Damp and Mould in UK Housing: The 2026 State of Play

Five years after Awaab Ishak's death drew the country's attention to damp and mould in social housing, the UK is in the middle of a regulatory and operational scramble. The legal framework has been overhauled. Tenant expectations have shifted. Survey volumes have roughly doubled. And yet, by every measurable indicator — Housing Ombudsman complaints, English Housing Survey data, reports of mould-related illness — the underlying problem has not yet started to recede.

This piece sets out where the UK damp and mould crisis stands in 2026, what the data tells us, and where the pressure is heading.

The scale

The most recent English Housing Survey estimates that around 900,000 homes in England have damp problems, with social housing and the lower end of the private rented sector disproportionately affected. The figure has been broadly flat for three years despite increased remediation activity — evidence that the rate of new cases is keeping pace with the rate of fixes.

Housing Ombudsman complaints relating to damp and mould have risen sharply year on year since 2022. Determinations against landlords for "severe maladministration" in damp cases have become routine where they were once exceptional. The ombudsman's 2024 spotlight report, It's Not Lifestyle, was the explicit framing shift — from treating mould as a tenant-behaviour issue to treating it as a landlord-responsibility issue.

The legal architecture

Three intersecting pieces of legislation now govern damp and mould response in England:

• Awaab's Law (Social Housing (Regulation) Act 2023, commenced October 2025): statutory timeframes for social landlords to investigate and remedy damp and mould hazards. See our primer for surveyors.
• Renters' Rights Act 2025 (commenced April 2026 for damp and mould duties): extends the Awaab's Law framework into the private rented sector. Read our analysis.
• Revised Decent Homes Standard (commenced April 2026 for social housing, October 2026 for PRS): treats damp and mould as an explicit failure criterion with objective thresholds. Detail here.

The combined effect is that damp and mould are no longer a soft regulatory issue. They are statutory, time-bound, and carry direct enforcement consequences for landlords across every tenure.

Why the crisis hasn't turned a corner

Several structural factors keep the case rate elevated despite the regulatory pressure.

Housing stock age

The English housing stock is among the oldest in Europe. Pre-1919 housing accounts for around a fifth of all dwellings and is disproportionately likely to have damp problems — absent or compromised damp-proof courses, solid walls without thermal upgrade, original sash windows that perform poorly on ventilation. Retrofit programmes are addressing this slowly, but the run-rate is decades not years.

Energy efficiency tension

The push to decarbonise housing has, in some cases, made damp and mould worse. Internal wall insulation applied without proper thermal-bridging analysis creates new condensation zones. Airtightness improvements without compensating ventilation upgrades reduce moisture clearance. Heat pumps installed without commensurate fabric work can leave properties running cooler with less convective air movement. Many of the 2024–2026 mould cases that have reached the ombudsman involve homes that were retrofitted "for energy efficiency" within the previous five years.

Fuel poverty

The mid-2020s cost-of-living period left many tenants under-heating their homes. Cold surfaces become condensation sites. The ombudsman has been clear that fuel poverty is not a tenant failure mode — it's an environmental factor the landlord must design around — but in practice, fuel-poor households continue to face disproportionate damp risk.

Surveyor capacity

The new statutory framework has roughly doubled demand for damp surveys. The supply of qualified damp surveyors has not doubled. The result is delays at the survey stage, which compress all the downstream remediation deadlines. Stock teams report difficulty getting an inspection inside the Awaab's Law 14-day window even when they instruct on day 1.

What's working

Despite the headline picture, parts of the response are working:

• Proactive stock surveys. Housing associations that have moved to systematic damp-and-mould stock condition surveys are identifying problems before tenants escalate. Reactive complaint volumes are starting to fall in the early-mover associations.
• Standardised data capture. The shift from free-text observations to structured findings (mould area in m², specific moisture readings, vulnerability flags) is making case management possible at scale. Spreadsheet-based stock teams are giving way to platform-based ones.
• Faster reporting. Surveyors who have moved to on-site reporting are turning around cases inside the statutory window with margin to spare. The 9pm-Word-document model is dying off — slowly — under the simple pressure that it can't hit the deadlines.
• Mechanical ventilation upgrades. Humidity-sensing dMEV systems and central MVHR retrofits are starting to feature heavily in remedial recommendations and are demonstrating measurable reductions in repeat cases.

What isn't working

• Verbal "guidance" to tenants. The pre-2022 default of telling tenants to "open a window and wipe the walls" is now actively causing maladministration findings. Many landlords still do it.
• Single-pass remediation. A surveyor visits, recommends works, the works happen, the case is closed. Three months later the mould returns. The case rate is punishing landlords and managing agents who don't do follow-up inspections.
• Disconnected systems. Survey data in one system, asset management in another, complaints in a third. Cases fall through the cracks. The data ecosystem will need consolidating before the regulatory burden becomes manageable.

Where this is going

Looking forward to 2027 and 2028, three trends are clear:

1. Wider regulatory scope. Awaab's Law tier 2 is scheduled for commencement in 2027, bringing additional hazard categories under statutory clocks. Surveyors will see further volume increase.
2. Data-driven enforcement. The Regulator of Social Housing is moving toward annual structured returns on damp and mould prevalence. PRS local-authority enforcement is being resourced for proactive inspection. The era of self-certification is ending.
3. Consolidation in the survey market. The combination of regulatory complexity, structured data requirements, and statutory deadlines is squeezing out single-person spreadsheet-and-Word operations. Expect a shake-out toward platforms that handle compliance, audit, and data export by default.

The role of the working surveyor

The crisis is too systemic for any one profession to solve alone — it requires retrofit funding, ventilation policy, building regulation reform, and tenant rights enforcement. But damp surveyors are the professionals at the sharp end. A well-written, defensible damp report does three things at once: it protects the tenant from a recurring health risk, it protects the landlord from regulatory failure, and it produces the data that, in aggregate, will let the country measure whether the legal framework is actually working.

Whatever survey software you use — ours or anyone else's — the move from observational to evidential reports is the single most important shift the profession is making this decade. See our guide to writing defensible damp survey reports for the practical detail.