When Can I Buy A House: In Monopoly

: There are only 32 houses in a standard set. If the Bank runs out, no more can be built until someone sells theirs or upgrades to a hotel. Timing Your Purchase

: None of the properties in that color group can be mortgaged.

: Some interpretations suggest you can buy houses even while the dice are in the air, but many players agree that once the dice land, the rent is fixed based on what was on the board at that exact moment.

You cannot simply buy a house because you have the cash; you must first satisfy these conditions: