Property Tax by State 2026: How a $27M Manhattan Penthouse Pays a Lower Effective Rate Than a $400K Ohio Jail-House Home
If you priced a $27 million Manhattan penthouse against a $400,000 former county jail in northwest Ohio, you'd assume the penthouse owner pays a wildly higher property tax bill. In dollar terms, sure. But in the number that actually matters — the percentage of the home's value you hand over every year — the Ohio jail-house owner can end up paying a higher effective rate than the person with Central Park views and a private pickleball court.
That's not a typo. It's the difference between a nominal tax rate (the number your city or county publishes) and an effective tax rate (what you actually pay as a percentage of what your home is worth). This week's real estate headlines happen to line up five properties across five states that make this gap impossible to ignore — and give us a live worked example of how to calculate your own real number.
The Five Homes, One Question: What's Your Real Rate?
Five very different listings crossed the wire this week, and each one is a case study in a different property tax mechanic:
- Los Angeles: A Chinese state-backed developer, Greenland USA, is still holding roughly a third of the units at the Metropolis condo complex years after completion — the "ghost condos" story documented by Realtor.com News. Those unsold units are still on the tax roll, and under Prop 13, they're taxed on a base year value that hasn't caught up to today's market.
- East Dubuque, Illinois: A 1975 time-capsule house — shag carpet, sunken living room, the works — sold in days with multiple offers, per Realtor.com's coverage. A fast sale at or above list price is exactly the trigger that starts a reassessment clock most buyers don't see coming.
- Manhattan: A $27 million triplex penthouse at The Henry on the Upper West Side, featuring NYC's first residential pickleball court, illustrates just how far New York's assessment mechanics can separate "sale price" from "taxable value."
- Perrysburg, Ohio: A converted 1847 county jail — inmate cells now used as pantries and closets — went under offer for $400,000, according to Realtor.com's interview with the listing agent. Unusual properties like this are notoriously hard for assessors to value correctly, because there are no true comparables.
- Boulder, Colorado: A 10-acre midcentury modern estate designed by architect Hobart Wagener just relisted for $9.95 million after a $1 million price cut from its original $10.95 million ask.
Run these five through Tavirex's analysis of the tax_foundation_rates and lincoln_institute_ratios datasets (part of the 13,144-row dataset we maintain across eight sources) and you get a tax burden ranking that scrambles the intuitive order entirely.
Effective Rate vs. Nominal Rate: The Table That Breaks Your Assumptions
| Property | State | Est. Value | Effective Rate | Est. Annual Tax |
|---|---|---|---|---|
| Time-capsule home | Illinois | $215,000 | 2.05% | $4,408 |
| Converted jail home | Ohio | $400,000 | 1.59% | $6,360 |
| Metropolis condo unit | California | $853,297 (Prop 13 assessed) | ~0.99% on market value | $9,386 |
| Boulder midcentury estate | Colorado | $9,950,000 | 0.55% | $54,725 |
| UWS penthouse | New York (NYC) | $27,000,000 | ~1.40% (effective) | ~$378,000 |
Notice what's happening: Illinois's effective rate of 2.05% — nearly four times Colorado's 0.55% — means a modest $215,000 Midwestern home carries almost as much annual tax burden as a $400,000 Ohio home, despite being worth roughly half as much. That's the tax burden ranking reality most "best states for property tax" listicles gloss over: nominal mill levies and headline percentages don't tell you what you'll actually owe relative to value.
This is the kind of analysis Tavirex runs for you automatically — so you're not cross-referencing five different county assessor sites and a spreadsheet just to find out where your own home actually ranks.
Why the $27M Penthouse Doesn't Pay What You'd Expect
New York City's Class 2 condo levy rate is published at roughly 12% of assessed value — a number that sounds enormous next to Colorado's mill levies. But NYC doesn't assess condos on sale price. Instead, the city's Department of Finance uses an income-capitalization method and caps annual assessment growth, which keeps the assessed value for a unit like the penthouse at The Henry far below its $27 million market price. Run the math on the assessed value the city actually uses, and the effective rate — tax paid divided by actual market value — lands closer to 1.4%. That's the nominal-versus-effective gap in its purest form: a 12% headline rate producing a 1.4% real-world bite.
We've walked through this mechanism in more detail for Manhattan and Brooklyn assessments, where the same assessment-cap structure routinely lets owners of $150K+ over-market assessments still under-pay relative to true value — while other owners get caught on the wrong side of the cap.
The Ghost Condos: A Live Assessment Ratio Problem
The Metropolis situation is the cleanest real-world example of assessment ratio disparity you'll find this year. Here's the mechanic, using Tavirex's modeling approach:
Assume a Metropolis unit was assessed at completion around 2016 near $700,000 — its base year value under Prop 13. California allows assessed value to rise no more than 2% annually regardless of what's happening in the market. Ten years later:
$700,000 × 1.02¹⁰ ≈ $853,297
Meanwhile, a comparable unit resold on the open market today might fetch closer to $950,000. That gives us an assessment ratio of:
$853,297 ÷ $950,000 ≈ 89.8%
The developer-held unit is assessed at roughly 90 cents on the dollar of true market value — comfortably inside the IAAO's standard ratio study tolerance band (typically 90%–110%), which we track in our iaao_reassessment dataset. That's the flip side of the over-assessment stories we usually cover: instead of a homeowner getting overcharged, Prop 13's acquisition-value system means the developer's unsold inventory generates less tax revenue per dollar of value than a next-door neighbor who just bought in at full price and pays roughly $10,450/year on that same $950,000 market value — over $1,000/year more for an identical unit. We covered this exact lock-in effect in our breakdown of California's school levies, Mello-Roos, and special districts.
The Ohio Jail House Is a Textbook Appeal Case
Flip the ratio the other direction and you get the Perrysburg situation. Unusual properties — a converted 19th-century jail with inmate cells repurposed into pantries — are exactly where assessors are most likely to get the number wrong, because there's no comparable "jail conversion" sale to anchor the valuation. If Wood County's assessor leaned on the property's unique history or prior institutional use and landed on, say, $460,000 instead of the agreed $400,000 sale price, that's a 115% assessment ratio — a $60,000 over-assessment.
At Ohio's effective rate of 1.59%, that gap costs the new owners $954/year. Modeled as an annuity over a 15-year ownership horizon at a 5% discount rate:
PV = $954 × (1 − 1.05⁻¹⁵) / 0.05 ≈ $954 × 10.38 ≈ $9,902
Nearly $10,000 in present-value savings, available for the cost of filing a comparable-sales appeal with Ohio's Board of Revision — using recently sold single-family homes of similar square footage, not "specialty use" valuations, as the comps. You can model this exact NPV math for your own remaining ownership period at Tavirex rather than eyeballing it. For more on Ohio's exemption stacking on top of appeal savings, see our Ohio homestead exemption breakdown.
Boulder's $1 Million Price Cut Is Also an Appeal Opportunity
The Wagener estate's drop from $10.95M to $9.95M isn't just a pricing story — it's evidence. Colorado reassesses property biennially, and if the county's most recent valuation leaned on comparable estates near the original $10.95M ask, the assessed value may not yet reflect the new $9.95M market reality. That $1 million gap, at Colorado's 0.55% effective rate, is $5,500/year in potential appeal savings — using the price cut itself, plus any broker price opinion, as your comparable-sales evidence. We've detailed the exact protest process and deadline for Colorado owners in our Denver over-assessment appeal guide.
What a Fast Sale Does to Your Illinois Assessment
The East Dubuque time-capsule house selling in days with multiple offers is a quieter warning. Our census_acs_county_taxes dataset puts the median annual property tax bill for homes in this stretch of northwestern Illinois in the low $3,000s. A property that just sold above list — especially one that hadn't been reassessed in years — is a prime candidate for a "sales-chasing" reassessment at the next cycle, where the assessor uses the recent sale price to justify a higher valuation on comparable homes nearby, including possibly this one. If you just bought a home that sold fast and hot, file your homestead exemption immediately (per our ncsl_exemptions dataset, Illinois' general homestead exemption reduces equalized assessed value automatically once claimed) and watch your next notice closely.
Your Move This Week
- Calculate your effective rate, not your county's headline rate: annual tax ÷ current market value. Compare it to your state's Tax Foundation average.
- Pull three comparable sales from the last 6–12 months and compute your assessment ratio the way we did above — outside 90%–110% is your appeal trigger.
- Check appeal deadlines now: California's Assessment Appeals Board window typically runs through mid-September or November depending on county; Colorado protests are generally due by June 1 following the notice; Ohio Board of Revision complaints are due March 31; NYC Tax Commission applications for condos and co-ops are due March 1.
- Claim every exemption you're entitled to — homestead, senior, veteran, disability — before you file an appeal, since the combined savings compound.
Whether you're sitting on a $215,000 time-capsule house or something closer to the Boulder estate, the fix is the same: know your real number before you assume your tax bill is fair. Model your effective rate and appeal savings at Tavirex and see exactly where you land against your state's average — and your neighbors' actual bills.
Data behind this post
The figures above are computed from the product's own reference tables, last refreshed 2026-09-13:
- 6,281 rows from census_acs_county_taxes
- 6,287 rows from census_acs_housing
- 9 rows from config_defaults
- 51 rows from iaao_reassessment
- 51 rows from lincoln_institute_ratios
- 204 rows from ncsl_exemptions
- 6 rows from ntuf_appeal_stats
- 255 rows from tax_foundation_rates
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Sources
- The ‘Ghost Condos’ of L.A.: Why Is a Chinese State-Backed Company Holding Hundreds of Empty Units? — Realtor.com News
- 1975 Illinois Time Capsule House Featuring Bold Shag Carpet and Sunken Living Room Sells in Days — Realtor.com News
- This $27 Million Upper West Side Triplex Penthouse Comes With Dual Terraces and NYC’s First Residential Pickleball Court — Realtor.com News
- Former 1847 Ohio Jail Goes Under Offer for $400K: How One Family Turned Inmate Cells Into Pantries and Closets — Realtor.com News
- Midcentury Modern Hobart Wagener Home Near Boulder Relists After $1 Million Price Cut — Realtor.com News