Immodex

Problem solved

On Leboncoin, Bienici and SeLoger, the exact address of a real-estate listing is deliberately hidden to push you toward the agency. Yet the data shown on the listing — surface area, DPE and GES ratings, postal code, land area — is enough to identify the property in the public registries. Doing that cross-reference by hand is tedious.

Value proposition

Open a listing on any of the three sites, click the Immodex button, and the extension recovers the exact address. For a dwelling, it queries the ADEME national DPE registry and cross-references the energy class, greenhouse-gas class, surface and postal code. For a parcel of land, it queries the IGN cadastre and locates the parcel on the aerial photo. One to five candidate addresses are returned, ranked by a confidence score.

Target Audience

Real-estate investors, buyers, property hunters and industry professionals who want to verify the exact location of a property before any commercial contact.

Business model

Free, open source under the MIT license. No account, no tracking, no hidden affiliation. The extension only calls public APIs from the French government (data.gouv.fr, data.ademe.fr).

Tech Stack

• Chrome extension, Manifest V3, vanilla JavaScript, no build step
• GitHub Actions CI/CD: release-please and automated Chrome Web Store publishing
• Public data sources: ADEME DPE registry, IGN cadastre (apicarto), French national address database (BAN), Etalab Géo API

Status

Live on the Chrome Web Store. Source code: github.com/tonoid/immodex.

Privacy

No personal data is collected. No account, no tracking, no cookies. The only outbound requests go to public APIs operated by the French government (ADEME, IGN, BAN, Etalab).

Full details: Immodex privacy policy.