Vacant Offices in Paris (2026): Market Analysis and Hotel Conversion

Paris is short of housing. Paris is short of affordable hotels. And yet the Île-de-France region is drowning in empty offices — on the order of 4 to 5 million sq m of vacant office space in mid-2026, per ORIE and Immostat, a historic high. Remote work cut demand, companies fled obsolete floorplates for new "green" buildings, and a chunk of the older stock simply won't re-let.

This article is refreshed monthly: the market figures shift quarter by quarter, but the mechanics don't. And it's the mechanics that decide whether an empty office is worth converting into a hotel.

This is the mistake that costs the most. The headline figure — "5 million empty sq m" — means almost nothing, because Paris vacancy is wildly heterogeneous.

• Paris CBD (the central business district — 1st / 2nd / 8th / 9th) stays tight: low vacancy, high rents. An office there is too expensive, and too much in demand, for a hotel conversion to pencil. That's not where to look.
• La Défense and the inner ring (Péri-Défense, Nanterre, parts of the 92 and 93) hold most of the oversupply: double-digit vacancy, obsolete 1980s-2000s stock, whole buildings that no longer find a tenant.
• Paris outside the CBD (12th, 13th, 15th, 17th, 19th, 20th): in between — pockets of vacancy in older, poorly-connected buildings.

The upshot is counter-intuitive: the best candidates for hotel conversion are not in central Paris but at its edges, where land values have dropped but tourist and business demand is still real. An investor hunting for "an empty office in central Paris" is looking in the wrong place.

This isn't a cyclical dip, it's a structural shift. Three forces stack up:

• Remote work erased part of demand. Two to three days a week out of the office, now normalised, mechanically shrink leased space. It won't return to pre-2020 levels.
• Flight to quality. Companies that move take new, well-served, energy-efficient buildings — and leave behind 1990s floorplates nobody wants. Vacancy concentrates on that stock.
• The tertiary decree and energy ratings. The obligation to cut tertiary buildings' energy use will eventually condemn the worst performers: the owner must either refurbish heavily… or change the use. Conversion becomes an exit, not a whim.

In other words: a growing share of the office stock will never re-let as offices. Its owner has three options — refurbish at a loss, sell into distress, or convert. Only the third rebuilds value.

Office-to-housing is the conversion everyone talks about — the City of Paris pushes it, the law encourages it. Yet it's often the least profitable, and here's why the hotel route deserves a first look:

• Yield per sq m. A well-run hotel produces far more revenue per square metre than standard residential letting — the whole logic of the nightly rate versus the monthly rent. On the same building, the hotel equation often wins.
• No change of use, no compensation. This is the decisive technical point. Turning an office into a hotel is a change of destination that stays within the non-residential sphere. It does not trigger the French change-of-use regime or the duty to buy commercialité — the cost that sinks so many furnished-tourist projects. The office starts with one handicap fewer.
• Demand. Paris remains the world's leading tourist destination, and the legacy of its major events has durably lifted footfall. On the right locations, hotel occupancy holds.

Housing isn't ruled out — but it gets compared, not assumed. We cost both when the building allows it.

Converting an office into a hotel isn't "a permit." It's three distinct regimes, assessed separately — and that's where real feasibility is decided:

• Planning — the change of destination from the "office" sub-destination to "hotels." A prior declaration, or a building permit as soon as works touch the structure or façade. On a whole building, almost always the permit.
• Public-building rules (ERP) — fire safety and accessibility (type O). This is the real arbiter: an office floorplate has neither the escape routes, nor the fire compartmenting, nor the accessible rooms of a hotel. It's the item that makes or breaks the project.
• The fabric — structural grid, ceiling height, façade, a second staircase. A deep office building, blind at its core, yields windowless rooms: unusable.

We detail this on our change of destination to hotel page, and the full conversion of a building in the article on turning a building into a hotel.

An empty office isn't judged in square metres bought, but in keys actually buildable. Between the floor area and the area sellable as room-nights sit the circulations, the second staircase, the plant rooms, the reception, and the rooms that fall away because they have no window.

The question fits in one sentence: does the number of buildable keys, times the local value per key, cover acquisition, works and carry? A shallow office floorplate, four storeys with two staircases and a decent façade, converts well. A thick 1980s block with a blind core often doesn't — whatever its purchase price. That's the verdict we deliver before you commit anything.

Section refreshed monthly. Always check the latest release from ORIE, Immostat and the major advisors (JLL, CBRE, BNP Paribas Real Estate, Cushman & Wakefield) for the current quarter.

• Île-de-France vacant stock: on the order of 4 to 5 million sq m, a historic high, heavily concentrated on La Défense and the western inner ring.
• Paris CBD: low vacancy, tight market — off-target for conversion.
• Dynamics: the oversupply of obsolete offices is worsening under the combined effect of remote work, flight to quality and the tertiary decree. Conversion (housing, hotel, managed residence) is increasingly cited as the only way out for poorly-located second-hand stock.

The exact figure matters less than the trend: there is, in Paris and at its gates, a growing volume of office buildings that will not become offices again. A fraction of them will make excellent hotels. The work is identifying which.

Whether you're a landlord with vacant stock on your hands, an investor hunting an asset to reposition, or an owner cornered by the tertiary decree: the first question isn't "what does it cost," but "is it feasible, and in how many keys."

We assess all three regimes — planning, ERP, fabric — from the study stage, and we tell you plainly when a building doesn't convert. That's as useful to hear before acquisition as after. The feasibility study is free; the dossier is billed on success only for hotel-type accommodation, and on a quote basis for a classified hotel.