Adding a new garage to an existing house

How do I use this app to design a garage?

Hi,

I would start by just using the custom prompts and say something generic. Add a garage, and trying various generations and slightly different prompts. Once you get something in the area that you like, start getting more specific with prompts.
After a while you’ll be getting pretty close, just accept the image and then start iterating with further edits - mostly using custom prompts to make further changes.

If you post an image here we can help.