Interior architect

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In order to operate as an interior architect, business executives must hold a business permit.

The business permit is granted to the business (either the business manager operating under his own name, or the company he runs) provided that:

  • the business executive meets the legal requirements in terms of qualification and professional integrity;
  • the business has a fixed physical establishment in Luxembourg (no so-called 'letterbox companies').

The fulfillment of the conditions for access to the profession is checked by the General Directorate for Small and Medium-Sized Enterprises at the time the business permit application is submitted.

Depending on the legal form chosen, the applicant must proceed with different registrations/affiliations before starting their activity.

Interior architects established abroad (in the Swiss confederation or a country of the European Economic Area) may provide occasional and/or temporary services in Luxembourg without business permit.

In the context of public procurement contracts, there are specific hourly reference rates (French, Pdf, 96 Kb) for architectural and engineering work for the public sector.

Who is concerned?

The activities of interior architects include:

  • creating and designing the interiors of buildings;
  • drawing up the building's interior plans;
  • summarising and analysing the different activities needed to implement the plans.

All professionals holding a business permit as architects can also work as landscape architects and interior architects.

Salaried workers or civil servants do not need a business permit in order to work as interior architects for their employer or their administration.


The applicant must have a Bachelor's degree in interior design or equivalent. This diploma must be:

Preliminary steps

Entry into the registry of certificates

In order to establish the level of the foreign diploma, the Minister of the Economy may require the applicant to have their diplomas registered in the register of certificates.

Specificities of BENELUX university diplomas

These diplomas are automatically recognised (in terms of their registration in the register of certificates) in all 3 BENELUX countries, provided they have been issued by an establishment that is recognised in the country in which the diploma was obtained.

These diplomas therefore do not need to be recorded in the register of certificates in Luxembourg.

However, automatic recognition is limited to the following degrees:

  • for the Flemish community of Belgium: the 'graad van bachelor' and the 'graad van master';
  • for the francophone community of Belgium: the 'grade académique de bachelier' and the 'grade académique de master';
  • for the germanophone community of Belgium: the 'Diplom Master' and, if applicable, a masters' degree from the germanophone community of Belgium;
  • for the Netherlands: the 'getuigschrift bachelor' and the 'getuigschrift master'.

In the absence of such a diploma, the applicant needs to request a confirmation in the BENELUX country where it was awarded, that the diploma is officially recognised in said country.


The stamp duty for the issue of a business permit amounts to EUR 50.

If the establishment is moving to another address, the applicant must notify this, free of charge, to the General Directorate for Small and Medium-Sized Enterprises. In this case, the applicant will receive a new business permit free of charge.

How to proceed

Filing an application

The applicant can submit their application for a business permit in 2 ways:

  • by applying in person for a business permit online via, using a LuxTrust product.
    The system determines which supporting documents need to be attached to the application depending on the information entered by the applicant;
  • by sending the business permit application by post to the General Directorate for Small and Medium-Sized Enterprises.

Anyone can get help with their business permit application by:

Supporting documents

Documentary proof of qualification

The applicant must also submit:

  • a copy of his Bachelor's degree in interior design;
  • a copy of the ministerial order of registration in the register of certificates, if requested;
  • a certificate (EC certificate of experience or equivalent) delivered by the competent authority or body of the country of origin (generally a professional association) in case of prior professional activity in another EU Member State;
  • a certificate of affiliation with the Joint Social Security Centre, in case of professional practice in Luxembourg.

The non-resident applicant:

  • may work as an interior architect in Luxembourg if the profession is regulated in their country of origin and if they are entitled to exercise it;
  • must provide the General Directorate for Small and Medium-Sized Enterprises with a certificate from the competent authority in their country of origin attesting access to the profession.

Documents attesting to professional integrity

If the applicant has been residing in Luxembourg for more than 10 years, he must demonstrate his professional integrity by:

If the applicant is a non-resident or has been a resident in Luxembourg for less than 10 years, they must demonstrate their professional integrity by providing:

  • a declaration of honour concerning any management positions held in businesses during the 3 years prior to the application;
  • a declaration of non-bankruptcy made before a notary;
  • an extract from the criminal record no. 3 or equivalent issued by the country or countries in which the applicant has resided during the 10 years prior to the application;
  • an extract from the Luxembourg criminal record (record no 3) if the person is already working as a salaried worker or carrying out a self-employed activity in Luxembourg.

This sworn declaration must state that the applicant has not been involved in the bankruptcy of a business in his own name nor in the bankruptcy of a company.

Failing this, an affidavit (sworn statement) must be provided.

All attached documents must be less than 3 months old.

Other documents to be submitted with the application

The applicant must also attach the following documents to his application:

  • for citizens of Luxembourg, the European Union, or the European Economic Area (Iceland, Liechtenstein, Norway) or Switzerland: a copy of their ID card or passport;
  • for citizens of third countries: a written confirmation from the Minister responsible for Immigration that the applicant meets all the conditions for obtaining the residence permit applied for;
  • proof of payment of stamp duty (droit de chancellerie), in the form of:
    • either a tax stamp, value EUR 50, purchased from the Registration Duties, Estates and VAT Authority (AED);
    • or the proof of payment of EUR 50 into the IBAN account LU76 0019 5955 4404 7000, BIC code: BCEELULL of the Diekirch Revenue Office, with the following communication: 'autorisation de commerce';

In the event of an online application for a business permit via MyGuichet, the system will automatically generate the list of supporting documents to be attached to the application, which may vary depending on the data entered by the applicant.

It should be noted that for applications submitted in the context of a business set up in the form of an SARL-S, the applicant must forward the draft constitutional documents of the SARL-S to the Ministry of the Economy.

Application processing time

Applications will usually be processed within 3 months from the receipt of the complete application. The absence of a response before the end of the 3-month period is equivalent to a tacit authorisation.


Applicants whose business permit application has been denied by the Minister may, within the legal deadlines:

Insurance and registration with the OAI

After obtaining the business permit, the business manager must:

  • take out a specific civil liability insurance which covers their activity, as well as their employees' activities;
  • register with the OAI (see registration procedure).

Registrations/affiliations depending on the legal form of the company

Sole proprietorship (Entreprise individuelle)

After obtaining a business permit, the head of a sole proprietorship must:

Partnerships (SCS, SENC)

After obtaining a business permit, the executive(s) of a partnership (SCS, SENC) must:

Capital companies (SA, SARL, SCA, SE)

After obtaining a business permit, the executives(s) of a capital company (SA, SARL, SCA, SE) must:

Simplified limited liability company(SARL-S)

After obtaining a non-definitive copy of the establishment permit, the manager(s) of a simplified limited liability company (SARL-S) must:

It should be noted that managers of an SARL-S do not need to incorporate their company before a notary. A private deed will suffice.

Temporary service provision in Luxembourg

Interior architects established abroad (in the Swiss confederation or in a country of the European Economic Area) may freely offer services in Luxembourg. There is no need for a business permit and no specific notification to the Ministry of the Economy is required.

However, when active in Luxembourg, the service provider is subject to the national rules of professional, regulatory or administrative conduct directly related to their professional qualifications. The service provider is also subject to the disciplinary provisions applicable to Luxembourg professionals.

Interior architects can contact the Order of Architects and Consulting Engineers (OAI) for further information.

They must also:

  • request their registration on the OAI's list of occasional service providers;
  • take out a specific civil liability insurance which covers their activity, as well as their employees' activities. If the insurance they have taken out in their country of origin does not cover all legal and contractual liabilities incurred in Luxembourg they must either adapt their insurance or take out a specific civil liability insurance covering their activities and those of their employees.

If the interior architect, as a liberal profession:

Obligations of all professionals

Each professional must comply with the following throughout their existence:

  • all requirements with respect to obtaining a business permit;
  • all laws and regulations with respect to business management.


Professionals without a business permit run the risk of criminal sanctions (imprisonment and fines) and the temporary closure of the establishment.

Online services and forms

Who to contact

General Directorate for Small and Medium-Sized Enterprises (Department for Authorisations of Establishment)

  • Ministry of the Economy General Directorate for Small and Medium-Sized Enterprises (Department for Authorisations of Establishment)

    PO box 535 / L-2937 Luxembourg
    Email address:
    The telephone helpline is open Monday to Friday, from 9.00 to 12.00 and 13.30 to 16.30 (not on public holidays).

Order of Architects and Consulting Engineers

  • Order of Architects and Consulting Engineers

    6, boulevard Grande-Duchesse Charlotte L-1330 Luxembourg Luxembourg
    Email address:
    Closed ⋅ Opens at 9.00
    9.00 to 12.00, 14.00 to 16.00
    9.00 to 12.00, 14.00 to 16.00
    9.00 to 12.00, 14.00 to 16.00
    9.00 to 12.00, 14.00 to 16.00
    9.00 to 12.00, 14.00 to 16.00
    Monday to Friday from 09.00 - 12.00 and 14.00 - 16.00

Related procedures and links


Professional integrity Application for and modification of a business permit Architect Landscape architect Occasional and temporary provision and notification of services in Luxembourg Extract from the criminal record of a natural person Professions without automatic recognition of diplomas (list 2) Professions with automatic recognition of diplomas (list 3)


Further information

Legal references

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