My mother's bungalow was built in about 1960, and is set 30ft back from the road, behind what is/was known as the 'building line'. Whenever a discussion comes up regarding the size of the front garden, or putting an extension onto the bungalow, she always brings up the 'building line', that it's sacrosanct and nothing can be built in front of it.
Is this still the case? Is building in front of the building line still an absolute no-no, is it now dependent on local planning authorities and circumstances, or is it just a thing of the past, long since forgotten and no longer enforced or relevant?