landlords
Mould and Damp in London Rental Properties: Landlord Responsibilities
Types of Damp in London Properties
Understanding the type of damp is essential to determining responsibility:
Rising Damp
Ground moisture rising up through walls due to failed or absent damp proof course (DPC). A structural issue — always the landlord's responsibility.
Penetrating Damp
Water entering from outside through defects in the building fabric — failed pointing, cracked render, defective guttering, failed roof. Always the landlord's responsibility under Section 11.
Condensation Damp and Mould
The most common type in London flats and houses. Moisture-laden air condenses on cold surfaces and feeds mould. Responsibility is contested — caused by a combination of inadequate ventilation (structural issue, landlord's responsibility), inadequate insulation and heating (landlord), and tenant behaviour (insufficient heating, drying clothes indoors, insufficient ventilation).
The Homes (Fitness for Human Habitation) Act 2018
The Fitness for Human Habitation Act (FFHA) 2018 implies a term into all residential tenancy agreements in England that the property is fit for human habitation at the start of the tenancy and throughout. Properties with serious damp and mould issues fail this standard — regardless of the cause.
Frequently asked questions
Can tenants withhold rent because of mould in a London property?
Tenants cannot legally withhold rent unilaterally. However, tenants can apply to the First-tier Tribunal under the Housing Act 2004 for a Hazard Awareness Notice or Improvement Notice if the council is not acting. Under the Homes (Fitness for Human Habitation) Act 2018, tenants can sue the landlord in the County Court for breach of the implied covenant — this can result in damages, rent repayment orders, and orders requiring repair.
What ventilation is required in London rental properties?
Under Building Regulations Part F, habitable rooms should have background ventilation (trickle vents) and kitchens and bathrooms should have mechanical extract ventilation. Many older London properties (pre-2006 builds) lack adequate ventilation — landlords carrying out works should upgrade ventilation. Failure to provide adequate ventilation contributes to condensation mould and may constitute a hazard under the Housing Health and Safety Rating System (HHSRS).
How quickly must a London landlord address mould and damp?
There is no statutory timescale, but under the FFHA 2018 the property must be fit throughout the tenancy — persistent serious mould is a breach. Practical guidance suggests: acknowledge the problem within 24 hours, carry out investigation within 14 days, and commence remedial work within 30 days for non-structural condensation damp. Structural issues (rising or penetrating damp) should be treated as urgent repairs.