Methodology.
Public indicators. Official sources. Update dates.
This page describes the analysis grid applied to every French address: the cross-checked indicators, their source, the five-zone reading structure, and what public data can — and cannot — capture.
— The structure of a dimension
The same structure, dimension after dimension.
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Definition
The measure in plain language: what it covers, what it does not, and the official reference threshold.
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Reading at the address
The value measured at your address, set against the neighbouring cell and the municipality. Not a borough average.
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Graphical representation
A figure suited to each dimension. No numerical score, no single grade: each datum is read in its own unit.
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Limits of the measure
What public data does not capture: seasonal variations, isolated events, subjective perception. Blind spots are named.
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Sources and extraction date
Each data-producing body is named, with the extraction date and dataset vintage. Always verifiable.
This structure is applied to every indicator analysed. Each measure is treated with the same care, whether the matter is the building's energy diagnostic or the walking time to the nearest primary school.
— Why this grid
A documentary reading, comparable across addresses.
An apartment is signed at a precise moment, in a notarial office, with documents to keep. This analysis grid is built for that moment: read on screen, compared across addresses, shared with a relative for a second opinion.
The same structure serves Paris, Saint-Cirq-Lapopie, Vannes. From one address to another, you compare on equal footing: dimension 03 stays dimension 03, same unit, same extraction date. The reading remains useful beyond a single search.
— Analysis contents
Everything analysed, in order.
Twelve thematic dimensions grouping the indicators, plus the radar synthesis and sources. Each dimension carries its official reference threshold.
01
Built fabric & energy
Energy label, era, GHG.
02
Tap water
Hardness, nitrates, PFAS.
03
Noise
Cumulated Lden.
04
Hazards
Tech, flood, classified.
05
Schools
Walking distances.
06
Services & shops
BPE density.
07
Transport
Metro, RER, bus.
08
Fibre & network
FTTH eligibility.
09
Damp & soil
Clay, water table, cavities.
10
Market & price
DVF median, trend.
11
Radar synthesis
Overview.
12
Sources & method
Detail per dimension.
— Public sources used
Read by dataset, not by survey.
All data come from French public bodies. No unsourced self-reported data. The extraction date of each dimension appears on its municipality page.
ADEME
Energy performance diagnostics, national database.
Quarterly refresh
ARS · SISE-Eaux · Anses
Tap water sanitary checks, including PFAS since 2026.
Monthly refresh
Bruitparif · Cerema
Strategic noise maps, Lden modelling.
Annual refresh
Géorisques · DREAL
Tech, flood, classified, clay shrinkage, seismicity.
Per regulatory order
DEPP · CNAF
School mapping, family services.
Annual refresh
INSEE BPE
Permanent equipment and shops database.
Annual refresh
GTFS · IDFM
Transit networks, hourly frequencies.
Monthly refresh
ARCEP
FTTH deployment, commercial operators.
Quarterly refresh
BRGM
Clay hazard, cavities, water table.
Rolling refresh
DGFiP · DVF
Notarised real-estate transactions.
Half-yearly refresh
ANIL
Rental tension, rent caps.
Annual refresh
IGN · IGC
Geography, former quarries and subsoil.
Rolling refresh
— What this analysis is not
Five things best stated.
- Not a property valuation.
- Not a regulatory technical diagnostic.
- Not a buy or sell recommendation.
- Not advisory.
- Not a substitute for an on-site visit.
It is a documentary reading of your address. It complements the offer documents without replacing them. Decisions remain yours.
— Try on an address
Free.
All analyses are free. Exact-address precision requires a free account (5 seconds).
Free. Free account for address precision.