Policy information sourced from the Hillingdon Local Plan: Part 1
BE22 Residential Extensions/Buildings of Two or More Storeys
Residential extensions and buildings of two or more storeys in height should be set back a minimum of 1 metre (1.5 metre in the Copsewood and Gate Hill Farm estates, Northwood and the Drive, Ickenham) from the side boundary of the property for the full height of the building.
For more information please see Appendix 5 of the Local Plan: Part 1