Funding A Lease Extension Before You Remortgage

A bridging loan is the standard way to finance a lease extension on a short lease because it lets you pay the freeholder's premium and legal costs before the lease is actually extended, at which point mainstream mortgage lenders will lend against the property again. This is a genuine chicken-and-egg problem in leasehold property, and a bridging loan for a lease extension short lease is built precisely to solve it. Once the extension completes and the lease term is restored, you refinance onto a normal mortgage or sell with a clean title, and that transaction repays the bridge.

We deal with this scenario often enough that it has become one of the more predictable bridging cases in the market. A leaseholder finds their flat has, say, 68 years remaining. Their existing lender won't touch a remortgage. A buyer's lender won't touch a purchase. The property is technically fine, saleable, mortgageable in every other sense, but the lease term itself has become the obstacle. The fix isn't complicated once you understand it, but almost nobody arrives at our door already knowing how the numbers work.

It's worth saying at the outset that this isn't a niche corner of bridging. Short leases are common across London and the major cities in particular, where flats built in the 1960s, 70s and 80s on long ground leases are now working through the back half of their terms. A huge number of ordinary leaseholders, not investors, not developers, just people who bought a flat to live in years ago, find themselves facing this exact problem at the point they come to sell or remortgage. The bridging solution exists because the underlying legal and valuation mechanics of lease extensions are well established, which makes lenders comfortable enough to fund them at reasonable pricing.

What this means in practice

In practice, financing a lease extension with a bridging loan means borrowing against the current, unextended value of the flat to fund the premium and costs, then repaying that borrowing once the extended lease unlocks a normal mortgage or a sale at full value.

The premium itself is what you pay the freeholder for the extra years, calculated using a formula that accounts for ground rent, the length remaining, and marriage value if the lease is under 80 years. On top of the premium there are your solicitor's fees, the freeholder's solicitor's fees (which you usually pay), a valuer's fee for the section 42 notice, and sometimes a share of the freeholder's valuation costs too. All of that needs to be funded before the extension is legally completed.

To put some real figures on this, a typical one-bedroom flat in an outer London borough worth around £280,000 with 72 years remaining might see a premium of somewhere between £12,000 and £18,000, depending on ground rent terms and the freeholder's stance. Add another £2,500 to £4,000 in combined legal and valuation costs across both sides, and the total funding requirement often lands somewhere between £15,000 and £22,000. Outside London, in a town like Peterborough or Preston, the same exercise on a flat worth £140,000 might produce a premium closer to £6,000 to £9,000, with total costs of £9,000 to £12,000. The principle scales with property value, but the mechanics stay identical.

The reason mainstream lenders step back from short leases is straightforward risk management. A lease with under 80 years remaining, and especially under 70, drops in value disproportionately to the years lost, because marriage value kicks in and the flat becomes harder to sell to a cash-strapped buyer needing a mortgage themselves. Most high street lenders set a minimum lease term at completion, commonly 70 years after the mortgage term ends, sometimes higher. A 68-year lease with a 25-year mortgage term simply fails that test outright, regardless of the applicant's income or credit history.

It's worth being clear on why lenders apply this rule so rigidly rather than assessing each case on its merits. Mortgage lenders sell their loan books, package them into securitised products, and rely on standardised criteria across thousands of properties. A lease that might comfortably see out a 25-year term today becomes a genuine problem 15 or 20 years into that mortgage, when the remaining term could be down to single figures and the property becomes very hard to sell. Lenders build in that buffer precisely because they're thinking about the whole term, not just the moment of completion.

This is where a bridging loan for a lease extension short lease situation earns its keep. The lender looks past the current unmortgageable state of the flat and lends against what it's worth today on an open market, unextended basis, sized to cover the premium and fees, with the clear expectation that the exit is a remortgage or sale once the extension is registered.

How it works

The mechanics run in a fairly fixed order: instruct a solicitor to serve the section 42 notice, get the flat valued for the premium calculation, agree the bridging loan against current value, complete the extension, then refinance or sell.

Step one is serving the statutory notice under the Leasehold Reform, Housing and Urban Development Act 1993, assuming you qualify (you generally need to have owned the flat for two years). This starts the clock and gives the freeholder two months to respond with a counter-notice. Many freeholders negotiate the premium during this window, and it's rarely a quick process, so timescales matter more here than in most bridging cases.

It helps to understand what actually happens during that two-month window, because a lot of leaseholders assume nothing is happening and get anxious. The freeholder's surveyor reviews the leaseholder's premium calculation, checks the ground rent review pattern, and usually comes back with a counter-offer somewhere above the initial figure. This is a completely normal part of the process rather than a sign anything has gone wrong. Most cases settle within a few thousand pounds of the original valuation, and a good specialist solicitor will have a realistic sense of where the number will land before negotiations even start.

Once the section 42 process is under way, you approach a bridging lender. They will want a valuation on the current lease term (to establish security value) and, in most cases, a projected value on the extended lease term too, since that tells them how much equity will exist once the deal completes and therefore how safe their exit is. The loan is typically sized against the current unextended value, at loan-to-value ratios of 65% to 75% depending on the lender and the location.

Funds are drawn to pay the premium and associated legal costs. The extension is registered at the Land Registry once the deal with the freeholder is complete, which itself can take a few weeks. Only then does the flat's true, extended-lease value exist on paper, and only then can you approach a mainstream lender for a normal remortgage, or put the flat on the market at its full extended-lease value.

Interest on the bridge is usually rolled up rather than paid monthly, since there's no income being generated by the property extension itself, and this keeps affordability testing simple. Arrangement fees typically run 1.5% to 2% of the loan, plus valuation and legal costs on both sides. None of this is cheap in absolute terms, but set against the alternative, being unable to extend at all and watching the lease term (and the flat's value) erode further each year, it's usually the sensible route.

To give a sense of the actual cost of borrowing, on a £16,000 bridging loan taken over a five-month term at a typical rate of 0.75% to 0.95% per month rolled up, the total interest usually falls somewhere between £600 and £760, with an arrangement fee of around £240 to £320 on top. Set against a premium that could easily rise by several thousand pounds if the leaseholder waits another year and drops under a key threshold, or against the alternative of being unable to sell at all, that finance cost is genuinely modest in the context of the wider transaction.

Typical scenarios

The scenario below is illustrative — a composite example reflecting the shape of deals of this kind, not a specific, identifiable transaction. Consider a landlord in Colchester who owns a one-bedroom flat let out to a long-standing tenant, currently valued at £165,000 with 71 years remaining on the lease. She wants to extend before it drops under 70 years and starts hitting stricter mortgage criteria at her next remortgage point.

The freeholder's premium, agreed after some negotiation through her solicitor, comes to £9,400, with legal and valuation costs across both sides adding a further £2,600, bringing the total funding requirement to £12,000. She arranges a bridging loan of £14,000 against the flat's current unextended value, a modest loan-to-value of around 8.5%, reflecting that she only needs to cover the premium and costs rather than refinance the whole property.

The loan is arranged over a six-month term at a rate of 0.85% per month, rolled up rather than serviced monthly. The section 42 process, freeholder negotiation and Land Registry completion take just under four months from notice to registration, which is fairly typical rather than fast. Once the extension is registered, taking the lease to 161 years, her flat's value rises to an estimated £182,000, and she remortgages onto a five-year fixed buy-to-let product, using part of the proceeds to clear the bridge in full alongside the accrued interest. The uplift in value covers the finance cost several times over, which is the arithmetic that makes this route worthwhile in the first place.

It's worth breaking down what actually happens to her numbers across the whole transaction, because this is the calculation every leaseholder in this position should run before committing. Her total finance cost, including arrangement fee, rolled-up interest across roughly four months, and her solicitor's fee for handling the bridge itself, comes to around £950. Against that, the uplift in value from extending the lease is £17,000, and she avoids the far steeper premium she'd have faced had she waited another 18 months and dropped below 70 years, at which point stricter lending criteria would likely have forced her into a bridging loan anyway, just at a higher premium cost. The finance charge represents a small fraction of the value created, which is exactly the shape of deal that makes sense for this type of borrowing.

A second, slightly different scenario is worth setting out too, since not every case is a straightforward buy-to-let remortgage. Take an owner-occupier in Woking with a two-bedroom flat worth £310,000 and 63 years remaining, well under the more comfortable thresholds. He's not looking to sell or remortgage immediately, but his existing lender has flagged the lease at his next product transfer point, roughly 14 months away, and warned him informally that a further advance or transfer won't be possible without action. His premium, given the shorter starting term and marriage value now firmly in play, comes out at £34,000, with combined legal and valuation costs of £4,800. He arranges a bridging loan of £42,000, giving some headroom above the immediate costs, over a nine-month term to allow for a slower freeholder response. His freeholder is a corporate entity managing several blocks and takes closer to five months to agree terms, pushing the whole process nearer the upper end of what he budgeted. He completes just in time for his product transfer, refinancing onto a new five-year fixed rate at a mainstream lender, with the extended lease now standing at 153 years.

What lenders look for

Bridging lenders assessing a lease extension case look primarily at current security value, a clear route to an extended valuation, and evidence the section 42 process is genuinely under way rather than just being discussed.

Loan-to-value ranges for this type of deal typically sit between 65% and 75% of current unextended value, though because the amount needed is often modest relative to the property's worth, many deals complete at well below the maximum LTV a lender would otherwise offer, which strengthens the application considerably. Lenders like seeing headroom.

Timescales from enquiry to funds released usually run three to five weeks for straightforward cases, longer if title issues or leasehold structure complications surface during the legal work. That's a realistic figure and borrowers who expect it in a week are usually disappointed, since solicitors on both sides need to review the lease, the freeholder's identity needs confirming (sometimes freeholders are hard to trace or are corporate entities requiring extra diligence), and the valuer needs to produce both a current and projected extended valuation.

Acceptable security is almost always the flat itself, sometimes supplemented by a second charge over another property if the loan-to-value on the flat alone doesn't quite work. Lenders want to see the section 42 notice already served, or at minimum a signed instruction to a solicitor to serve it, plus the valuer's premium calculation. Evidence of exit matters hugely: a mortgage agreement in principle for the post-extension remortgage, or, if the plan is to sell, comparable evidence of what extended-lease flats in the same building or area actually achieve.

The most common reason these applications get declined isn't affordability, it's an unclear or contested freeholder negotiation. If the freeholder is disputing the premium calculation or has gone quiet, lenders get nervous about timescale risk, because a stalled extension means a stalled exit. Getting the premium broadly agreed, even informally, before applying makes underwriting significantly smoother.

Lenders also pay close attention to who the freeholder actually is. A large, professional freeholder or managing agent with a track record of processing section 42 extensions tends to reassure underwriters, since the timeline is more predictable and precedent from other flats in the same block often exists. A private individual freeholder, or worse, an absent or unresponsive one, adds risk, and some lenders will price for that or ask for a longer initial term to build in a safety margin. If your freeholder has a reputation for slow responses, it's worth flagging this to your broker early so the loan term reflects reality rather than a best-case assumption.

Credit history and income still matter, though less than in a standard mortgage application, since the lending decision rests primarily on the security and the exit rather than serviceability. That said, most bridging lenders will still want to understand your background exit route in more depth if you're planning to remortgage, including a broad sense of your income and existing borrowing, because a remortgage that later falls through leaves the lender exposed. A clear, credible backup plan, whether that's a second potential purchaser or a fallback lender for the remortgage, strengthens any application considerably.

Common mistakes

The most damaging mistake is waiting until the lease drops under 80 years before acting, because that single threshold triggers marriage value and can add thousands to the premium overnight.

Marriage value is the increase in the combined value of the freehold and the extended lease compared with the freehold and the unextended lease, and legally the leaseholder must share 50% of that uplift with the freeholder once the lease has fewer than 80 years remaining. Above 80 years, marriage value doesn't apply at all, so extending at 81 or 82 years is often dramatically cheaper than waiting until 78 or 79. Leaseholders who put off the decision by even a year or two around this threshold frequently pay several thousand pounds more than they needed to.

To illustrate just how sharp this cliff edge can be, a flat worth £250,000 with 82 years remaining might see a premium of around £6,000 to £8,000 to extend. The same flat, two years later with 80 years remaining, might see that premium jump to £11,000 to £14,000, purely because marriage value has entered the calculation. Leaseholders who understand this in advance can time their section 42 notice to land comfortably above the threshold and save themselves a meaningful sum for very little extra effort.

A second common mistake is applying for short-term property finance before instructing a solicitor to serve the section 42 notice. Lenders want to see the process started, and turning up with only an idea and no notice served slows underwriting and sometimes results in a decline pending progress. Get the legal process moving first, then approach the lender in parallel.

Underestimating total costs is another frequent trap. Borrowers often budget for the premium alone and forget the freeholder's legal and valuation costs, their own solicitor's fees, and the bridging lender's arrangement fee, valuation fee and exit fee if one applies. A buffer of 10% to 15% above the estimated premium is sensible when sizing the loan.

A further mistake worth flagging is choosing a solicitor purely on price rather than experience with lease extensions specifically. This is a specialist area of conveyancing, and a solicitor who handles it regularly will know how to negotiate the premium efficiently, spot unusual clauses in the existing lease that might complicate matters, and keep the statutory timetable on track. A generalist solicitor taking on their first or second lease extension case can add weeks to the process through simple unfamiliarity, and those weeks translate directly into extra bridging interest.

Finally, some leaseholders assume they can remortgage the day the extension completes. In reality, most mainstream lenders want to see the extended lease registered at the Land Registry with title updated before they'll lend, which adds a further few weeks after the freeholder agreement is signed. Building that lag into the bridging loan term avoids a scramble at the end.

Alternatives or comparisons

A bridging loan is not the right choice for every lease extension, and the honest view is that if you have the cash sitting in savings to cover the premium and costs outright, using your own funds is almost always cheaper and simpler than borrowing.

If the lease still has well over 80 years remaining and there's no urgency, it may make more sense to save toward the premium over time rather than pay bridging interest at all, particularly since marriage value isn't yet a factor and the cost pressure to act quickly is lower. Similarly, if you're not planning to sell or remortgage within the next twelve to eighteen months, the ongoing interest on a bridge can erode the financial benefit of extending in the first place.

Some leaseholders explore a second charge mortgage against another property they own outright, which can sometimes undercut bridging rates if the term is likely to run longer than a year, though qualifying criteria are stricter and speed is usually slower. Personal loans are occasionally used for smaller premiums, typically under £15,000, where the simplicity of an unsecured product outweighs the marginally higher rate.

It's worth weighing these options against each other on cost as well as speed. A second charge mortgage might carry an interest rate lower than a bridge on paper, but the application process typically takes six to ten weeks rather than three to five, and most second charge lenders still want reassurance around affordability and existing debt, which a straightforward bridge secured on the flat itself doesn't always require. For a leaseholder racing a tight deadline, perhaps a sale already agreed subject to the extension completing, that speed difference alone often settles the decision in favour of bridging, even at a marginally higher headline rate.

Where the property is unlettable or in poor condition alongside the short lease, and the real plan is a full refurbishment and resale rather than a straightforward extension, a broader developer finance package covering both the lease extension and the works is usually a better structure than a bridge sized for the premium alone. Landlords further along in a wider portfolio strategy sometimes fold the lease extension cost into a larger refinance across several properties, which can improve overall pricing. The general rule: bridging loans suit situations with urgency, a clear near-term exit, and a funding gap that genuinely can't be closed any other way. If none of those apply, look elsewhere first.

There's also the informal collective route worth mentioning, where several leaseholders in the same block extend at the same time, sometimes alongside a collective freehold purchase under the same 1993 Act. This can reduce per-flat legal costs since some of the freeholder negotiation and valuation work is shared, though it introduces its own complexity around coordinating multiple owners and their individual finance arrangements. Where a block-wide extension or enfranchisement is realistically on the table, it's worth exploring before committing to an individual bridging loan, since the numbers can work out meaningfully better for everyone involved.

How to get the best outcome

The best outcome comes from sequencing the legal and financial steps correctly and choosing a lender experienced specifically in leasehold extension cases rather than general bridging.

Start the section 42 notice process before or alongside your bridging enquiry, and instruct a solicitor who has handled lease extensions before, since generalist conveyancers sometimes miss deadlines within the statutory timetable that can delay the whole chain. Get an independent premium valuation early too, rather than relying solely on the freeholder's figure, because negotiating from an informed position often reduces the final premium meaningfully.

When you're ready to arrange your bridging loan, bring the section 42 notice, the premium valuation, evidence of the current lease term, and, if you have it, an agreement in principle for the post-extension remortgage. That last item in particular speeds up underwriting because it demonstrates the exit is already lined up rather than theoretical.

It's also worth reading up on current market pricing before you commit, since bridging rates move with the wider lending environment; the current UK bridging loan rates guide is useful background, and understanding current SME funding costs across the market gives useful context on where pricing sits generally. If you're new to the product entirely, our piece on what bridging loans are and how they work is a good starting point, and it pairs well with our guide on what happens when a short lease flat mortgage gets refused, since that's usually the moment this whole process starts.

A few practical steps worth taking before you even speak to a broker can save real time later. Order copies of your lease and the freehold title from the Land Registry yourself, since these are cheap and quick to obtain and your solicitor will need them anyway. Check whether your building has an existing managing agent who has handled extensions in the block before, since they'll often be able to tell you roughly what recent premiums have settled at for comparable flats, giving you a useful sanity check against your own valuer's figure. And speak to your existing mortgage lender, if you have one, about their view of the lease term now, since some will confirm in writing what minimum term they need at your next renewal point, which helps you set a realistic deadline for the whole process.

Landlords managing several leasehold properties across a portfolio, whether in Dorking, Gosport, Canary Wharf or elsewhere, tend to get the smoothest outcomes by extending leases proactively before the 80-year threshold rather than reacting once a tenant or buyer forces the issue. Reviewing lease terms annually as part of a wider portfolio health check catches problems years before they become urgent and expensive.

It's also worth thinking about timing relative to the wider bridging market rather than just your own lease term. Rates and lender appetite for this type of deal shift over time, and applying when a lender has recently tightened its leasehold criteria, perhaps after a run of complex or delayed cases, can mean a slower or more expensive process than applying six months earlier or later. A broker who places these deals regularly will usually have a good sense of which lenders currently have the strongest appetite for lease extension bridges, which can meaningfully affect both your rate and your timeline.

Summary

Financing a lease extension on a short lease is one of the cleanest use cases for a bridging loan in the whole property finance market: a temporary, well-understood funding gap with a predictable exit once the extension registers. The key numbers to get right are the premium (and whether marriage value applies), total costs including both sets of legal fees, and a realistic timescale that accounts for the section 42 process rather than assuming instant completion. Comparing bridging loan lenders across the UK market before committing is sensible, since pricing and appetite for leasehold cases varies more between lenders than borrowers expect. For a wider view of how this fits alongside other options, our UK commercial funding solutions hub covers the full range of property and business finance products available.

If you're weighing up whether a short lease extension makes financial sense before you commit to anything, it's worth taking advice on the numbers first. You can get a bridging loan quote and have someone run the premium, costs and exit route past you before you serve any notices.