We are about to exchange on a new build and have repeatedly raised concerns with the builder about the garden. We wrote to them evidencing lack of preparation of the ground to NHBC standards. The ground was compacted, not rotavated prior to turf laying and there wasn’t the required 100mm of topsoil. We sent many photos showing turf being laid directly onto debris, including set cement pieces, glass, large stones, a mass of growing weeds, etc. A large planter area is full of weeds without topsoil and totally unfit for cultivation. We raised concerns over water logging and insisted they rotavate to restore drainage characteristics. The builder simply replied that they did rotavate and totally ignored our photographic evidence proving they had contravened NHBC standards. NHBC informed us they cannot intervene until completion and we are the legal owners of the property but we really want it sorting out before we move in. Any advice anyone?