In London, a seven square meter apartment is to be auctioned off at a starting price of 50,000 pounds (a good 60,000 euros).
However, the one-bedroom apartment is expected to go under the hammer for a much higher sum, having already bought the flat in 2017 for £103,500 (more than €124,000), Britain's Guardian daily reported this week.
The micro-apartment includes just space for a bed with some storage underneath, a microwave, a fold-out table, toilet and shower.
There is no room for visitors, extensive cooking or hobbies.
The apartment can be found on the British online auction site for real estate MyAuction.
Currently, the recently refurbished flat in East London's Lower Clapton is used by a commuter just one or two days a week, for which the report says she pays around £800 (around €960) a month in rent.
The sellers assume that it is the smallest apartment in the British capital's competitive market.
Julia Rugg, a housing expert at the University of York, described the offer as symbolizing a "worrying development".
Micro-apartments should not be seen as a way out of the housing crisis because they are not a sustainable place to live.
For example, people there are increasingly dependent on disposable products because there is no kitchen equipment.