The moment usually comes near the end of closing, after the inspection contingencies are resolved and the wire has cleared escrow. Someone slides across the Indiana Sales Disclosure Form, which asks whether this property will be the buyer's primary residence. For a lot of buyers closing on a dune lot or a shoreline cottage in Dune Acres, the honest answer is no. And that one checkbox is the moment their property tax bill quietly switches from one set of rules to a much less forgiving one.
Most people who have researched Indiana real estate taxes know the headline number: according to Property Tax Rates, a 1% cap applies to owner-occupied primary residences. What fewer people realize, until they own a house here, is that the 1% cap is reserved for owner-occupied primary residences only. A second home, a weekend place, a lake house you visit on holidays and let sit quiet the rest of the year, is capped at 2%. Not a rounding difference. Double.
Why This Math Matters More in This Particular Town
Dune Acres isn't a random data point in this conversation. The town's own materials describe a community with a genuine mix of year-round residents and owners who treat the house as a second home, used primarily on weekends and through the summer months. That's not incidental to the tax question. It's central to it. In a town built this way, the assumption that "Indiana caps my property tax at 1%" is wrong for a meaningful share of the housing stock, and the buyers most likely to make that assumption are exactly the ones drawn to a private, wooded, lakefront community an hour from Chicago.
The market here is also thin enough that a single closing can move the story. The most recent specific figure published for the town placed a median sale price near $1.11 million for December 2024, and even that reporting cautioned that the sample size is small enough for one lakefront sale to swing the number substantially. Nearly two years later, that same thinness is still the defining feature of the market, and it cuts both ways for tax purposes too. Assessed value, not sale price, is what the state actually taxes, and Porter County's own assessors work from that lower, separately calculated figure rather than whatever number closed on the deed. A buyer comparing what they paid to what they'll owe needs to keep those two numbers straight from day one.
The Cap Everyone Quotes Is One of Three
Indiana's constitution sets three different caps, not one, and which one applies to your house depends entirely on how you use it.
| Property classification | Tax cap | Who this covers |
|---|---|---|
| Homestead (owner-occupied primary residence) | 1% of gross assessed value | Full-time residents who file the homestead deduction |
| Other residential and agricultural | 2% of gross assessed value | Second homes, vacation homes, rental residential, farmland |
| Non-residential and long-term care | 3% of gross assessed value | Commercial, industrial, vacant land |
Porter County's own homestead deduction page lays out the mechanics behind that 1% category: a standard deduction and a supplemental deduction calculated on what's left. Strip both deductions out, the way a non-homestead property does, and there's simply more assessed value left exposed to that higher 2% ceiling.
Run the arithmetic on a plausible Dune Acres property, a dune-lot house with a gross assessed value of $600,000, a modest figure relative to what these lots actually sell for, since assessed value in Indiana routinely lags market price. The gap isn't a footnote. It's the single biggest tax-planning variable a second-home buyer in this town will face, and it has nothing to do with the negotiated purchase price.
What 2026 Actually Changes, and What It Doesn't
Indiana passed a significant overhaul last year, Senate Enrolled Act 1, signed by Governor Mike Braun in April 2025, and 2026 is the first year its effects start showing up, according to Propcash. It's tempting to read the coverage of that law as blanket relief for Indiana homeowners. The truth is more specific, and more interesting for anyone weighing a second home purchase here.
The Indiana Department of Local Government Finance says homestead properties get a new 10% credit on the tax bill, capped at $300, applied automatically with no separate application required. They also get a gradual shift away from the old flat $48,000 standard deduction toward a larger percentage-based supplemental deduction, a change that phases in through 2031.
Non-homestead residential properties, the category that covers most second homes in Dune Acres, get relief too, just built differently. A new deduction for properties sitting under the 2% cap starts at 6% of assessed value for the 2026 tax year and climbs to 33.4% by 2031. That is a real number and a real benefit. It is also smaller in year one, slower to compound, and stacked on top of a cap that started at double the homestead rate to begin with. The Indiana Capital Chronicle noted this is essentially the first meaningful deduction that non-homestead property owners have received under the current tax cap system, which is true and also underscores how little relief existed for that category before now.
Some of this is already showing up, some isn't yet. The 10% homestead credit applies to taxes first due and payable in 2026, so a full-time resident with a homestead deduction on file may already see it on the bill mailed this spring. That credit is written into the law as a homestead benefit specifically, so it does nothing for a second home.
The Filing Step Buyers and Sellers Both Miss
Two mechanical details matter more here than the tax rate itself.
First, the Sales Disclosure Form's primary-residence question is worth reviewing. If a Dune Acres property changes hands, its homestead status is worth checking as part of the transaction.
Second, if a second home in Dune Acres ever becomes someone's primary residence, whether through retirement, a move, or a change in how the family uses the property, the homestead deduction application has to be filed with the Porter County Auditor's office. Porter County also runs a homestead compliance program specifically designed to catch deductions claimed on properties that don't qualify, and a taxpayer found ineligible can face corrected bills and penalties. That is not a program to test.
One more detail worth keeping on file: if an assessed value looks wrong, and in a market this thin with comparable sales this scarce, that happens, the appeal process is worth knowing about.
A Few Questions Worth Asking Before You Write an Offer
Does the 1% cap ever apply to a second home in Dune Acres? Only if the property is your owner-occupied primary residence and you've filed the homestead deduction. A vacation or weekend home, no matter how much time the family actually spends there, falls under the 2% category unless residency status changes and gets filed with the county.
If I split time between Chicago and Dune Acres, which one counts? For the homestead deduction, the key question is which home is your primary residence.
Will the 2026 law lower my bill this year? It depends which category the property falls in. A homestead may already carry the new 10% credit on the bill mailed this spring. The size of any benefit depends heavily on whether the property is homestead or non-homestead.
Property tax mechanics rarely show up in a listing description, and they rarely come up until the first bill lands in a new owner's mailbox. For a second-home buyer weighing a dune lot against a similar house somewhere with simpler tax rules, this is exactly the kind of detail that belongs in the conversation before an offer goes in, not after.
If you're weighing a purchase in Dune Acres and want to understand what a specific property's tax picture actually looks like, both today and under the phased changes ahead, Mark Hull can walk through the numbers with you. Book a complimentary consultation before you write the offer, not after the first bill arrives.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
