Archived research v1. Preserved for reference; its assumptions have not been revalidated for the new research.
The original study
4 · Real estate
Edition dated 7 September 2026
💡 Rent is the variable that moves break-even the most. It is also the only one that can be negotiated.
Status of the assumptions
The rents and thresholds below come from the initial study. The 66–79% break-even points and the ceiling of €571/m²/year still need to be reconciled with the full income statement. An advertised rent does not demonstrate the building’s feasibility.
The rent ceiling
With a lean equipment setup, 14 Technogym machines at ~€200k rather than an overloaded €560k gym floor, the maximum sustainable rent in Paris rises to €571/m²/year. This is a counterintuitive result: reducing equipment spending creates room to pay rent. Equipment leases and rent compete for the same margin.
Paris vs southern Marseille
| Observed rent | Effect on break-even | |
|---|---|---|
| Paris 10th / 18th (repurposed building) | €300–385/m²/year | Break-even ~79% |
| Southern Marseille | €90–150/m²/year | Break-even ~66% |
Rent in Paris is 2.5 to 4 times higher than in southern Marseille. This is the model’s strongest lever, and it alone explains most of the difference in break-even.
Industrial premises vs office space
The same building rents at two very different prices depending on its classification. Industrial premises (a warehouse, former workshop or garage) rent at a fraction of the price of office space of the same size in a comparable location. A sports club’s use is closer to industrial premises than to office space. The property strategy is therefore to search in the lower-priced category and fund the conversion rather than rent in the higher-priced category. This is exactly what the Paris comparable does: repurpose an industrial building rather than lease office space.
The coworking threshold: €989 → €1,440/m²/year
The question: should coworking space be included from the start? The answer comes down to a threshold. Reselling space as coworking is worth around €1,440/m²/year in a reasonable market. The equivalent cost of renting those same square meters as industrial premises is around €989/m²/year. As long as that gap exists, coworking funds its own space and contributes to the core business. Below the threshold, it consumes space that would earn more as part of the club. Implication: coworking is not inherently premature. It depends on the local flexible-office market. In southern Marseille, where the underlying rent is low, the trade-off is more favorable than in Paris, but flexible-office demand is also thinner. This must be decided through fieldwork, not in the model.
What we are looking for
- 1,000 to 1,700 m² of usable space
- Ceiling height suitable for a gym floor and studios
- Industrial or mixed-use classification, not office space
- Within 15 minutes of a qualified catchment of managers and professionals
- One identified lead: a 1,335 m² property in Marseille’s 8th arrondissement
At the assumption of 1.5 m² per member, this property represents approximately 890 members. Its capacity must be validated against the program and peak-hour usage before applying the 1,200-member scenario.