One country, a hundred different renovation markets

If you've ever asked around about what it costs to renovate a bathroom in France, you've probably gotten a number. And if you've asked in two different regions, you've probably gotten two quite different numbers. National averages hide more than they reveal.

The coefficient nobody talks about

Labor rates don't smooth themselves across a country the size of France. A plasterer in the Paris region operates in a market with different wage pressure, different transport logistics, different parking constraints, and different demand density than one in the Creuse or the Aveyron. Dense urban cores carry a premium. Coastal tourism regions carry a seasonal one. Rural areas sometimes come in under the national average, sometimes not, it depends on whether a qualified tradesperson can reach you in under an hour without charging for the round trip.

Material prices are more uniform, but even they bend to logistics. A tonne of plasterboard delivered to a seventh-floor Paris walk-up isn't priced the same as the same tonne unloaded at a detached house with a driveway. A calculator that averages away those facts isn't wrong in some abstract sense, it's wrong in the specific sense that your estimate has nothing to do with your project.

How we model it

PlanVue carries a regional coefficient for every French department. When you submit a project, we key off your postal code, look up the matching coefficient, and apply it to the base line items. The number you see accounts for where the work is actually happening.

Some of these coefficients come from published professional references and trade association data. Others come from triangulating real counter-quotes that artisans return through our platform, when a professional reviews a PlanVue estimate and either confirms it or pushes back with their own pricing, we can calibrate. Over time, the coefficient you hit for your department converges toward the real cost of hiring somebody qualified in your specific market, not the national fiction.

What still isn't captured

We don't pretend this is a finished model. A few things it doesn't do yet:

• Urban vs rural within a department. The 13th arrondissement and a village in the Essonne share a regional coefficient that washes over real intra-department variation. We're working on a finer grain.
• Seasonality. August availability in a tourist region skews both lead times and prices. The coefficient doesn't flex for that.
• Specific micro-markets. Historic-monument work, eco-restoration, and some technical specialties price independently of the regional curve. We flag these where we can, but the coefficient isn't the right tool for them.

The honest framing is this: a national average tells you almost nothing about your renovation. A regional coefficient tells you substantially more. A proper on-site visit from a qualified professional tells you the actual number. Our job is to get you from the first to a defensible second, so you walk into the third prepared.

The practical upshot

When you use PlanVue, the estimate you see already accounts for your department. If you live in Paris, it accounts for Paris. If you live in the Ardèche, it accounts for the Ardèche. You don't have to mentally add a "city premium" or subtract a "rural discount", we've done that for you.

This matters most when you're deciding whether a project is even in reach. A national-average estimate that lands at €18,000 and a regional-aware estimate that lands at €22,000 lead to very different conversations with your bank. We'd rather tell you the higher number up front than have you discover it on the third counter-quote.