If I sign an agreement on a builder’s letterhead, will it hold up in court if they break the rules? I’m planning to pay them in cash, so I’m worried about the validity of the agreement. The company is a sole proprietorship.

A builder’s letterhead, while adding formality, does not automatically guarantee legal enforceability. Paying in cash, while not explicitly illegal, makes it harder to prove the agreement’s existence. Consult a legal professional to ensure the agreement is properly drafted and protects your interests.