municipal building alignment ordinance
municipal frontage line ordinance
municipal building line ordinance
municipal building setback ordinance

frontage line - A building line on a street where there is no setback

building line - The frontage line of a property on street

setback - A withdrawal of the building line from the street frontage, either at ground level or for the upper storeys of a tall building. It is required by town planning laws, to ensure that enough daylight reaches the street.
[Scott/Penguin Dict of Building]

buidling line - Line that defines the extent of a building beside a road so as to ensure adequate sight lines [BSI]

I've only Googled for one of my options above, finding 84 "setback alignment"