Spons is the probably the only reliable data-base for estimating the costs of building anything from a house to a hospital.
Based on London rates for materials and labour, the costs can be related to any part of the UK by Regional comparisons.
As Spons has now gone through so many editions, year-on-year, the layout has passed the test for ease of access to the most detailed of building operations, as may be necessary from demolition to topping out.
It has a good introduction and guide for those entering into cost estimates of builders' work for the first time. Also there are good examples of selected building projects for those lacking experience of the Construction Industry. However, for the inexperienced it would be unwise to rely on Spons for anything but the most straightforward of building projects.