English Heritage has agreed to the demolition of the Grade II-listed former Royal Observer Corps' headquarters in Winchester.
The building, in Abbotts Road, was constructed during the Second World War as a base for spotting Luftwaffe intruders and is regarded as the finest surviving example of its kind.
But now the site, which is owned by Bayview Developments, looks set to be razed to the ground and replaced by 22 homes after a planning committee last week heard that the building was beyond repair.
An English Heritage spokesperson said: 'This is a very difficult case, and it is always sad to lose a historic building.
'In this case, the amount of replacement of materials required, and the level of change necessary to convert the building to residential use, would take it below the level of special interest required to meet the listing criteria,' they added.by Max Thompson