Complex sentence: The property was sold to Barratt Homes and most of the old infirmary was demolished although the memorial wing has been retained and will be integrated into the re-development of the site and is planned to be converted into 53 apartments.
Split into simpler sentences: The property was sold to Barratt Homes and most of the old infirmary was demolished. The memorial wing has been retained for integration into the re-development of the site and is planned to be converted into 53 apartments.