The Avalanche Effect: Why Rent Controls Trigger Bigger Problems Than You’d Expect

Picture standing at the top of a snowy hill. You nudge a small snowball over the edge. Harmless, right? But halfway down, it’s no longer a snowball. It’s an avalanche.

That’s what rent controls often do to rental markets.

It Starts Small…

Rent freezes get introduced in response to rising living costs. Politicians celebrate, headlines cheer, and many tenants breathe a sigh of relief.

But beneath the surface, small changes start to happen:

• Landlords quietly exit the sector.
• Tradespeople are less likely to take on maintenance work for lower-paying jobs.
• Developers shelve projects.
• Properties get withdrawn from the market or converted to short-term lets.

None of this happens all at once. It builds slowly — until suddenly, there’s a crisis. That’s the avalanche.

Real-World Examples

In Berlin, the rent cap caused rental supply to shrink by around 50% in just a couple of years. Prices for unregulated apartments increased as demand flooded into the smaller available pool.

New York saw similar distortions, where tenants in regulated apartments clung to spaces for decades, while new renters faced eye-watering prices for far smaller homes.

Scotland Is Already Seeing Early Signs

Since emergency rent controls were introduced, property sales listings from former rental properties are up. Ask letting agents in Edinburgh or Glasgow, they’ll tell you: landlords are nervous. And nervous landlords lead to fewer homes.

The Avalanche in Behavioural Terms

Behavioural economics tells us that people make decisions based on incentives, not rules alone. If you remove the incentive to provide well-managed rental homes, people will stop providing them. Simple as that.

What Can Be Done Instead?

👉 Build more homes — fast.

👉 Support small landlords with fair frameworks.

👉 Offer direct support to renters in difficulty, rather than blunt policies that hit the whole market.

We don’t want to be standing at the bottom of this hill, wondering how that little snowball turned into a disaster. The avalanche can still be avoided.