OpenAVMKit
Automates mass appraisal workflows: enriches parcels with spatial data, builds valuation models via MRA, GWR, LightGBM, XGBoost, CatBoost, ensembles, generates IAAO-compatible reports, cleans data, and exports to GIS and CAMA formats.
An open-source toolkit for mass appraisal that automates the collection of spatial data, the deployment of automated valuation models, and the generation of statistical reports. It serves researchers, analysts, and government agencies, as well as developers and data teams. The toolkit is positioned as a free, transparent, and reproducible alternative to proprietary appraisal software, with a unified interface for multiple modeling algorithms and GIS export capabilities.
Key features
- Enrich data with public spatial variables
- Calculate distances to landmarks
- Deploy AVM algorithms via unified interface
- Ensemble multiple model results
- Generate IAAO-compatible ratio studies
- Break down reporting by criteria
- Detect anomalous sales
- Exclude invalid sales with rules
- Set up reproducible data pipeline
- Export to GIS-ready formats
- Export to CSV, Excel, Parquet
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GTM channels
- Community
- API
- Docs
ICP
- Data analytics teams
- Government public sector
- Software developers