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Roofing Cost Calculator (UK)

Compare 2026 UK roofing costs across slate, tile, metal, asphalt and membrane on the same job. Side-by-side installed cost in £, £/m², service life and cost-per-year for British homes.

Prepared by the Roofing Calculator HQ editorial team. Review our formula, source and limitation standards.

Roofing Cost Calculator

Compare the full installed cost of every major roofing material — side-by-side — for the same job. Results show upfront cost, cost per unit area, and annualised cost over the material's service life. Currency and pricing are matched to your selected locale.

Cheapest upfront
£9,643
3-tab asphalt shingle
£69/m² · 22 yr life
Lowest cost per year
£251/yr
Clay tile
£18,813 upfront · 75 yr life
MaterialTotal/ m²LifePer yr
3-tab asphalt shingle£9,643£6922 yr£438
Architectural asphalt shingle£11,374£8130 yr£379
Corrugated steel sheet£12,782£9135 yr£365
Concrete tile£14,163£10150 yr£283
Premium / luxury shingle£15,293£10950 yr£306
Single-ply membrane (TPO/EPDM)£17,646£12622 yr£802
Wood shake / shingle£18,606£13330 yr£620
Clay tile£18,813£13475 yr£251
Standing-seam metal£20,514£14750 yr£410
Natural slate£30,702£219100 yr£307

Includes material, labour, tear-off, disposal, underlay, and permit. Excludes decking replacement, structural reinforcement, gutters, and skylight work — budget a 5–10% contingency.

What this calculator does

This calculator compares the full installed cost of every major UK roofing material — on the same job — so you can see upfront cost, cost per square metre, service life and cost-per-year side by side. Most cost calculators give you one figure for the material you’ve already picked. This one runs the maths for the full menu and ranks them cheapest-to-most-expensive, with the lowest cost-per-year material highlighted separately.

It is the right tool to use when you have a UK pitched roof to replace and you haven’t yet decided whether to stick with concrete tile, upgrade to natural slate, switch to standing-seam zinc, or stay with the cheapest interlocking option.

How to use it

  1. Enter the slope-adjusted roof area in square metres. If you only have the building footprint, multiply by the slope factor — our roof square footage calculator handles this.
  2. Set the pitch. Degrees is the UK convention. 30° is a typical Edwardian or Victorian terrace; 45° is a steeply pitched mid-century semi; 22.5° is a 1980s estate house with concrete interlocking tiles.
  3. Pick a region. Low — most of England and Wales outside the South East. Mid — the Midlands, North West urban. High — Greater London, the Home Counties, Edinburgh, and city-centre Bristol/Manchester where access and parking restrictions add to labour rates.
  4. Pick complexity. Simple — a clean gable or hip with no penetrations. Moderate — chimney stack plus one or two velux openings. Complex — multiple chimneys, dormers, valleys, and parapet abutments common on Victorian villas.
  5. Toggle tear-off + disposal if you’re replacing an existing roof.

The table updates instantly with prices in pounds. The “cheapest upfront” tile and the “lowest cost-per-year” tile rarely show the same material — that’s the whole point.

2026 installed cost by material — typical UK mid-region numbers

Material£/m² installed90 m² totalService life£/yr (90 m²)
Bitumen 3-tab shingle£35–£55£3,150–£4,95022 yrs£143–£225
Architectural bitumen shingle£55–£85£4,950–£7,65030 yrs£165–£255
Concrete interlocking tile£55–£95£4,950–£8,55050 yrs£99–£171
Concrete plain tile£75–£115£6,750–£10,35050 yrs£135–£207
Clay plain tile (machine-made)£95–£155£8,550–£13,95075 yrs£114–£186
Clay plain tile (hand-made)£140–£220£12,600–£19,800100 yrs£126–£198
Spanish/Welsh natural slate£85–£140£7,650–£12,600100 yrs£77–£126
Welsh-only natural slate£140–£220£12,600–£19,800125 yrs£101–£158
Standing-seam zinc£125–£195£11,250–£17,55080 yrs£141–£219
Standing-seam aluminium£110–£175£9,900–£15,75060 yrs£165–£262

Source data: 2026 NFRC member pricing benchmarks; Checkatrade and MyBuilder Q1 2026 regional roofing averages; BBA Agrément certificate-holder pricing for IKO, Marley, Redland, SIG; Welsh Slate, Cembrit, and CUPA Pizarras 2026 trade lists; UK Met Office wind-zone fixing-schedule cost differential per BS 5534.

Why “cost per year” beats “upfront cost”

A British roof is one of the longest-lived components of a house — and UK pitched roofs are typically replaced just once or twice in a 100-year building lifecycle. Spreading the install cost across the service life is the only sensible way to compare options.

Take a 90 m² mid-region replacement:

  • Concrete interlocking tile at £6,800 = £136/yr over 50 yrs.
  • Welsh natural slate at £15,000 = £120/yr over 125 yrs.
  • Standing-seam zinc at £14,500 = £181/yr over 80 yrs.

Concrete tile looks cheapest by a country mile upfront. But Welsh slate has the lowest annual cost despite costing more than twice as much on day one — and slate has the further advantage that it never needs the underlay-replacement cycle that catches out concrete-tile homeowners around year 30 (£28–£45/m² to strip, replace breather membrane, and re-lay the existing tiles).

The calculator surfaces the lowest cost-per-year material automatically.

Cost drivers in detail

Pitch. A 22.5° pitch is “walkable” with lifelines. A 30° pitch needs sole boards and harnesses — labour multiplier 1.05. A 40° pitch requires roof ladders and slow progress — multiplier 1.18. A 50°+ steep Mansard requires staging — multiplier 1.32. UK pitched roofs typically sit between 30° and 45°.

Tear-off and disposal. Stripping a 90 m² concrete-tile roof generates roughly 6 tonnes of waste; clay or slate generates 8–10 tonnes; bitumen shingles around 1.5 tonnes. Skip hire and tipping run £180–£280 per 8-yard skip in 2026, which the calculator absorbs into the disposal line.

Region. Greater London and the South East run 22–30% above national average on labour. Edinburgh, Cambridge, Oxford, Bristol: 12–18% above. Most of the Midlands and North: at or near average. Wales, Cumbria, parts of the North East: 8–15% below — though stone-built properties there often need expensive sarking-board replacement.

Complexity. A 90 m² simple gable roofs in 4–5 days. The same square metres on a Victorian villa with 3 chimneys, 2 dormers, lead valleys and parapet stones takes 9–12 days for the same crew. Add 12% (moderate) or 28% (complex) to labour.

Wind zone fixing. BS 5534 zone 4 (coastal Cornwall, Devon, the Outer Hebrides, Northern Ireland, the West Coast of Scotland) requires every tile mechanically fixed with a clip and nail. Inland zone 1 typically needs perimeter and ridge fixing only. Zone-4 fixing adds about £8–£12/m² in nails, clips and labour over zone-1 minimum.

Building regulations. Replacing more than 25% of the roof covering on a heated dwelling triggers Approved Document L1B 2024 — U-value 0.16 W/m²K. Most older homes need 100 mm PIR over the rafters or 150 mm PIR between, costing £35–£55/m² extra. Not in the calculator total — check with your building control officer.

Tile vs slate vs zinc — which to actually pick

Concrete interlocking tile — the default for 60% of UK 2026 re-roofs. Pick concrete interlocking for 1960s–1990s estate homes, where the original was the same and you’re matching adjoining properties.

Concrete or clay plain tile — for inter-war and Victorian properties where interlocking would look wrong. Clay handmade plains are the high-end choice for Cotswold, Sussex, and Kent vernacular.

Natural slate — for Welsh, Cumbrian, Scottish and many Victorian terraces where the original was slate. Welsh slate (Penrhyn, Ffestiniog) lasts 125 years; Spanish slate (CUPA, Burlington) lasts 80–100 years at 30–40% lower cost.

Standing-seam zinc — for contemporary and modern infill new-build. Zinc has the lowest carbon footprint of any major roofing metal and develops a self-healing patina. Lasts 80+ years.

Bitumen shingle — only for outbuildings, garages, garden offices, and Class Q agricultural conversions. Most local plans don’t permit bitumen on the principal elevation of a domestic dwelling.

Common gotchas that blow the budget

Sarking and timber repair. Stripping the roof exposes rafter ends, wall plate, and (in Scotland) sarking boards. Plan £25–£75/linear metre for rafter end repairs; £25–£45/m² if sarking boards need replacing wholesale.

Velux replacement. A 30-year-old skylight is at end of life when its host roof is. Velux GGL or GPL replacements run £600–£1,200 per fixture installed, more for centre-pivot to top-hung conversions.

Chimney repointing and flashings. Old lead apron and step flashings should be replaced at every re-roof. Repointing the chimney from a scaffold platform during the re-roof costs £350–£900 per stack — much cheaper than scaffolding the chimney separately later.

Gutter and fascia. UPVC fascia, soffit and gutter typically goes hand-in-hand with a re-roof: £18–£35 per linear metre installed, all the way around the eaves. Cast aluminium runs £35–£65/lm.

Permission. Listed buildings (Grade I, II* and II), conservation areas, and properties subject to an Article 4 Direction often require like-for-like material — natural slate or clay plain tile, not concrete. Local Authority planning fees run £206 for a domestic application in 2026.

Sources: 2026 NFRC member benchmark pricing; BS 5534:2014+A2:2018 Code of Practice for slating and tiling; Approved Document L1B 2024 amendments; BBA Agrément certificates for IKO, Marley, Redland, SIG, CUPA Pizarras; Checkatrade Q1 2026 regional roofing data; MyBuilder Q1 2026 trade pricing benchmarks; Welsh Slate trade list 2026; Work at Height Regulations 2005 (SI 2005/735); UK Met Office BS 5534 wind-zone map.

Frequently asked questions

How much does a new roof cost in the UK in 2026?
A typical UK semi-detached roof of 90 m² costs £6,500 to £10,500 in concrete interlocking tiles, £8,500 to £14,000 in clay plain tiles, £14,000 to £24,000 in natural Welsh slate, £11,000 to £18,000 in standing-seam zinc or aluminium, and £4,500 to £7,500 in modern bitumen shingles where permitted. Source: 2026 NFRC member pricing data, Checkatrade and MyBuilder regional averages Q1 2026.
Are these prices VAT-inclusive?
The calculator quotes labour and materials at trade rates excluding VAT. For a domestic re-roof on an existing dwelling, most jobs qualify for the standard 20% VAT rate; energy-efficiency-linked work (adding insulation under a re-roof) can drop to 5% under the reduced rate. Listed buildings (Grade I and II*) may also qualify for VAT relief on certain alterations. Apply VAT on top of the calculator total.
Does this account for working at height regulations?
Yes — the labour figures assume scaffolding hire on properties over 4 metres to eaves, in line with the Work at Height Regulations 2005. Two-storey terraced and semi-detached homes typically need 4–8 weeks of scaffold at £35–£55/m² of building elevation, which the calculator includes within the labour line. Single-storey extensions and bungalows can sometimes be done from a tower scaffold and run 12–18% cheaper on labour.
Why is natural slate so much more expensive than concrete tile?
Welsh, Spanish, or Scottish natural slate sits at £85–£140 per m² installed in 2026; concrete interlocking tiles run £55–£95 per m². The slate itself is hand-quarried, hand-trimmed and hand-laid with copper or stainless nails over breather membrane, while concrete tiles are mass-produced and clip-fixed. But slate lasts 75–125 years versus 50–60 for concrete tile — the cost-per-year tile in the calculator usually shows them within 10% of each other over their lifetimes.
What's covered under BS 5534?
BS 5534:2014+A2:2018 is the Code of Practice for slating and tiling for pitched roofs and vertical cladding. It covers wind-load fixing schedules (every tile mechanically fixed in Zone 4 wind areas, every other in Zone 1–3), batten gauge calculations, eaves and ridge details, and dry-fix systems versus traditional sand-and-cement bedding. Any reputable UK roofer should be quoting to BS 5534 and using BBA-certified components.
What about Approved Document L building regulations?
Approved Document L1B (2024 amendments effective 2025) requires a U-value of 0.16 W/m²K for replacement roof coverings to a heated dwelling where more than 25% of the surface is being replaced. This usually means upgrading rafter-level insulation (PIR boards over or between rafters) at £35–£55 per m². The calculator does not include insulation upgrades — add this if your re-roof triggers the consequential improvements clause.
Should I get an NFRC contractor?
The National Federation of Roofing Contractors operates a Vetted Contractors scheme that requires demonstrated competence, insurance verification, financial stability and reference checks every three years. NFRC contractors typically quote 5–10% above the cheapest non-vetted quote you'll find on Checkatrade, but that premium buys you a binding insurance-backed guarantee, an installer who knows BS 5534 fixing schedules from memory, and recourse via the NFRC complaints process if something goes wrong. Worth it on any job over £8,000.
What is not in the calculator total?
The calculator excludes structural timber repairs (typical £25–£75 per linear metre of rafter), full reboarding ($25–$45/m² for OSB sarking on Scottish stone-built homes), gutter and fascia replacement (£18–£35 per linear metre installed), Velux skylight replacement (£600–£1,200 per fixture), chimney repointing and flashing (£350–£900 per stack), and any insulation upgrade required by Approved Document L. Plan a 10–12% contingency on top of the calculator total.

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