Jefferson County: Madison's Historic District Meets 2026 Reassessment

Jefferson County is centered on Madison — a city of roughly 12,000 perched on the north bank of the Ohio River, with a 133-block National Historic Landmark District that gives the county a property tax profile unlike anywhere else in Indiana. The historic district concentrates 19th-century Federal, Greek Revival, and Italianate architecture in a way that creates assessment classification questions every cycle. For 2026, Jefferson County property owners face the same statewide assessment dynamic — a DLGF cost-table reset and SB 1 property tax reform — applied to a market where preservation, river frontage, and small-town tourism shape every Form 11 notice.

Jefferson County's Treasurer's Tax List was last updated April 6, 2026. Form 11 notices mail in late April. Form 130 appeals are due June 15, 2026, or 45 days after the mailing date.

Madison's National Historic Landmark District covers 133 blocks — among the largest contiguous historic districts in the Midwest. For owners of contributing structures, the historic designation can affect insurability, financing, and the practical replacement-cost basis used in assessment.

Why Historic District Property Is a Distinct Assessment Question

Madison's historic district creates assessment dynamics that don't appear in non-historic markets:

1. Replacement Cost vs Restoration Cost

The DLGF cost tables reflect modern construction methods. A 19th-century Federal-style home cannot be replicated using modern cost factors — the actual restoration cost using period-appropriate materials and techniques is substantially higher than the modern construction cost. But in either direction, the assessor's mass-appraisal model is calibrated to typical construction, not to historic restoration.

2. Functional Adaptation

Many Madison historic district properties have been adapted for residential, commercial, or mixed use. A Greek Revival home converted to a bed-and-breakfast carries different cap-tier exposure than the same home in single-family use. Verify the property class code on your record card matches the actual use.

3. River-Frontage Premium

Ohio River frontage and river-view parcels carry land valuation premiums not driven by construction cost. The land influence factor on the record card should reflect actual frontage or view; a parcel with documented blocked view or limited access deserves an adjustment.

Statewide 2026 Changes Applied to Jefferson County

Change	Effect on Jefferson County owners
SB 1 supplemental homestead credit (10%, max $300)	Direct $300 reduction on most owner-occupied bills
Supplemental homestead deduction 35% to 40%	Lower taxable AV on owner-occupied parcels
Business personal property exemption $1M (2026), $2M (2027)	Many small Madison businesses now exempt
DLGF cost-table reset	Material AV growth on improved parcels
1%/2%/3% caps unchanged	Cap-bound parcels insulated from rate movement

Madison's combined property tax structure also includes an Innkeeper's Tax of 11% for short-term lodging — a separate tax from property tax but a relevant data point for owners considering bed-and-breakfast or short-term rental use.

What to Verify on Your 2026 Jefferson County Form 11

The five-step statewide Form 11 walkthrough applies. Jefferson-specific items:

1. Historic District Status

If your property is in the historic district, the record card should reflect that. The historic designation does not by itself reduce AV, but it constrains the practical replacement methodology and supports condition-based appeal arguments.

2. Improvement Class and Effective Age

For 19th-century structures, the effective age on the record card should reflect actual condition, not the 150+ year actual age. A well-maintained historic home may carry a younger effective age (lower depreciation); an unrenovated structure should carry full economic depreciation.

3. Use Classification

A historic home in single-family residential use, in bed-and-breakfast use, in mixed commercial-residential use, and in short-term rental use each carry different cap-tier exposure. Verify the use coding matches the actual use.

4. Land Influence Factors

For river-frontage and river-view parcels, the influence factor on the land record drives the AV. Verify the factor reflects actual conditions.

5. Homestead Filing

Confirm the homestead deduction, supplemental homestead deduction (40% in 2026), and SB 1 supplemental credit are all applied to owner-occupied parcels. For homes purchased in 2025, the HC-10 filing is essential.

When an Appeal Is Worth Filing in Jefferson County

A practical filter for Madison and the surrounding county:

Historic district properties with documented condition issues: file with photos and (if available) preservation assessments
Use classification mismatches: correct before the issue compounds
River-frontage influence factor errors: file with documentation of actual frontage or view
Recently purchased parcels where AV exceeds purchase price: file with closing statement
Commercial parcels with documented vacancy or below-market rents: file with income evidence

Tax Appeal Automation generates the Form 130 + evidence package for parcels where the data supports a reduction.

Jefferson County Tax Calendar

Date	Action
January 1, 2026	Assessment date
Late April 2026	Form 11 notice mailing window
May 10, 2026	Spring 2026 tax installment due
June 15, 2026	Form 130 appeal deadline (or 45 days after mailing)
November 10, 2026	Fall 2026 tax installment due

Filing Logistics

Form 130 appeals in Jefferson County are filed with the County Assessor's Office. The Jefferson County Treasurer can be reached at 812-265-8910. The County Assessor processes the petition, attempts informal resolution where the evidence supports it, and refers unresolved cases to the Jefferson County PTABOA.

After filing:

30-day acknowledgment from the County Assessor
30–90 day informal contact where written evidence supports settlement
3–6 month hearing in front of the PTABOA if no settlement
30-day post-decision window to escalate to the Indiana Board of Tax Review

The Long-Term Picture for Jefferson County Owners

Madison's historic district status creates a property tax environment where parcel-level nuance matters more than in typical markets. The SB 1 changes deliver meaningful homestead relief on the spring 2026 bill, but the underlying AV question on a historic district property requires careful attention to use classification, effective age, and land influence factors.

For investors evaluating Madison rental property, the combination of tourism-driven demand, the Innkeeper's Tax structure, and the historic district overlay produces a more complex underwriting question than in typical Indiana counties.