When a Grandview Heights listing shows an annual property tax figure, what does that number describe? It doesn't describe your future bill. It describes a past owner's tax, figured on the values from the last cycle, with that owner's credits applied. For anyone buying this fall, the gap between that figure and the coming bill is wider than usual, and the reason is not the headline value increase.
Here is the headline. The Franklin County Auditor released tentative 2026 values on June 9, 2026, covering more than 440,000 parcels. In the Auditor's school-district table, Grandview Heights City School District shows an average residential change of +14%. That matches Bexley, and only Madison Plains, at +20%, shows a larger average in the table. Upper Arlington shows +12%, Columbus City Schools +8%, and the countywide residential average is +10.1%. These figures are still tentative. The Auditor expects final values and mailed notices by mid-December 2026.
A 14% average does not turn into a 14% tax increase. A Grandview buyer's actual bill depends on three other factors, and each one shifts in tax year 2026.
The tax figure at closing comes from the old values
Ohio collects property tax in arrears. Bills go out roughly in January and July, and each covers half of the previous calendar year. So a seller always owes several months of tax that hasn't been billed yet when the home changes hands. The Franklin County Treasurer confirms that taxes can be paid only after the Auditor assesses them.
Purchase contracts handle this with a credit from seller to buyer. As a Finney Law Firm explainer lays out, form contracts usually base that credit on "the most recent available tax duplicate." Many also treat the proration as final at closing. The same piece notes that both values and rates can change retroactively after closing, and that a levy passed during a year applies back to January 1 of that year.
In late 2026 this produces a predictable mismatch. The most recent duplicate reflects values from before the update. The 2026 values that will set tax year 2026 bills, which get paid in 2027, aren't final yet. The exact formula belongs to the contract, which controls short versus long proration and whether the figure gets reconciled later. Grandview Heights has no city or school tax issue on the November 3, 2026 ballot, according to the Franklin County Board of Elections certified issue list, so this year's mismatch comes from values and credits, not a new levy.
Why your home's change matters more than the district average
The gap between value growth and tax growth comes from the tax reduction factor. A Legislative Service Commission analysis explains that when values rise, collections on voted levies are generally adjusted downward so taxing districts receive the same revenue they received the year before. The reduction cannot apply to unvoted inside millage or to certain other levies, such as fixed-sum school levies. It also stops at a 20-mill floor for school operating levies, so once a district reaches that floor, value growth can raise collections from those mills. The Auditor's Know Your Home Value guidance puts inside millage at no more than 10 mills, split among municipalities, the county, townships and schools.
Grandview's own rates show how large that adjustment is. On the Auditor's tax rate sheet for tax year 2025, the bills collected in 2026, the City of Grandview Heights carries 159.02 gross mills. After a residential reduction factor of 0.599342, the effective rate is 63.712709 mills. In other words, roughly 60% of the voted millage on paper never reaches a Grandview residential bill.
Because most voted levies are tied to a fixed revenue target, much of a district-wide value increase gets absorbed. What remains is the question of where your home lands compared with its neighbors. As NBC4 reported when values came out, the county describes this as a relationship that is not one-to-one. It depends on your value, how your property compares to others in the area, and the levies you pay. A Grandview home that rose 14% is moving with its district. A home that rose more than that carries a larger share of the same voted burden.
The inside millage now has its own limit. House Bill 335 requires county budget commissions to adjust inside-millage rates in a reappraisal or update year, so that revenue growth is generally held to GDP-deflator inflation over the prior three years. The LSC says this limit begins in tax year 2026. The law limits revenue. It does not limit the Auditor's appraisal of any single home.
The same city carries two different tax rates
A Grandview Heights mailing address doesn't settle the rate. The Auditor lists two taxing districts inside the city, and the 2025 rate sheet shows them side by side with nearby comparisons.
| Taxing district, tax year 2025 | Gross mills | Residential effective mills | City/village portion, mills |
|---|---|---|---|
| City of Grandview Heights | 159.02 | 63.712709 | 13.53 |
| Grandview Heights–Columbus CSD | 126.28 | 56.668295 | 13.53 |
| City of Upper Arlington | 150.04 | 63.556084 | 5.89 |
| City of Bexley | 156.77 | 63.420367 | 5.45 |
| City of Columbus | 115.89 | 49.775275 | 3.14 |
Two details from the sheet matter here. Grandview, Upper Arlington and Bexley end up within about three-tenths of a mill of each other on effective rates, even though their gross rates differ by nearly nine mills. And the city portion of Grandview's millage is more than double that of either neighbor. For a buyer, the parcel's district number on the Auditor's record is more useful than any citywide average.
The credit the last owner had may not carry over to you
The third factor is the change that will catch buyers off guard most often. House Bill 186 restructures Ohio's two residential rollbacks, credits that reduce tax on certain levies. According to the LSC final analysis, the 10% non-business rollback phases out for residential property, and the owner-occupancy rollback grows on this schedule:
| Tax year | Non-business rollback | Owner-occupancy rollback | Total for owner-occupied home |
|---|---|---|---|
| Prior law | 10% | 2.5% | 12.5% |
| 2026 | 7.5% | 5.70% | 13.2% |
| 2027 | 5% | 8.92% | 13.92% |
| 2028 | 2.5% | 12.15% | 14.65% |
| 2029 | 0% | 15.38% | 15.38% |
By 2029, a residence that serves as the owner's primary home gets the full 15.38%. Residential property leased to renters, or otherwise not the owner's primary residence, loses the rollback entirely. The changes apply starting in tax year 2026, so they first show up on bills paid in 2027. Official legislative records list March 20, 2026 as the effective date for these provisions.
A listing's tax history now reflects the seller's occupancy status as much as the home itself. Grandview's 2024 school bond adds a further layer. That November, voters saw it as Issue 37. It was a $69.525 million, 36-year bond estimated at 6.95 mills, or $243 a year per $100,000 of appraised value, according to the Board of Elections notice. WOSU reported about 61% approval, with the money going to a replacement Stevenson Elementary and improvements to the district's K–12 athletic complex. New and replacement levies approved in or after November 2013 are excluded from both rollbacks, so no rollback percentage reduces that bond.
The owner-occupancy credit isn't automatic for a new owner. The Auditor's DTE 105C application requires owning and occupying the home as your principal residence on January 1 of the tax year, limits each owner and spouse to one Ohio home, and sets a filing deadline of December 31. The form still describes a 2.5% reduction. The HB 186 schedule above is the newer statutory figure.
Where the value itself can be reviewed
The informal review period with Auditor appraisal staff is over. Meetings ended September 5, and document submissions closed September 12. The formal route is still open. The Board of Revision filing window runs from August 25, 2026, through March 31, 2027. Complaints can be filed online, by mail, by email or by fax, and the Auditor's filing instructions say the forms no longer need notarization. The Board of Revision hears complaints about appraised value, not tax dollars. Hearings are usually held on Zoom, and supporting evidence such as a closing statement, purchase contract or appraisal is encouraged.
That brings the three factors back together. A recent arm's-length purchase price is exactly the kind of evidence the board considers. And the Auditor's value is the starting point for comparing your home with the district average that drives the reduction-factor math.
A few distinct questions
Does a 14% average increase mean Grandview taxes rise 14%? No. The Auditor states that a change in appraised value does not produce an equal percentage change in taxes. Most voted levies are held to their prior revenue, with exceptions such as the school 20-mill floor, so a home's change compared with its district matters more than the average itself.
Is the +14% a Grandview neighborhood figure? It's an average for Grandview Heights City School District, which is how the Auditor tabulates the update. It's not a parcel-level or street-level estimate.
When do the new values and rollbacks show up on a bill? Both apply to tax year 2026. Ohio bills in arrears, so they appear on bills collected in 2027, after the Auditor certifies final values, which is expected by mid-December 2026.
If you're weighing a Grandview Heights home and want to compare its tax record with its district, its occupancy history and the 2026 value change before you write an offer, The Laumann Group can go through that record with you. You can also start with our Grandview neighborhood page or reach out to us directly. Let's Connect.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
