In English law a frontager is a person owning or occupying land which abuts on a highway, river, sea-shore, or the like. The term is generally used with reference to the liability of frontagers on streets to contribute towards the expense of paving, draining, or other works on the highway carried out by a local authority, in proportion to the frontage of their respective tenements. Sweet.
The term is also in a similar sense in American law, the expense of local improvements made by municipal corporations (such as paving, curbing, and sewering) being generally assessed on abutting property owners in proportion to the “frontage” of their lots on the street or highway, and an assessment so levied being called a “frontage assessment” Neenan v. Smith, 50 Mo. 531; Lyon v. Tonawanda (C. C.) 98 Fed. 366.