Planning a bathroom renovation in London? As a general budgeting guide, allow around £7,000–£12,000 for a straightforward refurbishment, £12,000–£20,000 for a mid-range renovation and £20,000–£40,000 or more for a bespoke, high-end bathroom.
The final price depends on much more than the size of the room. The layout, existing plumbing, quality of materials, amount of preparation and access to the property all influence the work involved.
At Smart Maintenance+, we have completed bathroom projects across London and Surrey, from practical refurbishments for rental properties to individually designed luxury bathrooms. Below, we explain where the money goes, what a quotation should include and how to make the most of your budget.
Bathroom Renovation Costs in London: 2026 Price Guide
| Renovation type | Estimated cost | Typical scope |
|---|---|---|
| Straightforward bathroom refurbishment | £7,000–£12,000 | New fittings and finishes, generally keeping the existing layout |
| Mid-range bathroom renovation | £12,000–£20,000 | Full refurbishment with upgraded fittings, tiling and possible service alterations |
| Luxury or bespoke bathroom | £20,000–£40,000+ | Premium materials, specialist installation, custom features and more complex work |
These are indicative planning ranges used by Smart Maintenance+, not fixed quotations or independently calculated London-wide averages. Actual costs depend on the specification and property conditions. Check whether prices include VAT, sanitaryware, tiles and any specialist services when comparing quotations.
A carefully planned refurbishment can cost less if the existing layout and services remain in place. Conversely, a relatively small bathroom can be expensive when it requires substantial plumbing changes, structural preparation or specialist finishes.
What Is Included in a Full Bathroom Renovation?
A complete bathroom renovation involves several trades, often working in sequence. Understanding what each stage includes makes it easier to compare quotations and identify missing costs.
| Stage | What the work may include |
|---|---|
| Preparation and strip-out | Protecting the property, removing old fittings, tiles and finishes, and disposing of waste |
| Plumbing and drainage | Water supply alterations, waste connections, pipework and installation preparation |
| Electrical work | Lighting, extractor fans, mirrors, heating controls and any required electrical upgrades |
| Walls and floors | Repairing damaged surfaces, levelling, plastering and substrate preparation |
| Waterproofing | Waterproofing systems for showers, wet areas and other areas requiring protection |
| Tiling and finishes | Wall and floor tiles, panels, stonework, grouting and sealant |
| Sanitaryware installation | Toilets, baths, showers, basins, taps, vanity units and accessories |
| Final works | Painting, testing, finishing details, snagging and cleaning |
Not every project needs every stage. However, an apparently inexpensive quotation may exclude work that becomes essential once the existing bathroom is removed.
Before accepting a quote, ask for a written specification that identifies what is included, excluded or subject to an allowance.
What Affects the Cost of a Bathroom Renovation in London?
1. Bathroom size and layout
Larger bathrooms generally require more flooring, tiling and materials, but size alone is not a reliable predictor of cost.
A compact bathroom with a walk-in shower, concealed fittings and bespoke storage may be more expensive to renovate than a larger bathroom with a straightforward layout.
Keeping the toilet, basin, bath and shower in their existing positions can reduce plumbing alterations. Moving a toilet or creating a level-access shower may involve additional drainage work, changes to floor construction and careful waterproofing.
2. Quality of materials and sanitaryware
The difference between standard and premium bathroom fittings can be substantial.
Porcelain tiles, natural stone, wall-hung toilets, concealed shower controls, freestanding baths and bespoke vanity units all affect the budget. The installation method matters as much as the purchase price.
For example, large-format tiles can create an elegant, seamless appearance, but they often require particularly flat surfaces and specialist handling.
3. Plumbing, electrics and ventilation
An attractive bathroom still needs dependable water supply, drainage, electrical installations and ventilation.
Before specifying a powerful shower, additional outlets or specialist fittings, it is important to establish whether the existing services can support them.
Electrical alterations, extractor upgrades, underfloor heating and changes to pipework should be considered before tiling and waterproofing begin.
4. Hidden damage and preparation work
Some of the most important work is invisible in the finished bathroom.
When existing tiles and fittings are removed, contractors may discover damaged flooring, previous leaks, poor waterproofing, deteriorated pipework or uneven walls.
A thorough survey can identify many potential issues, but it cannot reveal everything concealed behind existing finishes. Your contractor should explain how unforeseen work would be priced and approved.
5. Access and building restrictions
Bathroom refurbishment costs can also be influenced by how easily materials and waste can be moved to and from the property.
In some London flats, parking restrictions, lift bookings, limited working hours and protection of communal areas introduce additional labour and coordination.
For a more detailed explanation, read our guide to why bathroom renovations in London flats can cost more.
Real Bathroom Renovation Costs: Smart Maintenance+ Projects
Actual projects are more useful than generic price estimates because they demonstrate how design decisions, finishes and working conditions affect the final budget.
£5,500: Practical Bathroom Refurbishment in Surrey
One of our projects involved a bathroom of approximately 6 m² in a Surrey rental property. The owner wanted an attractive, durable result without unnecessary expenditure.
We retained the main sanitaryware positions, avoided extensive plumbing alterations and used full-height bathroom wall panels instead of more expensive shower-area tiling.
The refurbishment also included new sanitaryware, vinyl flooring and redecoration.
- Materials: approximately £2,500
- Labour: approximately £3,000
- Total: approximately £5,500 before VAT
This was a deliberately limited refurbishment rather than a comprehensive redesign. The savings came from controlling the scope and selecting practical finishes.
£10,000: Complete Bathroom Refurbishment in Battersea
At York Mansions in Battersea, Smart Maintenance+ completed a bathroom renovation involving full strip-out, repairs to the walls and floor, plumbing and electrical improvements, waterproofing and new tiling.
We installed modern sanitaryware, a shower enclosure, upgraded ventilation and lighting, followed by final decoration.
The project had a published budget of £10,000, demonstrating what can be achieved with a well-defined scope.
View our York Mansions bathroom refurbishment.
£25,000: Luxury Bathroom Renovation in Hammersmith
This bathroom refurbishment in Hammersmith was designed around a more premium specification.
The project included a spacious walk-in shower, frameless glass screens, concealed shower controls, marble-effect porcelain tiles, a wall-hung WC, a floating vanity and brushed brass fittings.
The published project budget was £25,000.
See the completed luxury bathroom in Hammersmith.
£45,000: Bespoke Bathroom in a Top-Floor Flat
Another Smart Maintenance+ project involved a much larger bathroom of approximately 20 m², finished with a Jacuzzi, natural stone, mosaics, large-format tiles and bespoke details.
The renovation also required electrical upgrades, specialist tiling and carefully coordinated access to an upper-floor property.
The project cost approximately £45,000 and took around six weeks to complete. Materials accounted for approximately £12,000–£15,000 and labour for around £20,000; the total included further project costs. Certain professional design and measurement services were arranged and paid for separately by the client.
The project illustrates why an ambitious specification, extensive preparation and difficult access can result in a substantially higher budget.
These projects differ in location, scope and specification. The figures are individual project examples rather than directly comparable like-for-like quotations.
How Long Does a Bathroom Renovation Take in London?
A straightforward bathroom renovation may take around one to three weeks, depending on the work involved. More complex projects can take considerably longer.
A typical renovation follows this sequence:
- Site preparation and removal of existing fittings.
- Plumbing, electrical work and repairs to walls and floors.
- Waterproofing and surface preparation.
- Tiling, flooring and installation of sanitaryware.
- Decoration, testing and final finishing.
The schedule can be extended by hidden damage, changes to the design, specialist materials or restrictions imposed by the building.
For example, our bespoke top-floor bathroom project took approximately six weeks because of its scale, specification and logistical requirements.
A reliable contractor should provide a realistic programme based on the actual property rather than promise the same completion time for every bathroom.
How to Reduce Bathroom Renovation Costs Without Compromising Quality
The most effective savings usually come from making good decisions before construction starts.
Keep the existing layout where practical. Avoiding unnecessary changes to the toilet, basin and shower positions can reduce plumbing and preparation work.
Choose materials based on durability as well as appearance. Good-quality porcelain tiles, standard-sized sanitaryware and carefully selected fittings can provide an excellent result without requiring premium products throughout.
Simplify bespoke details. Recessed niches, complex tile patterns and custom joinery may be worthwhile, but each should justify its additional cost.
Make decisions before work begins. Late changes to tiles, shower systems or fittings can lead to rework and delays.
Do not compromise on waterproofing and preparation. Saving money on concealed technical work may create much more expensive problems later.
Frequently Asked Questions About Bathroom Renovation Costs
How much does a small bathroom renovation cost in London?
A relatively straightforward small bathroom refurbishment may fall within the £7,000–£12,000 planning range, although limited refreshes can cost less. Extensive plumbing changes, premium fittings or restricted access can increase the cost even when the room is small.
Can I renovate a bathroom in London for less than £7,000?
Yes, depending on the scope. Our approximately £5,500 Surrey project demonstrates how retaining the existing layout and selecting practical finishes can reduce costs. However, this was a limited refurbishment, not a typical full London bathroom renovation.
Does a bathroom renovation quote include VAT?
Not necessarily. Contractors may present estimates including or excluding VAT. Always request a written quotation showing the applicable VAT treatment, product allowances and the full amount payable.
Is it cheaper to keep the existing bathroom layout?
Generally, yes. Retaining the main plumbing and drainage positions can reduce labour and alterations to floors and walls. However, the condition of the existing services still needs to be assessed.
Do I need Building Regulations approval to renovate a bathroom?
Certain bathroom works may be subject to Building Regulations, particularly changes involving plumbing installations, electrics near baths or showers, and other controlled work. Simple like-for-like replacements may not require an application. The requirements depend on the proposed work.
You can check the official GOV.UK guidance on Building Regulations approval.
How can I get an accurate bathroom renovation quote?
Arrange a site survey and provide as much detail as possible about your preferred layout, fixtures, materials and budget. A detailed assessment allows the contractor to evaluate existing services, site access and the full scope before preparing a written quotation.
Get a Bathroom Renovation Quote in London
Planning to renovate your bathroom in London or Surrey?
Smart Maintenance+ manages bathroom refurbishments from initial planning through to final installation, coordinating plumbing, electrical work, waterproofing, tiling and finishing.
Whether you want a practical bathroom upgrade or a bespoke luxury space, we can help you define the scope and prepare a clear, fixed-price quotation after a site survey.
Learn more about our bathroom design and installation services in London and Surrey.