Building and accommodation conversions statistics

Building and accommodation conversions statistics are a comprehensive set of statistics used to collate data on all residential and semi-residential building conversions, including information on their characteristics, such as:

  • type;
  • construction method;
  • type of heating;
  • type of roofing;
  • surface area;
  • etc.

Who is concerned

All property owners and project owners who have applied for a building conversion permit will be contacted by the National Institute for Statistics and Economic Studies (Institut national de la statistique et des études économiques – STATEC) to take part in a survey.

The building permits in question are issued by the various Luxembourg communes and then forwarded to STATEC. The permits apply to residential and semi-residential buildings.


Before taking part in the survey, the parties concerned will be sent a letter containing an access code provided by STATEC. The parties in question must have received this invitation letter in order to take part in the survey,


The questionnaire for the survey on building and accommodation conversions must be filled in by the deadline specified in the invitation letter.

How to proceed

Responding to the questionnaire

The STATEC invitation letter contains:

  • an access code that is required to open the online questionnaire via; and
  • a hardcopy (paper) version of the questionnaire, along with a return envelope, should the respondent prefer to reply by post.

Respondents should only fill in one questionnaire (either the online version via, or the hardcopy (paper) version).

If you experience any problems with the questionnaire, please contact STATEC.

General information about the online questionnaire on

For those who wish to respond to the questionnaire online, 2 options are available:

  • respond with authentication, using your LuxTrust credentials: respondents will be able to interrupt their session and resume filling in the questionnaire at a later time;
  • respond without authentication: respondents will not be able to interrupt their session and resume at a later time.

Obligations and sanctions

Taking the survey is mandatory.

Failure to respond or willingly providing false information may lead to financial sanctions. The purpose of this legal requirement is to enhance the quality of the statistics produced, by ensuring that STATEC can collect reliable and sufficiently representative data on the resident population.

Data Controller and purpose of processing

Personal data is processed by STATEC. The building and accommodation conversions statistics are used to:

  • keep the Register of Buildings and Dwellings (Registre des Bâtiments et des Logements - RBL) up to date;
  • publish analytical reports on the collected data.

Lawfulness of processing

The processing complies with the General Data Protection Regulation (GDPR). The personal data that is collected will be permanently erased within a maximum of 3 years after it is collected.

During that time, the data will be treated with the strictest confidentiality. Such data will only be used for purely statistical purposes, and in no circumstances will it ever be disclosed.

STATEC has also implemented a number of technical and organisational measures to protect personal data, including measures to secure computerised processing, and to restrict access rights to data handled by STATEC staff.

Source of personal data

STATEC refers to the building permits it receives from the communes to collect property owners' and project owners' contact details so that it can get in touch with them.

In case of disagreement regarding the protection of personal data

In the event of disagreement regarding the protection of your personal data, you may contact STATEC's Data Protection Officer (DPO):

  • by post: DPO, STATEC, B.P. 304, L-2013 Luxembourg;
  • by phone: 247-88 492;
  • by email:

In accordance with the General Data Protection Regulation, survey respondents have the following rights:

  • the right to access their data;
  • the right to have their data rectified or erased;
  • the right to restrict processing, or to object to processing, of their personal data;
  • the right to data portability.

They may also lodge a complaint with the National Commission for Data Protection (Commission Nationale pour la Protection des Données – CNPD):

  • by post: CNPD, 15 Boulevard du Jazz, L-4370 Belvaux;
  • by phone: 26 10 601.

Forms / Online services

Survey in relation to the statistic on the transformation of buildings and dwellings

To complete your application, the information about you collected from this form needs to be processed by the public administration concerned.

That information is kept by the administration in question for as long as it is required to achieve the purpose of the processing operation(s).

Your data will be shared with other public administrations that are necessary for the processing of your application. For details on which departments will have access to the data on this form, please contact the public administration you are filing your application with.

Under the terms of Regulation (EU) 2016/679 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, you have the right to access, rectify or, where applicable, remove any information relating to you. You are also entitled to withdraw your consent at any time.

Additionally, unless the processing of your personal data is compulsory, you may, with legitimate reasons, oppose the processing of such data.

If you wish to exercise these rights and/or obtain a record of the information held about you, please contact the administration in question using the contact details provided on the form. You are also entitled to file a claim with the National Commission for Data Protection (Commission nationale pour la protection des données), headquartered at 15, boulevard du Jazz L-4370 Belvaux.

By submitting your application, you agree that your personal data may be processed as part of the application process.

Enquête sur la statistique des transformations des bâtiments et logements

Les informations qui vous concernent recueillies sur ce formulaire font l’objet d’un traitement par l’administration concernée afin de mener à bien votre demande.

Ces informations sont conservées pour la durée nécessaire par l’administration à la réalisation de la finalité du traitement

Les destinataires de vos données sont les administrations compétentes dans le cadre du traitement de votre demande. Veuillez-vous adresser à l’administration concernée par votre demande pour connaître les destinataires des données figurant sur ce formulaire. Conformément au règlement (UE) 2016/679 relatif à la protection des personnes physiques à l'égard du traitement des données à caractère personnel et à la libre circulation de ces données, vous bénéficiez d’un droit d’accès, de rectification et le cas échéant d’effacement des informations vous concernant. Vous disposez également du droit de retirer votre consentement à tout moment.

En outre et excepté le cas où le traitement de vos données présente un caractère obligatoire, vous pouvez, pour des motifs légitimes, vous y opposer.

Si vous souhaitez exercer ces droits et/ou obtenir communication de vos informations, veuillez-vous adresser à l’administration concernée suivant les coordonnées indiquées dans le formulaire. Vous avez également la possibilité d’introduire une réclamation auprès de la Commission nationale pour la protection des données ayant son siège à 15, boulevard du Jazz L-4370 Belvaux.

En poursuivant votre démarche, vous acceptez que vos données personnelles soient traitées dans le cadre de votre demande.

Erhebung zur Statistik über die Umwandlungen von Gebäuden und Wohnungen

Ihre in diesem Formular erfassten personenbezogenen Informationen werden von der zuständigen Verwaltungsbehörde verarbeitet, um Ihren Antrag erfolgreich abzuschließen.

Diese Informationen werden von der Behörde für den zur Verarbeitung erforderlichen Zeitraum gespeichert.

Die Empfänger Ihrer Daten sind die im Rahmen Ihres Antrags zuständigen Verwaltungsbehörden. Um die Empfänger der in diesem Formular erfassten Daten zu erfahren, wenden Sie sich bitte an die für Ihren Antrag zuständige Behörde.

Gemäß der Verordnung (EU) 2016/679 zum Schutz natürlicher Personen bei der Verarbeitung personenbezogener Daten und zum freien Datenverkehr haben Sie das Recht auf Zugang, Berichtigung und gegebenenfalls Löschung Ihrer personenbezogenen Informationen. Sie haben zudem das Recht, Ihre erteilte Einwilligung jederzeit zu widerrufen.

Weiterhin können Sie, außer in Fällen, in denen die Verarbeitung Ihrer Daten verpflichtend ist, Widerspruch einlegen, wenn dieser rechtmäßig begründet ist.

Wenn Sie diese Rechte ausüben und/oder Einsicht in Ihre Informationen nehmen möchten, können Sie sich unter den im Formular angegebenen Kontaktdaten an die zuständige Verwaltungsbehörde wenden. Sie haben außerdem die Möglichkeit, bei der Nationalen Kommission für den Datenschutz Beschwerde einzulegen (Commission nationale pour la protection des données, 15, boulevard du Jazz L-4370 Belvaux).

Wenn Sie Ihren Vorgang fortsetzen, akzeptieren Sie damit, dass Ihre personenbezogenen Daten im Rahmen Ihres Antrags verarbeitet werden.

Who to contact

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