When you apply for home insurance in the UK, you’re often asked for two numbers: your rebuild cost and the value of your contents.

These figures impact how well your home and belongings are protected, so it’s important to get them right.

This guide explains what rebuild cost means, how to work it out, and how to estimate the value of your contents, whether you own your home or rent.

What is a rebuild cost?

Rebuild cost is the amount it would take to rebuild your home from scratch if it were destroyed. For insurance purposes, this is about construction costs and covers materials and labour. It’s not the value of your home if you put it up for sale, so does not include the value of the land.

That’s why your rebuild value for home insurance purposes can be different from the:

• Price you paid
• Current market value
• Amount you could sell it for

Why rebuild costs matter for home insurance

Buildings insurance is based on your rebuild cost, not your home’s market value.

If the figure is too low, you may not receive the full amount needed to rebuild your home in the unfortunate event that it’s severely damaged. If it’s too high, you could end up paying for more cover than you need.

The aim is a realistic estimate, not an exact number down to the last pound.

How to calculate rebuild cost for home insurance

Many insurers will calculate the rebuild cost for you based on publicly available information about your home. If they don’t, there are several ways to work out your rebuild cost:

Use a rebuild cost calculator Many homeowners start with an online rebuild cost calculator. These tools use details such as the type of property, its size and its location to give an estimate.

Check your mortgage valuation If you bought your home recently, your mortgage valuation may include a rebuild cost for insurance. It’s worth checking your paperwork first.

Review your property survey A homebuyer or building survey often includes details about how the property was built. This can help you work out a more accurate rebuild value.

Speak to a qualified surveyor For unusual properties, listed buildings or homes built with non-standard materials, a qualified surveyor can provide a more tailored rebuild estimate.

How much does it cost to rebuild a house?

The cost to rebuild a house depends on several factors, including:

• The size and layout
• The materials used
• The design
• Local labour costs

A small, modern house is usually easier to estimate than a large period property. The more specific you are about your own home, the more accurate your rebuild cost will be.

Calculating the value of your contents

Rebuild cost mainly applies to homeowners. Contents value matters for both homeowners and renters.

Contents insurance covers the things inside your home that belong to you. To work out how much cover you need, estimate how much it would cost to replace everything of value.

The simplest way is to go room by room. Think about:

• Living room: sofas, TV, laptops and small electronics
• Bedroom: clothes, shoes, bedding and jewellery
• Kitchen: appliances that are not built-in, cookware and utensils
• Hallway and storage: coats, luggage, tools and sports equipment

Small items are easy to forget. Together, they can add up to more than you expect. For valuable items, note what you paid or what it would cost to buy something similar today.

Why accurate contents value matters

If you underestimate your contents value, your payout may not cover the full cost of replacing your belongings.

If you overestimate it, you may pay for more cover than you need. Taking time to make a simple list can help you choose a sensible level of cover.

Summary: working out your rebuild cost and contents value

Rebuild cost is the amount it would take to rebuild your home from the ground up. It is different from the market value.

You can estimate rebuild cost by using a rebuild cost calculator, checking your mortgage valuation, reviewing a survey or speaking to a surveyor.

Contents value is the cost of replacing your belongings as new. This matters whether you rent or own.

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