Applying for financial aid to install a rainwater catchment system

Installing equipment to collect rainwater is intended to contribute to sustainable management of water resources by promoting the use of rainwater for domestic purposes other than human consumption or bathing, in particular to supply water for flushing toilets, cleaning, washing, and watering plants.

Individuals may receive financial aid from the state to install equipment for the collection of rainwater in a dwelling or a housing complex.

This aid is limited to 25 % of the investment cost for installing the rainwater catchment system and may not exceed a maximum of EUR 1,000.

Who is concerned

The following categories of individuals may receive this financial aid:

  • property developers;
  • home owners, whether the home is occupied by the owner or not;
  • tenants in a dwelling unit or a housing complex.

The dwelling must be intended for habitation.


To be entitled to this aid, the rainwater catchment system must satisfy several conditions:

  • the roof connected to the catchment system must have a minimum surface area of 40 m2;
  • the water collector must have a filter;
  • the storage tank must be watertight and have a minimum capacity of 3,000 litres per dwelling. In the case of a housing complex, the minimum capacity of the storage tank is calculated as follows: C = (S/40) x 3,000. "S" is the net surface area of the roof(s) connected and expressed in square meter (S≥40);
  • a booster pump must be installed as part of the system;
  • the installation must include a system for regulating and automatically monitoring the level in the storage tank, in the fall-back system, and in the pump;
  • a fall-back system using potable water in dry periods must be provided for;
  • a brightly coloured panel bearing the words, 'House equipped with a rainwater catchment and distribution system' must be placed less than 30 cm from the potable water supply counter;
  • a distribution network:
    • installed in such a way as to be physically separated from the potable water circuit;
    • which provides water for flushing at least one toilet per dwelling;
    • using pipes in different materials or colours from those used in the potable water system;
    • bearing the words 'rainwater' or 'non-potable water' or any similar wording in indelible marking;
    • whose taps for accessing the rainwater, if freely accessible, must have immovable or lockable handles;
    • designed so as to enable the subsequent installation of a water metre.

The wording placed on the distribution network and on the panel indicating the presence of a rainwater catchment system may be in French or German.

How to proceed

Applicants for the financial aid must first have their system approved by the relevant department of the Chamber of Skilled Trades and Crafts (Chambre des Métiers). To prove the compliance of the rainwater catchment system installed at the applicant's dwelling or dwellings, the applicant must complete an approval form and send it to the address below:

Chamber of Trades
Department of Building Review and Approval
(Service de contrôle et de réception du bâtiment) B.P. 1604
L-1016 Luxembourg

If the installation does not satisfy all the necessary conditions, it will be approved only after it is brought into compliance.

The costs of obtaining approval are borne by the applicant.

In order to obtain financial aid for rainwater catchment systems, applicants must then complete an aid application form and return it to the Water Management Authority (Administration de la gestion de l'eau). Several supporting documents must be sent with the form:

  • the original of the receipted invoice or proof of payment for the installation;
  • the approval agreement specifying that the installation is in compliance.

Applicants who are tenants must specify the name of the owner of the dwelling or dwellings when applying for the aid.

Applications for financial aid for rainwater catchment systems must be submitted before 1 March of the year following that in which the system was installed and within 3 months of the Chamber of Skilled Trades and Crafts' approval.

Forms / Online services

Notice to users of the Google Chrome browser version 80: there are currently problems with the electronic signature of forms if you use this browser. Please switch to another browser to complete your online process.

Thank you for your understanding

Demande de réception pour installations de récupération d’eau de pluie / Abnahmeantrag für Regenwassernutzungsanlagen

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 1, Avenue du Rock'n'Roll, L-4361 Esch-sur-Alzette.

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

Notice to users of the Google Chrome browser version 80: there are currently problems with the electronic signature of forms if you use this browser. Please switch to another browser to complete your online process.

Thank you for your understanding

Demande en obtention d'une aide budgétaire pour la mise en place d'une infrastructure de collecte des eaux de pluie

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 1 Avenue du Rock'n'Roll, L-4361 Esch-sur-Alzette.

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

Notice to users of the Google Chrome browser version 80: there are currently problems with the electronic signature of forms if you use this browser. Please switch to another browser to complete your online process.

Thank you for your understanding

Antrag hinsichtlich finanzieller Beihilfe für Regenwassernutzungsanlagen

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, 1, Avenue du Rock'n'Roll, L-4361 Esch-sur-Alzette).

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

Who to contact

Double click to activate the map
Last update