You can apply for an award of costs if anyone involved in your appeal has cost you money by behaving unreasonably, for example missing deadlines.
Gallwch wneud cais am ddyfarnu costau os oes unrhyw un sy’n ymwneud â’ch cais cynllunio a alwyd i mewn wedi achosi i chi fynd i gostau trwy ymddwyn yn afresymol, e.e.