Well, you can start by banning houses and cramming people into small apartments, which should be more efficient. Not everybody drives, but everybody needs a place to live and private houses are just abuse of the land.
Jokes aside, come see gas and parking prices in Europe.
I perfectly support house taxing being super-linear in the size of the house, if this is what you mean, in such a way that a decent house is as affordable as possible for everybody, and those who want very large houses recognize that they have an above-than-average share of a common resource, and therefore contribute to the common needs more than others.
That said, I believe that road space has different rules than housing space, so it is hard to compare them directly.
I am Italian and live in Belgium, in case this gives more strength to my argument. I also have a car and pay European prices for it. Of course, I try to use it as little as possible, which is good.
So if you have 7 people living in a 250m^2 house is that worse than 1 person living in a 100m^2 house? Should they pay much higher property taxes?
Probably not. FTR, I never said they should. I didn't propose any dependency on the number of residents, but this does not imply that I think there should be none. There are probably many other variables to take into account, and I didn't want to state a complete proposal. Just one of the many criteria.
After all, cars, especially when moving just one person, heavily overuse shared and scarce resources like space and environment. It's all too fair that they pay a higher share to public resources.
Maybe you will still use your car, accepting to pay a higher price for it, but other people will switch, making the world a better place also for you.