Around 5 million homes in England are leasehold and the vast majority are flats. If you're buying one, you're not just buying a property. You're buying into a legal relationship with a freeholder, a managing agent, and potentially dozens of other leaseholders in the same building. That relationship can be excellent, or it can be deeply problematic, and the difference almost always comes down to checks you either did or didn't do before you exchanged.
This guide covers the fourteen most important things to verify before committing to a leasehold flat purchase in the UK.
1. How many years are left on the lease?
This is the first number to find, and the most important. Lease length directly affects your ability to get a mortgage, the cost of extending the lease later, and how easy the property will be to sell. Most mortgage lenders require at least 70 - 85 years remaining at the end of the mortgage term, so on a 25-year mortgage, they'll often want at least 95 years remaining today.
In practice, anything under 80 years should trigger immediate scrutiny. When a lease drops below 80 years, extending it becomes significantly more expensive because of a concept called marriage value, where the leaseholder must pay the freeholder a share of the uplift in property value that the extension creates. Above 80 years, no marriage value applies, making extensions far cheaper.
If you don't plan to stay in the property permanently, the remaining lease term when you come to sell matters just as much as the term today. You might be comfortable buying with 90 years remaining, but if you sell in 15 years with 75 years left, your buyer will face mortgage difficulties and a higher extension bill. That feeds directly into the price you can achieve or whether you can sell at all. Factor in the full exit picture, not just your entry position.
999-year leases: Some modern leasehold flats, particularly new builds, come with 999-year leases. For practical purposes these are as close to freehold as a leasehold can get. Lease length is essentially not a concern with a 999-year term, and you can focus your due diligence elsewhere.
Watch out: Sellers sometimes quote the original lease length rather than what's remaining. A "150-year lease" granted in 1990 has only around 114 years left. Always ask for the remaining term from the lease document itself, not the estate agent's brochure.
2. What is the ground rent, and does it escalate?
Ground rent is an annual payment to the freeholder for the land the building sits on. Under the Leasehold Reform (Ground Rent) Act 2022, ground rent on new leases is capped at a peppercorn (effectively zero). But older leases can carry ground rent of hundreds or even thousands of pounds per year, with escalation clauses that double it every 10–25 years.
This matters enormously for two reasons. First, some lenders refuse to mortgage properties with doubling ground rent clauses. Second, a ground rent that doubles every decade can reach unaffordable levels within decades, making the flat extremely difficult to sell. Before making any offer, ask your solicitor to review the exact ground rent figure and escalation formula in the lease document.
Red flag: A £300 pa ground rent that doubles every 10 years becomes £9,600 pa after 50 years. Ground rents structured this way have rendered some flats effectively unsaleable. The government has banned this structure on new leases, but millions of existing leases still contain it.
3. What are the service charges, and what do they cover?
Service charges are your contribution to the cost of maintaining and running the building — lifts, communal cleaning, building insurance, landscaping, management fees, and major works. They range from a few hundred pounds a year for a simple low-rise to several thousand for a modern high-rise with a concierge. Always request three years of service charge accounts before making an offer.
Look specifically for:
- Whether charges are rising year-on-year, and what is driving the increase
- How the service charge is reviewed and increased each year, some track CPI, others are at the managing agent's discretion with no cap. Ask to see the methodology, not just the figure
- The balance of the sinking fund, the reserve set aside for major future works
- Any planned major works that could trigger a large one-off contribution bill
- Section 20 notices, the formal advance notice leaseholders must receive before major works costing more than £250 per leaseholder are undertaken
- Whether you have received or could receive an unestimated cost demand at the end of the financial year. Some managing agents issue year-end bills for costs not covered by the budget estimate, this is legal but catches many new buyers off guard
- Whether the management company's accounts are independently audited
As a rough rule of thumb, annual service charges on a well-run building in the UK typically range between 0.5% and 1% of the property's value. For example, a flat worth £400,000 paying £4,000 a year (1%) is considered normal and often aligns with the thresholds used by mortgage lenders to assess affordability. Charges significantly higher than 1% warrant close explanation, often due to premium amenities like a concierge, gym, or ongoing fire safety remediation. Conversely, charges significantly below this range can be a red flag for an under-maintained building that lacks a reserve fund, potentially leading to large, unexpected "Section 20" bills for major repairs in the future.
Also consider how the building's amenities affect your charges. A concierge, gym, swimming pool, and underground car park all cost money to run and maintain, and that cost is split among leaseholders. The more facilities a building offers, the higher the service charge is likely to be. Make sure you actually want and will use those amenities before treating them as a selling point.
While some recent campaigns have pushed for a "right to charge," there is currently no law in the UK that allows leaseholders to install an EV charger without freeholder consent. Under standard leasehold law, you must still obtain a Licence to Alter or written permission from the freeholder or management company, as the installation typically involves structural changes or cabling through communal areas. However, for new-build flats completed after June 2022, Building Regulations Part S mandates that charging infrastructure must be provided by default, and current residents of existing flats can still apply for the government's £350 EV chargepoint grant provided they have permission and a designated parking space.
Good to know: A sinking fund with no balance is a serious warning sign. Buildings require periodic major works such as roof replacement, lift overhaul, external redecoration, and window replacement. If there's no reserve, a large unexpected bill will fall directly on leaseholders shortly after you move in.
4. What happens when service charges or ground rent go unpaid?
This is something most buyers never think to ask, but it matters both for your own protection and for understanding the financial health of the building. When a leaseholder fails to pay service charges or ground rent, the freeholder or managing agent has legal tools to pursue the debt, including applying to the tribunal and, in serious cases, forfeiture of the lease. Forfeiture is rare and the courts apply it reluctantly, but it is a real consequence of persistent non-payment.
The more practical concern is what happens to the building when some leaseholders simply do not pay. If the building has a history of leaseholders in arrears, the sinking fund may be underfunded, maintenance may be delayed, and costs may be concentrated on the leaseholders who do pay. Before buying, ask the managing agent for the current level of service charge arrears across the building. A high arrears figure can indicate either financial distress among residents or a dispute with the freeholder or managing agent over the legitimacy of the charges being levied, both of which are warning signs.
Watch out: If there is an ongoing legal dispute between leaseholders and the freeholder over service charges, your mortgage lender may require details of it and could decline to lend. Ask the seller's solicitor specifically whether any such dispute exists before proceeding.
5. Who is the freeholder, and what is their track record?
The freeholder owns the building and the land it sits on. They set the overall structure of the service charge, appoint (or approve) the managing agent, and control major decisions about the building. Some freeholders are long-established institutional landlords with professional, fair management. Others are individual investors who have bought freeholds specifically to generate income from leaseholders through inflated service charges, permission fees, and onerous lease terms.
Search the freeholder's name and company number on Companies House. Look for First-tier Tribunal decisions involving them, as these are public record and will show whether they have a history of disputes with leaseholders. Search leasehold forums and social media for complaints. A difficult freeholder can make the building miserable to live in and very hard to sell.
It is also worth checking whether leaseholders have exercised their Right to Manage (RTM). This is a legal right that allows leaseholders to collectively take over the management of their building from the freeholder, without needing to buy the freehold outright. If an RTM company is already in place, the leaseholders are effectively running the building themselves. This is generally a positive sign, though the competence of the RTM company's directors still matters and is worth investigating.
Best case: A Residents' Management Company (RMC) where the leaseholders themselves collectively own the freehold and manage the building. This removes the commercial incentive to exploit leaseholders and typically results in transparent, fair service charges. Look for "SIC code 98000" on Companies House, which is the code for resident-managed buildings.
6. Does the building have an EWS1 certificate, and what is the rating?
The EWS1 (External Wall System) form is a fire safety assessment introduced after the Grenfell Tower fire for multi-storey residential buildings. Most lenders require one for flats in buildings over 18 metres, and many require it for lower-rise buildings with potentially combustible cladding or external materials.
The certificate existing is not enough — the specific rating is what matters for mortgage lending. An A1 or A2 rating (no or limited combustible materials) is accepted by all mainstream lenders. B1 (combustible materials but assessed as low risk) is accepted by most. A B2 rating (higher risk combustible materials) severely restricts your mortgage options, often to specialist lenders only, and can make the flat extremely difficult to resell to anyone who needs a mortgage.
Critical: Always obtain the specific EWS1 rating in writing from the managing agent before making an offer. An EWS1 certificate existing is not the same as an acceptable rating. A B2 rating can effectively lock you into owning a flat you cannot easily sell.
7. Is the building insurance adequate, and who arranges it?
In a leasehold flat, the freeholder or managing agent typically arranges buildings insurance for the entire block, and the cost is passed on to leaseholders via the service charge. You are responsible only for your own contents insurance. Before exchange, verify that buildings insurance is in place, who the insurer is, what the annual premium is, and crucially whether flood risk is covered and on what terms.
This matters particularly if the building is in a flood-risk area. Properties built after 1 January 2009 are excluded from Flood Re, the government-backed scheme that caps flood insurance premiums. If the building is post-2009 and in a flood-prone location, the block's buildings insurance may be placed in the specialist market at significantly elevated premiums, which feeds directly into your service charges.
8. Who is the managing agent, and are they competent?
The managing agent handles the day-to-day running of the building on behalf of the freeholder. Their quality varies enormously. A good managing agent keeps the building well-maintained, responds promptly to issues, manages the service charge fairly, and communicates clearly with leaseholders. A poor one does none of these things, and since they're appointed by the freeholder rather than the leaseholders, you have limited recourse if they're bad.
Before buying, search for the managing agent's name on Trustpilot and Google Reviews. Ask the seller directly about their experience. Look for any tribunal cases involving them. Check whether they are members of ARMA (Association of Residential Managing Agents) or RICS, as membership requires adherence to professional standards and gives you a complaints route.
If at all possible, speak to at least one existing resident in the building before exchanging. A five-minute conversation in the lobby or a knock on a neighbour's door will tell you more about the day-to-day reality of living there than any document you'll receive from the managing agent. Ask directly: are issues dealt with quickly? Do you feel the service charge is fair? Have there been any major problems in the last year?
9. What is it like to actually live there?
Buying a flat means buying into a shared building with people above, below, and beside you. The quality of that experience depends heavily on things no survey will tell you, how sound travels through the building, what the neighbours are like, whether the communal areas are kept clean, and how disputes between residents are handled when they arise.
Soundproofing varies enormously between buildings. Older purpose-built flats from the 1930s–1960s often have better structural sound insulation than many modern new builds, where lightweight construction methods can mean you hear everything from the flat above. If noise is a concern, visit the property at different times of day and on a weekend evening. Ask the seller directly whether noise from neighbours has ever been an issue.
Also consider the community dynamics. A building where most flats are owner-occupied tends to have higher standards of upkeep and a greater sense of shared responsibility than one with a high proportion of short-term rentals. Check the ratio of owner-occupiers to renters if you can, and ask whether the building has an active residents' association. Buildings where leaseholders are engaged and organised tend to be better managed and more responsive to problems than those where residents have no collective voice.
Good to know: If the building doesn't already have a residents' association, leaseholders have the right to form one and have it recognised by the freeholder. A recognised tenants' association has legal rights to be consulted on service charge matters and managing agent appointments.
10. Are there any planning or development risks nearby?
A leasehold flat purchase carries the same exposure to nearby development risk as any property, such as new tall buildings blocking views, commercial developments changing the character of the area, or infrastructure works that cause years of disruption. Check the local authority's planning portal for any applications within 250–500 metres of the building. Pay particular attention to applications that have been submitted but not yet decided, as these represent the highest risk since their outcome is uncertain.
11. What are the total annual costs, beyond your mortgage?
Leasehold ownership adds a layer of ongoing costs that freehold buyers simply don't face. Before finalising your budget, add up the full picture:
| Cost | Typical range | Notes |
|---|---|---|
| Ground rent | £0 – £500+ pa | Zero on new leases; verify escalation on older leases |
| Service charge | £1,000 – £5,000+ pa | Higher for newer, larger, or high-spec buildings |
| Council tax | £1,400 – £3,500+ pa | Verify exact band via Valuation Office Agency |
| Buildings insurance | Included in service charge | Check insurer and flood coverage terms |
| Contents insurance | £100 – £300 pa | Your own responsibility to arrange |
| Major works reserve | Variable | Can be thousands if sinking fund is depleted |
12. What does the lease say about alterations, subletting, and pets?
Leases vary considerably in what they permit leaseholders to do with their property. Some are highly restrictive, requiring freeholder consent (and a fee) for any internal alterations, prohibiting subletting, or banning pets entirely. Others are permissive. Read the key clauses in your lease before exchange, not after. Your solicitor should flag the major restrictions, but it's worth reading them yourself so you're not surprised six months after moving in.
Pay particular attention to short-term letting. Many leases, especially in older buildings, prohibit subletting entirely or require freeholder consent for any tenancy. Even where subletting is permitted, most leases prohibit using the property as a holiday let or listing it on platforms like Airbnb. This is because short-term lets bring a high turnover of strangers through communal areas, which other leaseholders and freeholders understandably want to control. If you intend to rent the property short-term at any point, check the lease restrictions carefully before buying.
13. Has the lease been extended or varied?
If the lease has previously been extended or the terms varied through a deed of variation, make sure your solicitor reviews these documents. They can sometimes introduce new terms, including new ground rent obligations or altered service charge structures, that weren't in the original lease. A clean lease history is one less thing to worry about; a complex one with multiple variations warrants careful legal review.
14. What is the Building Safety Act status?
The Building Safety Act 2022 introduced significant new obligations for buildings over 18 metres or 7 storeys. These buildings must be registered with the Building Safety Regulator and have a named accountable person responsible for building safety. If you're buying a flat in a high-rise, verify who the accountable person is and whether the building is registered. If the original developer has since gone into administration, this accountability chain may be unclear, which is a risk worth taking legal advice on before exchange.
The complete leasehold buyer's checklist
- Confirm exact years remaining on the lease from the lease document, not the estate agent — and model what that term will look like when you come to sell
- Review ground rent amount and escalation formula and flag any doubling clause to your solicitor
- Obtain three years of service charge accounts, check the sinking fund balance, and ask how charges are reviewed and increased each year
- Ask for any Section 20 notices, planned major works, and the current level of service charge arrears across the building
- Check whether there is any ongoing legal dispute between leaseholders and the freeholder
- Research the freeholder's identity and track record via Companies House and tribunal records — check if an RTM or RMC is in place
- Obtain the EWS1 certificate rating in writing: A1, A2, B1, or B2
- Confirm buildings insurance is in place, the insurer, and flood coverage terms
- Research the managing agent and check ARMA membership and online reviews
- Speak to at least one existing resident about their experience of the building and managing agent
- Visit the property at different times of day to assess noise and building character
- Check the local planning portal for nearby applications within 500 metres
- Verify the lease terms on alterations, subletting, pets, and short-term letting
- Confirm the accountable person under the Building Safety Act for buildings over 18m
- Verify council tax band via the Valuation Office Agency
- Confirm any allocated parking, storage, or demised areas are specified in the lease
Lease length reference: mortgage and resale impact
| Lease remaining | Mortgage availability | Extension cost | Action |
|---|---|---|---|
| 125+ years | All lenders | No urgency | Proceed normally |
| 90–124 years | All lenders | Moderate | Monitor, plan ahead |
| 80–89 years | Most lenders | Rising, act soon | Budget for extension within 5 years |
| 70–79 years | Some lenders decline | High (marriage value applies) | Negotiate price reduction or extension before purchase |
| Under 70 years | Very limited | Very high | Seek specialist legal advice, may not be viable |
The bottom line
Buying a leasehold flat is perfectly viable. Millions of people do it successfully every year, and many leasehold buildings are well-run, well-maintained, and excellent places to live. But the legal and financial complexity is genuinely greater than freehold, and the risks of skipping due diligence are serious. The checks in this guide are not optional extras. They're the minimum a prudent buyer should complete before exchanging contracts on any leasehold property in the UK.