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ScorCity Scoring Methodology

How we calculate the investment score of each municipality using 100% open data.

General Principle

The ScorCity score is a composite indicator from 0 to 100 that measures the real estate investment potential of a municipality. It synthesizes 16 objective criteria from public sources, grouped into 6 pillars.

Each pillar receives a score from 0 to 100, then the final score is calculated by weighted average according to the relative importance of each pillar for an investor.

The 6 Pillars

💰
Yield
Weight: 25%
Rent-to-price ratio. Source: DVF + rental references.
🏠
Price
Weight: 20%
Median price per sqm. Local market accessibility. Source: DVF.
⚡
Energy (EPC)
Weight: 15%
Share of A/B/C rated homes in housing stock. Source: ADEME.
🛡
Safety
Weight: 15%
Crime rate per 1,000 inhabitants. Source: SSMSI.
🌳
Quality of Life
Weight: 15%
Facilities, water, fiber, healthcare, education. Sources: BPE, Hub'Eau, ARCEP.
📈
Growth
Weight: 10%
Demographic trends, construction, prices. Sources: INSEE, Sitadel, DVF.

Score Calculation

Step 1: Data Collection

Raw data is collected from 9 official public sources, all under Open License 2.0. Import is automated and frequency varies by source (daily to annual).

Step 2: Normalization

Each indicator is normalized on a 0-100 scale relative to all French municipalities, using a percentile ranking. A municipality at the 90th percentile for yield gets a sub-score of 90/100 on that criterion.

Step 3: Aggregation

Sub-scores are aggregated per pillar (average of the pillar indicators), then the final score is calculated by weighted average of the 6 pillars according to the weights indicated above.

Step 4: Updates

The score is recalculated during each nightly build. Municipalities whose data has been updated see their score adjusted automatically.

Data Sources

SourceDataFrequencyLicense
DVF (DGFIP)Real estate transactions, price/sqmBiannualOpen License 2.0
ADEMEEnergy performance certificatesDailyOpen License 2.0
API GeoMunicipality directory, GPS coordinatesAnnualOpen License 2.0
INSEE (BPE)Facilities, demographics, incomeAnnualOpen License 2.0
GeorisquesNatural and technological risksDailyOpen License 2.0
SSMSISafety statisticsAnnualOpen License 2.0
Hub'EauDrinking water qualityDailyOpen License 2.0
ARCEPFiber and mobile coverageQuarterlyOpen License 2.0
DGFIP (REI)Local taxation (property tax)AnnualOpen License 2.0

Limitations and Transparency

The ScorCity score aims to provide a synthetic and objective overview. However:

  • It does not replace the advice of a real estate professional.
  • Data may have a time lag (up to 12 months for annual sources).
  • Some rural municipalities have less data, which may affect score accuracy.
  • The score does not account for subjective factors (tourist appeal, future urban projects, etc.).

We continuously work to enrich sources and improve model accuracy.