chathome-lu/luxembourg-real-estate-market

ChatHome Luxembourg Real Estate Market Aggregates

Privacy-safe, commune-level housing market aggregates for Luxembourg, published by ChatHome. The dataset combines sample-gated asking-price statistics from active residential listings with clearly labelled official references from STATEC / Observatoire de l'Habitat.

It contains no listing descriptions, photos, street addresses, contact details, user data, or individual property records.

Data files

• data/commune_prices.tsv — latest sale and rental asking-price aggregates for the 20 communes with the largest eligible active-listing samples, plus official reference values and quarter-over-quarter movements where available.
• data/national_market_index.tsv — national market-index snapshots available in ChatHome's aggregate index.
• data/dataset_metadata.json — generation timestamp and row counts.

Sale price fields use EUR per square metre. Rental fields use monthly EUR per square metre. Empty values mean the data did not clear the publication threshold or the source had no value; they must not be interpreted as zero.

Methodology

The ChatHome asking-price fields are computed from residential listings that are both:

1. status = active; disabled, sold, let, withdrawn, archived, and otherwise non-active listings are excluded; and
2. catalog-visible (visibility.eligible = true).

Only residential apartment and house types are included. Values outside plausibility bounds are discarded: EUR 500–40,000/m² for sale and EUR 3–120/m²/month for rent. Luxembourg City quarters are folded into the Luxembourg City commune. Steinsel is excluded because its location data does not meet ChatHome's publication-quality threshold.

To avoid false precision:

• five or more observations: median, mean and interquartile range may be published;
• two to four observations: only the p25–p75 range is published;
• fewer than two observations: no price statistic is published.

The official_* fields are labelled cross-references derived from the latest available STATEC / Observatoire de l'Habitat aggregate indices. The buy_*_qoq_pct fields compare the latest two canonical quarters in those indices. Asking prices and transaction prices are different measures and should not be substituted for one another.

The current commune snapshot was computed on 2026-07-06. Check each row's computed_at and official_quarter fields before use.

Intended uses

• Luxembourg housing-market research and dashboards
• commune comparisons and affordability tools
• retrieval-augmented generation and agent grounding
• reproducible examples for the ChatHome public API
• education, journalism and market monitoring

Limitations

• Asking prices are seller or landlord expectations, not completed transaction prices.
• Coverage follows the supply visible to ChatHome and is not a census of the entire market.
• Small rental samples are intentionally blank or range-only in many communes.
• The 20 communes are selected by eligible active-listing volume, so the set can change between releases.
• Market conditions change quickly. Always use computed_at and avoid presenting a snapshot as current after a newer release exists.
• The dataset must not be used to infer, reconstruct or republish individual agency listings.

Attribution and licensing

The ChatHome-produced aggregate compilation is released under CC BY 4.0. Attribute it as:

ChatHome Luxembourg Real Estate Market Aggregates, chathome.lu, snapshot 2026-07-06.

Official reference fields retain the attribution and source terms of STATEC / Observatoire de l'Habitat. Cite those institutions when using the official_* or official trend fields.

Refresh process

The export is reproducible from ChatHome's precomputed aggregate collections with:

cd backend/cloud-run
npx tsx scripts/export-public-market-dataset.ts

This command is read-only against production and has zero LLM cost.

Contact

• Website: https://chathome.lu
• Public API and MCP documentation: https://chathome.lu/mcp
• Email: hello@chathome.lu