Indiana farmers opened their Form 11 notices this spring and found something worse than the usual creep: livestock barns, grain bins, machine sheds, and storage facilities reassessed at multiples of last year's value. Hoosier Ag Today reported in May that some agricultural buildings saw assessed values climb as much as 300 percent for the 2026 assessment — what the outlet called a "property tax shock" rippling through farm country.
This is not the farmland story. The 2026 farmland base rate of $2,120 per acre is its own pressure point, certified by the DLGF in its January 2, 2026 memo and covered in our farmland values outlook. This year's building spike is a separate mechanism with a separate appeal strategy — and the clock to act runs out in days, not months.
What actually happened: the cost tables caught up all at once
Indiana assesses agricultural buildings using the cost approach: reproduction cost from the state's cost schedules, minus depreciation. The Department of Local Government Finance publishes the construction cost tables that every county assessor plugs into that formula.
Here is the problem. According to reporting from Hoosier Ag Today and Inside INdiana Business, the 2026 tables are the first full revision since 2022, and the old tables were still built on pre-inflation 2021 construction data. Everything that happened to steel, concrete, lumber, and rural construction labor between 2021 and 2025 — the entire post-pandemic cost run-up — landed in a single update.
A grain system or confinement barn that was being costed at 2021 prices is suddenly costed at 2025-2026 prices. Four-plus years of construction inflation, applied in one assessment cycle, is how a building's assessed value doubles or triples without a nail being driven.
Note
The state has indicated it plans to update the cost schedules at least every other year going forward, which should prevent another multi-year cliff like this one. That is cold comfort for the 2026 bill, but it matters for planning: future revisions should be smaller, more frequent steps rather than one violent catch-up.
The relief conversation at the Statehouse
Indiana Farm Bureau and the Agribusiness Council of Indiana have begun discussions with lawmakers about relief. The headline idea on the table: lowering the circuit breaker cap on agricultural buildings from 3 percent to 2 percent of gross assessed value — which would align ag buildings with the 2 percent cap that already applies to agricultural land. Farm Bureau's Ryan Hoff put it plainly to Hoosier Ag Today: "The farm economy isn't great right now, and rising property taxes on ag buildings is certainly the last thing any of our members want to see."
Keep two things in mind about that conversation:
- Nothing has passed. Any cap change would need to move through a future legislative session, and the interim study committee process is the likely venue for hashing it out this summer and fall.
- A cap change would not fix a wrong assessment. The circuit breaker limits your bill as a percentage of assessed value; if the AV itself is inflated by a grade error or missing depreciation, the cap just limits how much an overstated value can cost you. The appeal is how you fix the value. Our circuit breaker explainer covers how the caps interact with AV.
The deadline: mid-June, and it is unforgiving
For most Indiana counties, the Form 130 appeal deadline for the 2026 assessment is June 15, 2026 — June 16 in some counties where Form 11 notices mailed later. The deadline is statutory. A day late is not "close"; it is out for the cycle, leaving only the harder refund-claim route.
If you missed the May 10 installment or are worried about paying on a disputed value, read our payment protection guide — filing the appeal is itself the shield, because a pending appeal lets you pay based on the prior year's assessment until it resolves.
Warning
File the Form 130 even if your evidence is not fully assembled. The form requires your parcel number, the assessment year (2026), your opinion of value, and a statutory ground — it does not require the full evidence binder on day one. Evidence is presented at the informal conference and PTABOA hearing months later. Do not let a half-finished comp analysis cost you the filing window.
Appeal angles specific to agricultural buildings
Ag buildings are appealed differently than houses. There is rarely a deep pool of comparable sales for a 40,000-bushel grain system, so the fight is usually inside the cost approach itself — the same math the assessor used, checked line by line. Pull your property record card first (the property lookup is the fast way) and work through these four angles.
1. Depreciation and effective age
Reproduction cost minus depreciation only works if the depreciation is right. Check the effective age and condition rating on the record card. A 1990s pole barn with original metal, rusting fasteners, and a settling floor should not carry the same percent-good factor as a five-year-old building. New cost tables raised the "cost new" side dramatically; if the depreciation side was not adjusted to match the building's actual condition, the net value is overstated twice over. Photograph rust, rot, foundation cracking, door and roof damage — physical deterioration is the easiest depreciation argument to document.
2. Functional and economic obsolescence
This is the strongest and most under-used ag argument. A building designed for an operation you no longer run is functionally obsolete even if it is structurally sound:
- A dairy parlor on a farm that exited milk
- Hog floors built for genetics and group sizes the industry left behind
- A flat-storage building that modern handling equipment cannot serve efficiently
- Low-clearance machine sheds that current equipment literally does not fit inside
Economic obsolescence — depressed commodity margins reducing what any operator would pay for specialized buildings — is also a recognized adjustment. The DLGF's own assessor training materials treat obsolescence as a standard component of the cost approach. Quantify it where you can: rental value of comparable storage, or the cost difference between your building and what you would actually build today.
3. Grade, classification, and measurement errors
The cost tables price buildings by type, grade, and dimensions. Errors here got more expensive this year because every input now multiplies against higher unit costs:
- Wrong building type — a basic pole structure costed as an engineered pre-fab building
- Wrong grade — one grade step commonly moves value 10-15 percent or more
- Wrong dimensions or features — square footage, sidewall height, grain bin capacity, heated vs. unheated, concrete vs. dirt floor
- Demolished or derelict structures still on the card — surprisingly common on farms with decades of building history
Our pole barn and outbuilding assessment guide walks through how these structures get classified in the first place.
4. Actual construction cost evidence
If you built recently, your invoices are evidence. Indiana assesses to market value-in-use, and a building completed in 2023 or 2024 with documented costs well below the new schedule's reproduction figure is a direct challenge to the table-driven number for that structure. Contractor quotes for equivalent new construction in your county serve the same purpose for older buildings. This will not always win by itself — schedules are presumed reasonable — but paired with a depreciation or obsolescence argument it anchors your opinion of value in something a PTABOA can act on.
How to file, in brief
- Pull the property record card for every parcel with buildings and verify type, grade, dimensions, age, and condition. Check it against your county's records.
- Download Form 130 from the DLGF forms page and file it with your county assessor by June 15 (June 16 where applicable) — one form per parcel.
- State a specific opinion of value for the improvements, grounded in corrected cost-approach math, actual construction costs, or both.
- Prepare for the informal conference 30-45 days out: photos, invoices, capacity documents, and a one-page summary of the corrections you are asking for. The general process from there follows the standard Indiana appeal path, and our comparable sales evidence guide covers what PTABOAs accept.
Tip
Appeal every affected parcel, not just the worst one. The cost table update hit every agricultural structure in the state, but errors compound differently on each building. A 300 percent jump is the headline; a quiet 60 percent jump on a functionally obsolete hog floor may be the easier win and real money at a 3 percent cap.
The bottom line
The 2026 ag building spike is a one-time collision between four years of construction inflation and a cost schedule that sat still since 2022. The legislature may eventually move the cap from 3 percent to 2 percent, and the state says future table updates will come at least every other year — but neither helps your 2026 bill. The Form 130, filed by mid-June with a cost-approach challenge built on depreciation, obsolescence, grade corrections, and actual costs, is the tool that does.