Mortgage Guide: Shared Ownership Explained — How It Works, Costs and Whether It's Right for You in 2026

Under the shared ownership scheme, you buy a percentage share of a new-build or resale property from a housing association (also called a 'registered provider' or landlord). You take out a mortgage on your share and pay subsidised rent (the Help to Buy agent can help you find properties) on the portion you do not own.

The key features for properties purchased under the current model (from April 2021 onwards) are:

• Share range: You can buy between 10% and 75% of the property's market value. Most buyers start at 25–50%.
• Deposit: You need a deposit of 5–10% of your share value — not the full property value. So for a £250,000 property with a 25% share (£62,500), a 5% deposit would be just £3,125.
• Rent: Capped at 2.75% of the housing association's share per year. On the example above, rent on the £187,500 housing association share would be a maximum of £5,156 per year, or about £430 per month.
• Staircasing: You can buy additional shares over time, typically in increments of 5% or 10%, at the current market value. As your share grows, your rent reduces proportionally.
• Leasehold: All shared ownership properties are leasehold. The initial lease is usually 990 years for new-build properties, but older resales may have shorter leases.

Full eligibility details are on the GOV.UK shared ownership page. The scheme is available in England. Scotland, Wales, and Northern Ireland have separate shared ownership arrangements with different rules and eligibility criteria.

Shared ownership is designed for people who cannot afford to buy a home on the open market. The eligibility criteria are:

• Household income: Your total household income must be £80,000 or less per year (or £90,000 or less in London)
• First-time buyer or: You must be a first-time buyer, a previous homeowner who cannot afford to buy now, or an existing shared owner looking to move
• Cannot afford outright: You must demonstrate that you cannot afford to buy a suitable home on the open market in your area
• No outstanding credit issues: Lenders and housing associations will check your credit history
• UK resident: You must be legally entitled to live in the UK

Priority is often given to existing social housing tenants, military personnel, and people with a local connection to the area where the property is located.

It is worth noting that shared ownership is not restricted to new-build properties. Housing associations also sell existing shared ownership homes through resale programmes (sometimes called 'resales' or 'second-hand shared ownership'). These can offer better value, as you may pay less per square foot than a new build.

One of the most common criticisms of shared ownership is that buyers underestimate the total monthly cost. Your outgoings are not just the mortgage — you also pay rent, service charges, and potentially ground rent.

Here is a realistic breakdown for a £300,000 property with a 40% share (£120,000), a 5% deposit (£6,000), and a £114,000 mortgage at 4.5% over 25 years (see our guide to UK mortgage rates for current deals):

• Mortgage repayment: approximately £634 per month
• Rent (2.75% of £180,000 ÷ 12): approximately £413 per month
• Service charge: typically £100–£200 per month (varies by property and block)
• Ground rent: often £0–£50 per month (new builds from 2022 should have peppercorn ground rent)
• Buildings insurance: usually included in service charge for flats, separate for houses

Total estimated monthly cost: £1,147–£1,297

Compare this to buying the same property outright: a £300,000 mortgage at 4.5% over 25 years costs about £1,667 per month, plus you would need a much larger deposit. The shared ownership route costs less per month, but you do not own 100% of the property.

The rent component is key. While 2.75% is the maximum for new schemes, some housing associations charge less. Rent increases are typically capped at RPI (Retail Prices Index) plus 0.5% or CPI (Consumer Prices Index) plus 1%, depending on the lease terms. Over 10–20 years, these increases can be significant.

Staircasing is the process of buying additional shares in your property, with the eventual goal of owning it outright (100%). Each time you staircase, the share is purchased at the current market value — not the original purchase price.

This means:

• If property values have risen, you pay more per share than the original buyers
• If property values have fallen, you may be able to staircase more cheaply
• You will need a RICS-qualified surveyor to value the property each time you staircase, at your expense (typically £300–£500)

You can usually staircase in increments as low as 5% or 10%, though some housing associations set minimum staircasing percentages. When you reach 100% ownership, you stop paying rent and can either stay in the property freehold (for houses) or remain as a leaseholder (for flats).

The costs of staircasing include:

• The price of the additional share
• Surveyor's valuation fee
• Legal fees (conveyancing)
• Stamp Duty Land Tax (SDLT) — applicable from the point where your total share reaches the SDLT threshold
• Possible mortgage arrangement fees if you remortgage to fund the purchase

For properties under the current model (post-April 2021), there is a 10-year initial repair period where the housing association is responsible for certain structural repairs. After 10 years, or once you staircase past 100%, full repair responsibility transfers to you.

Related reading: mortgage guide.

Advantages:

• Much smaller deposit required (as low as £3,125 on a £250,000 property)
• Lower mortgage means easier to pass affordability checks
• Subsidised rent below market rate
• Path to full ownership through staircasing
• New-build properties come with NHBC warranty and initial repair period
• Right to make improvements (with landlord consent) that can increase your share's value

Disadvantages:

• You pay both a mortgage and rent, plus service charges — total costs can approach open-market buying
• Staircasing at current market value means you pay more if prices rise, negating some of the initial saving
• Selling can be slower — the housing association has a nomination period (usually 4–8 weeks) to find a buyer before you can sell on the open market
• Leasehold obligations: you need permission for alterations, and may face escalating service charges
• Not all mortgage lenders offer shared ownership products, potentially limiting your choice of deals
• Subletting is generally not allowed without the housing association's consent

Alternatives to consider:

• First Homes scheme: New-build properties sold at a 30–50% discount to local first-time buyers (discount tied to the property in perpetuity)
• Deposit Unlock: Some housebuilders offer 95% LTV mortgages on new builds with a builder-funded insurance product
• **Lifetime ISA: Save up to £4,000 per year with a 25% government bonus (up to £1,000/year) towards your first home, provided the property is worth £450,000 or less
• **Help to Buy equity loan: Now closed to new applications, but existing participants still benefit
• Right to Buy / Right to Acquire: For existing council or housing association tenants

This article is for informational purposes only and does not constitute regulated financial advice. Shared ownership is a significant financial commitment — consult a qualified mortgage adviser (check they're FCA-authorised at fca.org.uk/register) before proceeding.