4.18 Building control are accountable to all who are impacted by their actions (or inaction), as well as the regulatory authority.
4.18 Mae cyrff rheoli adeiladu yn atebol i bawb y mae eu gweithredoedd (neu eu diffyg gweithredoedd) yn effeithio arnyn nhw, yn ogystal ag i'r awdurdod rheoleiddio.