This document is a revision of the original guidelines developed by UNHCR in 2012 and 2013 and the last edition, which was published in May 2014 and led by a committee chaired by NRC. The revision of this guideline was initiated following the request of the associated Temporary Technical Committee (TTC) on 23rd February 2015.The sub-standard building rehabilitation complements other main shelter approaches in -Cash for Shelter supports vulnerable households in buildings meeting minimum standards, for example a finished house/apartment or a property rehabilitated by another agency.-Weather proofing and WASH upgrades are a cheaper, emergency intervention that improve living conditions in sub-standard buildings, albeit without rent-free/reduction periods.This is a working document and subject to change by contributing agencies.