As an admin, you can add a new area in Housebuilder Pro by clicking on the "Admin" tab, then clicking "Areas". Doing so will bring you to the admin page that shows all current areas configured within Housebuilder Pro. From here, you can click the blue "+ Add new area" link to create a new area.
You’ll be taken to a new page with the option to upload an image. You can drag an image to upload here in either a .JPG or .PNG format. Alternatively, clicking the grey box will open your file explorer and allow you to browse your files to upload a photo. You also have a blank box to fill in your area names, such as the living room or kitchen.