If you are looking for maps in particular:
Another solution when the plan of the house is static can be using default buttons in Mendix and place these buttons on top of the image using CSS.
Then using CSS you can style these buttons to match the size of the room.
The buttons also should have an opacity of 0.
But when the plan of the house is changing or data driven, then this solution is not the best solution for you.
Cheers,
Jeffrey