September is one of the best times for London landlords to inspect their properties. Heavier rain, colder nights and increased use of heating can turn a small maintenance issue into an expensive emergency.
A blocked gutter can become penetrating damp. A minor boiler fault can leave tenants without heating. Poor ventilation can contribute to condensation and mould once windows remain closed for longer. Acting early protects tenants, reduces avoidable repair costs and helps preserve the property’s long-term value.
1. Inspect the roof, gutters and exterior
Clear leaves and debris from gutters, check that downpipes are secure and confirm that water is carried away from the building rather than discharged against a wall. Look for slipped roof tiles, damaged flashing, loose render, gaps around windows, overflowing gutters and blocked drains. Flat roofs and roof terraces deserve particular attention because standing water can expose weaknesses that were not obvious during summer.
Landlords in England are generally responsible for maintaining the property’s structure and exterior. Photographing the inspection and recording work instructed creates a useful maintenance history.
2. Service heating before it is urgently needed
Do not wait for the first cold weekend to discover that a boiler, radiator or thermostat is not working. Test the heating, bleed radiators where necessary and check that thermostats and programmers operate correctly.
If the property has gas appliances, the landlord must arrange a gas-safety check by a Gas Safe registered engineer every year. The Health and Safety Executive says each appliance and flue must be checked within 12 months of installation and then at intervals of no more than 12 months.
Boiler servicing is not identical to the statutory gas-safety check, but regular servicing can identify wear, maintain efficiency and reduce the risk of a mid-winter breakdown.
3. Treat damp and mould as a property issue
Revisit previous reports of condensation, damp smells, staining or mould. Check external corners, behind furniture, around window reveals, beneath roofs and near bathrooms or kitchens.
Government guidance is clear that landlords should identify and tackle the underlying cause, including building defects, inadequate ventilation or condensation. Simply cleaning visible mould is unlikely to prevent its return. Landlords should not delay action while waiting for medical evidence, particularly where health concerns are reported.
After remedial work, the guidance recommends inspecting the home again at least six weeks later. Advice to tenants about heating and ventilation can help, but it must never replace necessary repairs.
4. Test alarms and review fire safety
Private landlords in England must provide at least one smoke alarm on each storey containing living accommodation. A carbon-monoxide alarm is required in any room used as living accommodation containing a fixed combustion appliance, excluding gas cookers.
Required alarms must work at the start of a new tenancy. If a landlord is informed that an alarm is faulty and confirms the fault, it must be repaired or replaced. Autumn inspections are a sensible opportunity to test alarms and check their age.
HMOs and converted flats may have additional obligations. Escape routes, fire doors, emergency lighting and alarm systems should be reviewed against the requirements for the building and its licence conditions.
5. Check electrical safety
Landlords must have electrical installations in rented homes inspected and tested by a properly qualified person at least every five years. Check the date and recommendations on the current Electrical Installation Condition Report rather than assuming it remains valid until the tenancy changes.
Visually inspect sockets, switches, consumer units, extractor fans and landlord-supplied appliances for heat damage, loose fittings or damaged cables. Portable heaters and overloaded extensions become more common in colder weather, so tenants should be reminded to report concerns. Urgent faults belong with a competent electrician.
6. Prevent frozen pipes and water damage
Insulate vulnerable pipes in lofts, external areas and poorly heated cupboards, and confirm that external taps are protected. Make sure tenants know where the internal stopcock is and how to contact the landlord or managing agent in an emergency.
Check seals around baths and showers, signs of leakage beneath sinks and appliances, and dripping overflow pipes. In blocks of flats, even a small leak can damage several homes.
7. Improve ventilation without compromising warmth
Extractor fans in kitchens and bathrooms should work effectively and vent outside, not into a loft or enclosed void. Clean grilles, check trickle vents and make sure windows open and close properly.
Give tenants practical, respectful guidance: use extractor fans, avoid covering vents, report leaks promptly and maintain reasonable heating where possible. However, recurring condensation should trigger an assessment of insulation, heating, ventilation and the building fabric—not an automatic assumption that the tenant is responsible.
8. Record the inspection and follow through
Keep dated photographs, contractor reports, certificates, access correspondence and a clear schedule of outstanding actions. Where access is difficult, communicate in writing, explain why the visit or repair is necessary and retain a record of reasonable attempts to arrange entry.
Prioritise hazards and loss of essential services, while booking less urgent work before winter demand makes contractors harder to secure.
Prevention is better property management
An organised autumn inspection is not simply a compliance exercise. It improves the tenant experience, reduces emergency call-outs and gives landlords better control over expenditure. A small repair completed in September can prevent a much larger insurance claim in December.
At Hampshire Heights, we provide hands-on property management, inspections and maintenance coordination for landlords across London. If you would like your rental property or portfolio reviewed before winter, contact Hampshire Heights and let us help you put a practical maintenance plan in place.
Hampshire Heights Ltd
Telephone: 020 3976 8331
Email: info@hheights.co.uk
