What you can set yourself is the zoom factor of the image. So, if you don’t want the whole image to be bigger, but just want to show the house bigger, you can configure this on the page where you generate the PDF.
In addition to the module display, you will also find the “Zoom” setting, where you can choose between “minimum”, “normal”, and “maximum”. Accordingly, the house with the modules is displayed larger or smaller. We can also adjust this for you by default if you do not want to make the change when generating each PDF, so that the zoom is always set to “maximum”, for example.