Continuous Change with "allt"
When discussing trends, like shifts in the housing market, you often need to describe progressive, continuous change. In English, we express this by saying things are getting "increasingly expensive" or "more and more expensive."
In Swedish, this is done by placing the word allt immediately before a comparative adjective.
You can use this pattern with any comparative adjective to describe a developing situation, such as the impact of interest rates or economic crises.
General Trends
You can also combine this structure with the dummy subject det to describe broad societal trends, such as urbanization and people moving away from the countryside.
Longer Adjectives and "allt mer"
Some longer adjectives and participles do not use the -are ending for their comparative form, but instead use the word mer (more). To express continuous change with these adjectives, you simply use allt mer.
A highly relevant word when discussing urbanization and the housing market is trångbodd (overcrowded).
Increasing Numbers with "allt fler"
If you want to say that "more and more" people or things are doing something, use allt fler. Fler is the comparative form of många (many) and is used for countable nouns like residents or apartments.