In dealing with the construction contract

to establish a contract is a result of judgment of facts

to be valid is a result of judgment of law and to come into force includes both above two. There is some close relation between subcontracting construction partly and general contracting

contract subcontracting

joint contract

but is different from subcontracting construction wholly in nature. The reasons

causing construction contract to be null and void

are various. In dealing with invalid ones

the clients should be claimed to undertake some responsibilities according to different conditions. These responsibilities involve relevant administrative responsibility in addition to civil responsibility such as reimbursement

compensation at a discount

restitution of damages and taking over the property.