Between the Hotel and the Lease, a Housing Market Measured in Months

When Airbnb reported its results for the final quarter of 2021, one figure stood out from the usual talk of nights and revenue. Stays of 28 nights or more accounted for 22 percent of gross nights booked on the platform, up from 16 percent in the same quarter of 2019, and nearly half of all nights came from stays of a week or longer, according to the company's shareholder letter. A platform built for weekend trips had discovered that a large share of its customers were not on holiday at all.

That finding pointed to a gap in how housing is organized. Hotels and short-term rentals are designed for stays measured in nights. The traditional rental market is designed for tenants who sign for a year or more, furnish the flat themselves and open their own utility accounts. A growing number of people need something in between: a furnished home for three, six or nine months while a job, a project or a family situation settles. Flex living, the industry's term for furnished, serviced housing let by the month, is being built to serve that middle.

A need that predates remote work

Remote workers made the category visible, but the demand is broader and older. Corporate relocation is one source. In Atlas Van Lines' 2026 corporate relocation survey of 549 decision makers, 38 percent of companies said they offered extended temporary housing benefits in 2025, citing housing shortages, high home prices and mortgage rates. Healthcare is another. Travel nursing contracts typically last 13 weeks, according to staffing firm AMN Healthcare, which means a steady flow of clinicians who need a furnished home for roughly a quarter of a year.

Immigration policy has added a third stream. Spain granted 27,875 digital nomad visas by the end of 2024, including 13,620 issued to spouses, children and parents of the main applicants, according to figures from the country's Immigration Observatory reported by The Local. A visa that allows a family to stay for a year produces a household that needs a kitchen, a desk and a lease, not a hotel room.

Students, researchers, people renovating their homes and people between a separation and a new purchase fill out the picture. What these groups share is not a lifestyle but a time horizon. They will stay long enough to need a functioning home and leave before a conventional lease makes sense.

Capital has noticed

The investment market has started to price that demand. Investment in Europe's living sectors reached 62.2 billion euros in 2025, up 22 percent on the previous year, and JLL expects it to exceed 70 billion euros in 2026, the firm said in a March 2026 report. The same report described affordability as at its worst level on record and projected that new housing supply in the largest markets would fall again in 2026 after declines of 11 percent in 2024 and 5 percent in 2025.

Spain offers a clear view of how flex living fits into that picture. In the first half of 2024, flex living investment in Spain reached 708 million euros, roughly three times the figure a year earlier and 47 percent of all living investment, according to CBRE data reported by Iberian Property. Madrid accounted for 83 percent of that volume. JLL counts about 19,000 operational flex living beds in Spain, with another 19,600 under development, which would roughly double the stock within three years, according to figures cited by the investment platform Urbanitae in December 2025.

Those numbers remain small next to the conventional rental market. They do show that institutional owners now treat furnished monthly housing as a distinct product with its own operators, financing and yields, rather than as a side use of holiday apartments.

Regulation is drawing the lines

Governments are also starting to treat stays measured in months as a category of their own. Spain's single rental registry, created by Royal Decree 1312/2024, made a registration number mandatory from July 1, 2025 for properties offered as temporary rentals, including both holiday lets and seasonal rentals advertised on platforms, and listings without one can be removed.

The effect is to push the segment toward professional operators who can document their properties, sign proper contracts and comply with tax and planning rules. For tenants, it makes the difference between a registered furnished rental and an informal sublet easier to see. For cities, it creates data on a part of the housing market that used to be largely invisible.

Why the quality of the stay matters

The practical consequence of a longer stay is that housing stops being a backdrop and becomes the setting for ordinary life. A guest staying three nights will tolerate a weak connection, a small kitchen or a noisy street. A tenant staying five months works from the apartment, cooks there most days and depends on the neighborhood for groceries, transport and exercise. Reliable internet, a real desk, laundry and predictable monthly costs move from nice to have to essential.

That is also why the category is better understood as infrastructure than as a niche of travel. Companies use it to move staff without waiting for permanent housing. Hospitals use it to staff wards during shortages. Visa programs implicitly rely on it, since many require proof of accommodation that a nightly booking does not provide. When the furnished middle of the market works, those transitions are faster and less costly. When it does not, people fall back on hotels they cannot afford or informal arrangements with little protection.

What to watch

The segment faces real constraints. Supply is concentrated in a few large cities, Madrid being the clearest example in Spain. Regulation is still evolving, and rules written with tourist rentals in mind can catch genuine monthly housing. Operators must also show that a furnished, serviced product can be run at scale without the service quality that justifies its premium slipping.

The direction is nonetheless clear. Between the hotel and the permanent lease, a third type of housing is forming around stays measured in months, and it is drawing tenants, capital and regulation at the same time. RentRemote lists furnished apartments for monthly stays from professional operators, including in Madrid and Barcelona.