Homeowners planning bathroom renovations are in for a shock as new research reveals a dangerous gap between expectation and reality that leaves consumers vulnerable to cowboy builders offering lower quotes.
New research carried out by the Federation of Master Builders (FMB) has found that 71% of homeowners, or seven in ten expect their bathroom renovation to come in under £10,000. However, professional builders are warning that skilled labour, quality fittings, plumbing complications and unforeseen structural issues frequently push the final bill far higher.
The data exposes a widespread misconception that puts homeowners at risk: a quarter (26%) believe a full bathroom renovation can be done for under £5,000, while only 14% expect to pay £10,000-£15,000 and just 3% anticipate costs of £15,000 or more.
The research also reveals homeowners are getting the fundamentals wrong. While 38% correctly identify labour as the single most expensive element of a bathroom renovation, many still fixate on the cost of fittings (17%) or plumbing (16%) and a significant proportion admitted they simply don’t know where their money will go.
Timeline expectations are equally divorced from reality: nearly one in five (19%) expect a full bathroom renovation to be completed in a week or less, while 39% expect it done within two weeks – schedules that professional builders say are unrealistic for quality work involving strip-outs, drying time, and coordinating multiple trades.
Brian Berry, Chief Executive of the Federation of Master Builders, said:
“Bathroom renovations are one of the most common home improvement projects, but our research shows homeowners are walking into them with unrealistic expectations about both costs and timelines. The gap between what people think they’ll pay and what they actually need to budget is setting them up for disappointment – or worse, pushing them towards rogue traders offering unrealistic quotes and timelines.
“When someone thinks a full bathroom can be done for £3,000 in five days, they’re prime targets for cowboys who will take a deposit, do substandard work and disappear. Most homeowners are budgeting for the bathroom they imagine, not the bathroom they’ll actually get. Labour alone can swallow half the budget before a single tile goes up.”
One homeowner who contacted the FMB after botched bathroom renovation said:
“I don’t take baths anymore. It’s hard to relax when you look around your bathroom and see thousands of pounds you’ve wasted. Our quote came in at under half the price of installers from the retailer we bought materials from and we thought we’d get a bargain. Instead, we were left with uneven tiles, squiggly sealant, damaged fixtures including our toilet, and a radiator that doesn’t work. Eventually the whole thing will need to be stripped out and replaced. Everyone needs to start somewhere but as a consumer you shouldn’t be paying for someone to learn on your property.”
FMB London President and Director of FMB member companies AMIC Ltd and Nest Building group, said:
“We see this expectation gap every week. Clients come to us thinking a bathroom renovation will cost £6,000 and be done in five days, and we have to walk them through the reality. Quality work takes time – you’re coordinating plumbers, electricians, tilers, sometimes structural work. Rushing it is how you end up with leaking showers and cracked tiles six months down the line.
“The internet has made everyone think they’re an expert after watching a few YouTube videos or ordering tiles online based on how they look in a photo. But bathrooms are technical environments – you need proper waterproofing, the right substrate preparation, tiles that can handle moisture and temperature changes. That’s why we work closely with Village Ceramics in Oxshott. They offer specialist technical advice you simply can’t get from scrolling online. They understand how different tiles perform in wet environments, what adhesives and grouts to use for specific applications, and how to avoid the problems that only show up months later. Going to real experts who can see your space and ask the right questions – that’s the difference between a bathroom that lasts and one that fails.”
The findings come as the FMB intensifies its campaign for a statutory licensing scheme -which would help protect homeowners – who have already lost 14.3bn to rogues over the last 5 years across the UK