United Kingdom calculator
Bathroom Renovation Cost Calculator
Estimate the cost to renovate your bathroom. Adjust floor area, scope, finish level, and tub-to-shower conversion to see an itemised ex-VAT range before the UK VAT total.
How this calculator is built
Unit costs with sources
This model cites 3 sources for its line-item cost and regional labour inputs.
Regional labour adjustment
The region table applies local labour indexes only to labour-heavy line items.
Published methodology
The methodology page lists the formula, size drivers, labour model, and source links.
How this estimate is calculated
The model prices 9 project line items from published cost inputs. Quantities are driven by your bathroom floor area in m2, scope of work, finish level, and whether a tub is converted to a walk-in shower. The selected scope and finish adjust those inputs, then the regional index changes only each line's labour share; material prices remain national.
The itemised midpoint is shown as a ±25% planning range. It is not a contractor quote: access, design choices, permits, availability, and site conditions can move the final price.
VAT
The calculator applies the configured standard UK VAT rate of 20% to its renovation estimate and shows the VAT-inclusive total. Some projects or properties can qualify for different treatment, so confirm the rate and any exemptions on each contractor quote.
How firm these costs are
The national renovation model is assembled from the public cost guides cited for its individual inputs, then calibrated against a cited market range. Individual line prices are planning allocations rather than live quotes; compare the result with itemised quotes from qualified contractors before budgeting.
Estimate your project
Change the default inputs to match your scope. The breakdown updates by line item.
Bathroom Renovation Cost by region: typical ranges
Each range applies that region's labour index to the labour-share line items of the default project; materials stay at national prices. Select a region for its full local breakdown and calculator.
| Region | Typical range | Labour index | Permit |
|---|---|---|---|
| East Midlands | £4,867–£8,111 | 95% | Likely |
| East of England | £4,867–£8,111 | 95% | Likely |
| London | £5,303–£8,838 | 112% | Likely |
| North East | £4,867–£8,111 | 95% | Likely |
| North West | £4,892–£8,154 | 96% | Likely |
| Scotland | £4,995–£8,325 | 100% | Likely |
| South East | £5,098–£8,496 | 104% | Likely |
| South West | £5,277–£8,795 | 111% | Likely |
| Wales | £4,944–£8,240 | 98% | Likely |
| West Midlands | £4,867–£8,111 | 95% | Likely |
| Yorkshire and the Humber | £4,841–£8,069 | 94% | Likely |
Common questions
How much does a new bathroom cost in the UK?
Checkatrade's 2026 guide puts the average new bathroom at about £7,000 including VAT. The calculator models the ex-VAT subtotal first, then the GB market adds VAT to the displayed total.
What drives bathroom renovation cost?
The largest variables are scope, plumbing changes, shower specification, tile area, and whether electrical work must be notified under building regulations.
Are the area costs per square metre?
Yes. GB bathroom area inputs are in m2, and the demolition and tile/flooring lines are priced per m2.