[2] In the 15th century the manor of Southwells, into which Grove Place was incorporated, came to be possessed by the Dean and Canons of St George's Chapel in Windsor Castle.

Several estates in the area were purchased by a merchant from Southampton named John Mill in the 1520s, and his son Thomas leased the house and six acres of garden at Grove Place from Romsey Abbey.

Following her death, her son Henry was given the opportunity to buy the property but he declined, with the building being sold to Isaac Pothecary and William Symes of Bishop's Waltham for £5,000, with a mortgage from Harriette Middleton's friends Thomas Burdon of London and Alexander Frederick Patterson of Southampton.

[6] As well as private patients, the asylum at Grove Park accepted paupers from poor law unions in the area, but the two groups were treated very differently.

[6] Magistrates visited Grove Place in 1853 and, finding evidence that a patient there had been treated cruelly and severely, they recommended that the owner's licence to run the asylum be discontinued.

[3] Baillie paid a considerable sum to take over the asylum and the Lunacy Commissioners reported in 1854 that they were concerned he would attempt to seek a return on his investment by cutting back further on the quality of the patients' accommodation.

[2] The estate is now owned by LifeCare Residences Ltd, who have converted the house into retirement flats and built several modern buildings in the grounds, including a two-storey, 54-bedroom care home and associated car park;[10] a workshop complex with garage, mess and mobile home park;[11] an extension to the school building and several bungalows;[12] and a gymnasium and swimming pool complex.