What Really Goes Wrong in a Rental Property, And How to avoid it

The implication for landlords: If you are going to invest in preventative maintenance, the best time is late summer or early autumn, before the peak season hits. An annual boiler service in September, gutter clearing in October and extractor fan checks before winter can dramatically reduce the January rush.

Where Does the Money Go?

When we break down our total maintenance spend by category, a clear picture emerges. The same handful of areas account for the vast majority of both cost and volume:

• Kitchen & Appliances: 15% of jobs at an average cost of £150
• Bathroom & Toilet: 12% of jobs at an average cost of £183
• Heating & Boiler: 9% of jobs at an average cost of £221
• Water & Leaks: 6% of jobs at an average cost of £256
• Walls, Floors & Ceilings: 4% of jobs at an average cost of £382
• Everything else: doors, windows, laundry, cleaning, pests, lighting…

Kitchens, bathrooms, heating and plumbing together account for 42% of volume. These are the areas with the most moving parts, the most daily use and the most potential for things to go wrong.

The Top 20: What Actually Breaks

Here is the full breakdown of the 20 most common reactive maintenance issues we deal with, ranked by number of jobs, along with what they typically cost:

The standout: Mould and damp, while only 7th by volume, is by far the most expensive issue per job at an average of £624. It is also increasingly important under the Renters’ Rights Act and Awaab’s Law, which will require landlords to investigate damp and mould hazards within 14 days and begin repairs within a further 7 days.

What Can Landlords Do to Prevent the Most Common Issues?

The good news is that many of the most frequent and costly maintenance problems are preventable with relatively modest investment. Here is what we recommend based on what we see every day:

1. Annual Boiler Service (£135 through Hello Neighbour)

The single most effective preventative measure. A yearly service catches failing components before they become emergency call-outs in January. Boiler repairs are our 3rd most common issue and cost £418 on average. Our data shows heating issues are six times more common in January than June. An autumn service is the smartest investment a landlord can make.

2. Extractor Fan Checks (included in every inspection)

Bathroom extractor fans are critical for preventing damp and mould, our most expensive issue category. A fan that stops working quietly leads to condensation, which leads to mould, which leads to a bill averaging £624. Checking fans at every six-monthly inspection is part of our standard process.

3. Gutter Clearing (£75–£150/year)

Blocked gutters cause water to run down external walls, creating damp patches internally. Gutter clearing once or twice a year is one of the cheapest ways to prevent some of the most expensive repair bills. Best done in autumn before winter rains begin.

4. Appliance Age Tracking (10% Currys discount for landords)

Washing machines, dishwashers and ovens are among our top 7 issues. Most have a 7–10 year lifespan. Tracking appliance age and budgeting for planned replacement avoids emergency call-outs and tenant frustration. Hello Neighbour Landlords also get a 10% discount at Currys for white goods replacement.

5. Leak Detection Awareness (free)

Leaks are our number one issue by volume. Educating tenants on what to look for, and encouraging them to report small drips early, prevents the cascading damage that turns a £100 fix into a £1,000+ remediation. Our platform makes reporting instant and simple.

6. Ventilation Guidance for Tenants (free)

Many mould issues stem from condensation caused by lifestyle factors: drying clothes indoors, not opening windows, blocking vents. A simple guide at move-in on ventilation can prevent problems. We saw 158 mould and damp issues costing £70K in our data. Most were avoidable.

7. Pest Prevention (£50–£100)

Rodent issues cost an average of £308 per job and are stressful for tenants. Ensuring external gaps are sealed, bins are properly stored and entry points are blocked during void periods is far cheaper than a pest control call-out.

8. Six-monthly Inspections (£85 through Hello Neighbour)

Our data shows 48% of issues are flagged by our agents, not tenants. Regular inspections catch problems early: a small leak, a failing window seal, early signs of damp. At Hello Neighbour, every managed property gets a six-monthly inspection as standard.Who Reports the Problems?

Our data shows that maintenance issues are reported by three groups, and the split is telling:

• 40% from tenants who report issues directly through the platform

• 48% flagged by our property management agents, either during six-monthly inspections or through ongoing property oversight

• 12% from contractors who spot additional problems while carrying out other work on the property

This is significant. Nearly half of all issues are identified by our team, not the tenant. That means a huge proportion of problems would go unnoticed in a self-managed property until they had escalated into something more serious and more expensive.

It is one of the core reasons we carry out six-monthly property inspections on every managed property. These inspections are not tick-box exercises. They are structured, detailed walkthroughs that catch the early signs of problems: a small damp patch forming behind a basin, a window seal starting to fail, an extractor fan that has stopped working quietly, early signs of condensation on walls. Catching these early is what prevents a £100 fix from becoming a £1,000 remediation.

“Taking reasonable steps to tackle damp and mould is not only about looking after your tenant’s health, it is your responsibility. Agents are well placed to identify early signs of damp, disrepair and serious hazards.”

Propertymark, analysis of the English Housing Survey 2024–25

Your Dedicated Property Manager: Why Continuity Matters

Every Hello Neighbour managed property is assigned a dedicated property manager. This is not a call centre or a rotating rota. It is one person who knows your property, knows its history, knows the tenant, and knows where the likely issues are.

Because we are a technology-first company, every interaction, every reported issue, every contractor visit, every inspection and every cost is recorded on our platform. That means your property manager is not relying on memory. They have a complete, searchable history of everything that has happened at your property, and they can spot patterns before they become problems.

If a boiler has needed two repairs in six months, your property manager will flag it and recommend replacement before it fails entirely in January. If a property has a history of condensation issues, they will ensure ventilation is checked at every inspection and that the tenant has clear guidance on preventing mould. That kind of proactive, informed management is only possible when you combine a dedicated individual with comprehensive data.

Trusted Tradespeople: Quality You Can Rely On

The quality of the contractor who turns up at your property matters enormously. A poorly executed repair does not just fail to fix the problem; it can create new ones, damage the property and erode tenant trust.

At Hello Neighbour, we work with a curated network of trusted tradespeople. Every contractor on our platform has been vetted, reviewed and is held to a clear standard. We track their performance across every job: response times, quality of work, tenant feedback and cost. If a contractor does not deliver, we remove them from the platform. It is that simple.

This approach means landlords do not have to worry about finding reliable tradespeople themselves, and tenants know that when someone turns up to fix an issue, they are qualified, professional and accountable. It also means we can often negotiate better rates through volume, keeping costs down for landlords without compromising on quality.

The Industry Picture

Our findings sit squarely in line with what the wider industry is reporting. The NRLA’s Landlord Trends Q3 2025 research (conducted by Pegasus Insight, surveying 750 landlords per quarter) found that maintenance and repairs now absorb between 31% and 39% of total landlord expenditure depending on the type of property.

Towergate Insurance data, reported by Landlord Today in April 2025, showed that damage repair costs have increased by 121% in just two years. The average landlord now spends £1,374 per year on maintenance, though estimates from Aduivo in Nov 2025 suggest the true figure may be closer to £3,832 when all common repair categories are included.

The English Housing Survey 2024–25 found that 22% of privately rented homes fail the Decent Homes Standard, and that damp was identified in 10% of PRS properties by surveyors. Propertymark’s analysis of the same data highlighted that letting agents are well placed to identify early signs of damp, disrepair and serious hazards, and to ensure remedial works are carried out promptly.

Awaab’s Law: Under the Renters’ Rights Act, landlords will be required to investigate damp and mould hazards within 14 days and begin repairs within a further 7 days. Our data shows mould and damp remediation averages £624 per job. Catching it early through regular inspections and proper ventilation can prevent it entirely. The exact implementation date for this is not yet confirmed but is expected late 2026.

What Does This Mean for Landlords?

The data tells a clear story. Property maintenance is not random. The same issues occur repeatedly across different properties, in predictable patterns, at broadly predictable costs, and at predictable times of year. That means landlords who take a proactive approach will spend less over time than those who wait for things to break.

It also means that having a property management partner who logs every issue, tracks trends across your portfolio, catches problems early through regular inspections and uses trusted, accountable tradespeople is not just a convenience. It is a financial strategy.

At Hello Neighbour, every maintenance issue is logged on our platform from the moment a tenant reports it (or our team spots it) through to resolution. Every property has a dedicated property manager who knows it inside out. Every contractor is vetted and performance-tracked. And every property gets a six-monthly inspection as standard.

That data does not just help us fix today’s problems. It helps us prevent tomorrow’s.

“Landlords who take a proactive approach will spend less over time. Go for an annual boiler service in September, get gutters cleared in October, and check extractor fans before winter to avoid high costs in January.”

Sources & Further Reading

Hello Neighbour internal maintenance data: 4,052 reactive jobs across 868 managed properties (last 12 months)

NRLA & Pegasus Insight: Landlord Trends Q3 2025 (750 landlords surveyed quarterly)

Landlord Today / Towergate Insurance: Landlords’ maintenance and repair costs soar (April 2025)

English Housing Survey 2024–25: Headline findings on housing condition, safety and energy performance

Propertymark / Letting Agent Today: Letting agents key to raising rental property standards (February 2026)

Property118 / Aduivo: Landlords should set aside a quarter of rental income for maintenance (November 2025)