As the house was enlarged, the farm land surrounding the house was developed into an estate and when the Blairtummock estate and house was purchased from the Lamberton family in 1954, for development of housing, it consisted of . The Lamberton family owned the Lamberton and Co Ltd engineering steel works in Coatbridge. The Lamberton and Co Ltd works (from 1870) are now listed buildings themselves. The house and gardens were restored in 2008–09, partly as offices by the GEDC (architects, Simpson and Brown, 2006). The restored building includes a modern extension replacing the 1960s alterations, so adding a fifth phase of building. The walled gardens have had the original parterre restored. The tree-lined driveway to the house has been resurfaced and additional planting has restored the parkland setting of the house.