Use cases · Rentals and permits
Why does the state’s list disagree with ours?
The state’s rental registry, the listings on the booking sites and the town’s own permits each count rentals their own way, and none of the three was written to be compared with the others. ArtifexAI matches each listing and each registration to a home and sets it against the permit, and staff confirm every match before a letter goes out.
Each orange square is a state registration the town can now match to a home.

A house in Provincetown, Massachusetts · photograph from Pixel.la, CC0
To carry upstairs
One sentence for the manager, three for the Select Board
Massachusetts Department of Revenue, “What do we know about seasonal homes and short-term rentals,” July 2024; the state registry holds no per-property earnings and is not cleared when a home stops renting
In one town
Why the state counted about 1,500 rentals and the town about 1,000
A resident at a hearing asked why the state counted about 1,500 rentals and the town about 1,000. ArtifexAI matched the state’s registrations to homes and set them against the town’s permits that week. Most of the gap was entries the state never removes when a home stops renting or changes hands; the town found 78 homes renting with no permit, each with its listing beside the assessor’s card for staff to confirm.
Each square is one state registration; most land on a home with a permit, and a few on a home with none.
See the whole story of that hearing, and what has run every day since.
The rentals case study carries the question, what the record showed and the daily check that followed; a question sent from here goes to a founder, who reads it and replies.