Statutory Diligence GuideUpdated October 2026Follow on Google★

Does GOV.UK Provide a Free Lease Extension Calculator?

Statutory Source: The Leasehold Advisory Service (LEASE - An Executive Non-Departmental Public Body)

Quick Answer: Does GOV.UK Provide a Free Lease Extension Calculator?

GOV.UK does not host an interactive lease extension calculator directly on its main gov.uk website. Instead, the UK Government funds The Leasehold Advisory Service (LEASE)—an official executive non-departmental public body sponsored by the Ministry of Housing, Communities & Local Government (MHCLG)—which provides statutory guidance and an online estimation tool. Homeowners can also use independent online calculators, such as our Leasehold Extension Premium Calculator 2026, which models the updated Leasehold and Freehold Reform Act 2024 schedules with 990-year terms and zero marriage value.

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Official Government Guidance: The LEASE Service

The Leasehold Advisory Service (LEASE) is an independent body funded by government to provide free legal advice to residential leaseholders in England and Wales.

While LEASE provides basic calculators, they explicitly advise leaseholders to treat online figures as preliminary estimates for budgeting purposes.

Before serving a formal Section 42 Notice on your freeholder, you should always instruct a qualified RICS valuation surveyor who will inspect local comparable transactions and defend your proposed opening premium before the First-tier Tribunal (Property Chamber) if the landlord disputes your figure.

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Check Any Property Across 12 Official Statutory Registers

Conducting property due diligence requires cross-referencing multiple public registries. Run a free instant desktop screening across Environment Agency flood models, British Geological Survey subsidence data, UKHSA radon maps, HM Land Registry sold prices, and local planning constraints.

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Environment Agency FloodingSurface water, rivers & sea risk bands

BGS Ground StabilityShrink-swell clay & subsidence risk

UKHSA Radon Gas PotentialOfficial radon class & protection rules

HM Land Registry PricesHistorical transactions & tenure type

EPC Energy & RdSAP SpecsOfficial construction era & wall fabric

Planning Applications BufferRecent nearby planning notices (500m)

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Official Primary Verification Registers

Cross-reference property diligence across verified UK government open registers under the Open Government Licence v3.0:

Category: Leasehold Reform & Valuation Formula

Property Age & RdSAP Era

Official construction age bands, wall specifications, and earliest conveyance dates.

MHCLG Energy ActOpen Tool

Council Tax & Precepts

Statutory Band A–H ratios, police/fire levies, and 1 April 1991 baseline thresholds.

Local Govt Finance Act 1992Open Tool

Public Rights of Way (PRoW)

Conclusive legal proof of footpaths, bridleways, and restricted byways on land.

Wildlife & Countryside Act 1981Open Tool

Planning & Consultations

Live planning applications, 21-day neighbor notices, and permitted development appeals.

Town & Country Planning Act 1990Open Tool

Flood Risk & Surface Water

Statutory Flood Zones 1, 2, 3, 30/100/1000-year pluvial models, and Flood Re rules.

Flood & Water Mgt Act 2010Open Tool

Land Registry Sold Prices

Verified historical completion prices, title deed values, and regional ONS house price indices.

Land Registration Act 2002Open Tool

Stamp Duty (SDLT)

Exact progressive residential thresholds, £300k FTB relief, and 5% additional home surcharges.

Finance Act Statutory ScheduleOpen Tool

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Inspect Any UK Property on Our Leasehold Extension Premium Calculator 2026

Run an instant preliminary screening across official government databases including the MHCLG EPC register, HM Land Registry, and Environment Agency records.

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Official Statutory Notice & Guidance:

This guide is compiled for informational due diligence referencing official statutory records from The Leasehold Advisory Service (LEASE - An Executive Non-Departmental Public Body) under the Open Government Licence v3.0. Legal titles and physical structural condition should always be independently inspected by a qualified conveyancing solicitor and chartered RICS surveyor prior to legally binding property commitments.