you can utilize an existing door frame and have a bookcase built into it, using invisible hinges to keep the door hidden on either side,' says Emma Deterding, founder and creative director ...

We may receive a commission on purchases made from links. Buildings with hidden spaces have long been a subject of public ...

As the name suggests, while it operates as a standard swing door, its frame installation is significantly different—either entirely hidden within the wall finish or installed flush with the wall ...