Benton County · Siloam Springs
Siloam Springs is far enough west that its market moves on its own. A countywide reappraisal does not always notice that.

2026 Appeal Deadline
August 17, 2026
Filed with the Benton County board in Bentonville. Petitions close at 4:30 p.m.
File with: Benton County Board of Equalization
Siloam Springs sits on the Oklahoma line, about 30 miles west of the Bentonville and Rogers corridor that drives Benton County's numbers. It has its own school district, its own millage, and a housing stock that skews older than the county average, including a substantial stretch of historic homes near downtown. The county reappraised everything in 2024 and put the countywide increase at 66 to 67 percent. Whether Siloam Springs moved that much on your street is a question worth asking, because that value now holds until 2028.
County
Benton County
Board deadline
August 17, 2026
School district
Siloam Springs
Assessed at
20% of market value
Last reappraisal
2024
Filing fee
$0
The older neighborhoods around downtown and the university are where the strongest cases usually sit. Historic homes vary enormously in what has actually been done to them, and a county record cannot tell an updated interior from an original one. Two houses of the same footprint and year can be decades apart in condition and still land within a few thousand dollars of each other on the assessment roll. That is the gap to document.
Verify what the county thinks you own
Look up your parcel and read the record. On older Siloam Springs homes, watch for unheated additions counted as living area, attic space listed as finished, and outbuildings valued as if they were sound.
Build the condition file
Knob and tube wiring, original plumbing, foundation settling, a roof past its life, and unabated moisture all reduce market value and none of them show from the curb. Photograph each one with a date and get written repair estimates where you can.
Use local sales, not county averages
The county's reappraisal figure describes Benton County as a whole, and the western side of the county does not price the same as the Bentonville corridor. Sales within Siloam Springs are the relevant evidence for a Siloam Springs house.
Pull comparable assessments
Benton County points owners toward similar nearby properties assessed for less. Property record cards are public. Print the ones that support you and bring them to the review.
Informal review, then the board
The assessor opens informal reviews in late July. It is a drive to Bentonville or a phone call. If it does not resolve, petition the Board of Equalization before the August deadline. You can do it by letter or through an agent, and the decision comes in writing within 10 business days.