Interior Designer or Interior Architect in France: What Is the Difference — and Which Do You Need?

A clear guide for international clients navigating the French renovation landscape

Studio de Beaulieu · March 2026

What was once a compartmentalised salon is now a fluid, light-filled space: by introducing a structural steel beam, we were able to emlarge the opening between living room and kitchen, creating a seamless connection between the two — visible here in the open sightline toward the kitchen beyond.

If you are planning a renovation in France and have begun researching professionals to accompany you, you have likely encountered both titles: interior designer (décorateur d'intérieur) and interior architect (architecte d'intérieur). In many countries, these titles are used interchangeably. In France, the distinction is meaningful — and for a project of real ambition, understanding it can make the difference between a beautiful result and a compromised one.

The legal distinction in France

In France, the title of architecte d'intérieur (interior architect) is not regulated in the way that architecte (architect) is, but it carries a specific professional meaning. An interior architect has typically trained at a specialised school — the École Boulle, the École Camondo, or a recognised design school — and holds professional civil liability insurance, including, for projects involving structural work, décennale insurance.

This décennale insurance is the critical distinction. It covers structural defects for ten years following project completion and is legally required for any work touching the structural integrity of a building: wall removal, floor level modifications, load-bearing interventions, plumbing rerouting. Without it, neither the professional nor the client is protected.

A decorator, by contrast, works primarily with the surface layer of a space — furniture, materials, colour, textiles, lighting — without intervening in the architecture. This is valuable work, but it is categorically different from the coordination of a full renovation involving multiple trades and structural decisions.

The question to ask is simple: does your project involve moving walls, restructuring the floorplan, or modifying the technical infrastructure? If yes, you need an interior architect — and their décennale insurance.

What an interior architect actually does — the Studio de Beaulieu approach

At Studio de Beaulieu, our involvement in a project begins long before any work commences — and extends well beyond the final delivery.

The conception phase is where the project takes shape: a precise analysis of the existing space, a spatial programme designed around your life and your aspirations, and a design concept that establishes the visual, material and emotional direction of the project. Nothing is arbitrary. Every decision — from the orientation of a partition wall to the profile of a cornice — serves a coherent intention.

The technical phase translates this vision into a language contractors can execute: detailed architectural drawings, technical specifications for every trade, a coordinated schedule of works. This documentation is what allows us to obtain accurate quotes, to compare contractors fairly, and to hold them to the agreed standard throughout the project.

Site supervision is where the project is truly protected. We visit regularly, coordinate between trades, resolve the inevitable unexpected discoveries that Haussmannian buildings reserve for those who venture inside their walls, and ensure that the quality of execution matches the quality of the design.

For international clients: why this matters even more

For buyers coming from the UK, the United States or elsewhere in Europe, the complexity of navigating a Parisian renovation from a distance is not to be underestimated. The contractor ecosystem in Paris operates on reputation and relationship. The administrative requirements — building permits, co-ownership (copropriété) assembly approvals, notifications to the Architectes des Bâtiments de France in protected zones — require fluency in both French bureaucracy and construction law.

Your interior architect is, in this context, far more than a creative director. They are your local representative, your technical guarantor, and the single point of accountability throughout a project that may last twelve to eighteen months.

At Studio de Beaulieu, we work regularly with clients based abroad. We communicate in both French and English, provide detailed progress reports, and ensure that distance never means uncertainty.

How to choose the right professional

Whether you are comparing interior architects or evaluating a firm, we would suggest asking three questions. Does their portfolio reflect the level of project you are envisioning — not merely in terms of aesthetic, but in terms of scale and complexity? Do they carry the appropriate professional insurance for the work you are planning? And when you speak with them, do they ask the right questions about your life, your programme and your constraints — rather than immediately presenting a style?

The best renovations begin with a genuine understanding of the person who will inhabit the space. The aesthetic follows from there.

Not sure which type of professional your project requires? Studio de Beaulieu offers a confidential first conversation to help you clarify your needs and define the right approach.

We'd love to hear about your project. Contact Studio de Beaulieu