Mass Appraisal in Minutes,
Not Months
Run IAAO-compliant ratio studies with automated statistics, ML-powered clustering, and transparent valuations. From raw data to certified values — no installations required.
< 5 min
Pipeline runtime
IAAO
Compliant statistics
100%
Browser-based
256-bit
Encryption
How It Works
Four Steps. Under Five Minutes.
From raw CSV files to a fully compliant ratio study report — no installations, no manual data wrangling.
What's inside
The Factor Workspace, in one view.
Tune Land + Improvement factors per neighborhood. Watch Median Ratio, COD, PRD, and Total Change move in real time. Save versions for audit.
Cuyahoga County · Triennial 2026
Ohio Triennial · 84,023 parcels · last run 4 min ago
Median Ratio
0.95
target 0.95
COD
11.4
IAAO ≤ 15
PRD
1.01
0.98 – 1.03
PRB
-0.02
±0.05
Total Change
+5.8%
vs last
What Assessors Say
Trusted by Appraisal Professionals
Hear from assessment offices that switched to M.A.P.S.
“MAPS cut our ratio study turnaround from two weeks to under an hour. The automated IAAO statistics alone saved us hundreds of hours per cycle.”
Sarah Mitchell
Chief Appraiser, County Assessor's Office
“Our COD dropped below 10 for the first time after switching to ML-powered clustering. The data segmentation is leagues ahead of what we had.”
James Rodriguez
Assessment Director, Municipal Assessment Dept.
“What-if simulations let us test factor changes before committing — a game changer for our board presentations and taxpayer appeals.”
Karen Olson
Property Tax Analyst, State Revenue Office
Your Next Ratio Study Could
Take 2 Minutes
Join the assessor offices that trust M.A.P.S for accurate, transparent, and defensible mass appraisals.