"A lot of it comes out of Raleigh," Union County Commissioner Melissa Merrell told residents this spring, trying to explain why property values across the county had just jumped by roughly 60 percent, and in some pockets by more than 80.
If you're comparing Mill Bridge against other Waxhaw neighborhoods right now, you've probably already run into that number. It shows up the moment you pull a property's tax record during a home search, and it tends to stop buyers cold mid-negotiation. A house priced at $620,000 shows an assessed value that jumped by more than half compared to a few years ago, and the instinct is to assume the annual tax bill jumped by the same amount. That assumption is the friction point. It's also wrong, and understanding why matters more for your offer than the headline percentage ever will.
What actually happens when a buyer sees that number
Union County completed a state-mandated property reappraisal effective January 1, 2025, and started mailing new assessed values to every property owner in March of that year. The county's own announcement anticipated a total valuation increase of about 60 percent, driven by more than 30,000 sales since the last reappraisal in 2021. That's a real number, and it's the one that ends up on Zillow-style data pulls and county GIS lookups that buyers check before they ever call an agent.
What doesn't show up in that same data pull is the other half of the equation: the tax rate itself dropped to offset the reappraisal. Reappraisals in North Carolina are required by law to reset assessed values to current market conditions, not to raise revenue, so counties are required to publish a revenue-neutral rate alongside whatever rate they actually adopt. Union County's adopted rate for fiscal 2025-2026 came in only 1.82 cents above that revenue-neutral figure, and that small increment was earmarked specifically for debt payments on school and community college capital projects that voters had already approved.
The rate cut nobody repeats when they repeat the 60% figure
Here's the part that gets left out of casual conversation and most portal-level data: the county tax rate fell from 58.80 cents per $100 of assessed value to 43.42 cents, a drop of more than a quarter, in the same cycle that assessed values rose 60 percent on average.
| Before reval (through FY 2024-25) | After reval (FY 2025-26) | |
|---|---|---|
| Union County rate | 58.80 cents / $100 | 43.42 cents / $100 |
| Town of Waxhaw add-on | 29 cents / $100 | 29 cents / $100 |
| Combined rate | 87.80 cents / $100 | 72.42 cents / $100 |
Run the arithmetic yourself on a home whose value rose exactly at the county's stated average of 60 percent. The old bill was value times 0.5880 percent. The new bill is that same value, times 1.60, times 0.4342 percent, which works out to 0.6947 percent of the original value. Divide the two and you get roughly an 18 percent increase in the county-only portion, not 60 percent. On a $620,000 assessment, the combined county-and-town bill lands around $4,500 a year, which is meaningfully below what a comparable value pays across the line in Mecklenburg County.
That gap between the headline percentage and the actual bill is the single most useful thing to understand before you make an offer in Mill Bridge this year, because it changes how you should read every tax figure a seller hands you.
Why this year's number is the one to trust
The appeal window for the 2025 reappraisal closed when Union County's Board of Equalization and Review adjourned on May 6, 2026. Barring a formal appeal already in progress, the assessed value on a Mill Bridge listing today is the number that holds until the next reappraisal cycle, which state law requires at least every eight years. That gives you a stable baseline to negotiate against, rather than a figure that's about to shift again in a few months. If a seller's disclosed tax bill looks high compared to what a similar house paid three years ago, that jump has already been priced into the rate cut. It isn't a sign the county is coming back for more.
What's actually built out here, and why that matters more than the median
Mill Bridge sits on roughly 900 acres off Providence Road South, planned for about 2,243 single-family homesites, and in 2026 it's overwhelmingly a resale market. Lennar, Pulte, and DR Horton built most of the community through the 2010s and into the early 2020s. DR Horton's section has been complete since late 2021, Pulte's Legends collection sold out, and DRB Homes has offered only the last small pockets of new construction. Typical homes here were built between 2008 and 2023, with a median build year around 2018.
That resale-only reality shapes what an inspection turns up. You're negotiating around a decade-plus-old roof, HVAC system, and water heater on a meaningful share of listings, not builder warranties. Sale prices over the trailing year ranged from $440,000 to $1.18 million, with a median list price sitting around $620,000 to $630,000 as of mid-2026. Days on market tell two different stories depending on whose data you pull: one tracker updated in June 2026 put the median at 21 days across all price points, while another recent snapshot describes buyer's market conditions with a median closer to 76 days and 47 active listings against 101 sales over the past year. That split usually means pricing discipline matters more than timing right now. Well-priced homes still move fast. Overpriced ones sit.
What $100 a month actually buys
Mill Bridge's HOA runs about $100 a month, typically billed around $604 to $609 semi-annually. That fee funds a staffed clubhouse, a lazy river and waterslide, a fitness center, sport courts, and roughly six miles of internal walking and biking trails connecting to the Community House and Nesbit Park. For a neighborhood with an aquatics complex that size, that's a strong amenity-per-dollar ratio worth comparing against any newer Waxhaw community quoting $150 or more for less.
The infrastructure you're moving into, not just the neighborhood you're touring
Two projects specific to Mill Bridge are worth tracking if you're deciding now versus waiting. NCDOT and the Town of Waxhaw are adding a traffic signal at the Kensington entrance to the neighborhood, aimed directly at the backups that build up during rush hour as cars stack up trying to get in and out. That project is slated to finish by late 2026. Separately, the Town of Waxhaw has been building a new natural-surface trail connecting Town Creek Park to Creekview Drive inside Mill Bridge, contracted to Blue Ridge Trail Works, following an informal path residents had used for years. That corridor was closed to the public through late June 2026 for regrading and a new 16-foot bridge over a drainage crossing, so that closure window has already passed and the connector should already be back in service this summer.
Zoom out one level and the state designated funding in March 2026 to widen Broome Street through downtown Waxhaw, with a roundabout planned at West South Main and Old Providence Road, both aimed at the same congestion that's been building as the town's population grew from under 10,000 in 2010 to more than 20,000 by 2020.
None of these projects change the median price. All of them change what living here feels like day to day, and they're the kind of detail that doesn't show up in a portal listing.
The bottom line
The 60 percent reappraisal figure is real, but it describes assessed value, not your tax bill. Once you account for the rate cut and the revenue-neutral math behind it, the actual increase on a typical Mill Bridge property lands closer to 18 percent, and the county's own numbers get you there. What should actually drive your decision this year is the resale-only inventory and its age, the amenity math on that HOA fee, and whether you're buying before or after the Kensington signal and the reopened trail change how the neighborhood functions on a Tuesday morning.
FAQ
Will Mill Bridge's tax bill jump again before the next reappraisal? North Carolina law requires reappraisal at least every eight years, and Union County's last two cycles were 2021 and 2025. Barring another emergency reappraisal triggered by unusual market divergence, this year's assessed value is the baseline for several more years, though the tax rate itself can still shift in future annual budget cycles.
Is Mill Bridge still building new homes in 2026? Mostly no. Lennar, Pulte, and DR Horton have finished their sections, and Pulte's Legends collection sold out. DRB Homes has offered a small number of final new-construction lots, but most of what you'll tour this year was originally built between 2008 and 2023.
If you're weighing Mill Bridge against another Waxhaw or Union County community and want someone to walk through the real math on a specific listing, tax bill included, Laura Arthur can help you separate the headline number from the one that actually lands on your closing statement.
