Untreated condition in your home can slash value by £53,000 – ‘buyers will negotiate a lower price’

Untreated mould could slash property values by a staggering £53,000 as the spring housing market gains momentum.

New data showed homeowners face losing up to 20 per cent of their property’s value if mould issues aren’t addressed.

The warning comes at a crucial time for sellers, with Rightmove data showing February and March as prime months for property sales.

Seven in 10 sellers successfully close deals during this period, making it vital for homeowners to tackle mould problems before listing.

Experts warned that visible signs of damp could derail sales or lead to significant price reductions as buyers become increasingly cautious about potential health risks.

Mould is far more widespread in British homes than many realise, according to new Uswitch data. More than 60 per cent of Britons report having mould in their properties, painting a concerning picture for the housing market.

Nearly half of these cases occur in mortgaged properties, challenging the common misconception that mould primarily affects rental accommodation.

This revelation suggests homeowners may be overlooking a serious issue that could significantly impact their property’s value when selling. With such high prevalence across owned homes, experts urged mortgage holders to take immediate action before listing their properties this spring.

Property-lending expert at Buzz Capital Alena Walker said: “Potential buyers are wary of the health risks associated with mould and the high costs of remediation. Many will factor in these expenses when negotiating a lower price, or may avoid the property altogether.”

The average UK house price currently stands at £267,700, according to Zoopla. A 20 per cent reduction due to mould issues would therefore slash property values by over £53,000. With rising energy costs making it harder to heat homes effectively, damp and condensation problems are becoming increasingly common.

This creates a perfect storm for homeowners looking to sell this spring. Home maintenance specialist and founder of Saxton Blades Glen Peskett added: “Check your walls and ceilings for water stains, flaking paint or wallpaper, and warped skirting boards or floors as these are all indicators of water damage.”

Black, green, or white patches on walls or ceilings are strong signs of mould requiring immediate attention.

A distinct musty smell often pervades damp spaces. Walls or ceilings that feel cold or damp to touch indicate moisture issues. Condensation, such as water droplets on windows or cold surfaces, suggests moist air is meeting cooler surfaces.

These warning signs should not be ignored by homeowners preparing to sell. Preventing mould is crucial for maintaining property value, according to experts.

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Glen advised: “Keeping your home warm, especially in these colder months, can help prevent mould.” For those struggling with energy costs on standard variable tariffs, switching to a fixed energy deal could be beneficial.

Simple DIY methods can also make a significant difference. These include pulling furniture away from walls to improve air circulation. Keeping lids on pans while cooking reduces moisture in the air.

Drying clothes outside where possible, rather than indoors, can substantially decrease humidity levels. These small changes can help homeowners protect their property’s value ahead of a potential sale.

Alena added: “Mould and damp don’t always indicate severe structural issues. Sometimes, a few loose roof tiles can lead to a leak, which is easily fixed.

“If left unchecked, more serious problems such as timber rot or cracks in walls can result in costly repairs.

“If you’re buying, always get a professional survey to protect yourself against any hidden damp-related costs.”