Takes less than 3 minutes

BATHROOM RENOVATION
COST CALCULATOR

Answer a few quick questions and get an instant personalised estimate no sales calls, no obligation.

Covering London, Kent & Essex Free, no-obligation quote 18 Months Workmanship Warranty
Step 1 of 9 Bathroom Size 11%
Your Live Estimate
Updates as you answer
£3,500 – £5,500
Typical range for your selections

What size is your bathroom?

Approximate floor area don't worry, it doesn't need to be exact.

Small
Up to 4 m² typical en-suite or compact WC
From £3,500
Medium
4–8 m² standard family bathroom
From £5,500
Large
8–12 m² spacious main bathroom
From £8,000
Extra Large
12 m²+ luxury or master suite
From £12,000

What type of bathroom is it?

This helps us understand the layout and usage requirements.

En-Suite
Attached to a bedroom
Family Bathroom
Shared household bathroom
Master Bathroom
Primary, often larger bathroom
Wet Room
Open-plan shower area
Cloakroom / WC
Toilet & basin only
New Build
Starting from scratch

What's the current condition?

How much work needs to be done before fitting can begin?

Cosmetic Refresh
New tiles, paint, fixtures only structure stays
Least disruption
Partial Renovation
Some plumbing & electrics may need updating
Mid-range
Full Strip-Out
Complete removal walls back to stud or block
More complex
Structural Changes
Moving walls, pipework or layout changes needed
Most comprehensive

Which fixtures are included?

Select everything you'd like us to supply and fit.

What quality level of fixtures?

This covers the grade of sanitaryware, taps, and fittings.

Standard
Good quality, widely available brands functional and reliable
e.g. Wickes, Duravit entry
Mid-Range
Better finish, longer guarantees, modern aesthetics
e.g. Roca, Ideal Standard
Premium
Designer brands, high-end finishes, statement pieces
e.g. Duravit, Crosswater
Luxury
Bespoke / architect-specified no compromise on quality
e.g. Villeroy & Boch, Fired Earth

Wall & floor finishes

What's your preference for tiling and floor surfaces?

Ceramic Tiles
Classic, durable, affordable
Porcelain
Low maintenance, sleek finish
Wet Wall Panels
Grout-free, quick to install
Natural Stone
Marble, travertine, limestone
Painted Plaster
Moisture-resistant paint
Microcement
Seamless, industrial finish
Ceramic / Porcelain
Hard-wearing, moisture-proof
Luxury Vinyl
Warm underfoot, waterproof
Natural Stone
Premium look, requires sealing

Any additional features?

Select any extras you'd like included in your renovation.

Timeline & location

A couple of final details to help us plan your project.

Please enter your name to continue.
ASAP
Within the next few weeks
1–3 Months
Planning ahead
3–6 Months
Still early stages
Just Exploring
No fixed timeline yet

Your personalised estimate is ready

Enter your details below and we'll send a full itemised quote straight to your inbox usually within 2 hours.

Your Project Summary
Estimated Range
Based on your selections
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Quote Request Sent!

Thank you a member of the Buildaway team will review your selections and send a detailed, itemised quote to your inbox within 2 hours.

✓ Quote sent to your email ✓ No obligation ✓ Response within 2 hours

What Is the Buildaway Bathroom Cost Calculator?

The Buildaway Bathroom Renovation Cost Calculator is a free, instant online tool that gives homeowners in London, Kent and Essex a realistic price estimate for their bathroom project without the need to book a site visit first. In under three minutes, you can answer a short series of questions about your bathroom size, type, condition and finish quality, and receive a live estimate that updates as you go.

Unlike generic online cost guides that offer wide, vague national averages, this calculator is built on real project data from bathrooms we've completed across South East England. The pricing logic accounts for local labour rates, material costs and trade mark-ups relevant to the London and Home Counties market in 2025 so the number you see reflects what a project like yours would actually cost with a reputable contractor.

The estimate is a starting point, not a binding quote. Every bathroom is different, and final costs depend on factors only visible during a site survey such as the condition of existing plumbing, the age of the property, and access to stop valves or soil stacks. Once you submit your details, a member of the Buildaway team will review your selections and follow up with a more detailed, personalised quotation.

How Does the Calculator Work?

The tool walks you through nine straightforward steps, each designed to capture a key cost variable. Your live estimate adjusts in real time as you answer.

1
Answer 9 Quick Questions
Tell us about your bathroom size, type, current condition, fixtures, finishes and preferred timeline.
2
Get an Instant Estimate
Your cost range updates live with every selection, based on real project pricing from London and the South East.
3
Receive a Tailored Quote
Submit your contact details and a Buildaway specialist will follow up with a detailed, no-obligation quotation.

The calculator covers all common bathroom types including en-suites, family bathrooms, master bathrooms, wet rooms, cloakrooms and new-build fit-outs and accounts for fixture quality from standard to luxury specification.

Bathroom Renovation Cost Guide London 2025

The table below shows typical cost ranges for bathroom renovations in London and the surrounding areas, based on Buildaway project data and current trade pricing. All figures include labour, materials, waste disposal and VAT unless stated otherwise.

Bathroom Type Scope Typical Cost Range
Cloakroom / WC Full refurbishment £2,500 – £4,500
En-Suite (small) Full strip-out & refit £4,000 – £7,000
Family Bathroom Full renovation, mid-range finish £6,000 – £11,000
Master Bathroom Full renovation, premium finish £9,000 – £18,000
Wet Room Full tanking & fit-out £8,000 – £16,000
Luxury Bathroom Bespoke, high-specification £18,000 – £40,000+
Disclaimer: Prices are estimates based on typical projects completed in London and the South East between 2023–2025. Individual costs vary depending on property condition, access, structural works, material choices and the specific trade contractors required. Use these figures as a guide and request a free, detailed quote for an accurate price for your bathroom.

What Affects the Cost of a Bathroom Renovation in London?

Bathroom renovation costs vary significantly depending on a combination of property-specific, design and logistical factors. Understanding these variables helps you plan realistically and avoid hidden surprises once work begins.

Bathroom Size & Layout
Larger bathrooms require more materials tiles, screed, waterproofing membrane and longer installation time. Moving plumbing or changing the layout adds significant cost.
Fixture Quality & Brand
Entry-level suites start around £400; premium and designer ranges can exceed £5,000. Thermostatic showers, freestanding baths and bespoke vanity units command a premium.
Existing Condition
Properties with outdated lead or copper pipework, damaged joists, asbestos or poor waterproofing require remedial work before any new installation can begin.
Wall & Floor Finishes
Large-format porcelain tiles, natural stone and herringbone mosaic installations take longer to lay and involve higher material costs than standard ceramic tiles.
Location Within London
Labour rates in Central and Inner London are typically 15–25% higher than in Outer London, Kent and Essex due to higher contractor overheads and parking/access costs.
Electrical & Heating Work
Adding underfloor heating, relocating a fuse spur, or installing an extractor fan all require Part P-certified electricians and add to the overall project cost.
Project Timeline
Urgent or fast-tracked timelines may carry a premium. Flexible scheduling typically allows us to allocate the most cost-effective trade teams to your project.
Accessibility Features
Wet room conversions, grab rails, raised toilet pans and walk-in showers for mobility requirements involve additional waterproofing and structural considerations.

Why Get Your Estimate From Buildaway?

Buildaway is a full-service construction and renovation company based in Chislehurst, Bromley, serving London and the surrounding areas. Our team of directly employed tradespeople and specialist subcontractors delivers high-quality bathroom and wet room projects across South East London, Kent and Essex.

Every estimate from this calculator is backed by real project data not guesswork or inflated national averages. We are fully insured, and all electrical and gas works are carried out by qualified, registered engineers. Our workmanship warranty means that if anything goes wrong as a result of our installation, we come back and fix it at no additional charge.

We cover all postcodes across London, Kent and Essex including Bromley, Greenwich, Lewisham, Southwark, Croydon, Dartford, Sevenoaks, Maidstone, Brentwood and Chelmsford. If you're unsure whether we work in your area, get in touch and we'll confirm coverage for your postcode.

Frequently Asked Questions About Bathroom Renovation Costs

How accurate is the bathroom cost calculator?
The calculator provides an indicative price range based on real project data from bathrooms completed in London and the South East. It is accurate enough to help you budget and shortlist contractors, but it is not a final quote. Factors such as structural issues, condition of existing plumbing, and specific material choices can only be properly assessed during a site survey. Once you submit your details, a Buildaway specialist will follow up with a more detailed and tailored quotation.
How long does a bathroom renovation take?
A standard family bathroom renovation typically takes 7–14 working days from strip-out to final clean. Small en-suites or cloakrooms can be completed in 4–6 days. Larger master bathrooms, wet rooms or bathrooms requiring structural changes may take 3–4 weeks. The timeline depends on the scope of work, material lead times and trade availability. Your Buildaway project manager will provide a detailed programme before work begins.
Does the estimate include VAT?
Yes. The cost ranges shown by the calculator and in the guide above are inclusive of 20% VAT. Buildaway is fully VAT registered. Your formal quotation will show a clear breakdown of labour, materials and VAT so there are no surprises at invoice stage.
Do I need to supply the fixtures and tiles, or does Buildaway do this?
We offer flexible arrangements. Many clients prefer to supply their own sanitary ware and tiles particularly when they have already visited a showroom or found specific products online. In these cases, we provide a labour-only or partial-supply quote. Alternatively, we can source and supply all fixtures, fittings and materials on your behalf through our trade accounts, which often results in cost savings compared to retail prices. Either approach is accommodated.
What areas do you cover for bathroom renovations?
Buildaway covers all areas across London, Kent and Essex. Key locations include Bromley, Chislehurst, Greenwich, Lewisham, Southwark, Croydon, Bexley, Dartford, Sevenoaks, Tonbridge, Maidstone, Brentwood, Chelmsford and Basildon. If your postcode is not listed, please contact us directly we regularly take on projects across a wider area depending on availability and project size.
Is the quote genuinely free and no obligation?
Yes, completely. Using this calculator and requesting a follow-up quotation costs nothing and places no obligation on you to proceed. We believe in transparent, pressure-free pricing. If you choose not to go ahead after receiving your detailed quote, that is absolutely fine we never use high-pressure sales tactics.