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Product · cobuy.io/suitability-score

CoBuy Suitability Score™

Industry first Live Real estate2018, rebuilt 2026

A proprietary algorithm that scores any home for co-ownership, and a service that delivers the score to the agent listing it.

ProofValidated across 3,777 test pairs. Cited in MLS listing remarks.

The CoBuy Suitability Score grade scale from A to F, under the line "Most American homes flunk co-ownership"

My role

Designed the model. Supplied and reconciled the calibration judgments. Directed the adversarial testing. Turned the engine into a delivered service.

Results

  • A listing brokerage put the score in its MLS remarks. It showed up on Redfin and Zillow the same day.
  • Our page for a scored listing ranked on page one for the address within a day.
  • A broker scored his own $3.85M listing, published the scoresheet, and gave us a segment on his show.

What it is

Homes get built and sold for one household. Put two or three households in one and most of them fail: one kitchen, one entrance, one primary suite, nowhere to park.

The CoBuy Suitability Score™ grades a home on how well it works for people who’ll own it together. Agents send us a listing. We score it and hand back the grade, the reasons and the marketing materials.

It gives a co-buying group a fast answer to “would this work for us?” and gives the agent a reason to call us.

Screens

The score’s five bands, from highly suitable to below 60
5 bands. Most homes land in the bottom two.
A panel titled The math of sharing, showing a home’s monthly cost and cash to close per person for two, three or four co-buyers
Each scored home shows the math of sharing it. Monthly cost and cash to close, per person, for 2, 3 or 4 co-buyers.
More proof
  • 3,777 test pairs, zero violations.
  • The engine was locked after a 4-seat adversarial review.
  • Each score ships with an explanation, a scoresheet, a public listing page and a marketing kit for the agent.

Related work

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