Two houses sit half a mile apart on either side of Corley Mill Road. Same builder, same floor plan, same asking price on the portals. One of them will cost the buyer a signed annexation covenant, a different utility rate schedule, and a front-row seat to a $36 million road rebuild. The other will not. The Lexington corporate limit line is the single variable driving that split, and it never shows up on a listing card.
Buyers comparing Lexington subdivisions this summer are usually working from median prices and school assignment, both of which read the town as one continuous market. The town's own operating documents tell a different story. What follows is the mechanism a portal search can't see, walked in the order it actually surfaces during a transaction.
The clause hiding on the utility application
The friction shows up first at closing, not at the offer stage. The Town of Lexington's Utilities Department serves roughly 22,500 water and sewer customers, and its footprint extends well past the corporate limit line into unincorporated Lexington County. If the home a buyer just went under contract on is outside town limits and takes Town water or sewer, the application to transfer service into the new owner's name requires more than a photo ID and a closing disclosure. It requires a signed annexation agreement.
The language sits on the back of the service application, not on the MLS sheet:
Service outside of the corporate limits of the Town is provided contingent upon a valid annexation agreement being on file with the Town. Should a valid agreement at any time not be on file, the applicant acknowledges that the Town will require the execution of a valid agreement as a condition of continued service.
Read plainly, this is a covenant that follows the parcel. It obligates the current owner, and by extension the property, to petition into the Town if and when the parcel becomes contiguous to the existing town limits. Provision of service to a tenant does not void the requirement, per the application's own terms. Buyers touring homes in the pockets between town limits and the county — the areas around Old Cherokee Road, the Corley Mill corridor, and the stretches north of Sunset Boulevard — should assume this document is coming, and read it before the closing table, not at it. The Town publishes the service application at lexsc.gov with the terms attached.
Impact fees are a moving target through 2026
The second mechanism affects new construction pricing directly, and it is being repriced in real time. The Town Council adopted an impact fee ordinance effective February 1, 2020, following a comprehensive study, to offset the off-site cost of transportation, parks, and municipal facilities generated by new development. Fees are determined before the issuance of a building permit and must be remitted in full before that permit is released. That timing matters: an impact fee is not a closing cost the buyer of a resale home worries about. It is a cost the builder pays up front and then embeds in the price of every new home coming out of the ground inside town limits.
On May 4, 2026, the Town Council took first reading on a Phase 2 Impact Fee Update, which the Planning Commission had recommended for approval in April. The Council packet for that meeting also included final approvals on a 51-unit townhome planned unit development at 100 Snelgrove Road and a letter of support for Woodland Townes, so this is not an academic exercise. It is a schedule change landing inside the same council cycle as active in-town residential approvals. Buyers pricing new construction in-town this summer are seeing spec sheets built against a fee schedule that is being rewritten around them. The town's impact fee page is where the final schedule will land once Council completes readings.
Same house, two sides of the line
The table below distills the operational differences a buyer will actually feel. None of it appears on the listing.
| Line item | Inside town limits | Outside town limits (Town utility service) |
|---|---|---|
| Water/sewer application | Service application, ID, closing disclosure | Service application, ID, closing disclosure, annexation agreement |
| Zoning authority | Town of Lexington | Lexington County zoning ordinance |
| New-construction impact fees | Assessed before building permit; Phase 2 update pending Council readings in 2026 | Not assessed by Town |
| Property tax jurisdiction | County plus Town millage | County only |
| Business license | Town-issued where applicable | County does not issue business licenses |
The tax and millage side of that comparison is worth walking through with the closing attorney rather than an agent, because it changes with parcel and use. The point of the table is not to argue that one side of the line is a better buy. It is to make clear that the line itself is a real variable, and that treating "Lexington" as one address book is the mistake portals encourage.
The Sunset Split will price into every west-side tour this year
The third mechanism is a road, and it is going to reshape how buyers experience the west side of town during the entire showing season. The Corley Mill Gateway Project, known locally as the Sunset Split, is a $36 million SCDOT-partnered rebuild of the US 378 and Corley Mill Road intersection just off Interstate 20. The Town has moved the project into its construction phase in 2026, with a completion target in the 2027 to 2028 window. Eastbound and westbound US 378 will be separated through the intersection, and Corley Mill Road will be relocated slightly to the west.
The case for the project is in the crash data. SCDOT recorded 88 crashes at Corley Mill and US 378 between 2022 and 2024, concentrated at the peaks and at midday on Tuesdays and Thursdays, per reporting by WLTX. This is also the intersection that carries traffic patterns for River Bluff High School and Meadow Glen. For a buyer touring homes on Corley Mill, Riverchase Way, or the neighborhoods just north of I-20 this summer, two things follow. First, any commute test drive done between now and 2027 is not the commute the property will have in 2028. Second, homes on secondary connectors that currently function as bypass routes around the intersection may see traffic patterns normalize once the split is open. The Town maintains a project page for the Corley Mill Gateway for construction updates.
Two smaller projects on the same corridor are already changing behavior. The Town reported a 38% morning improvement in right turns from US 378 onto Mineral Springs Road after the new turn lane opened, and the September 2025 opening of the 73-space Old Mill Municipal Parking lot at the base of the Old Mill Pond dam gave the downtown walking core a real park-once option. Both are worth walking a tour past.
What the numbers say and don't say
Median price data through spring 2026 shows a market that is neither cooling sharply nor accelerating. FRED's Realtor.com series for Lexington County put the median listing price at $319,950 as of April 2026, with median days on market at 40 as of May 2026, per the St. Louis Fed's Lexington County dataset. Those are neutral-market numbers. What they do not capture is the split described above. A resale home on well and septic outside town limits, a resale home on Town water with an old annexation covenant already recorded, a new-construction home priced against the pre-Phase 2 impact fee schedule, and a new-construction home priced against whatever the Phase 2 schedule becomes will all show up on the portal as the same number. They are not the same transaction.
What to ask before you write the offer
- Is this parcel inside the corporate limits of the Town of Lexington, or outside? The Town's Utilities Department at 111 Maiden Lane can confirm by address.
- If outside, is there already a recorded annexation agreement or covenant tied to Town water or sewer service? The listing agent should know, and if they don't, the Town will.
- If this is new construction inside town limits, which impact fee schedule was the price built against, and does the builder's contract address any Phase 2 revision that lands before the permit is issued?
- If the home is on the west side of the Sunset Boulevard corridor, has the buyer driven the commute at 7:45 a.m. and again at 5:15 p.m. this month, understanding those patterns will change during Sunset Split construction?
- What is the parcel's zoning authority, and if it is county-zoned, does the intended use match the zoning ordinance that will follow the deed?
None of these questions is exotic. All of them get asked too late.
The reason to work through them before an offer, rather than during the due diligence period, is straightforward. In a 40-day market, the buyer who already understands which side of the line their target house sits on is the buyer who writes a clean offer on the right property the first time. That is the version of local knowledge that shortens a search rather than lengthening it, and it is the version our team is built to provide. If you are weighing a Lexington move this summer and want a real read on how the corporate limit line and the corridor projects will price into your specific street, The SC Key Group is ready to walk it with you. Request Your Home Valuation to start the conversation.
