall. Another big difference is walk-in closets almost always have traditional full-size doors, while built-ins either have no doors or use sliding doors.

Bump-out additions can add some space to a closet without requiring any significant structural work. This entails pushing back the existing rear or side of the closet, simply moving the wall into either an adjacent room or unused space. For ground-floor closets, this could even be extended to the exterior of the home, but that has its own complications. Bump-outs are a good discussion to have with your contractor if you’re just looking to increase the space a little—not renovate the entire closet space.

You may need a building permit to add a closet, depending on the size and kind of work required to install it. The most likely scenario requiring a permit involves changing the structure of the house and performing electrical work for closet lighting. A permit can cost between $100 and $450. If you’re installing a smaller reach-in closet, a permit may not be required, but always check with your local municipality and consult a closet designer or builder.