I was wondering what peoples thoughts are on the inclusion of a windfall allowance in your housing trajectory figure. I have just undertaken a windfall assessment and found that we have a consistantly high number of both large and small windfall sites conmming forward. For the small sites we are looking to include 90% of the average into our housing trajectory figure but I am struggling to find guidance on what a fair proportion of large sites can be included. I currently am thinking of including 20% of the average large site unit number as I feel that even through the HELAA process not all sites will be captured. This has been shown from non SHLAA sites making up the majority of large sites in the windfall assessment.
any thoughts would be greatly appreciated.
