Road frontage, explainedWhat the line along the road decides about access, entrances and dividing land
Road frontage is a measured line on a plat, a stretch of road where an entrance might go, and in some counties a condition for dividing land. This guide takes those three jobs one at a time, and shows where a recorded right-of-way can stand in for frontage.
A line on paper, a place for a drive, a condition for dividing
People use road frontage to mean three different things, and it helps to keep them apart. The first is a measurement: how long a lot line runs along a road, measured the way an ordinance says and recorded on a plat. The second is a location: the stretch of road edge where a driveway entrance can actually be permitted. The third is a condition: what a county asks a lot to have before it can be created or built on.
The three do not always line up. A tract can show a long run of frontage on its plat and still take its entrance at the one spot VDOT settles on along that run. A lot can be created in some counties with no public road frontage at all, reached instead by a recorded right-of-way. The short definition of road frontage sits in the glossary. What follows is how each of the three jobs works under the rules that Carroll, Floyd, Pulaski and Grayson counties have written down.
Measured back at the setback line, on Carroll's definition
Carroll County's subdivision ordinance says exactly where the frontage figure is taken. Its definition, as the county's posted copy reads, puts the measurement at the front setback line rather than where the lot first meets the road.
Floyd County's Land Division Ordinance, effective January 1, 2026, uses both ideas at once. In a Large Lot Division, a lot that fronts a public road or an approved private division road needs at least 100 feet of frontage and 175 feet of width at the setback line. A lot abutting a cul-de-sac needs 30 feet of frontage. A lot whose access is only on a right-of-way has no minimum lot width at all.
The ordinance wording itself, and Pulaski's shorter definition beside it, are quoted in the glossary definition of road frontage. The frontage of a particular parcel comes from its recorded plat, and where that line actually lies on the ground is a land surveyor's work.
Frontage offers a stretch of road; VDOT picks the spot
Where frontage meets a state road, the entrance is a separate question from the measurement. VDOT's Access Management Regulations apply to highways that are part of the systems of state highways, and on those roads VDOT will permit reasonably convenient access to a parcel of record. It is not obligated to permit the most convenient access, or to approve the owner's preferred entrance location or design.
For a private entrance, VDOT's Road Design Manual Appendix F says installation cannot be denied on the basis of sight distance. VDOT reviews the owner's highway frontage and determines a useable location with the best possible sight distance, and a preferred spot that lacks it can be denied. More frontage gives that review more road edge to work with. The design side of the choice is set out in what VDOT considers a safe entrance, and the paperwork in whether a driveway needs a VDOT permit.
Two county ordinances tie frontage to that entrance directly. For a Class A subdivision, Carroll's treats property as served by a state maintained road if it meets the road at a point where a driveway could be built. Pulaski's requires lot frontage to be topographically suitable for building an entrance onto the property. Under either rule, a run of frontage where no entrance could physically be built is not doing the second job.
A state route, a city street or a road left to its owners
Frontage is only as useful as the road it runs along, and VDOT's own descriptions separate the kinds of road a tract here is likely to touch.
- State secondary roads. VDOT describes them as local connector or county roads that generally carry route numbers of 600 and above. Generally is VDOT's own word, so a number on a sign is a clue rather than proof.
- City and town streets. VDOT says a separate urban street system is maintained by cities and towns with the help of state funds, and that Virginia's cities are independent of its counties.
- Roads the state does not maintain. Subdivision streets VDOT never accepted and older rural roads kept up by the people along them, both left to private upkeep in VDOT's own description.
Whether a run of state road frontage carries more weight than the same run on a private road is argued in whether frontage on a state road matters more. For this guide the point is narrower: the county rules below usually name the kind of road they mean, and the answer changes with it.
Grayson's zoning form asks about thirty feet of frontage or thirty feet of legal access
Before anyone divides anything, frontage comes up on the permit for a house on a single lot. Grayson County's zoning permit application, Form 0100 as revised October 25, 2024, asks for primary structures whether the parcel has at least 30 feet of road frontage on a state road, or a 30-foot-wide legal access to a state road, or other access.
The form then asks for the figure itself, the frontage distance or the legal width of the right-of-way, or another type of approved access, and so treats frontage and a legal right-of-way as answers to one question, the same pattern the division rules in the next two sections follow.
Frontage requirements in Wythe County, Montgomery County and the City of Galax were not read for this guide, so that locality's own planning or building office is the place to confirm them.
Carroll's three classes start from the road a tract touches
Carroll County's subdivision ordinance sorts divisions partly by the road that serves them. As the county's posted copy reads, the three lettered classes differ in the road that reaches the lots.
Class A
Land subdivided and roads built in a Class A subdivision must be served by state maintained public roads, under the driveway test described above.
Class B
Intended primarily for non-primary recreational dwellings, on lots of at least 2.5 acres that may not be resubdivided and receive no public services. A Class B subdivision may be served by an existing right-of-way at least 30 feet wide from a state maintained road, contingent on approved access under VDOT entrance standards. Its own streets sit in a right-of-way at least 40 feet wide, are not built to VDOT standards, and are maintained by the developer or a homeowners association.
Class C
For parcels existing and recorded in the Carroll County circuit court clerk's office before January 1, 2014 that lack the road frontage or acreage for Class A or B. At most five lots of at least 1.5 acres, a street right-of-way of at least 25 feet, and a roadway that serves no more than five parcels and ends at a cul-de-sac.
Class C is the plainest sign that a lack of frontage does not end the conversation in Carroll. It is not an open door either: a parcel not recorded before that 2014 date does not qualify. A flag lot, with a narrow pole of land running back to the state road, is another shape a Carroll division can take, and the county's limits on it are in what a flag lot is and when one can be created.
The copy the county posts carries amendments through April 14, 2014, and in one sentence it lists subdivisions as Class A, Class B or Family before defining Class C in the paragraphs that follow. Carroll County Land Use and Planning is the office to confirm the current text of the subdivision ordinance with.
Where a recorded right-of-way can stand in for road frontage
Floyd and Pulaski write alternatives to road frontage into their ordinances, and each one comes with conditions attached. Read side by side, they show why a line along the road is one way to reach a lot rather than the only way.
| Division type | What reaches the lot | Conditions attached |
|---|---|---|
| Floyd, Standard Division | Frontage on an existing public road or a proposed new public or private division road | Proposed new roads need a right-of-way at least 50 feet wide |
| Floyd, Large Lot Division | Public road frontage, or for lots without it, a right-of-way at least 50 feet wide to a public road | 25-acre minimum lot size, excluding a Limited Access Lot; no road construction required, though platted vehicular access must be practicable |
| Floyd, any plat served by an existing public road | The existing public road | Limited to 10 new lots, including the residual lot, whatever the mix of division types |
| Pulaski, large lot and standard subdivisions | A public roadway, a private 40-foot right-of-way or a private 40-foot access easement | The roadway or access is built at the time of platting to the ordinance's standards |
| Pulaski, agricultural subdivision | A public roadway, a private 40-foot right-of-way or a private 20-foot access easement | Lots of at least 25 acres, at most five lots; the access need not be built at platting, but its construction must be technically feasible |
Pulaski also denies a subdivision whose access is not deeded and recorded, and bars lots entirely surrounded by the parent parcel, the rule the landlocked entry takes up. A family division carries a right-of-way rule of its own, covered in what a family subdivision is in Virginia.
A parcel with neither frontage nor recorded access is the one people call landlocked, and whether and how such a parcel can change hands is taken up in selling land with no road access. What a given run of frontage adds in money has no rule behind it. That is an opinion of value on one tract, reached by walking it, not a figure any ordinance supplies.
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Good questions, straight answers.
Does a Floyd County lot reached only by a right-of-way need a minimum lot width?
No, not in a Large Lot Division. Floyd County's Land Division Ordinance, effective January 1, 2026, sets no minimum lot width where a lot's access is only on a right-of-way, and every lot in that division lacking road frontage must be served by a right-of-way at least 50 feet wide to a public road. A lot that fronts a public road or an approved private division road needs 175 feet of width at the setback line.
If a parcel touches two state roads, who decides which one takes the driveway?
VDOT does. Under the Access Management Regulations, when a parcel is served by more than one road in the systems of state highways, the district administrator's designee determines which road the proposed entrance is built on, so the choice of road is part of the permit review rather than the owner's to make alone.
Does the access easement in a Pulaski agricultural subdivision have to be built at platting?
No. In a Pulaski County agricultural subdivision, which allows at most five lots of at least 25 acres, each for a single residential structure and agricultural purposes only, each lot needs at least a public roadway, a private 40-foot right-of-way or a private 20-foot access easement, and that access need not be built at platting as long as its construction is technically feasible. The Pulaski County UDO Administrator confirms whether a proposed division qualifies.
Where this page's facts come from
Every rule, office and figure above traces to one of these. Rules change; check the office before you act on one.
- 24VAC30-73-30: the Access Management Regulations apply to highways in the systems of state highways Virginia Department of Transportation
- 24VAC30-73-10: definitions, including highway, street or road Virginia Department of Transportation
- 24VAC30-73-60: reasonably convenient access, and which road takes the entrance Virginia Department of Transportation
- 24VAC30-151-20: a permit grants only the rights set forth in it Virginia Department of Transportation
- Road Design Manual Appendix F: Access Management Design Standards for Entrances and Intersections Virginia Department of Transportation
- Our system: highways (secondary roads and urban streets) Virginia Department of Transportation
- Roads that qualify for state maintenance Virginia Department of Transportation
- Zoning Permit Application, Form 0100, revised October 25, 2024 Grayson County, Virginia
- Subdivision of Land ordinance, county-posted copy with April 14, 2014 amendments Carroll County, Virginia
- Floyd County Land Division Ordinance, effective January 1, 2026 Floyd County, Virginia
- Pulaski County Unified Development Ordinance, amended July 27, 2025 Pulaski County, Virginia