Procedures & Eligibility: How to Get Your Subsidies

The order of steps in a subsidised project

A renovation or installation project that aims for public support follows a specific sequence, and reversing it often jeopardises the file. It starts with an energy consultation, which checks that the project fits the state of the building and any other works planned. Next comes a detailed quote from an authorised company, which forms the basis for calculating the support.

For some measures, the application must be submitted and sometimes confirmed before works start; ordering materials or signing a firm order too early can be treated as the start of the works. The chosen company then carries out the works and issues a detailed invoice. The application file, completed with supporting documents, is then submitted or finalised, and payment follows after review.

Deadlines and whether prior approval is required depend on the measure concerned: details are published on guichet.lu for each type of works, and Klima-Agence can confirm in advance the order to follow for your project.

Who can submit an application

Who is entitled to apply varies by measure: an owner-occupier, a landlord, a co-ownership represented by its managing agent, or sometimes a tenant for certain equipment with the owner's consent. As a rule, only one application is submitted per dwelling and per measure, which means coordinating requests when several works are carried out in the same year.

In co-ownerships, common areas follow different rules from private units: the general meeting usually has to approve the works before any application is filed, and the managing agent often centralises the file. Clarify early who, in your situation, is entitled to sign and to receive the support.

Documents generally required

A file usually includes proof of identity, proof of ownership or of standing to apply, the quote and later the detailed invoice from the company, technical data on the material or works (performance figures, surfaces, ratings as relevant) and sometimes a land registry extract or a prior communal permit. The exact list depends on the measure and is set out on the corresponding official sheet.

Always keep a digital copy of every document: quote, invoice, technical data sheets, photos taken before works start. These documents serve both the national application and any communal aid, whose conditions each commune sets independently.

MyGuichet and electronic identification

Most procedures linked to housing subsidies are handled online through MyGuichet, Luxembourg's administrative platform. Access to a private account requires a recognised electronic identification product, such as LuxTrust or an electronic identity card used with a compatible reader or application.

It is worth checking the validity of your identification product before starting a file, since renewal takes time and can delay a submission if works have already begun. A separate professional account lets companies and managing agents handle certain steps on behalf of their clients, under the arrangements described on MyGuichet.

What causes a file to fail in practice

Three causes come up most often: works started or ordered before the required approval, a company that is not authorised for the trade concerned, and missing or inconsistent technical data on the quote or invoice. A quote that omits the technical details needed to calculate the support forces you to request another document from the company, delaying the file.

Checking the company's authorisation before signing avoids this risk; the profiles in our directory carry the public information available on this point. When in doubt about a project's eligibility or the order of steps, a prior consultation with Klima-Agence, which is free and independent, secures the file before any financial commitment is made.