How to Maintain Your Rental Property

Maintenance is where landlord obligations become most visible, and most consequential. Get it right and you protect your asset, retain good tenants, and stay on the right side of the law. Let it slip and you face a compounding problem: a deteriorating property, rising repair costs, and, under legislation now in force, financial penalties that can reach £30,000 (gov.uk, 2025). This guide sets out what you are legally required to do, how to build a maintenance routine that keeps costs manageable, and where South London landlords in particular should pay close attention.

Your Legal Obligations

The foundation of your repair duties as a landlord is Section 11 of the Landlord and Tenant Act 1985. This implies repairing obligations into every residential tenancy and cannot be contracted out of, regardless of what any tenancy agreement says. Under it, you are responsible for:

• The structure and exterior of the property: walls, roof, foundations, external doors and windows
• Installations for the supply of water, gas, electricity and sanitation
• Heating and hot water systems, including boilers and water heaters
• Electrical wiring, sockets and fuse boxes
• Gas pipework and appliances

The Renters’ Rights Act 2025, which received Royal Assent on 27 October 2025, significantly raises the stakes. Under the Act, landlords with outstanding Category 1 hazards or unresolved maintenance issues that affect habitability can be barred from using specific eviction grounds. The practical message is straightforward: an unresolved repair problem is no longer just a maintenance issue, it is a legal liability that can affect your ability to manage your tenancy.

The Decent Homes Standard, extended to the private rented sector under the same legislation, sets a baseline for property condition that all landlords must meet. Properties with Category 1 hazards under the Housing Health and Safety Rating System (HHSRS) are in breach. According to the Private Rented Sector English Housing Survey, 10% of private rented properties still have Category 1 hazards (down from 14% in 2021), and 9% have a recorded damp problem (gov.uk, January 2025). Both figures represent real enforcement risk.

Statutory Safety Certificates

Beyond general repair duties, several specific safety obligations require annual or periodic compliance:

• Gas safety: A Gas Safe registered engineer must inspect all gas appliances and pipework every twelve months. You must provide the current certificate to tenants within 28 days of the inspection, and to new tenants before they move in.
• Electrical safety: A fixed wiring inspection (EICR) is required every five years, carried out by a qualified electrician. Any remedial work identified must be completed within 28 days.
• Energy Performance Certificate: An EPC rating of E or above is the current minimum for a new tenancy. The government has consulted on raising this to C by 2030, though the precise timeline remains subject to confirmation.
• Smoke and carbon monoxide alarms: A working smoke alarm is required on every floor. A carbon monoxide alarm is required in any room containing a fixed combustion appliance, including gas boilers.
• Legionella: You are required to carry out a risk assessment for Legionella bacteria in the water system. In most standard residential properties, a written self-assessment is sufficient, but you must be able to demonstrate you have done it.

Preventative vs. Reactive Maintenance

Most landlords manage maintenance reactively: something breaks, a tenant reports it, it gets fixed. That approach is understandable, but it is consistently more expensive than a preventative routine. Industry data suggests that proactive maintenance can cut emergency repair costs by around 32% over time (NRLA, 2024).

The principle is simple: small problems found early are cheaper than large problems found late. A failing seal around a bath costs almost nothing to replace. Left for twelve months, the water damage behind the tiles can run to thousands of pounds.

A basic annual maintenance schedule for a South London rental property might look like this:

Every Year

• Gas safety inspection and certificate renewal
• Boiler service (often combined with the gas safety check)
• Gutter clearance, particularly important in autumn given the volume of street trees across much of South London
• Check roof condition, flashings, and any flat roof sections for standing water or membrane deterioration
• Test all smoke and carbon monoxide alarms; replace batteries and units as needed

Every Two to Three Years

• Inspect sealant around baths, showers, and kitchen worktops
• Check condition of external paintwork, window frames, and door seals
• Review condition of white goods supplied with the property

Every Five Years

• EICR fixed wiring inspection
• Review and repaint communal areas if the property is part of a larger building

At Every Tenancy Change

• Full inventory check against the original schedule of condition
• Inspect for wear and damage beyond fair wear and tear
• Address any minor repairs before the next tenant moves in — a property in good condition lets faster and to better tenants

Budgeting for Maintenance

There is no universally correct maintenance budget, but a working rule for UK landlords is to set aside 1% of the property’s value per year for maintenance and repairs. On a £400,000 flat in South London, that is £4,000 annually. For older properties or those with more complex systems, 1.5% is more realistic.

Labour costs in London are consistently higher than the national average, and skilled trades remain in short supply across the capital. Factor this into your budget rather than assuming you can get the same rates as a landlord in the Midlands or the North.

Some landlords prefer to hold a reserve fund rather than budget by percentage: a pot of £3,000 to £5,000 that can absorb an emergency boiler replacement or an unexpected plumbing failure without disrupting cash flow. Either approach works; the key is that the money exists before the problem arises.

Emergency Repairs: What Counts and What to Do

Some repairs cannot wait. The following should be treated as emergencies requiring same-day or next-day action:

• Total loss of heating or hot water during cold weather
• Significant water leak or burst pipe
• Electrical fault posing a safety risk
• Structural damage affecting security (a broken external door or window, for example)
• Gas leak: the tenant should call the National Gas Emergency Service on 0800 111 999 immediately, and you should arrange for a Gas Safe engineer to attend before the supply is restored

For non-emergency repairs, you are expected to respond within a reasonable timeframe. There is no single statutory definition of “reasonable” for most repairs, but 14 to 28 days is the accepted working standard for non-urgent issues. Leaving a repair unaddressed for months, even a minor one, weakens your position considerably if a dispute arises.

Using a Managing Agent

If you own multiple properties, work full-time, or are based outside London, managing maintenance yourself becomes increasingly difficult. A managing agent handles tenant communication, contractor relationships, and compliance tracking on your behalf, typically for a fee of 10% to 15% of the monthly rent.

For South London landlords with busy portfolios, this is often the most cost-effective arrangement: a good agent will catch small problems before they escalate, maintain contractor relationships that bring better pricing, and ensure your compliance certificates are renewed on time. The cost of an agent is almost always less than the cost of a single missed repair that becomes a legal dispute.

Keeping Records

Whatever your maintenance approach, document everything. Keep copies of all safety certificates, contractor invoices, inspection reports, and any written communication with tenants about repairs. If a dispute ends up before a tribunal or the courts, your paper trail is your defence. Tenants now have stronger rights under the Renters’ Rights Act 2025, and the burden on landlords to demonstrate compliance is greater than it has ever been.

A simple folder system, physical or digital, organised by property and year, is sufficient. What matters is that you can produce any document quickly when asked.

If you’re a landlord in South London looking for support with property management or want to understand how Credential can help you stay compliant and protect your investment, speak to our team. Whether you manage one property or a growing portfolio, we’re well placed to help.

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