Title: Corner Lot Setbacks, Sight Triangles, and House Size | FOUND Description: A corner lot faces two streets, so it carries a second street setback, a sight triangle, and driveway limits. How two North Carolina ordinances set them. Canonical: https://lotsfound.com/insights/corner-lot/ # Corner lots: setbacks, sight triangles, and what fits A corner lot sits where two streets meet, so it has two street sides. Most ordinances apply a street setback on both sides and keep a sight triangle clear at the corner. The result is a narrower building area than an interior lot of the same width. [Start an infill lot search](/services/infill-lots/) In this article 1. [What a corner lot is](#what-a-corner-lot-is) 2. [Front, side, and rear on a corner lot](#front-side-and-rear-on-a-corner-lot) 3. [Sight triangles](#sight-triangles) 4. [Driveway placement](#driveway-placement) 5. [What it means for house size](#what-it-means-for-house-size) 6. [Splitting a corner lot](#splitting-a-corner-lot) 7. [Who answers the question](#who-answers-the-question) 8. [Key recap](#key-recap) 9. [Questions](#questions) 10. [References](#references) > **Quick summary:** This guide explains which lines count as front, side, and rear on a corner lot, how a sight triangle works, where a driveway can go, and what those rules do to house size. It is for infill builders and buyers who are pricing a lot at an intersection. The key takeaway: a corner lot loses width to a second street setback, and the local ordinance decides which street is the front. ## What a corner lot is A corner lot is a lot that touches two or more streets where they meet. Durham's [defined terms](https://udo.durhamnc.gov/udo/17_03_Defined%20Terms.htm) put it that way: a lot abutting two or more streets at their intersection. The same section separates it from a double-frontage lot, which touches two streets that do not meet at the lot. The extra street side is the source of every corner lot rule. A street side carries a street setback, a view the driver needs, and a place where a driveway might go. ## Front, side, and rear on a corner lot The ordinance decides which line is the front, and two North Carolina ordinances do it in different ways. Read the clause before you place a house, because the rear setback is usually the deepest. ### Raleigh Raleigh names four [setback types](https://udo.raleighnc.gov/sec-154-building-setbacks): primary street, side street, side, and rear. Street setbacks are measured from the edge of the existing or proposed right-of-way, whichever is greater. For a detached or attached house, the same section sets how a corner lot picks its primary street: 1. **Opposite the neighbor's rear yard.** The primary street is the one opposite the rear yard of any adjoining lot. 2. **Narrowest frontage.** If the lot abuts only side yards, or another corner lot, the primary street is along the narrower frontage. 3. **Close lengths.** If the two frontages are within 10 percent of each other in length, either street may be primary. 4. **Major streets.** A Major Street is never the primary street. The other street is the side street. Planning staff confirm which line counts as the rear. ### Durham Durham lets the applicant choose. Its [yard rules](https://udo.durhamnc.gov/udo/6_12_Measurement%20and%20Computation.htm) give a corner lot only one rear yard, which the applicant picks. The other yards are side yards or street yards, as they apply. Durham measures required yards from the property line or the street right-of-way. Where an adopted transportation plan sets a wider right-of-way, the yard is measured from the proposed line. On a corner lot, a planned street widening can move both street yards back. > **The short version:** Each street side of a corner lot carries a street setback. The ordinance, or the applicant under it, decides which street is the front and which line is the rear. ## Sight triangles A sight triangle is a clear area at a corner that keeps drivers able to see cross traffic. Inside it, the ordinance limits fences, walls, plants, and buildings. Durham's [street standards](https://udo.durhamnc.gov/udo/12_03_Streets.htm) set the dimensions: - **At an intersection.** Connect two points on the pavement edges, each 25 feet from where the edges, or their extended lines, meet. - **At a driveway.** Measure 10 feet from the back of curb and 70 feet from the edge of each side of the driveway. - **What is barred.** No structures, fences, or plants between two and one half feet and eight feet in height, measured from the street or drive grade. The same section shapes the corner itself. Property lines at the corners of intersecting streets must be at least the hypotenuse of a triangle with 20-foot legs along both rights-of-way, or larger where the city or NCDOT requires. A new corner lot can lose that triangle of land to the right-of-way. Fences on a corner lot face a second limit. Raleigh's [wall and fence rules](https://udo.raleighnc.gov/sec-728-walls-and-fences) cap a wall or fence in a front or side street setback at six and one half feet, and limit its opacity above 4 feet to 50 percent. A sight triangle can set a lower limit near the corner. ## Driveway placement A corner lot often has a choice of street for its driveway, but not near the intersection. Raleigh's [site access rules](https://udo.raleighnc.gov/sec-835-site-access) for residential driveways set these limits: - **Alley first.** Where an improved alley at least 20 feet wide is provided, vehicle access comes from the alley. On a corner lot, access may also come from the side street. - **Distance from the corner.** A driveway that does not come from an alley may meet a street no closer than 20 feet from the intersection of the two street rights-of-way. - **Count.** No residential lot may have more than two driveways on the same street. - **Front yard paving.** Parking and driveway areas may not cover more than 40 percent of the area between the front building line and the front property line. If either street is state-maintained, NCDOT reviews a driveway onto it. See [NCDOT driveway permit: how access to a state road works](/insights/ncdot-driveway-permit/). > **Take action:** Send the corner lot's address or parcel number, and get a first read of its district, its setbacks, and the street that counts as the front. Start with [Can the house you want fit on this lot?](/services/infill-lots/) ## What it means for house size A corner lot of the same width as an interior lot holds a narrower house. Raleigh's [detached house table](https://udo.raleighnc.gov/sec-221-detached-house) shows why with its own numbers. | R-4 district, 65-foot lot | Interior lot | Corner lot | |---|---|---| | Setback on one side | 10 ft side | 20 ft side street | | Setback on the other side | 10 ft side | 10 ft side | | Width left for the house | 45 ft | 35 ft | In R-10, the table sets a 45-foot lot width, a 10-foot side street setback, and a 5-foot side setback. An interior lot keeps 35 feet of width, and a corner lot keeps 30 feet. Depth can change too. If the ordinance or the applicant makes the long side the front, the rear setback falls across the short dimension of the lot. Draw the house both ways before you pick. Other rules then cut in. Infill compatibility rules, the sight triangle, and the corner right-of-way can each take more ground. See [Setback requirements: what they are and how to find them](/insights/setback-requirements/) for how setbacks stack on a lot. ## Splitting a corner lot A corner lot can look like a split candidate, because the second street offers frontage for a new lot. The second street setback and the sight triangle often make it harder. The split still has to leave both lots meeting the width, depth, and setback rules, and the original house still has to meet its setbacks against the new line. See [Lot split: can you split your lot](/insights/lot-split/) and [How many lots is this tract, really?](/services/residential-tracts/). A deep corner lot can sometimes hold a lot behind the house instead, served by a strip to the street. That shape has its own standard. See [Flag lot: what it is and when a town allows one](/insights/flag-lot/). ## Who answers the question Planning staff answer which street is the front and how the setbacks apply. Other parties answer the rest. - **Planning staff** confirm the district, the primary street, and any infill rules. - **A licensed land surveyor** locates the right-of-way lines and draws the setbacks on a plot plan. - **The town's transportation staff or NCDOT** review the driveway and the sight triangle. - **A North Carolina real estate attorney** reads any recorded covenant or plat building line. The public record shows the zoning district, the platted lines, and the street names. It does not show where a widening plan moves the right-of-way on the ground. We read the record in a fixed order and hand you the open questions. ## Key recap - A corner lot touches two or more streets at their intersection, so it carries two street setbacks. - Raleigh sets a rule for which street is primary. Durham lets the applicant choose the one rear yard. - A sight triangle at the corner and at each driveway limits fences, walls, plants, and buildings. - Driveways stay back from the intersection and can often come from the side street. - On the same lot width, a corner lot leaves a narrower building area than an interior lot. ## Questions ### Which side is the front of a corner lot? The ordinance decides. Raleigh makes the primary street the one opposite the neighbor's rear yard, or the narrower frontage in some cases. Durham lets the applicant pick the one rear yard. Planning staff confirm the answer for a given lot. ### Does a corner lot have two front setbacks? Usually it has two street setbacks, though the second one may be smaller. In Raleigh's R-4 district, the primary street and side street setbacks are both 20 feet. In other districts or towns, the side street setback differs from the front. ### Can I put a fence on a corner lot? Yes, within the limits. The street setback rules cap fence height and opacity, and the sight triangle bars fences in a set height band near the corner. Check both sections before you build. ### Is a corner lot worth more or less? That is a question for a licensed appraiser. The record shows the setbacks and the access rules that shape the house, and the appraiser weighs them against sales. ## References Primary sources cited on this page, in APA style. - City of Durham, & Durham County. (2026, June 22). *Sec. 12.3. Streets*. Durham Unified Development Ordinance. [https://udo.durhamnc.gov/udo/12_03_Streets.htm](https://udo.durhamnc.gov/udo/12_03_Streets.htm) - City of Durham, & Durham County. (2026, June 22). *Sec. 17.3. Defined terms*. Durham Unified Development Ordinance. [https://udo.durhamnc.gov/udo/17_03_Defined%20Terms.htm](https://udo.durhamnc.gov/udo/17_03_Defined%20Terms.htm) - City of Durham, & Durham County. (2026, June 22). *Sec. 6.12. Measurement and computation*. Durham Unified Development Ordinance. [https://udo.durhamnc.gov/udo/6_12_Measurement%20and%20Computation.htm](https://udo.durhamnc.gov/udo/6_12_Measurement%20and%20Computation.htm) - City of Raleigh. (n.d.). *Sec. 1.5.4. Building setbacks*. Raleigh Unified Development Ordinance. Retrieved October 3, 2026, from [https://udo.raleighnc.gov/sec-154-building-setbacks](https://udo.raleighnc.gov/sec-154-building-setbacks) - City of Raleigh. (n.d.). *Sec. 2.2.1. Detached house*. Raleigh Unified Development Ordinance. Retrieved October 3, 2026, from [https://udo.raleighnc.gov/sec-221-detached-house](https://udo.raleighnc.gov/sec-221-detached-house) - City of Raleigh. (n.d.). *Sec. 7.2.8. Walls and fences*. Raleigh Unified Development Ordinance. Retrieved October 3, 2026, from [https://udo.raleighnc.gov/sec-728-walls-and-fences](https://udo.raleighnc.gov/sec-728-walls-and-fences) - City of Raleigh. (n.d.). *Sec. 8.3.5. Site access*. Raleigh Unified Development Ordinance. Retrieved October 3, 2026, from [https://udo.raleighnc.gov/sec-835-site-access](https://udo.raleighnc.gov/sec-835-site-access) ## Residential lots and subdivision - [How many lots is this tract, really?](/services/residential-tracts/) - [Can the house you want fit on this lot?](/services/infill-lots/) - [How many lots could this tract hold?](/tools/lots-per-acre-calculator/) - [How many houses fit on an acre](/insights/how-many-houses-per-acre/) - [What is a paper lot](/insights/what-is-a-paper-lot/) - [How to subdivide land in North Carolina](/insights/how-to-subdivide-land/) - [Minimum lot size: what it is and how to find it](/insights/minimum-lot-size/) - [Lot split: can you split your lot](/insights/lot-split/) - [Land that works for the product you build](/who-we-serve/homebuilders/) - [Know the ground before you buy it](/who-we-serve/investors/) - [The land development process: from raw tract to recorded lots](/insights/land-development-process/) - [Stormwater rules for a new subdivision in North Carolina](/insights/stormwater-rules-for-subdivisions/) - [Traffic impact analysis: when a development needs one](/insights/traffic-impact-analysis/) - [Conservation subdivision: clustered lots and open space](/insights/conservation-subdivision/) - [What is infill development](/insights/infill-development/) - [Flag lot: what it is and when a town allows one](/insights/flag-lot/) - [Lot of record and nonconforming lots](/insights/lot-of-record/) - [Accessory dwelling units in North Carolina](/insights/accessory-dwelling-unit/) - [Demolition permit and asbestos survey before a teardown](/insights/demolition-permit-and-asbestos-survey/) - [Missing middle housing: duplexes, triplexes, and townhouses on single lots](/insights/missing-middle-housing/) - [Tree removal permits and tree rules on a lot](/insights/tree-removal-permit/) - [Water and sewer tap fees and system development fees](/insights/water-and-sewer-tap-fees/) - [Future land use maps: what a comprehensive plan says about a tract](/insights/future-land-use-map/) - [Barndominiums in North Carolina: land, zoning, and permits](/insights/barndominium-north-carolina/) - [Putting a manufactured home on land in North Carolina](/insights/manufactured-home-on-land/) - [Tiny home zoning in North Carolina](/insights/tiny-home-zoning/) - [Land clearing: what drives the cost and what needs a permit](/insights/land-clearing-cost/) - [Townhome lots: how a townhouse subdivision works on the land](/insights/townhome-lot/) - [Manufactured home parks in North Carolina: zoning and permits](/insights/mobile-home-park-zoning/) - [Retaining wall permits in North Carolina](/insights/retaining-wall-permit/) - [Building a house on land you own: the order of approvals](/insights/build-a-house-on-land/) - [Living in an RV on your own land in North Carolina](/insights/living-in-an-rv-on-your-land/) Send the requirements. We reply with how we would run the search. [Start an infill lot search](/services/infill-lots/) ## Tell us what the project needs Load, acreage, counties, and timeline. We reply with how we would run the search and where we would start. [Start a site search](/contact/) [Try the calculators](/tools/) Transactions are handled through a licensed North Carolina real estate brokerage.