Roof Replacement Cost in the UK (2026 Prices)

Roof Replacement Cost in the UK (2026 Prices)

Most people searching this have just had a roofer knock on their door, spotted a damp patch on the ceiling, or had someone quote them a number that made them want to sit down. This guide will tell you what a roof replacement actually costs in 2026, what drives the price up or down, and what to watch out for before you sign anything.

What does a new roof actually cost?

For most homes in the UK, a full roof replacement sits somewhere between £4,000 and £15,000. That range sounds useless, but the gap exists for a reason. A small terraced house in Basingstoke is a very different job to a large detached in Wimbledon.

In London and the South East, expect to pay around 15 to 25 percent more than the national average. Labour costs more here, materials take longer to deliver, and parking a van and scaffold in a residential street adds time to every job.

Here are realistic figures by property type:

These figures assume a standard pitched roof being replaced like-for-like. If you're changing materials, adding insulation, or there's structural damage underneath, costs go up.

How roofers price the work

Most quotes come back as a cost per square metre. For a standard pitched roof in the South East, you're looking at £100 to £130 per m² for labour and materials combined.

Your roof area is roughly your home's footprint multiplied by 1.2 to 1.5, depending on the pitch. A semi-detached with a 60 m² footprint probably has around 75 to 85 m² of actual roof to cover.

What material are you replacing it with?

The material you choose has one of the biggest impacts on total cost. Here's how the main options compare:

Concrete tiles

The most common choice on UK homes. Concrete tiles cost £90 to £115 per m² installed. They last 30 to 50 years, come in plenty of colours and profiles, and are straightforward to source and fit. Moss can build up over time in damper areas, but that's manageable with periodic cleaning.

Natural slate

Slate costs more upfront at around £130 to £170 per m² installed, but it lasts well over 100 years if the work is done properly. It looks better than concrete on most properties and is often required in conservation areas. Heavier than other materials, so the roof structure needs to be sound.

Clay tiles

Clay sits between concrete and slate on price, coming in at around £110 to £150 per m² installed. They're common in the Chilterns, Cotswolds and parts of Surrey where the look fits the local architecture. Lifespan is 50 to 100 years.

Metal roofing

Steel and aluminium roofing has become more popular, particularly on extensions and contemporary builds. Costs run £100 to £150 per m² installed. Low maintenance, lasts 40 to 70 years, and handles wind well.

Flat roofs

Flat roof replacement is cheaper per square metre but the material choice matters a lot:

If you have a flat roof, felt is the cheapest option but you'll likely be replacing it again within 15 years. GRP or EPDM costs more initially but it's the better long-term decision for most homeowners.

The costs most quotes don't mention upfront

This is where people get caught out. A quote that looks reasonable can grow once the job starts. These aren't surprises a good roofer should spring on you, but they are things worth asking about before work begins.

Scaffolding: Almost every roof replacement needs it. Budget £800 to £1,500 for a standard semi-detached. Some contractors include this, many don't. Always check.

Stripping and disposal: Removing the old roof covering and taking the waste away costs £20 to £40 per m² depending on how many layers there are. For a 70 m² roof that's potentially £1,400 to £2,800 on top of the replacement cost.

Structural repairs: Once the old covering comes off, you might find rotten timbers, damaged rafters or failing decking underneath. This can't be priced until the roof is stripped. Set aside a contingency of £500 to £2,000 on older properties, just in case.

Fascias, soffits and guttering: Many homeowners replace these at the same time as the roof because the scaffolding is already up and it's cheaper than doing it separately later. A full uPVC fascia and soffit replacement on a semi-detached typically adds £1,500 to £3,000.

Insulation: If your loft insulation is inadequate or damaged, replacing it while the roof is open makes sense. Budget £300 to £800 depending on the area.

Chimney work: If the property has a chimney, get it inspected while roofers are already up there. Repointing or minor repairs typically cost £300 to £800.

What if there's spray foam insulation in the roof?

This is worth a separate mention because it catches a lot of homeowners off guard. If someone previously had spray foam insulation applied in your roof space, it needs to come out before any roofing work can be done. Most mortgage lenders also won't approve a property sale until it's removed.

Spray foam removal costs between £1,500 and £4,000 for an average home and adds time to the job. If you're not sure whether you have it, it's worth checking before you get quotes, as it will change the scope of the work significantly.

Alliance Roofing carries out spray foam removal across all our service areas. [See our spray foam removal service for more detail.]

What does it cost where you are?

Prices vary across the areas we cover. Here's a rough guide for a standard semi-detached house:

How long does a roof replacement take?

Bad weather, scaffolding delays, or structural issues found during stripping can all extend the timeline.

Should you repair or replace?

Not every roof problem needs a full replacement. If the damage is isolated to a handful of broken slates, a section of failed flashing or a small flat roof section, repairs are usually the right call.

The point where replacement makes more sense is when more than 25 to 30 percent of the roof covering is failing, when the underlying timbers are compromised, or when the roof is old enough that patching it just delays the inevitable and costs you more in the long run.

A good roofer will tell you honestly which one applies to your situation. If the first quote you get goes straight to full replacement without inspecting the roof properly, get a second opinion. [See our roof repairs service if you're not sure yet.]

What to look for when getting quotes

Three quotes is the standard advice and it's right. But knowing how to compare them matters more than the number of quotes you collect.

Things to check before hiring anyone:

• Public liability insurance: ask to see the certificate, not just their word for it
• A written, itemised quote that separates materials, labour, scaffolding and disposal
• A workmanship guarantee of 10 years minimum from a reputable contractor
• NFRC membership or equivalent trade body registration
• References or examples of recent work in your area

Walk away from anyone who wants a large cash deposit upfront, won't give you a written quote, or tells you the roof needs replacing when they haven't looked at it properly.

Common questions

Does home insurance cover roof replacement?

‍Buildings insurance covers sudden damage such as storms, falling trees or fire. It doesn't cover wear and tear or a roof that's simply come to the end of its life. Check your policy before assuming you're covered.

When is the cheapest time to get a roof replaced?

‍Late autumn and early spring tend to be quieter for roofing companies. You're more likely to get availability and potentially better pricing than in peak summer when every roofer is booked solid.

How long will a new roof last?

‍Concrete tiles: 30 to 50 years. Clay tiles: 50 to 100 years. Natural slate: 100 years or more. Metal: 40 to 70 years. Felt flat roofs: 10 to 15 years. GRP or EPDM flat roofs: 25 to 40 years.

Is a roof replacement worth it before selling?

‍Usually yes, if the roof is visibly failing. Buyers and surveyors will flag it, lenders may refuse to lend against it, and you'll lose more on the sale price than you'd spend on the replacement.

Get a free quote from Alliance Roofing

Alliance Roofing covers London, Surrey, Berkshire, Buckinghamshire, Oxfordshire and Hampshire. We provide free, written quotes with a full breakdown of costs with no vague estimates and no hidden extras.

If you'd like us to take a look and tell you honestly what your roof needs, get in touch and we'll arrange a convenient time to visit.