This may require the contract-holder to provide evidence to the court, possibly in the form of an expert such as a builder or surveyor to confirm the dwelling is unfit for human habitation.
Os felly, efallai y bydd angen i ddeiliad y contract ddarparu tystiolaeth i'r llys, o bosibl ar ffurf arbenigwr megis adeiladwr neu syrfëwr i gadarnhau nad yw'r annedd yn ffit i fod yn gartref.