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Good practice

Foncier Innovant — France's AI detection of undeclared property

France · Paris · See the France profile

France's tax authority scans aerial imagery with AI to find undeclared pools and extensions. In 2023 it flagged ~140,000 unreported pools, yielding about €40M in extra property tax, with expansion to other structures planned.

20,000+
Undeclared pools detected, initial wave
10 million EUR
Additional tax revenue, initial wave
140,000
Undeclared pools flagged (2023)
40 million EUR
Additional property tax raised (2023)
~100 million EUR
Target additional tax revenue as programme expands to other structures
Foncier Innovant — France's AI detection of undeclared property

Details

Maturity
Scaling
Promoter
Direction générale des finances publiques (DGFiP)
Keywords
Compliance & enforcement, aerial imagery, computer vision, property, tax compliance

Context

Foncier Innovant is an AI image-analysis programme run since 2021 by France's tax authority (DGFiP), built with Google and Capgemini, that scans aerial photography to spot undeclared swimming pools and building extensions liable for property tax.

Activities

The system automatically flags unreported pools and extensions from aerial imagery for tax officials to assess; it is now being extended from pools to verandas, sheds and other structures.

Results

An initial detection wave found over 20,000 undeclared pools (about €10 million in added tax); by 2023 the system had flagged roughly 140,000 unreported pools, yielding about €40 million in additional property tax, with an internal target of around €100 million as coverage expands.

Conclusions

The page presents this as a high-yield, concrete compliance use case, while flagging honest caveats around surveillance and proportionality, since aerial detection of private property raises privacy concerns and open questions about citizens' recourse.

Implementation

Implementation detail (cost, timeline, staffing, conditions for success) is not yet available for this practice.

Data sources

Where this practice's information was retrieved from, and when.

Attachments

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