Where the total project cost is £10,000 or more, a lead professional advisor (usually an architect, chartered building surveyor or chartered architectural technologist) must be appointed.
Lle mae cyfanswm cost y prosiect yn £10,000 neu fwy, mae'n rhaid penodi cynghorydd proffesiynol arweiniol (pensaer, syrfëwr adeiladu siartredig neu dechnolegydd pensaernïol siartredig fel arfer).