Nobody likes thinking about a worst case scenario.
But the UK has seen enough real-world “how did this get so expensive?” moments to know this is worth a quick check.
If a major storm like the late-1980s UK events hit again, a lot of households could find their home insurance is set too low to cover the cost of putting things right.
That usually only becomes obvious when you try to make a claim.
This is general information only, not personal advice.
Always check your policy documents and ask your insurer if you are unsure about your level of cover.
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Home insurance and the real “worst case” risk
Most home insurance problems are not about whether you have cover.
They are about whether you have enough cover.
A lot of home insurance policies are set up quickly at the start, then left on autopilot.
Over time, building costs rise, trades get pricier, and the structure of your home still needs to be insured for the right amount.
If you are underinsured, insurance can cover only up to the limit you chose.
That can leave you funding the gap yourself, even if the event itself is covered by your insurance policies.
Buildings insurance cover: rebuild cost vs market value
Here’s the big one.
Your rebuild cost is not the same as what your home might sell for.
Home insurance for buildings is usually about what it would cost to completely rebuild the property from scratch.
That includes demolition, clearing the site, materials, and the cost of labour.
A sensible way to think about it is this:
| What you’re looking at | What it means | Why it matters for home insurance |
|---|---|---|
| Market value | What someone might pay | Doesn’t equal build cost |
| Rebuild cost | What it costs to rebuild | Drives your buildings sum insured |
| Mortgage balance | What you owe | Not the same as the rebuild figure |
Your buildings sum insured is the number that needs to match the rebuild figure as closely as possible.
If it is too low, your buildings insurance cover might not stretch to the cost of repairing or rebuilding after serious loss or damage.
Some people use a building cost information service to estimate rebuild figures.
That can be a helpful starting point.
Need buildings insurance because of a mortgage? Watch the trap
If you have a home with a mortgage, you will often need buildings insurance as part of the deal.
That’s normal.
The trap is assuming the mortgage amount is the right figure to insure.
The balance usually goes down over time.
The cost to rebuild can go up.
So if you set your home insurance around what you owe, you can drift into underinsurance without noticing.
The aim is to have buildings insurance in place that matches the rebuild cost, not the mortgage balance.
This is one reason I always suggest you review your home insurance each year, even if you do nothing else.
Buildings and contents: what each part actually covers
People often buy buildings and contents insurance because it is convenient.
A combined buildings and contents home policy can be simpler to manage.
But it helps to understand the split:
- Buildings insurance generally deals with the fabric of the property.
- Contents insurance covers the stuff you would take with you if you moved.
In plain English, buildings insurance covers the structure plus things like a fitted kitchen and bathroom.
That includes many fixtures and fittings, like built-in units and permanent flooring.
A single fixture can be expensive, and fixtures and fittings add up quickly in a big repair.
Meanwhile, contents insurance focuses on your belongings and the value of your contents.
Contents cover might include things like furniture, laptops, and home entertainment equipment.
Contents insurance can help when the problem is inside the home, even if the building itself is fine.
If you are choosing buildings and contents home insurance, check the limits for both parts.
If you only want buildings, you can still get buildings insurance on its own.
Improvements, an outbuilding, and the cost of repairing damage
Over time, most homes change.
Extensions happen.
Loft conversions happen.
A new kitchen, better glazing, or a garden office happens.
If you add value to the property, your home insurance needs to keep up.
That includes any outbuilding you want covered, like a garage, workshop, or garden room.
This is where extra insurance sometimes comes in.
For example, you might need to add cover for a higher rebuild figure, or for specific items, or for accidental damage.
On many home insurance policies, accidental damage is optional.
Accidental damage can be useful for everyday mishaps, like putting your foot through a ceiling or spilling paint on a carpet.
Just be clear what accidental damage cover actually includes, because it varies between insurance policies.
If the worst happens, you want to know your insurer will cover the full scope of the repair.
In practice, that means the policy limit should allow for the cost of repairing damage properly, not patching it up cheaply.
In some policies, the wording is explicit: buildings insurance covers the cost of certain repairs up to the insured amount.
So the insured amount matters a lot.
Excess, inflation, and insurance cost creep
Your excess is what you pay towards a claim.
If your excess is low, you may be more likely to claim for smaller issues, which can affect pricing.
If your excess is high, you may handle more repairs yourself, which can feel painful in the moment.
There’s no perfect answer.
It depends on your budget, your risk tolerance, and the cover you need.
Also keep an eye on how renewals change.
Your insurance cost can creep up year on year, even if nothing changes.
That is one reason people shop around using a home insurance comparison service to get a better deal.
You might also see “cheap building insurance” promoted heavily, but I’d focus on the right cover first, then price.
Quick checklist before you get a quote
If you are about to get a quote, or you want a quick sense-check on your current home insurance, here’s what I’d look at.
- Is the rebuild figure realistic for the age of your home and local build costs?
- Does your policy include the buildings cover you expect, including any outbuilding?
- Are you clear on the split between buildings and contents?
- Do you need contents insurance, and does it reflect the value of what you own?
- Is home emergency included, and if so, what counts as an emergency?
- Do you want home emergency cover specifically, or would you rather self-fund call-outs?
- Is legal cover included, and is it useful for your situation?
- Does the policy cover damage to the structure and common causes of damage to your home?
- Have you checked the excess and the claim conditions before you make a claim?
If you are shopping around, try to compare like with like.
A home insurance quote that looks cheaper can sometimes be thinner on cover.
A buildings insurance quote should always be judged against the rebuild figure and the exclusions.
If you want to buy buildings insurance, aim for the right limits first, then look for savings.
If you are renting out a property, it is worth flagging this too.
A landlord often needs different home insurance compared to an owner-occupier.
That is where landlord insurance comes in, because insurance that covers tenants and rental risks can be different.
If you’re unsure what you need, start by listing what you want to protect.
That includes your home and belongings, not just the mortgage paperwork.
FAQs
Is buildings insurance for my home based on the mortgage amount?
Usually not, and it shouldn’t be. Your home insurance needs to reflect rebuild cost, not what you owe on your mortgage.
Do home insurance policies automatically include accidental damage?
Often they don’t. Many home insurance policies treat accidental damage as an optional extra, so it is worth checking.
What does contents insurance cover?
In general, contents insurance covers your belongings inside the home, up to the policy limits.
Cost of replacing items is often part of the wording, but the details vary across insurance policies.
Should I choose buildings and contents insurance or separate cover?
A buildings and contents insurance policy can be convenient, and many people like a single renewal date.
Just check both limits, because underinsuring either side can still cause problems.
What if I need to make a claim after a big storm or flood?
Follow the steps in your policy documents, take photos, and notify the insurer quickly. If you have questions, ask the insurer what evidence they need for the insurance claim.
Get your home insurance set to a realistic rebuild figure, keep it updated after changes, and compare insurance quotes now and then to sanity-check the deal.
