What Puts Buyers Off a House? The 3 Bathroom Deal Breakers to Fix Before You Sell

If you're preparing to put your home on the market, you're probably already thinking about kerb appeal, decluttering the living room and tidying up the garden. But there's one room that could quietly sabotage the entire sale, and it's the one most sellers overlook: your bathroom.

Our new research of 2,000 adults across the UK, conducted on behalf of Sanctuary Bathrooms by OnePoll in 2026, reveals that almost 9 in 10 prospective buyers (88%) say at least one bathroom problem would affect their decision to make an offer on a house. That's not a minor grumble - it's a near-universal deal-breaker. Whether you're selling a house that needs work or wondering what stops a house from selling, understanding what puts buyers off a house is the first step towards a faster, more profitable sale.

The survey offered UK residents a choice of 12 potential issues that could lead them to walk away from making an offer, ranging from evidence of mould to the bathroom's orientation. From it, three bathroom-related issues were highlighted that concern buyers more than any other - and the generational differences in how strongly they're felt are revealing.

To address these areas, Sanctuary Bathrooms has also partnered with three experts:

• Robin Edwards from leading London property buying agents, Curetons
• Jordan Yorath, Co-founder and CEO of luxury Leeds estate agents, Monroe Estate Agents
• Karim Ellington, Director of damp proofing and mould removal specialists, Total Damp Repair Ltd

Here's what the data tells us, and more importantly, what you can do about each one before the first viewing.

What Puts Buyers Off a House?

The main dealbreakers in question are a trio of bathroom sins that send buyers running: mould, space, and water pressure. These issues aren't superficial woes that a fresh coat of paint can disguise. They're fundamental troubles that signal deeper problems with maintenance, design, and the home's overall quality.

Robin Edwards agrees, stressing that these are exactly the areas sellers should prioritise: "Where improvements really pay off is in addressing the fundamentals. Buyers tend to react quickly to issues that suggest poor maintenance, such as mould, broken fittings, leaks, cracked tiles or weak water pressure. Fixing these problems before listing a property is usually money well spent because it reassures buyers that the home has been properly cared for and removes potential red flags that might otherwise put them off during a viewing.”

For sellers, the message is clear: neglect your bathroom at your peril. The full list of bathroom issues, and the percentage of people who say they would affect a decision to make an offer on a house, were as follows:

1. Signs of mould (60%)
2. Lack of space (44%)
3. Water pressure (37%)
4. Looking outdated (27%)
5. Lack of storage (27%)
6. Being the only bathroom in the property (25%)
7. If it had a shower only (23%)
8. Coloured toilets/sinks (22%)
9. If it had a bath (16%)
10. The colour scheme (15%)
11. Being north-facing/lack of sunlight (12%)
12. Lack of accessibility/being disabled friendly (11%)

Only 6% of people said none of the issues would affect their willingness to make an offer, while a further 6% did not know whether they would.

The good news? All three of the main issues people were most likely to say would affect their home-buying decisions are fixable, and with the help of this guide, you’ll be able to address them before your first viewing.

1. Mould

Probably a surprise to no one, mould in the bathroom tops the list of turn-offs by a significant margin. 6 in 10 UK residents (60%) said that the presence of mould would put them off making an offer.  

Mould has become one of the most prominent housing issues in the UK in recent years. According to the UK Health Security Agency (UKHSA), an estimated 3-4% of English homes have significant mould or damp issues in at least one room, while public awareness of health risks from household mould exposure is growing.

While mould was the top concern across all age groups, its importance as a deal-breaker intensified with age. Among Baby Boomers, 68% said mould would deter them from making an offer, compared to 61% of Gen X, 56% of Millennials, 56% of the Silent Generation, and 50% of Gen Z.  

It seems older buyers, who may have more experience with property maintenance and renovation costs, are more wary of taking on a home with visible mould. Jordan Yorath sees this regularly: "As we get older, time and disruption is something we would rather do without, then compounded by the health concerns."  

The gender split tells a similar story. Women are notably more likely to be put off by mould than men, with 63% citing it as a deal-breaker compared to 56%. When it comes to visible mould, it seems the more closely a buyer scrutinises the details, the less likely they are to overlook it.  

Yet mould isn't just an unsightly nuisance; it can often lead to costly remediation. “Over time, mould spores will continue to spread and compound, increasing contamination levels. It will also begin to deteriorate the surfaces it grows on, damaging paint, plaster, and other materials," says Karim Ellington.  

Aside from potential structural damage, mould has been well-documented to cause health problems if left unchecked. Ellington adds: “Common signs include respiratory issues, such as coughing or breathing difficulties, as well as skin irritation or allergic reactions.” 

For buyers weighing up a purchase, visible mould raises immediate red flags - not just about the bathroom itself, but about the property as a whole. "It is seen as a symptom of wider neglect with mould being different to damp, which is also far more concerning to viewers,” says Yorath. 

What Causes Mould in the Bathroom?

When asked to identify the most common underlying causes of mould within a property, Ellington explains: "The most common cause is condensation. These issues are best addressed through passive or mechanical ventilation systems, as you cannot always rely on occupants to follow best practices." However, persistent mould can signal something more serious, a wider moisture imbalance "due to trapped humidity, poor ventilation, structural defects, or inadequate insulation."  

The prevalence of mould is also growing. Ellington notes that mould is becoming more common across UK properties, driven by "a lack of awareness around proper ventilation habits, such as opening windows or avoiding drying clothes indoors" as well as "poorly maintained properties, cost-cutting on ventilation systems, or a general lack of long-term property care."  

How Do I Know if I Have Mould?

While the ramifications and causes are well understood, the signs of mould in a house can be hidden or go unnoticed as sellers become accustomed to them. Often, they're only discovered when buyers point them out during viewings. 

To identify mould before your first viewing, be sure to take note of the following signs and signals: 

Surface Mould

Many cases of mould will be found on visible surfaces. However, they are often found in overlooked areas of the bathroom that don’t receive much attention. Be sure to check these high-risk areas:  

• Ceiling corners. 
• Around bath/shower sealant. 
• Grout lines. 
• Window frames. 
• Behind the toilet and under the sink. 

Pay particular attention to black mould in the bathroom, especially around sealant and grout lines, as it's the most visually alarming form for buyers. As Ellington notes: “All mould should be treated as a concern. While certain types, such as black mould, are often highlighted, the key issue is that any mould growth indicates an underlying problem within the property that needs to be properly diagnosed and resolved.”  

Musty Smells

If you can’t see it, use your nose! A damp, earthy odour is often the clearest sign of hidden mould. It’s a very unpleasant smell that can trigger a physical reaction and instantly turn off buyers. If you can smell it, you can be certain that buyers will detect it within seconds of entering your bathroom.  

Pay attention to when the smell is strongest. If it's worse in the morning or after someone showers, you have a ventilation problem causing mould growth. If the smell doesn't go away after surface cleaning, it means mould is growing behind tiles, under flooring, or inside walls.  

Damp Walls

Walls that feel consistently damp indicate more serious problems than surface mould. Start with a simple touch test: press your palm firmly against walls, particularly external walls and areas around the bath or shower. They should feel dry and neutral temperature. If they feel cold, clammy, or damp, you have a problem. 

This is more than likely caused by condensation, but it can also be due to external factors, such as rainwater entering the exterior walls and roof or groundwater rising through the floor.  

How to Get Rid of Mould in the Bathroom

Here's the uncomfortable truth: surface cleaning only fixes surface mould. Ellington adds: “A common mistake is treating the visible mould without addressing the underlying cause, such as excess humidity or condensation. In these cases, cleaning the mould only provides a temporary solution, and it will often return quickly. Without resolving the root issue, the problem will persist regardless of how often it is treated.” 

If your walls are holding moisture, a home buyer's survey will find it. For anyone wondering what home buyer’s surveys look for, damp and mould are among the most common red flags - and a problem discovered mid-sale is far more damaging to buyer confidence than one you've already resolved. As Yorath puts it: "If you have two similar properties priced in line with one another, a buyer will go for the one which is more turnkey and requires less work." Address the cause, not just the symptoms, before your first viewing.

So where do you start? Ellington recommends tackling ventilation first: "Improving ventilation is the most effective step, particularly by installing or upgrading a high-performance extractor fan. Applying antifungal or mould-resistant paints can also help prevent surfaces from becoming a food source for mould." Simple habits too - opening windows for around 20 minutes after showering or bathing can make a noticeable difference. 

For more severe cases, professional house mould removal may be the most reliable route. This can involve antifungal and biocidal treatments, HEPA vacuuming, and anti-VOC fogging, depending on the extent of the problem. Costs vary based on severity and the treatment required, but it's almost always cheaper than the price reduction a buyer will demand if mould is flagged during a survey. 

For a full step-by-step walkthrough on how to get rid of mould in the bathroom - including tiles, grout, and sealant - check out our complete guide on how to clean bathroom mould. 

2. Space

Next up on the list of house-buying woes, cited by over 2 in 5 (44%) of respondents, is space; more specifically, the lack of it. Unlike mould, which is a maintenance failure, a cramped bathroom feels like a design limitation, one that buyers often assume they’ll be stuck with.  

Space concerns are broadly consistent across age groups, though Boomers (48%) and Millennials (46%) scrutinise the lack of bathroom space the most, perhaps reflecting different life stages with similar needs. Millennials with growing families require room for bath-time chaos, while Boomers want comfortable, accessible spaces as they age. Gen X (41%), Gen Z (37%), and the Silent Generation (37%) showed slightly less concern, but it remains a concern nonetheless. 

“When buyers complain about a lack of space in a bathroom, they’re often referring as much to layout as to actual square footage. A bathroom might technically be large enough, but if the basin, toilet and shower are tightly packed together, it can feel awkward and cramped during a viewing”, explains Edwards.

Interestingly, in the context of space, the lack of storage was a particular issue for the Silent Generation, at 34%. This likely reflects decades of accumulated bathroom essentials and insufficient bathroom furniture to house and keep them organised. It's a concern that resonates across generations, too.  

Yorath notes that storage is an issue across all property types: "In the bathroom we have so many products nowadays, so having space for them - towels and dressing gowns included - [is something] people moving know they need." 

While men and women are almost equally concerned about space itself (44% vs 43%), our data revealed more striking disparities: women are less concerned about space and more concerned with a bathroom's functionality. Women are significantly more likely than men to be put off by a home that only has a shower and no bath (28% vs 19%), by a property with just one bathroom (28% vs 21%), and even by coloured toilets and sinks (26% vs 18%). These aren't minor cosmetic grumbles; they reflect deeper concerns about whether a bathroom can practically serve a household's needs. 

Yorath echoes this, stressing the importance of retaining a bath where possible: "I would always encourage homeowners to ensure a house always retains at least one bath, even with a shower above." 

How Do I Know If I Don’t Have Enough Bathroom Space?

Sellers often underestimate space problems because they've adapted to their bathroom over time. Buyers, however, will immediately assess whether there's adequate space for their needs. 

To best identify such issues before viewings, it’s a good idea to take a step back and critique your space honestly. Put yourself in the shoes of a potential buyer, analyse your bathroom the way a buyer would, and ask yourself the following questions: 

• Is there enough storage for our toiletries? 
• Can two people get ready at the same time? 
• Where would we put towels, toilet rolls, and cleaning supplies? 
• Does this bathroom feel cramped? 

How to Maximise Space in the Bathroom

If you're wondering whether to update your bathroom before selling, space optimisation should be one of the primary improvements to make to dramatically change how your bathroom looks and functions. 

Edwards adds: “The most cost-effective improvement before selling is usually rethinking the layout or replacing bulky fixtures with more compact ones rather than undertaking major structural work.”      

To help, here are a few straightforward improvements to consider, most of which are budget-friendly DIY ideas that don't require a professional: 

Prioritise the Quick Wins

While it may not be feasible or within your budget to knock down walls before putting your house up for sale, you can make your bathroom feel significantly more spacious with a few simple, strategic changes, such as:  

• Decluttering: This technique costs nothing and takes about an hour, but the impact is immediate. Remove everything from surfaces and visible storage, storing only essentials like hand soap and a single hand towel.  
• Painting: While white, light grey, or soft cream can effortlessly make a space feel larger, identify a bathroom colour and scheme that would best suit your space. Use the same colour throughout for continuity and choose a matt or satin finish rather than gloss, which looks cheap and overly reflective. You can paint a small bathroom for £50-80 in materials over 2-3 hours. 
• Utilising strategic lighting: Get to know colour temperatures and replace dim bulbs with bright daylight LED bulbs (6000K). Better yet, consider upgrading to a brighter ceiling light fitting, or adding LED strip lighting under cabinets or mirrors if possible. Ensure all lights work, as buyers always test switches during viewings. This all takes 30 minutes to 2 hours and costs between £30 and £100.

Choose Wall-Hung Fixtures

To add functional storage while maintaining a spacious feel, the key is freeing up visible floor space. Doing so creates a sense of openness with cleaner lines and a minimalist interior design aesthetic. 

Aside from bathroom furniture solutions, such as wall-hung vanity units, there are options for sanitaryware, including a wall-hung toilet, both priced at £300-£700 fitted. Better yet, both options are also available in compact or short-projection versions, with reduced depth to create more walkway space. 

Opt For a Bathroom Remodel

For genuinely cramped bathrooms where cosmetic changes won't suffice, or properties where bathroom investment will recoup costs, layout reconfiguration may be worth considering. However, compared to a bathroom renovation, this is certainly the most costly route as it involves a complete overhaul of the space, often spanning 4-8 weeks and including demolition, plumbing/electrical updates, waterproofing, and tiling.  

3. Water Pressure 

The last of our trio of bathroom deal-breakers is poor water pressure, which 37% of respondents cited. It might not be the first thing you think of when staging a home, but as Yorath puts it: "No one wants to be dribbled on first thing on a morning!" 

Age correlates with concern here, too. Boomers led at 43%, followed by Gen X at 36%, and Gen Z and Millennials at 34% each. The Silent Generation shows the least worry at 29%, perhaps reflecting different bathing habits or simply prioritising other factors, such as the aforementioned storage space. 

This is one of the few areas where men are slightly more concerned than women - 38% versus 36%. While the gap is small, it reinforces the point that a powerful, reliable shower is a near-universal expectation regardless of gender. 

Poor water pressure turns many bathroom routines into frustrating experiences - showers spray out a trickle, basins take forever to fill, and toilet flushes may not clear the pan completely. Furthermore, in some cases, low pressure can increase water consumption, leading to higher utility bills. 

“From a buyer’s perspective, poor water pressure usually becomes apparent the moment they imagine using the shower. If the shower feels weak or if taps take a long time to fill a basin or bath, it raises questions about the plumbing system. Buyers may not always test it directly during a viewing, but it’s something that often comes up in surveys or second visits”, says Edwards. 

How Do I Know If I Have Low Water Pressure?

Many sellers have lived with poor water pressure for so long that they've normalised it. What feels ‘normal’ to you might be a significant problem for buyers who will test your taps and shower during viewings.  

Low water pressure affects many UK households, and the reasons are plentiful. For example, if you live above your local reservoir or on a hill, or even something as simple as a partially closed shut-off valve.  

For a full guide to understanding normal water pressure, how to test it, and how to increase it in your bathroom, take a look at our complete guide to water pressure. 

Preparing Your Bathroom for a House Sale

With 88% of buyers citing at least one bathroom issue as a deal-breaker, this is one of the highest-impact rooms to get right before listing and, fortunately, one of the most straightforward to improve. 

As Edwards puts it: “Fixing these problems before listing a property is usually money well spent because it reassures buyers that the home has been properly cared for and removes potential red flags that might otherwise put them off during a viewing.” 

Start with mould: it's the most common concern and often the cheapest to resolve. From there, look at how your space feels - decluttering costs nothing, and even modest upgrades like wall-hung fixtures can dramatically change a buyer's perception. Finally, test your water pressure and address any issues before a surveyor does it for you. 

Yorath's advice to sellers is straightforward: "Overpopulated spaces and clutter, dark decoration, smells and visible damage should be a priority. If you can create a clear, light home which appeals to the senses, this is a good start." 

If you're preparing your bathroom for sale and want to make the most of your space, our team can help. Contact us today or book a free 3D bathroom design consultation with a professional to get the most out of your space.