A London flat comes with a building, and the building comes with a bill. The service charge pays for everything the owners share; the ground rent is a historic payment to the freeholder; and since 2022 a new regime governs the safety of taller blocks, with costs that fall on some owners and not others. Gulf buyers know Dubai’s service charges, where the amounts are often lower; in London a low charge can be the worst news of all.
Owning and letting
Service charges, ground rent and building safety: what the owner of a London flat pays and why
What a London flat service charge covers
The service charge pays for the insurance, common parts, lift, porter, managing agent and reserve fund, and the owner pays it whether or not the flat is let. Expect 3 to 5 pounds per square foot a year in a plain conversion, 6 to 9 in a portered mansion block and 9 to 14 in a new tower: on a 900 square foot flat, 2,700 to 12,600 pounds a year. The catch: a low charge may mean an empty reserve and a large bill coming.
Buildings insurance for the whole block, cleaning and lighting of the common parts, the lift contract, the porter or concierge, gardens, gas and electricity for shared areas, the managing agent’s fee, accountancy, fire-safety checks and equipment, and a contribution to the reserve fund for future works. In a modern tower add the gym, the pool, the twenty-four-hour concierge and the plant that keeps them running.
What the lease allows landlords to charge for service charges
The lease sets out what may be charged and in what shares, and the charge is only recoverable if it is reasonable and the work was reasonably done. The owner pays whether or not the flat is let, and a tenant’s rent is set knowing the landlord bears it.
Typical service charge per square foot for London flats
Per square foot per year is the measure. A plain period conversion with no lift runs at 3 to 5 pounds; a mansion block with a porter at 6 to 9; a new tower with amenities at 9 to 14, with the best-known schemes above that. On a 900 square foot flat that is a range from 2,700 to 12,600 pounds a year, and the difference comes straight off the rent, which is why a tower’s higher headline yield often nets down to a mansion block’s. A charge that is low for its type is not always good news: it may mean an empty reserve and a large bill coming.
Why the reserve fund matters when buying a flat
A well-run block collects money every year into a reserve, so that a new roof or a lift replacement is paid from savings rather than by a sudden demand. The reserve belongs to the building, not to the owner who paid it, so a seller does not get it back and a buyer inherits it. A block with a healthy reserve and a plan for the next ten years is the one to buy; a block with no reserve and a forty-year-old lift is a bill waiting for the next owner.
Major works and section 20 consultation for flat owners
Where works will cost any one owner more than 250 pounds, the landlord must consult the owners under section 20 of the Landlord and Tenant Act 1985: a notice of intention, estimates, and a chance to comment, over several months. A buyer should ask whether any section 20 notice has been served or is planned, because the cost of works that were consulted on before completion can still land on the buyer. The seller’s answer goes into the contract, and a known liability is a reason to renegotiate.
What ground rent is and what leases charge
Ground rent is a payment to the freeholder for nothing in particular, a relic of the leasehold system. Leases granted since 30 June 2022 may charge only a peppercorn, so a new-build flat has none. Older leases charge anything from a few pounds to several hundred a year, and some, written in the 2000s, double every ten or fifteen years, which lenders refuse and buyers should too.
The 2024 leasehold reform Act and what is still pending
The Leasehold and Freehold Reform Act 2024 made lease extensions longer, 990 years, removed the two-year ownership wait from January 2025, and set out to make extensions cheaper by abolishing marriage value, though the valuation changes still await regulations. A government consultation on capping existing ground rents has not yet produced law. Our guide on leasehold and freehold covers lease length, which matters more than ground rent.
Building safety rules and cladding costs for flat owners
The Building Safety Act 2022 followed the Grenfell fire. For blocks over 11 metres, roughly five storeys, it limits what owners can be charged for removing dangerous cladding and other historical safety defects, with most of the cost pushed onto developers and freeholders, and protects owners whose lease qualifies. Blocks over 18 metres are registered with the Building Safety Regulator and carry an accountable person and a safety case.
What a buyer should check on building safety
For a buyer the practical points are three: whether the block has an external wall assessment, whether any remediation is complete, funded or merely planned, and whether the seller’s lease is a qualifying lease so that the protections pass to the buyer. The seller must give a landlord’s certificate and a leaseholder deed of certificate; a solicitor who does not ask for them is not doing the job.
Five documents to read before buying a London flat
The documents that tell you whether a block is well run:
- Service-charge accounts: Three years of service-charge accounts, to see the trend and the arrears.
- Budget and reserve: The current year’s budget and the reserve-fund balance.
- Section 20 notices: Any section 20 notice served in the last two years, and the ten-year maintenance plan if there is one.
- Insurance schedule: The buildings insurance schedule, with the sum insured and the excess.
- Building safety papers: For a block over 11 metres, the external wall form, the landlord’s certificate and the fire risk assessment.
These arrive in the managing agent’s pack, which our due-diligence guide describes. We read them for every purchase and the findings go into the offer, the price, or the decision to walk away.
Related guides: A London second home used in summer and Houses or flats.
Sources: Building Safety Act 2022 (legislation.gov.uk) · Leasehold and Freehold Reform Act 2024 (legislation.gov.uk) · Leasehold property (GOV.UK). Service-charge figures are indicative London ranges for that date; the leasehold reforms are being brought into force in stages and the position should be checked with the solicitor on the day. General information, not legal advice. Figures verified 14 October 2026.
Frequently Asked
Questions about service charges and building safety
£3,000 to £8,000 a year in a stucco conversion, £8,000 to £20,000 in a portered mansion block, £12 to £18 per square foot in a new scheme; above that, ask why.
It caps and in many cases removes the leaseholder’s share of cladding remediation costs in buildings over 11 metres, provided the lease qualifies; the building’s safety status should be confirmed in writing before exchange.
On existing leases, as the lease provides; new leases since June 2022 carry no ground rent, and the 2024 Act allows an extension at a peppercorn rent.
A plain period conversion with no lift runs at 3 to 5 pounds per square foot a year, a mansion block with a porter at 6 to 9, and a new tower with amenities at 9 to 14, with the best-known schemes above that. On a 900 square foot flat that is 2,700 to 12,600 pounds a year, and the difference comes straight off the rent.
Yes. The owner pays whether or not the flat is let, and a tenant’s rent is set knowing the landlord bears it. The charge is only recoverable if it is reasonable and the work was reasonably done, and the lease sets out what may be charged and in what shares.
Where works will cost any one owner more than 250 pounds, the landlord must consult the owners under section 20 of the Landlord and Tenant Act 1985: a notice of intention, estimates and a chance to comment, over several months. Ask whether one has been served or is planned, because the cost of works consulted on before completion can still land on the buyer.
No. The reserve belongs to the building, not to the owner who paid it, so a seller does not get it back and a buyer inherits it. A block with a healthy reserve and a ten-year plan is the one to buy; a block with no reserve and a forty-year-old lift is a bill waiting for the next owner.
Leases granted since 30 June 2022 may charge only a peppercorn, so a new-build flat has none. Older leases charge anything from a few pounds to several hundred a year, and some written in the 2000s double every ten or fifteen years, which lenders refuse and buyers should too. Lease length matters more than ground rent.
Blocks over 11 metres, roughly five storeys, where it limits what owners can be charged for removing dangerous cladding and other historical defects. Blocks over 18 metres are also registered with the Building Safety Regulator with an accountable person and a safety case. The seller must give a landlord’s certificate and a leaseholder deed of certificate.
It made lease extensions longer, at 990 years, removed the two-year ownership wait from January 2025, and set out to make extensions cheaper by abolishing marriage value, though the valuation changes still await regulations. A government consultation on capping existing ground rents has not yet produced law, and the reforms are being brought into force in stages.
