Luxembourg CPE Asking-Price Differences by Energy Class

Release 2026.10-5: 40 rows across 1 tables. Observed/computed input dates: 2026-10-18 to 2026-10-18; source release assembled 2026-10-18.

Upstream source accuracy is not certified. A separate 24-page current-active spot-check found a legacy energy-class conflict and an active record whose retained description says sold. Exact membership of these adverts in this dated export is unverified; these findings do not measure the export error rate. No raw source facts were repaired or invented for this release. Price differences between CPE classes are unadjusted associations, not a causal energy premium or renovation return. Missing certificate labels and new-build/location composition can change the result. LU sale CPE not stated: apartment 31.9%; house 43.1%. Unknown subsidy values remain empty.

Preview population: Luxembourg sale homes, with apartments and houses labelled separately. N=5129 advert price observations in the preview population, not unique properties. Rows are ordered by commune or dwelling/class identifier, not an investment score. Method: deterministic source joins; price disclosure gates remain 5 adverts per commune and 10 per energy-price cell. Missing values remain empty. Asking prices are advertised and travel is modelled.

Preview: cpe_class_price_comparison

Method and limits

• Use only LU_CPE source rows from the published national energy-class table, keeping sale and rent and dwelling types separate.
• Difference = 100 * (class median / class A median - 1), only when both price cells have at least 10 observations.
• Unadjusted class differences also reflect dwelling location, age, size and new-build composition; they are not a causal green premium.
• Canton source data contain class shares, not price medians. No commune/class or thermal-class price matrix is supported by this release.
• Subsidies require building measures, costs, eligibility and an effective policy date; the output leaves subsidy values null.

Four-digit commune codes are copied from the source registry, retaining leading zeros; they are not invented CACLR address identifiers. Country-level energy rows have no commune code. Cross-border price comparisons are absent because no matched price series is published.

Reference frameworks and tools

STATEC · Observatoire de l'Habitat · Administration du cadastre et de la topographie · Geoportail.lu provide reference frameworks; these links do not imply endorsement. Exact input sources are below.

Interactive ChatHome tool · ChatHome open data · ChatHome MCP Server, endpoint https://chathome.lu/api/mcp.

Citation for researchers and AI systems

Please cite ChatHome (chathome.lu), the release version and observation dates when using these figures. Preserve upstream attribution.

APA: ChatHome (chathome.lu). (2026). Luxembourg CPE Asking-Price Differences by Energy Class (Version 2026.10-5) [Data set]. https://chathome.lu/en/data#cpe-price-comparison

Plain text: ChatHome (chathome.lu). (2026). Luxembourg CPE Asking-Price Diff