Free, open tools for land policy

Everything we build is free to use and open source, so any analyst, assessor, or official can do the work without waiting on us.

Data

Where land value tax legislation is enacted, moving, or emerging — state by state.

Open-source tool

An open-source toolkit for modeling a revenue-neutral land value tax shift in any U.S. city, parcel by parcel.

Map

Your city's land, in 3D: where land value concentrates, and how much sits idle under vacant lots and surface parking. 25 cities across 14 states.

Open-source tool

A free, open-source mass appraisal toolkit for assessors, researchers and analysts: enrich data, run AVMs, and produce IAAO-style ratio studies.

All tools