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Individual Flats for Buildings Only – the Lego Effect

Insuring a flat can seem straightforward, but it works very differently from insuring a house. From legal ownership to shared responsibilities, factors like insurable interest and leasehold arrangements play a crucial role. Understanding why full-building cover is essential can help you avoid costly gaps in protection.

You can’t insure a single flat for “buildings” cover the same way you insure a house. Think of a block of flats like a Lego tower. If you only own a brick in the middle, you can’t fix your brick if the base of the tower crumbles or the roof goes missing.

Sounds simple – I’ll just insure the brick that I own. Unfortunately, it’s not that simple. To insure something, you must have an Insurable Interest. This means you must legally own the thing you are insuring. Since most flat owners don’t own the roof or the foundations, they cannot legally buy a policy to cover them. If the whole building falls down, an individual policy on just one flat wouldn’t pay to rebuild the shared structural parts.

In England and Wales, most flats are Leasehold. That means:

  • The Leaseholder owns the space inside your walls, but a Freeholder owns the actual building.
  • The Freeholder is legally responsible for buying one property insurance policy that covers the entire building. They then charge you a portion of the cost through a service charge.

The risk is, if you try to buy your own separate buildings insurance, it won’t cover the common areas (like the hallways, or roof), and your mortgage lender won’t accept it because it doesn’t protect the whole structure. 

The solution can be quite simply, and can be done several ways, depending on the situation. 

If there is a ‘freeholder’ in the picture, this makes life simple. The ‘freeholder’ is to insure to insurer the building as a whole (including common areas, grounds etc), then charge appropriately back in the terms of the leasehold. 

Should a situation arise where the leaseholders own a portion of the freehold (meaning that there is no ‘freeholder’ in the picture), an additional step would need to take place. The ‘Leaseholders’ would need to form a separate entity (in the form of a Residential Management Company), where the limited company would own the ‘Freehold’, and the leasehold would be given back to the individual lease holders. Essentially, the whole building can then be insured under the new Residential Management Company entity, noting the interest of the individual lease holders. 

The system in Scotland is different because most flats are Freehold (often called Tenements).

How it works:

  • The flat owned outright and own a “share” of the common parts (the roof and hallways).
  • By law, you must have buildings insurance. While you can technically buy an individual policy, it is highly discouraged.
  • If there are four flats in a block and only three have insurance, the building can’t be fully rebuilt after (let’s say) a fire.
  • The “correct” way is for all owners to agree on a Common Policy. This ensures the entire building is covered under one contract, avoiding any gaps in cover.

Understanding how flat insurance works is key to making sure you’re properly protected. 

Author: Matt Owen-James

Published: 14/04/26

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