Bathroom renovations are among the most demanding and financially significant projects in UK-style flat blocks. In 2026, a complete bathroom renovation in a 1-bedroom flat costs on average €9,000 to €14,000, in a 2-bedroom flat €12,000 to €18,000, and in a 3-bedroom flat €15,000 to €22,000, including materials. This overview provides real-world pricing for each stage, the step-by-step process from demolition to completion, model budgets for various flat sizes, and practical tips to avoid the most common pitfalls.
Key Facts About Bathroom Renovations in 2026
Before hiring a contractor, review the essential data:
- 1-bedroom flat bathroom renovation: €9,000 – €14,000
- 2-bedroom flat bathroom renovation: €12,000 – €18,000
- 3-bedroom flat bathroom renovation: €15,000 – €22,000
- Price per m² of floor area: €200 – €350/m²
- Duration of complete renovation: 4 – 8 weeks
- Contingency fund: 20 – 25% above the quote
- Workmanship guarantee: Minimum 24 months
For VAT-registered firms, VAT at 23% must be added to these prices. For older properties built before 1995, expect a higher contingency — damp, compromised pipework, or asbestos insulation often only appear after strip-out, increasing the budget by 15% to 25%.
What Does a Flat Block Bathroom Renovation Include?
In a standard flat block, a "bathroom renovation" means a complete replacement of all services and finishes in the wet areas — bathroom, WC, kitchen services, and main stacks. In some cases, it involves structural reconfiguration, moving partitions, or creating an open-plan ensuite.
A full renovation involves seven main stages: strip-out of the old bathroom and WC, replacement of water and waste pipework, electrical rewiring, plasterboard partitions or new masonry, tiling, sanitaryware installation, and snagging/finishing works like painting and lighting. In older blocks, it often includes replacing aged soil stacks and water risers that have exceeded their service life.
For larger renovations, ancillary works are added — door replacements, new flooring throughout the flat, knocking through kitchen partitions to create open-plan living, or relocating services for a kitchen island.
What Makes Up the Cost of a Renovation?
The final price depends on six main components, which vary significantly based on the scope, age of the block, and the quality of finishes specified.
Demolition and strip-out costs for a standard bathroom in a 1-bed flat range from €800 to €1,400 including waste disposal. This involves hacking off old tiles, removing original sanitaryware, and in older blocks, removing legacy partition boards. See more details in the demolition works section.
New plumbing and drainage costs €1,800 to €3,500 for a 1-bed flat, and €2,500 to €4,500 for a 2-bed flat. This includes coordinating stack replacements with the building management. Current standards involve PEX or multi-layer composite pipes with press-fit connections. Detailed pricing is in the plumbing works section.
New electrical installations are almost always necessary — older blocks often have original aluminium wiring that lacks the capacity for modern appliances. A full rewire for a 1-bed flat costs €1,100 to €1,700, and €1,400 to €2,200 for a 2-bed. More info under electrical works. We discuss the full process in our article on flat rewiring costs.
Plasterboarding and studwork, which replaces old partitions, costs €1,200 to €2,500 depending on complexity. See drylining costs for details.
Tiling and grouting are major aesthetic and financial factors — €2,000 to €4,500 depending on bathroom size and tile quality. This covers hacking off old tiles, fixing new tiles, and final grouting.
Sanitaryware and fit-out (bath or shower, WC, basin, taps, lights, painting) add another €1,500 to €3,500.
Real-Life Costs by Flat Size
Renovation costs naturally scale with flat size — larger flats mean longer service runs, more sanitaryware, more tiling, and higher coordination costs. Here are real budgets for three common flat types.
Bathroom Renovation in a 1-Bedroom Flat
In a standard 1-bed flat (approx. 55 to 60 m²), the renovation usually covers a compact bathroom (3 to 4 m²) and separate WC. The total ranges between €9,000 and €14,000 including materials, labour, and mid-range sanitaryware. High-end tiles and designer brands (Geberit, Grohe, Hansgrohe) can push this to €16,000. Project duration: 4 to 6 weeks.
Bathroom Renovation in a 2-Bedroom Flat
In a 2-bed flat (approx. 65 to 80 m²), the bathroom is usually larger (5 to 7 m²). Renovation costs €12,000 to €18,000. With structural changes (knocking through to the WC, walk-in shower with concealed valves), it can reach €20,000. Duration: 5 to 7 weeks.
Bathroom Renovation in a 3-Bedroom Flat
In 3-bed flats (75 to 95 m²), there is often a family bathroom with both bath and shower plus a separate cloakroom. A full renovation costs €15,000 to €22,000, or €25,000 for premium finishes. Duration: 6 to 8 weeks.
In the context of the overall 2026 construction price list, the bathroom is usually the most expensive single item in a flat refurbishment, accounting for 50-70% of the total budget.
Optimised Step-by-Step Renovation Sequence
A professional renovation follows a strict order of works due to technical dependencies. Skipping or reordering steps leads to remedial work that is far more expensive than the original build.
Step one is the strip-out — removing the old bathroom, disconnecting sanitaryware, and disposing of waste. In blocks built before 1995, asbestos testing is vital — professional surveys cost €80 to €150, and positive findings require specialist remediation.
Step two is first-fix services — new water, waste, and electrical runs chased into walls. This fixes the final layout of sanitaryware and sockets; a detailed plan is essential before starting. Changes after chasing are costly and time-consuming.
Step three is first-fix building — closing up chases, installing new stud partitions, and leveling substrates for tiling. A technical drying period of 3 to 5 days for cementitious repairs is mandatory.
Step four is tanking and tiling — starting with waterproofing membranes in wet areas, followed by tile setting. Quality execution requires at least 24 hours for waterproofing to cure before tiling begins.
Step five is second-fix plumbing and electrics — installing the bath/shower tray, WC, basin, and taps. Step six covers the final finishes: decorating, mounting mirrors, accessories, and a final sparkle clean.
Common Mistakes to Avoid
Even in 2026, typical errors occur that only manifest after completion, causing significant financial and logistical headaches.
The most common error is inadequate tanking (waterproofing) in the shower area. After a few months, moisture builds behind the tiles leading to mould growth and, eventually, leaks to the flat below. Professional tanking involves a two-coat liquid membrane and corner reinforcement tapes.
The second major error is underestimating the electrics — original aluminium wiring in old blocks must be replaced. During a renovation, all circuits must be upgraded to copper and the consumer unit sized for modern loads (washing machines, dryers, high-output showers).
Neglecting the soil stack is the third critical mistake. When renovating, always assess the condition of the cast iron or plastic stack — if it’s near the end of its life (common in 40+ year old blocks), replace it now to avoid hacking up new tiling later.
Finally, hiring unqualified labour based on low price alone is a risk. Bathroom renovations require coordination between multiple trades — plumbers, sparks, dryliners, tilers, and decorators. Without an experienced site manager, projects overrun by weeks and trade conflicts arise at the client's expense.
Real-Life Case Study: Bathroom Renovation in a Large Block
To illustrate, here is a specific budget from a real renovation in a 72 m² flat (5.5 m² bathroom, separate WC). The client opted for a complete modernisation, including knock-through to create a single large bathroom.
Strip-out and waste removal cost €1,280, first-fix plumbing €3,150, electrical rewire €1,580, new studwork and partitions €1,420, hacking off old tiles €480, tanking and new porcelain tiling (60×60 cm) €3,850, grouting and silicone €320, mid-range sanitaryware (Ravak bath, Geberit WC, concealed basin taps) €2,900, and final decorating €620.
Total: €15,600 including VAT, representing €217/m² of flat area. The client originally budgeted €13,000; the 20% increase was due to unforeseen stack corrosion discovered after strip-out and a decision to move the WC position requiring structural sign-off.
How to Prepare for Your Renovation
A bathroom renovation in 2026 remains one of the most complex investments a flat owner can make. With proper planning, a vetted contractor, and a solid contingency, it increases the property's market value by 8% to 15%.
Before signing a contract, check references from recent projects, ideally visiting a site completed over 12 months ago. Verify if the contractor has Public Liability Insurance and provides a detailed schedule of works. Always keep a 20% to 25% contingency in your budget — in older flat blocks, this is a necessity, not a luxury.
FAQ - Frequently Asked Questions
How much does it cost to renovate a flat bathroom?
A complete renovation in a 1-bed flat in 2026 costs €9,000 to €14,000, in a 2-bed €12,000 to €18,000, and in a 3-bed €15,000 to €22,000. Price includes strip-out, services, drylining, tiling, mid-range sanitaryware, and finishing.
How long does a full renovation take?
For a 1-bed flat, it takes 4 to 6 weeks; for a 2-bed flat, 5 to 7 weeks; and for a 3-bed flat, 6 to 8 weeks. This depends on layout complexity and trade availability.
Do I need building regulations or permits?
Like-for-like surface replacements usually only require notification to the management company. Structural changes, moving soil pipes, or structural wall removals require Building Control approval and a structural engineer's report (€200 to €500).
What materials are standard for renovations?
Standard specs include PEX plumbing, copper electrical wiring, moisture-resistant plasterboard (Knauf or Rigips), porcelain tiling (60×60 cm), and brands like Geberit, Grohe, or Ravak.
Is it worth renovating an older flat bathroom?
Yes, especially in blocks over 40 years old. Legacy wiring and steel pipework are at high risk of failure. The investment boosts market value by 8% to 15% and significantly improves living standards.
What is the cost of a standalone bathroom refurb?
A standalone bathroom refurb (4 to 6 m²) without wider service upgrades costs €5,000 to €9,000 in 2026, including materials and mid-range sanitaryware. High-end finishes can push this to €12,000.
What contingency should I allow?
A standard contingency is 20% to 25%. Main drivers for extra costs are stack corrosion, damp discovered under old floors, and required electrical upgrades.
Can I stay in the flat during the renovation?
It is technically possible but very difficult — 4 to 6 weeks without a functional bathroom. For full renovations involving stack work, moving out temporarily is highly recommended.
Calculate the Exact Cost for Your Project
This overview provides an indicative range for bathroom renovations in 2026. However, your specific price can vary by 30% based on the building's age, layout, and finish quality.
Before calling a contractor, calculate a detailed estimate using the Numiq online calculator. Get a real sense of market rates, a stronger negotiating position, and the peace of mind that you aren't being overcharged. The calculator uses live trade prices and allows you to save your projects.
Professional cost estimator and construction project manager specialising in residential refurbishments and trade pricing analysis.