1.1M
combined DLD archive
Public accuracy proof
Trust the range.
Audit the model.
FonatProp is designed to sell confidence, not magic. The public product shows clear evidence, a confidence band and the data limits behind each valuation before an agent turns it into a final recommendation.
9.8%
support-slice MAPE
86.8%
support-slice within 20%
12.7%
broad strict-holdout MAPE
How the public test should work
Use official transaction evidence
Dubai uses verified DLD transaction history. France uses DVF public transaction data and DPE context.
Return a range, not a fake certainty
Public users see a broad band. Agents keep the private valuation workflow and final professional judgment.
Publish accuracy as a product layer
FonatProp should show sample size, median error and confidence bands so buyers can trust the engine.
Retest by market
Dubai and France stay separate because their data laws, fees, energy rules and price behavior are different.
France commercial proof
Official data plus compliance.
DVF transactions for commune and property-type benchmarks
DPE energy class for price and rental legality risk
Rent-cap and zone-tendue checks before yield is trusted
Renovation aids and DPE work plans for net capex
France should be sold as a commercial beta until the address-level backtest is published. The product can already be valuable because investment and renovation require regulation, DPE and net capex, not only a single price.