A person who breaks into houses is commonly referred to as a "burglary" or "burglar." Burglary involves unlawfully entering a building with the intent to commit a crime, typically theft. The term can also encompass individuals who commit similar acts in other types of properties.
burgler.
It can be called a salesperson.
People who sell houses are called realtors. In UK they are called real estate agents.Icepenguins
The person who breaks into a computer system should be called a hacker. If he does with permission, he's a blackhat hacker, in contrary is a whitehat. The person who breaks into a software is a cracker.
a robber
a robber
When a person breaks out of jail, it is generally referred to as an "escape" or "prison break." It is a criminal offense and can lead to additional charges and consequences.
If a person breaks a valid contact or does not live up to the end of the bargain, then it is called Breach of Contract.
They are called houses.
A person who designs houses is often called an architect.
houses are called houses because it cannot be called hoeses.
A mason, or stonemason