Complex sentence: McLean retired to Christchurch, where he had a house of enormous dimensions built in a fusion of Jacobean and Victorian style for himself; a house of 53 rooms in three floors spread over an area of 23,000 sqft with lavish period furnishings and other embellishments.
Split into simpler sentences: McLean retired to Christchurch, where he had a house of enormous dimensions built in a fusion of Jacobean and Victorian style for himself. 'Holly Lea' contained 53 rooms on three floors spread over an area of with lavish period furnishings and other embellishments.