The basic elements required for the agreement to be a legally enforceable contract are: mutual assent , expressed by a valid offer and acceptance ; adequate consideration ; capacity ; and legality .
Contracts are described and thus defined on the basis of four criteria: explicitness (express, implied, or quasi-contracts), mutuality (bilateral or unilateral), enforceability (void, voidable, unenforceable), and degree of completion (executory, partially executed, executed).
The four main types include residential, commercial, industrial and infrastructure construction, but there are other types of construction as well as different ways to classify them, such as by sector, owner, occupancy or fire resistance.
Contract Types Comparison Party 1 offers Unilateral Services or goods that the other party requested, usually in an open request Implied Services or goods Express Anything Simple Something of value to the other party9 more rows •