Friday, 11 September 2026. A London flat can look like a perfectly sensible rental investment on paper. The purchase price is known, comparable rents are easy to find and the expected gross yield can be calculated in a few minutes. What that calculation often fails to show is everything happening elsewhere in the building.
For landlords buying leasehold flats, the economics of the investment do not stop at the front door. Service charges, major works, building insurance, reserve funds and restrictions contained in the lease can all influence whether a property that appears profitable actually performs as expected.
This is particularly relevant in London, where flats make up a substantial part of the rental market and many modern developments offer facilities that are attractive to tenants but expensive to operate.
Why service charges deserve more attention
Service charges normally contribute towards the cost of maintaining and operating the wider building. Depending on the development, this can include cleaning communal areas, maintaining lifts, landscaping, security, concierge services and building insurance.
These costs are not necessarily fixed. A service charge can change as the actual cost of maintaining the development changes.
That means a landlord comparing two apartments with similar rents should not assume they offer similar returns.
Consider a modern development with a residents' gym, several lifts, landscaped communal areas, 24-hour concierge and extensive shared facilities. Those features may help the apartment attract tenants, but somebody has to pay to operate them.
The investment question is therefore not simply whether tenants like the facilities. It is whether the additional rent they help the property achieve is sufficient to justify the landlord's share of maintaining them.
Major works can change the calculation unexpectedly
Routine service charges are only part of the issue.
Leaseholders can also face contributions towards significant works to the building. Roof repairs, external decoration, lift replacement and other substantial projects can create costs that are very different from normal monthly expenditure.
There are legal protections around certain major works. Where a leaseholder would be required to contribute more than £250 towards qualifying planned works, the landlord or freeholder will normally have to follow the statutory Section 20 consultation process. Different rules apply to qualifying long-term agreements where the contribution exceeds £100 per year.
For a property investor, this makes information about planned works extremely important before purchase.
A flat producing a healthy monthly rental surplus can look considerably less attractive if the owner receives a substantial major-works demand shortly afterwards.
Can you actually rent the flat out?
This sounds like an obvious question, but ownership of a leasehold flat does not automatically mean unrestricted freedom to sublet it.
The lease determines what the leaseholder is permitted to do. Some leases permit ordinary residential subletting, some require the freeholder's consent and others contain more restrictive provisions. Mortgage and insurance conditions may create additional requirements. London City Hall's leasehold guidance specifically advises leaseholders to check the lease, mortgage arrangements and insurance before subletting.
This becomes even more important where an investor is considering something other than a conventional residential letting.
A landlord planning short-term accommodation, corporate letting or another management model should establish whether that particular use is permitted rather than assuming that permission to rent automatically covers every form of occupation.
The building itself affects tenant experience
There is another side to service charges that investors sometimes overlook.
Tenants may never see the service-charge statement, but they experience what it pays for.
They notice whether the lift works. They notice whether communal areas are clean. They notice broken entrance doors, parcel-management problems and poor security.
A well-managed building can therefore support the attractiveness of an individual apartment. Equally, an excellent landlord has limited control over the tenant experience outside the flat if the wider development is poorly managed.
This makes the quality of the building management part of investment due diligence.
What should an investor understand before purchasing?
A prospective landlord should read the lease rather than treating it as something for the solicitor to worry about quietly in the background.
Recent service-charge accounts can help show how costs have developed. Information about reserve or sinking funds can provide context about how future expenditure may be handled. Planned major works should be investigated, and restrictions affecting subletting need to be understood before the rental strategy is decided.
The purpose is not to avoid leasehold property. Many London landlords successfully operate leasehold rental homes.
The purpose is to calculate the investment using the real cost of owning the property, rather than just the cost of buying it.
A beautiful apartment can be a good rental investment.
A beautiful apartment with an expensive building attached to it may be a very different proposition.
*DISCLAIMER- THIS PHOTO HAS BEEN TAKEN FROM PINTEREST (HAUSHELPERS PROPERTIES, LLC)*