Nid yw cyfanswm costau'r prosiect wedi'u cyfrifo'n derfynol hyd yma ac maent yn destun proses ddilysu ar hyn o bryd a fydd yn cymryd sawl mis i'w chwblhau; Fodd bynnag, credir ar hyn o bryd y bydd y prosiect wedi costio tua £50 miliwn yn erbyn cyllideb wreiddiol o £57 miliwn.
The total costs of the project are still being finalised through a verification process that will take several months to complete; however, current indications are that the project will have cost circa £50 million against an original forecast budget of £57 million.