"There would be a significant disincentive for current homeowners to sell their homes since they will experience the full force of assessments based on higher prices in the real estate market."
That line comes from a tax policy analysis of Georgia's House Bill 581, the state law that rewrote how homestead property is taxed, circulated as Georgia news outlets covered the law's opt-out fight in January 2025. It was written as a warning about the state as a whole. In Johns Creek, it describes something that's already been happening for years, quietly, one closing at a time.
If you've searched for how property taxes work in Johns Creek, you've probably run into a version of this sentence: Fulton County opted out of the new statewide tax cap, so there's no protection here. That's not wrong exactly. It's also not the whole story, and the missing two-thirds change what a buyer should actually expect to pay.
The "Fulton opted out" story is only a third true
House Bill 581 gave every Georgia county, city, and school district a one-time window, closing March 1, 2025, to opt out of a new statewide floating homestead exemption that caps how fast a home's taxable value can grow. Most of the reporting on this treats each county as a single decision. Fulton wasn't one decision. It was three, made by three separate governing bodies, and they didn't agree.
Fulton County's general government opted in. County Commission Chairman Robb Pitts said at the time that the county wanted to be "clear that Fulton County is committed to property tax relief for homeowners." That part of your bill is covered by the new state cap.
Fulton County Schools opted out, but the reasoning had nothing to do with resisting tax relief. The district already had its own floating exemption in place, capped at 3 percent or the Consumer Price Index, whichever is lower, dating back to 2018. In its own presentation to the school board, the district noted the two exemptions "perform identically until inflation goes over 3 percent, then the FCS exemption is more beneficial to the taxpayer." Opting out of the new law meant keeping the better deal they already had.
The City of Johns Creek didn't vote to opt out at all, because it never needed the new law in the first place. City Communications Director Bob Mullen explained the council's reasoning plainly: the council decided against opting out "to ensure residential homeowners will receive the floating homestead exemption that would be most beneficial to them, either the existing one that was already in place or the one created by HB-581." Johns Creek has run its own local floating homestead exemption on the city portion of the bill since 2018.
Stack those three together and here's what a homesteaded Johns Creek owner is actually working with in 2026:
- County taxes: capped under the new statewide floating exemption, opted in
- School taxes: capped under Fulton County Schools' pre-existing 3 percent or CPI exemption, older than the state law
- City taxes: capped under the City of Johns Creek's own floating exemption, in place since 2018
Nearly the entire bill already carries some form of assessment-growth protection, and has for eight years in two of the three categories. That's a very different picture than "no cap applies here."
What a base year actually freezes
Every version of this exemption works the same basic way. The county sets a base year value for your home, usually the year you first qualified for the homestead exemption. Each year after that, the amount you're taxed on can only rise by the capped rate, either inflation or 3 percent, whichever your jurisdiction uses. The difference between that capped number and what the county's assessors say your home is actually worth becomes the exemption. Your home's real market value keeps climbing. The number the county taxes you on doesn't climb nearly as fast.
This is exactly why a homeowner who's held a Johns Creek property since, say, 2019 can be sitting on a home worth well over its purchase price while still being taxed on an assessed value that looks almost frozen in time. The cap has been quietly doing its job for years on the city and school portions of the bill, longer than most homeowners here even realize.
The gap that opens the day you close
None of that protection transfers when the home changes hands. A base year resets to the current fair market value the moment a new owner qualifies for their own homestead exemption. So a buyer closing on a Johns Creek home in 2026 doesn't inherit the seller's 2018 or 2019 base year. They start fresh, at whatever the county says the home is worth today.
That means two nearly identical homes on the same street, same square footage, same school zone, can carry meaningfully different tax bills for reasons that have nothing to do with the house and everything to do with the calendar. The seller's protected assessed value dies at the closing table. The buyer's own clock starts at market price.
You can see the range this produces just by looking across Johns Creek's own ZIP codes. Current property tax estimates for the city show effective rates ranging from roughly $3,760 a year in 30022 up to $6,767 in 30024, a gap driven in part by differences in school district levies and how recently properties in each pocket have turned over. Some of that spread is location. Some of it is simply how long the current owner has held the base year clock.
This isn't unique to Johns Creek, but it's sharper here because the protections run deeper and further back than most buyers assume. Similar structural mismatches elsewhere in metro Atlanta, where one jurisdiction's exemptions differ sharply from a neighboring one, have been shown to produce annual tax differences in the thousands of dollars on otherwise identical purchase prices. Johns Creek doesn't need to cross a county line to produce that kind of gap. With two of its three tax layers protected since 2018, it can produce a version of the same gap just by comparing a longtime owner to a first-year one on the same street.
The 2026 tax year is a live example of the mechanism at work even without a base-year reset. Johns Creek held its city millage rate at 3.492 mills for 2026, the same number as 2025. Flat rate, same as last year. But because assessed values across the city kept climbing, holding that rate steady still counted under Georgia's truth-in-taxation rules as a property tax increase, roughly 5.91 percent for the average homeowner this year according to the city's own published notice. The rate didn't move. The value did. That's the entire mechanism in miniature, and it's the same force that will apply to a new buyer's base year the moment they close.
What this should change about how you compare two listings
If you're comparing Johns Creek against other North Fulton or East Cobb submarkets, or comparing two Johns Creek listings against each other, the current tax bill on the listing sheet tells you what the seller pays. It does not tell you what you'll pay.
A more useful question to ask before you write an offer: how long has the current owner held the homestead exemption, and does the assessed value on record look close to the home's actual market value, or well below it? A home that's been owned since 2018 or earlier, sitting in a base year locked years behind current prices, will very likely see a bigger jump for a new owner than a home that changed hands more recently and already reflects something close to today's market.
None of this shows up in a median price comparison. It shows up in the first full tax year after you move in, when your own base year gets set for the first time, at your purchase price, with none of the years of accumulated protection your neighbor has.
The longer view
That early warning about long-tenured owners being reluctant to sell isn't abstract in a market like this one. When the gap between a protected base year and a reset one is real money every year, it becomes a real reason to stay put. That has a quiet effect on buyers too: some of the inventory you'd expect to see turn over in a mature, established city like Johns Creek may simply be staying off the market longer than it would in a place where the tax math resets less dramatically at sale.
None of this is a reason to avoid Johns Creek. The layered protection here means most current owners are paying less than a strict market-value tax bill would suggest, which is a genuine benefit of buying into a city that's had this infrastructure in place since 2018. It's a reason to run the actual numbers on a specific house before you compare it to the one down the street, because the tax bill you inherit and the one your future neighbor already has are not the same calculation.
If you're weighing a purchase in Johns Creek or trying to understand what a specific listing's tax history actually means for your first year of ownership, The Key Group can walk through the numbers with you before you write an offer. Schedule a free consultation and we'll help you separate what a house costs today from what it's likely to cost you once your own base year is set.
