Frontage is the full length of a plot of land or a building measured alongside the road on to which the plot or building fronts. This is considered especially important for certain types of commercial and retail real estate, in applying zoning bylaws and property tax. In the case of contiguous buildings individual frontages are usually measured to the middle of any party wall.

In the United States, a frontage road

Frontage road

A frontage road is a non-limited access road running parallel to a higher-speed road, usually a freeway, and feeding it at appropriate points of access...

is one which runs parallel to a major road or highway, and is intended primarily for local access to and egress from those properties which line it.

River frontage and ocean frontage is the length of a plot of land that faces directly onto a river or ocean respectively. The amount of such frontage may affect the value of the plot.