Roof Replacement Cost Calculator UK

By CalculatorBolt Team | Published: Jan 15, 2025 | Updated: Jan 15, 2025 | Reviewed by: Cost Estimator & Construction Editor

Estimate roof replacement cost in the UK. Enter roof area, type, stories, and optional services. Get a price range in GBP and budget estimate. Informational only—get quotes from professionals.

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Estimate Roof Replacement Cost

Total roof area to be replaced
Material and construction type
Building height affects scaffolding and access
Regional labor and material rates vary

Used when "Custom" regional is selected

How it Works

We use a base cost per m² matrix by roof type and number of stories. Adjusted Base Cost = Area × Rate × Regional Multiplier. Optional services (scaffolding, waste removal, etc.) are added. The result is a cost range in GBP.

Inputs Explained

  • Roof Area: Total roof area in square meters (m²).
  • Roof Type: Pitched (tiles, slate, metal) or Flat (felt, EPDM, GRP, liquid applied).
  • Number of Stories: Building height affects scaffolding complexity and access costs.
  • Optional Services: Scaffolding (£500–£1,500), Waste Removal (£200–£500), Underlay (£5–£10/m²), Fascias & Guttering (£30–£60/m²).
  • Regional Adjustment: England, Scotland, Wales, Northern Ireland. London and Scotland may be 10–20% higher.

Example

Given:

  • Roof Area: 80 m²
  • Roof Type: Pitched Tiles
  • Stories: Two Storey
  • Region: England
  • Optional: Scaffolding

Calculation:

Base Rate: £100–£150/m² (Pitched Tiles, Two Storey)

Base Cost = 80 m² × £100 = £8,000 to 80 × £150 = £12,000

Adjusted = £8,000 × 1.0 = £8,000 to £12,000 × 1.0 = £12,000

Add Scaffolding: +£1,000 (average)

Result: £9,000–£13,000

Tips & Notes

  • Multi-storey roofs cost more due to scaffolding complexity and access requirements.
  • Regional variations exist. Scotland and London may be 10–20% higher than the national average.
  • Always get multiple quotes from certified roofing contractors. Check their qualifications and insurance.
  • Material quality varies. Premium materials (natural slate) cost more but last longer.
  • Scaffolding is essential for safety on multi-storey buildings. Budget £500–£1,500.
  • Flat roofs are cheaper than pitched roofs but may need replacement more frequently.

FAQs

Pitched tiles: £80–£150/m². Flat roofs: £50–£150/m². Rates vary by material and region. Slate and premium materials cost more.

Yes. Scaffolding can add £500–£1,500 depending on building height and access. Include it in optional services for two-storey and above.

It provides an estimate based on typical UK rates. Actual costs depend on contractor, material quality, and market conditions. Always get multiple quotes from certified professionals.

Flat roofs typically cost £50–£150/m² depending on material: Felt (£50–£80), EPDM rubber (£70–£110), GRP fiberglass (£80–£120), or liquid applied (£60–£100).

Pitched roofs (tiles/slate) last 40–100 years. Flat roofs last 10–30 years depending on material. EPDM and GRP last longer than felt.

Usually not for like-for-like replacement. However, listed buildings, conservation areas, or changing roof type may require planning permission. Check with your local council.

Typical timescale: Single storey (3–5 days), Two storey (5–10 days), Three storey (10–14 days). Weather and complexity can extend timelines.

No. All calculations run in your browser. Use Export or Share Link to save your configuration.

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