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If you’re planning to install a flat roof on your home, it’s handy to know the average flat roof cost. The amount you pay for your flat roof will vary based on a range of factors. So, before you set a budget, consider the following:

• Size of roof - The larger your new flat roof will be, the higher the cost.

• Materials used - Flat roofs can be covered with a range of materials including felt, rubber and asphalt. Each material will have a different price.

• Condition of roof - If your current roof is in poor condition, extra work will be needed before fitting your flat roof. This will come at an extra cost.

• Height of roof - The higher your flat roof is, the longer labour will take, increasing the installation cost.

• Accessibility - If your flat roof is difficult to access, scaffolding may be needed to complete the job. This will be an additional cost.

Flat roof cost per m2

Budgeting for your new flat roof can be tricky so it may help to know the average flat roof cost per m2. You can expect to pay between £126 and £184 depending on how you choose to finish your roof.

How much does it cost to replace a flat roof?

If you already have a flat roof, it’ll be less expensive to simply replace it with another flat roof than to install an entirely new flat roof. Having said that, the amount you pay will still vary depending on the size of the roof, condition of the roof and the materials you choose. The average flat roof replacement cost is between £1,500 and £4,500.

What are the advantages of a flat roof extension?

Adding an extension to your home is a great way to increase your living space. One of the options available to you is to choose a flat roof extension and this comes with a range of benefits. These include:

• New room - You can choose to add an entirely new room to your home for example, why not add a home gym, an office or a utility room?

• Property value - Adding a flat roof extension will increase the value of your property.

• Storage - Flat roof extensions are a great choice to add storage to your home.

• Roof terrace - Choosing a flat roof extension allows you to install a roof terrace on top of the extension.

How much does a flat roof extension cost?

The amount you pay for your flat roof extension will vary depending on the following factors:

• Size of extension

• Materials used

• Shape of the extension

• Utilities needed

• Number and size of windows and doors

• Finishing touches

If you’re looking for a rough guide as to how much your flat roof extension will cost, the average flat roof extension cost is between £30,000 and £75,000. You can find more prices and information in our flat roof extension cost guide.

Replacing a flat roof with a pitched roof

Flat roofs are a great option, however, pitched roofs offer more space and many prefer their appearance. Luckily, it’s possible to transform your flat roof into a pitched roof for an average cost of £3,000-£4,500. For more advice and prices, check out our cost to replace a flat roof with a pitched roof guide.

Building a flat roof is a complex, time consuming job. So, if you don't have experience fitting roofs, we’d recommend hiring a professional to do the work. That way you’ll save time and energy while having the assurance that your roof is fitted to the highest standards. This is the best way of getting the most out of your flat roof.

Want to speak to flat roofers in SW18?

Ready to get started on your flat roof project? You’ll need to find an experienced flat roofing contractor you can depend on. Thankfully, our members go through a range of full checks to ensure they’re perfect for your job. They’re even recommended by your neighbours.

We can help you find flat roof specialists in SW18 in two quick, easy ways. One option is to use our free search feature. With just your postcode, we can show you a range of flat roofing companies in SW18.

Alternative, save time using our request a quote feature. Fill in our handy online form and we’ll send your information to three flat roofers in SW18. You can then get on with your day while they draw up three personalised quotes.