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Roof Replacement Cost Calculator UK

A Site For Estimating The Cost of Your Roof Replacement Project

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Try This Easy-To-Use, Instant Roof Replacement Cost Calculator UK

Get your instant estimate in 3 easy steps:

  1. Choose the type of roofing installation selecting the appropriate option.
  2. Estimate the size of the project in square metres (m2).
  3. Get the estimated project cost as a guide to assist your planning.

1. Type of roofing project

How much does a UK roof replacement cost in 2025?

Checkatrade’s member survey results: ‘What’s the cost of a roof replacement’?

According to Checkatrade, the UK average cost of a roof replacement is £7,000.

Factors affecting cost of a roof replacement:

  • Components – solar panels and Velux windows.
  • Design reconfiguration – increasing complexity from flat roof to pitch roof.
  • Project length: more labour hours and hire time of equipment like scaffolding etc.
  • Materials and finish: quantity and quality of material (design plays a part influencing how much material is used)
  • Support services: scaffolding, removing materials inc. skips

UK homeowner roof replacement cost example 2025

Here’s an example roof replacement cost from a homeowner sharing in a Reddit forum ‘A guesstimate for a new roof’:

Comment
byu/AndrewJ1614 from discussion
inDIYUK

A breakdown of each cost element from the roof replacement case study above:

Total project cost: £11,500

  1. Location: market forces affect pricing e.g. North Wales
  2. Style of building: dictates the complexity of roof structure e.g. 3 bed mid terrace
  3. Outer covering: primary material cost influences longevity e.g. slates
  4. Structural replacements: to improve long term integrity e.g. battens
  5. Roof protection: preventing ingress and rot e.g soakers, eaves trays, membrane, flashings
  6. Temporary structure: providing safe roof access e.g. scaffolding
  7. Roof insulation: upgrade for better energy efficiency e.g. 270mm insulation
  8. Labour: how many ‘man-hours’ the pro will require e.g. 2 roofers
  9. Duration: each day on site will add equivalent labour unit cost e.g. 5 days
  10. Guarantee of materials and workmanship: protecting the return on investment e.g. warranty, insurance

*n.b. the obvious omission from the details above would be waste disposal i.e. skip hire, which of course, is an additional cost.

Example breakdown of roof replacement cost 2025

This breakdown from Manchester Roofers Ltd. illustrates the kind of itemisation you might expect to see on a roof replacement quote:

(Source: Manchester Roofers Ltd.)

The median total cost of the roof replacement quote above is approximately £13k. (*Not far away from the £11.5k price paid by the homeowner quoted further up this page).

Whilst we don’t know the exact roof design and size quote above, working on an assumption of averages, we can say that a more accurate roof replacement cost for a domestic residence in the UK could be above £10k.

How does roof replacement cost vary across England?

The average (median) cost to replace a roof in the UK is £7,500, with London being the most expensive at ~£10,000.

(Source: Roofers Surrey Ltd)

Cost of replacing various styles of roofs

(Source: bnlroofing.co.uk)

Again, size and complexity of roof design are the most influential factors affecting roof replacement cost.

You pay considerably more for hips and valleys, which add surface area, time and material cost.

For example, a detached roof typically could cost up to twice as much as a terraced roof.

Roof replacement cost: FAQs

Is it worth spending more on better-quality roof tiles?

(Source: bnlroofing.co.uk)

You might pay three times as much for more durable slate roof tiles vs concrete tiles. But in the long run this ‘additional cost’ returns dividends in a longer-lasting finish. A slate roof could last up to 5 times as long compared to a concrete tiled roof.

Is old roof removal included in the cost of roof replacement?

It’s important to examine the items included within the scope of your roof replacement cost quote.

Here’s a quick guide to help you determine the cost of this element of the project:

(Source: bnlroofing.co.uk)

As seen above, the labour cost of roof removal adds considerable expense to the project. And even more so, waste disposal.

In fact, old roof removal on average will cost a quarter of the cost of the new replacement materials. And waste disposal can cost as much as twice the cost of a quality slate roof replacement.

Do roofers charge hourly or day rates?

Roofing companies will quote hourly rates for small jobs that a single roofer will typically finish before the day is done, and day rates for teams on-site for longer projects.

Here’s what Tim Phillips, Chartered Quantity Surveyor and columnist at the Home & Renovating Magazine has to say on roofer rates…

(Source: Home and Renovating Magazine)

How much will the complexity of the roof structure add to the cost of a roof replacement?

Where the roof design is more complex i.e. joins etc. more material and efforts will be applied to ensure integrity and avoidance of water ingress.

Here’s what Tim Phillips, Quantity Surveyor, has to say about that:

(Source: Home and Renovating Magazine)

What are the hidden costs of roof replacement projects?

The main source of unforeseen costs within roof replacement projects is undetected structural damage that otherwise would be invisible without opening up the roof. This is especially probable for older roofs built using less effective solutions:

(Source: Home and Renovating Magazine)

This advice emphasises the importance of investing in a better quality installation.

The more durable the job, the less ingress and the longer the delay to paying for your next roof replacement.

How much does asbestos removal cost in a roof replacement project?

According to Tim Phillips, MD of Quantiv (Quantity Surveyor Consultants)…

…the discovery of asbestos in the fabric of your roof can add significant delay, cost and legal requirement to your roof replacement project:

(Source: Home and Renovating Magazine)

How much can you save by adding a solar panel installation whilst replacing a roof?

If you’re planning a roof replacement, you may be asking yourself the question: “Should I install solar panels at the same time?”

Here’s a recommendation via the House Extensions, Loft Conversions and Renovations UK Facebook Group:

facebook comment will you save money installing solar panel whilst replacing your roof

(Source: House Extensions, Loft Conversions and Renovations UK)

According to this recommendation, not only can homeowners save on the cost of roof tiles equal to the area of the solar installation, but also on the grid-power costs replaced by micro-generation.

Do roofers have to visit your property to produce an accurate job quote?

The short answer is: No.

But here’s the workaround given by a forum member of the House Extensions, Loft Conversions and Renovations UK Facebook Group:

facebook comment on how roofers can estimate roo replacement project costs by counting roof tiles via Google Street View

(Source: House Extensions, Loft Conversions and Renovations UK)

Google Street View is the perfect remote roof tile estimator tool. Preventing costly on-site surveys and saving the cost of roofers’ quoting on replacement projects.

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