From the 2024 to the 2025 assessment, the typical Indianapolis single-family home's assessed value rose 8.5%. The increase was concentrated on the east, west, and urban core. Warren Township had the fastest median growth at 12.5%, followed by Center (11.6%) and Wayne (11.2%). Decatur Township was slowest at 1.8%. These are medians computed across 241,275 single-family parcels that appear in both years of state assessment data. The 2025 assessment is the one behind the property tax bills Marion County owners are paying in 2026.
The pattern also has a dollar side. The townships that grew fastest in percentage terms are mostly the ones that started with the lowest values. Center Township's median single-family assessment went from $107,300 to $122,400. Washington Township's went from $264,600 to $290,000.
How we measured Marion County assessment growth
AribaTax loads the state's parcel-level assessment files into its own database, and every figure in this post comes from queries against that database. The two years compared:
- 2024 assessment (pay 2025): Indiana Gateway real property file, published by the DLGF and labeled "2024 pay 2025" on the Gateway download page.
- 2025 assessment (pay 2026): the 2025 real property file from Indiana GIO's Data Harvest.
Indiana's assessment date has been January 1 since 2016 (IC 6-1.1-2-1.5), so these are values as of January 1, 2024 and January 1, 2025.
We kept only parcels classed 510 (one-family dwelling on a platted lot) in both years with a positive total AV in both. That excludes vacant lots, condos, two-family homes, and anything reclassified between years, so we compare the same kind of house to itself. We also checked the two files against each other. The 2025 file carries each parcel's prior-year AV, and for 99.81% of Marion County class-510 parcels (242,156 of 242,628), that prior value matches the Gateway 2024 figure exactly.
Note
We report medians, not averages. A few new builds or demolitions can drag an average far from what a typical owner experienced. The "median change per home" column is the middle of every parcel's own percentage change. The "change in median AV" column compares the typical home's value in each year. When the two columns differ, growth was uneven inside that township.
Marion County residential AV growth by township
| Township | Parcels | Median AV 2024 | Median AV 2025 | Change in median AV | Median change per home | Share of homes that rose |
|---|---|---|---|---|---|---|
| Warren | 28,312 | $162,400 | $184,900 | +13.9% | +12.5% | 88.2% |
| Center | 43,370 | $107,300 | $122,400 | +14.1% | +11.6% | 89.6% |
| Wayne | 33,936 | $147,700 | $169,300 | +14.6% | +11.2% | 88.7% |
| Washington | 33,675 | $264,600 | $290,000 | +9.6% | +9.1% | 90.7% |
| Pike | 16,960 | $241,400 | $256,900 | +6.4% | +7.8% | 81.9% |
| Lawrence | 30,886 | $245,700 | $263,600 | +7.3% | +6.2% | 73.8% |
| Franklin | 18,615 | $268,700 | $285,400 | +6.2% | +5.6% | 85.1% |
| Perry | 26,453 | $224,900 | $238,400 | +6.0% | +4.3% | 83.4% |
| Decatur | 9,068 | $214,500 | $218,500 | +1.9% | +1.8% | 64.0% |
| All Marion County | 241,275 | $205,500 | $221,900 | +8.0% | +8.5% | 84.9% |
The countywide median hides a split. In Warren, Center, Wayne, and Washington, roughly nine in ten homes went up. In Decatur, only 64.0% rose and 35.6% fell. Lawrence also had a large share of decreases: 26.1% of its single-family homes were assessed lower in 2025 than in 2024. Township still decides your rate stack and taxing district. It no longer decides who assesses you, because one county assessor values all nine townships under a single model.
The ZIP codes that moved most and least
ZIP codes cross township lines, so each ZIP below is labeled with the township where most of its matched parcels sit. We included only ZIPs with at least 500 matched single-family parcels.
| ZIP | Main township | Parcels | Median AV 2024 | Median AV 2025 | Median change per home |
|---|---|---|---|---|---|
| 46222 | Wayne | 10,079 | $95,600 | $112,300 | +20.8% |
| 46218 | Center | 11,232 | $74,900 | $88,600 | +17.6% |
| 46201 | Center | 9,588 | $117,300 | $135,700 | +13.3% |
| 46226 | Lawrence | 11,251 | $120,500 | $138,500 | +12.7% |
| 46224 | Wayne | 6,624 | $170,800 | $194,400 | +12.0% |
| 46256 | Lawrence | 6,056 | $311,200 | $321,900 | +2.4% |
| 46113 | Decatur | 2,311 | $253,500 | $260,800 | 0.0% |
Near-westside 46222 and near-eastside 46218 stand out. The typical home's assessment in each rose by close to a fifth, from some of the lowest starting values in the county. At the other end, 46113 in southwest Decatur split almost evenly: 49.4% of homes rose and 49.7% fell.
The growth was in the house, not the land
Separating land from improvements gives a clear answer. Among matched single-family parcels, 99.7% had the same land AV in 2025 as in 2024, and the median land change was 0.0% in every township. The median improvement change was +9.8% countywide, ranging from +14.4% in Warren to +1.9% in Decatur.
That matches how annual trending works. Under IC 6-1.1-4-4.5, the assessor must use mass appraisal to update values every year between reassessments, and the DLGF must review and certify each annual adjustment. If your 2026 notice showed a land jump, that happened in a different year from the 2024-to-2025 movement measured here. Our neighborhood land value guide explains how to read that line.
Warning
A higher assessment does not raise your bill by the same percentage. Homestead taxes are capped at 1% of gross AV (IC 6-1.1-20.6), rates change every year (see the 2026 Marion certified rates), and deductions and credits come off first. Still, a home trended up faster than its neighbors carries a larger share of the levy. That is the uniformity question a COD analysis measures.
What to do with these numbers
- Compare your parcel to your township's median change per home. If your home rose well above it, pull your property record card and check grade, condition, and square footage for errors.
- Read the land and improvement lines separately. In 2025, almost all single-family movement was on the improvement side.
- Check your number against the market. Our mid-2026 Indianapolis housing market review covers what recent sales mean for 2027 values.
- Know your windows. The fall 2026 installment is due November 10, 2026. Objective errors on a past assessment may still be fixable through the correction-of-error route, and the next appeal cycle starts with the Form 11 notices. Review Marion County appeal odds before you file.
To see your own parcel's 2024 and 2025 values next to your neighbors', use Property Lookup. To run this township or ZIP analysis on your own portfolio or service area, the AribaTax Data API exposes the same parcel-level assessment records used here.
Source: Indiana Gateway real property data (2024 pay 2025) and Indiana Data Harvest real property data (2025 pay 2026), compiled and analyzed by AribaTax. Single-family class 510 parcels in Marion County present in both years.