To restore the gardens and grounds, Grosvenor employed John Webb, a pupil of William Emes, who had been the previous designer of the landscaping around the house. New terrace walls were created on the east side of the house. Belgrave Avenue, the approach to the house from the west, was levelled and drained, and 130,000 trees were planted along it. The paths along the approach, which was long, were made between and wide, so that they would be suitable for the use of carriages. On the east side of the house a serpentine lake was created on the near side of the River Dee. By the 1820s formal garden beds were becoming fashionable and William Andrews Nesfield was employed to design formal parterres around the house. He added more terracing, balustraded walls, and flower beds surrounded by box edging.