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Leasehold reform 2026: what the Commonhold & Leasehold Reform Bill means for property data
The Commonhold and Leasehold Reform Bill, introduced January 2026, is the most significant change to UK leasehold law since 1993. For conveyancers, mortgage lenders, and data providers, it creates new urgency around tenure screening, ground rent identification, and leasehold portfolio management at scale.
What the 2026 Bill does
The Commonhold and Leasehold Reform Bill was published in January 2026, building on the Leasehold Reform (Ground Rent) Act 2022 (which banned ground rent for new leases) and the Housing and Planning Act 2016. The 2026 Bill's main provisions:
- Ground rent cap on existing leases: residential leases with ground rents above £250/year (£1,000 in Greater London) are capped, with landlords required to accept a statutory reduction.
- Commonhold as default: new flat developments must be structured as commonhold unless specific exceptions apply.
- Right to Manage: qualifying threshold reduced from 50% to 25% of leaseholders in a building.
- Lease extension: statutory lease extension term extended to 990 years at zero ground rent for both flats and houses.
- Transparency: freeholders must provide leaseholders with annual service charge accounts in a standardised format.
Why this matters for property data
The ground rent cap creates an immediate need for portfolio screening. Landlords, managing agents, and mortgage lenders holding or advising on leasehold properties need to identify which properties have ground rents above £250/year, and the data is not easily accessible.
Ground rent figures are embedded within individual lease documents filed at HMLR, not in structured digital registers. A £3 title register purchase shows that a property is leasehold; accessing the actual ground rent requires a further £3–£7 lease document purchase per title, followed by manual or OCR extraction.
What is programmatically accessible today
Via the Homedata ownership API , the following leasehold data is available as structured JSON for any UPRN in England and Wales:
Not yet in structured digital form: lease length, ground rent amount, service charge, and lease extension history. These require HMLR document purchase.
- Tenure type: leasehold, freehold, or commonhold
- Title number: HMLR title reference
- Title class: absolute, good leasehold, qualified, or possessory
- Registered proprietor: registered owner name
- Date of registration: when the current title was registered
Use cases for conveyancers and lenders
- Tenure screening at instruction: identify leasehold properties immediately when an address is added to case management, triggering the appropriate leasehold-specific workflow.
- Portfolio ground rent audit: for managing agents, batch tenure identification allows a systematic approach to identifying properties needing HMLR document review for ground rent compliance.
- Mortgage applications: lenders can flag leasehold properties at application stage for additional title checks, without waiting for the borrower's solicitor to report.
- Proptech platforms: surface tenure information on property search tools, alerting buyers to leasehold status before viewing.
Related guides
Tenure screening API
Identify leasehold properties at scale: batch UPRN lookups returning tenure, title class, and proprietor.
Leasehold data API guide · Find property ownership · Data for conveyancers
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What does the Commonhold and Leasehold Reform Bill 2026 do?
The Commonhold and Leasehold Reform Bill, introduced in Parliament in January 2026, makes four main changes: (1) caps ground rents for existing residential leases at £250/year; (2) prohibits ground rent in new leases; (3) makes commonhold the default tenure for new flat developments; (4) reduces the Right to Manage qualifying threshold from 50% to 25% of leaseholders. The Bill is currently passing through Parliament.
How does the leasehold reform affect property data and APIs?
The reform increases demand for leasehold tenure screening tools: conveyancers, mortgage lenders, and portfolio managers need to identify properties with ground rents above £250/year. While ground rent figures are contained within individual lease documents (not structured digital registers), tenure type (leasehold/freehold/commonhold) is queryable via the Homedata ownership API for any UPRN in England and Wales. Programmatic tenure screening at portfolio scale is now commercially important.
What is commonhold tenure?
Commonhold is a form of property ownership where flat owners in a block own their individual unit outright (freehold) and collectively own the common areas through a Commonhold Association. Unlike leasehold, commonhold has no expiry date, no ground rent, and no absentee freeholder. The Commonhold and Leasehold Reform Bill 2026 aims to make commonhold the default for new flat developments in England and Wales.
How does leasehold reform affect property data?
It creates new urgency for tenure screening and ground rent identification. Homedata's ownership API returns tenure type (leasehold/freehold/commonhold) for any UPRN in England and Wales. Ground rent amounts require HMLR document purchase.
What is commonhold?
A tenure where flat owners own their unit outright and collectively own common areas via a Commonhold Association, no expiry date, no ground rent, no absentee freeholder.
Tenure screening API
Identify leasehold properties at scale: batch UPRN lookups returning tenure, title class, and proprietor.
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