Shared Ownership, The New Model Lease Explained

Shared Ownership is the UK scheme where you buy part of a home and rent the rest, with the option to buy more over time. It's been around since 1980 in various forms, but the version offered today, the new model lease introduced under the Affordable Homes Programme 2021-26, is significantly more buyer-friendly than older versions. Lower minimum share, much longer lease, gradual buy-out, and 10 years of free repairs.

How Shared Ownership works

You buy a share of the property, typically 25-75%, and pay a subsidised rent on the remaining share to a housing association or local authority. Your monthly outgoings combine: mortgage on your share + rent on the rest + service charges (for shared areas).

Over time, you can buy more of the property, called staircasing, until you own 100%. At that point, the rent component disappears and you own the home outright (subject to whatever tenure type the lease specifies, usually leasehold for flats, freehold for some houses).

The new model lease, what changed in 2021+

Five major changes apply to all Shared Ownership homes built under the Affordable Homes Programme 2021-2026:

• Minimum initial share dropped from 25% to 10%. You can now buy as little as 10% of a property, making the entry cost much lower.
• Lease length raised to 990 years. Older Shared Ownership leases were 99 or 125 years, many had become a leasehold problem as years ticked down. New leases are effectively permanent.
• Gradual staircasing. You can buy 1% per year for the first 15 years with heavily reduced fees. Previously, staircasing had to happen in 10%+ chunks with full valuation each time.
• Smaller staircasing chunks after year 15. Beyond 15 years, the minimum staircasing tranche dropped from 10% to 5%.
• 10-year landlord repair coverage. The housing association covers repair costs in the first 10 years, with shared owners able to claim back up to £500/year for repairs.

Pre-2021 leases, what's different

If you're buying a second-hand Shared Ownership property, i.e. one being sold by someone who bought it themselves, the lease that came with the original purchase still applies. So second-hand Shared Ownership homes bought in 2026 may still have:

Before buying a second-hand Shared Ownership property, check carefully: the lease length remaining, the minimum staircasing chunk, ground rent, service charges, repair responsibilities. The new model lease is a clear win, but you only get it on new builds under the 2021 programme.

• 99 or 125-year original leases (with some years already used).
• 25% minimum initial share (relevant only if you're a future second-hand buyer).
• 10% minimum staircasing chunks throughout the life of the lease.
• No 10-year repair coverage, you've owned all repairs from day one.
• Older ground rent and service charge structures.

Real cost: deposit, mortgage, rent, service charges

On a £300,000 property with a 25% initial share and a 5% deposit on your share:

• Your share value: £75,000 (25% of £300,000)
• Your deposit: £3,750 (5% of £75,000)
• Your mortgage: £71,250 (95% of £75,000)
• Approximate mortgage payment at 5.2% over 30 years: ~£390/month
• Rent on remaining 75% share (typically 2.75% of the share value annually): £225,000 × 2.75% ÷ 12 = ~£515/month
• Service charges (vary widely, often £100-£300/month)
• Total monthly outgoings: ~£1,055-£1,255 (excluding council tax and bills)

Who qualifies for Shared Ownership?

Eligibility is set by the government:

• Household income under £80,000 (or £90,000 in London).
• Be a first-time buyer, an existing shared owner moving home, or someone who used to own a home but can't afford one now.
• Not be able to afford to buy a home outright that meets your needs in the area.
• Have enough income and savings to cover deposit, fees, and ongoing payments.
• Pass the housing provider's affordability assessment.

Mortgages for Shared Ownership

Not every lender offers Shared Ownership mortgages, but most major UK lenders do, Halifax, Nationwide, Santander, Barclays, Leeds Building Society, Newbury, Skipton, and others. The lender takes a charge over your share only, not the whole property.

Deposit requirements typically start at 5% of your share value. Affordability is assessed on your share's mortgage payment + the rent on the unsold share, so the rent counts as a monthly commitment in the lender's calculations, which usually means you can't borrow quite as much as you would on a non-Shared-Ownership purchase. A broker familiar with Shared Ownership lenders is genuinely useful, criteria and rates vary widely.

Selling a Shared Ownership home

Selling needs more thought than a standard sale. The housing association usually has a nomination period, typically 4-8 weeks, during which they try to find an eligible Shared Ownership buyer through their waiting list. If they can't, you can market the property on the open market to anyone who meets eligibility.

Sale prices are based on a market valuation of your share. If you've staircased to 100%, you can sell to anyone with no nomination period (though restrictive covenants may still apply on some new-build estates).

Shared Ownership under the new model lease is genuinely a much better deal than the version your parents may remember. 10% shares, 990-year leases, gradual staircasing, free repairs for 10 years, these are the kinds of buyer protections that didn't exist before 2021. For households earning under the cap and unable to buy outright in the area, it's worth a proper look. Debbie at DS Financial handles Shared Ownership mortgage applications regularly and can match you to the right lender for your share size and circumstances.

General information, not financial advice. Your home may be repossessed if you do not keep up repayments on your mortgage.

Sources: GOV.UK, Shared Ownership Capital Funding Guide, Share to Buy, New Shared Ownership model, MoneyHelper, Shared Ownership explained.