The leasehold problem on your listing. It’s visible now. It’s a fall-through later.
Why a pre-instruction leasehold check is the cheapest way to protect your completion rate.
Kieran Slinger · Propalt · For estate agents
Leasehold is the most predictable deal-killer in UK property – and the most avoidable. Lease length, ground rent structure, service charge history: it's all on record, all readable before you take the instruction. Yet most of these problems don't surface until the mortgage valuation, four to six weeks in, when a fall-through costs everyone the most.
The agent who reads that risk at instruction is the one whose sales complete. Not just better service – a measurable difference: fewer fall-throughs, faster completions, a vendor who trusts you.
The leasehold flags that derail sales
Not all leasehold properties are equally problematic. The flags that consistently create mortgage problems are identifiable from publicly available data before a sale is agreed.
Lease length is the primary one. A lease with fewer than 70 years remaining will face high-street lender restrictions. Below 65 years, the pool of eligible mortgage products narrows dramatically. Below 60 years, it is effectively unmortgageable for most buyers without an extension that can take six to nine months to complete through the formal statutory process.
Ground rent structure is the second. Doubling ground rent clauses – where the ground rent doubles every 10 or 25 years – have been flagged by lenders as a material risk since 2017 and are now governed by the Leasehold Reform (Ground Rent) Act 2022. A property with a doubling clause on an old lease may be unmortgageable with multiple lenders.
| Leasehold risk assessment: 2-bed flat, E1 | Detail | Risk level |
|---|---|---|
| Lease length remaining | 64 years | HIGH – mortgage eligibility issue |
| Ground rent (current) | £250 per year | Moderate |
| Ground rent structure | Doubles every 25 years | HIGH – lender flag |
| Service charge (last year) | £3,400 | Review recommended |
| Lease extension: statutory route | Eligible – est. cost £14,000–£18,000 | Advise vendor |
That assessment at instruction tells the agent – and the vendor – that the property has two material leasehold issues that will be flagged at mortgage valuation. The buyer's lender will either decline the mortgage or require a significant price reduction to reflect the lease position. That conversation is far better had at week one than at week eight.
The pre-instruction leasehold check as standard practice
The agents who consistently avoid leasehold-related fall-throughs are the ones who make the leasehold check part of their standard pre-instruction process for every flat and leasehold property. The check takes minutes. The fall-through it prevents takes months to recover from.
The Propalt Leasehold Risk Alerter surfaces lease length, ground rent structure and mortgage-ability risk for any flat or leasehold property from a single address input. The agent identifies the issues before the buyer's solicitor does – and the vendor can make informed decisions about pricing and remediation strategy before the listing goes live.
The leasehold problem that surfaces at week eight was visible at week one. The agent who checks first is the one whose sales complete.
Check every leasehold property for mortgage risk before it goes to market.
Try the Leasehold Risk Alerter → propalt.ai
Leasehold data sourced from Land Registry records via the Propalt intelligence layer. Lease extension cost estimates are indicative. This article is general information for estate agency professionals and does not constitute legal advice.
Leasehold Risk Alerter
For any flat or leasehold property, surfaces lease length, ground rent structure and mortgage-ability risk – flags problems before they derail a sale.
🎯 Best used for
Pre-instruction & sales progression
🔌 Propalt APIs used
get_leaseholds get_property_history get_comparable get_epc_fabric_by_property_id