Reports :: Multiple Lists On A Single Subject

I have been asked to make a report from my database listing property sites and listed things found with them. Ex. a property might have 3 houses and 2 cars on it. Whenever I make a report the best I can make are groups that look like:

Property 1
House A
Car a
Car b
Car c
House B
Car a
Car b
Car c

I need something that could group car and houses directly to property 1 rather than cars grouped to houses grouped to property.

Ex.
Property 1
House A
House B
Car a
Car b
Car c