It's the question I'm asked most often when an overseas owner first gets in touch: "what exactly do you do that my architect doesn't?" The confusion is fair enough. A French renovation pulls in several trades whose titles blur together, and plenty of firms keep the lines fuzzy by billing themselves as "all-in-one". But once you lay the roles out, the picture is simple — and getting it straight is the first thing that protects an owner running a project from a distance.
You are the owner
The owner — in French, the maître d'ouvrage — is the person the work is done for: the one who commissions it, pays for it, and makes the calls. That's you. In principle everyone else is working in your interest, but each of them also has a trade to run, constraints of their own, and at times interests of their own. So the real question isn't "who do I trust?" in the abstract — it's "who does what, and who pays whom?"
The design authority designs the project and runs the works
The maître d'œuvre — usually an architect, sometimes a non-architect project lead — designs the scheme and runs its execution. They draw it up, produce the plans and the technical specification, put the trades out to tender, coordinate them on site, check that what gets built matches what was drawn, and sign the technical documents — the instructions to contractors and, above all, the procès-verbal de réception, the certificate that closes the works between you and the contractors. They carry the professional liability for getting the build right. In Paris, the moment a project touches the structure or crosses certain floor-area thresholds, using an architect stops being optional.
The contractors do the building
The trades and contractors — mason, electrician, plumber, painter, joiner — do the actual work. They bid on the quotes, sign their contracts with you, and build under the design authority's direction. Their interest is perfectly legitimate: to sell their work at the best price for themselves. Which is exactly why nobody leaves them to mark their own homework.
The owner's representative is on your side, and only yours
This is where I come in. Owner's representation — in France, assistance à maîtrise d'ouvrage, or AMOA — is the one role whose entire job is to stand on your side of the table. I'm none of the above: I don't design, I don't run the site, I build nothing, and I sign neither the contracts nor the handover certificate. My job is to read, report and flag: to go through the quotes and contracts before you commit, to follow the site and report back to you every week, to put in writing the gaps between what was agreed and what's actually happening, and to tee up your decisions so you can make the call with the full picture, even from six time zones away.
What I don't do matters as much as what I do. I'm not there to replace your architect — quite the opposite. I let each professional get on with their job, and I make sure the whole thing stays aligned with your interest. And I take no commission from any of them: I'm paid by you, and only by you. That independence is what gives my warnings their weight.
Why the split matters when you're far away
When you live in Paris, you drop by the site, you run into the architect, you pick things up by feel. From abroad, that thread snaps. The design authority does its job — but it is, in effect, marking its own work on the quality of its own direction. The contractors do theirs. Nobody in that line-up is there purely to read the project through your eyes and warn you with nothing of their own at stake. That's the gap an independent representative fills: not one more party, but the only one working for you alone.
To see how this works in practice, read My method. For the basis of my independence, see "why your representative should take nothing from the contractors". And if this is all new, start with the guide "renovating a Paris apartment from abroad".
— Paris, May 2026. Charles-Eric Guerrier.