A buyer I was working with in the Southport area last year called me two months after closing, not angry, just puzzled. Her monthly Duke Energy bill had gone up noticeably since she moved in, and she wanted to know if her new HVAC was running inefficient. It wasn’t. What had changed was the load on the local grid — a large data center had come online nearby, and the surrounding residential customers were, in a roundabout way, feeling it.
That’s a simplified version of a more complicated story. But it’s a story agents along the Carolina coast need to understand, because the data center buildout happening right now from Brunswick County down through the Grand Strand is not slowing down. If you’re working buyers in markets where these facilities are being proposed, approved, or already operational, utility costs belong in your buyer conversation — not as a scare tactic, but as a factual piece of the ownership picture.
What Data Centers Actually Do to a Local Grid
A single hyperscale data center can draw anywhere from 20 to 100+ megawatts of power continuously. For reference, a megawatt serves roughly 750 to 1,000 average homes — last I checked, those estimates vary by region and season, so treat them as ballpark. The point is the scale: one facility can pull as much load as a small town.
When that kind of demand hits a local distribution system, utilities face a choice. They can build new infrastructure — substations, transmission lines, upgraded feeders — and they can recover those capital costs through rate adjustments. Sometimes they spread that cost across the entire rate base. Sometimes they negotiate a special industrial rate with the data center operator and leave residential customers to absorb the distribution upgrades through their standard rates.
That last part is where it gets interesting for your buyers.
The mechanism isn’t immediate or dramatic. Nobody’s bill doubles overnight. But over a 3-to-5 year horizon, in a market where a utility is actively expanding capacity to serve large commercial loads, residential rates can climb faster than they would have otherwise. Duke Energy Carolinas and Duke Energy Progress have both had rate proceedings in recent years — worth confirming the current status of any pending adjustments through the NC Utilities Commission if you’re working that market. The pattern of rate increases and what they mean for coastal households is something we’ve covered separately, and the data center load question adds another layer on top of it.
The Southport Situation Is Worth Watching Closely
Southport’s city council has been wrestling with this directly. They pushed for a data center moratorium while workshopping new zoning rules — the specifics of how those commercial restrictions are shaping the area around Southport matter if you’re working residential listings within a few miles of any proposed site.
The moratorium conversation itself tells you something. When a municipality hits pause to figure out what the rules should even be, that’s a signal that the infrastructure and land-use questions are moving faster than the planning framework. For buyers looking at properties in that market, “what’s being built nearby” is not a hypothetical — it’s a due diligence question with a real answer that you can look up in the current county planning files.
I’ve seen for-sale signs sit through two hurricane seasons in spots that had infrastructure surprises the sellers either didn’t disclose or genuinely didn’t know about. Don’t let utility cost trajectory be one of those surprises.
What You Should Actually Pull Before Closing
This isn’t a complete list for every transaction, but if your buyer is purchasing in a market with active data center development, run through these before you write an offer:
- Request 12 months of utility bills from the seller. Not just the most recent one. You want to see seasonal swings and any year-over-year trend.
- Check the utility’s current rate schedule. For Duke Energy customers in North Carolina, those schedules are public through the NC Utilities Commission. For Santee Cooper territory in South Carolina, check their published residential tariffs directly.
- Look at what’s been approved or proposed within 5 miles. County GIS and planning department files are the right tool. A data center under construction doesn’t show up in a home inspection.
- Ask whether any rate cases are pending. Utilities are required to file publicly when they seek rate changes. Your buyer should know if a case is pending that could affect bills in the first year of ownership.
- Factor estimated utility costs into your affordability conversation. If a buyer is already stretching on a coastal property — and coastal property comes with insurance costs that are nothing to shrug at — a $50–$80/month utility creep over two years isn’t trivial.
North Carolina home insurance costs have risen sharply in recent years, and that’s before you layer in the operational cost question from infrastructure changes nearby. The monthly ownership math matters, and agents who run it honestly tend to close with fewer surprises on the back end.
A Note on Industrial Rate Negotiations
One thing that sometimes gets lost: data center operators are sophisticated buyers of electricity. They negotiate. They often secure rates that are lower per kilowatt-hour than what you or your buyer will pay. That gap isn’t illegal or unusual — utilities have always had tiered pricing for large industrial customers. But it does mean the data center is not subsidizing the grid; if anything, the economics often run the other direction.
Some utilities argue that large commercial customers contribute enough in absolute dollar terms that they reduce per-unit costs for everyone. That argument has some merit in theory. In practice, the infrastructure buildout required to serve a 50-megawatt facility in a county that previously had nothing near that scale often outpaces whatever rate-dilution benefit the residential base sees. Worth looking at the specific utility’s rate case filings rather than accepting the marketing language at face value.
What to Tell Your Buyers
The honest version of this conversation goes something like: “There’s a data center proposed for [specific location]. I can’t tell you exactly what that does to your light bill over the next five years — nobody can — but here’s what we can look at together to get a clearer picture before you close.”
That’s the brief. Pull the utility history, check the planning files, and make sure the buyer understands that coastal infrastructure is changing fast — not just along the shoreline, but in the inland corridors where these facilities tend to land. The water, the grid, the traffic — it’s all connected, and the job is to hand your buyer a clear chart before they leave the harbor, not a foggy one.