Shared ownership mortgages explained

Shared ownership splits the cost of a home between you and a housing association. You buy a share of the property (between 25% and 75%), take out a mortgage on that share, and pay rent to the housing association on the portion they still own.

The rent is set at a subsidised rate, typically 2.75% of the housing association's share per year. On a £300,000 property where you buy 40%, the housing association owns 60% (£180,000), making your annual rent around £4,950 or roughly £413 per month. Combined with your mortgage payment, this is usually cheaper than buying outright or renting privately in the same area.

Shared ownership properties are available as new-build homes from housing associations and through resales of existing shared ownership properties. You find them through government-backed schemes and directly from housing associations operating in your area. The property must be your only home, and you cannot sublet it without permission from the housing association.

Key features of the current shared ownership model (post-April 2021):

• Initial share: Buy 25% to 75% of the property
• Staircasing: Buy additional shares in 5% increments (previously 10%)
• Repairs: Housing association covers the cost of essential repairs for the first 10 years, capped at £500 per repair
• Lease length: New shared ownership leases are granted for 990 years
• Resale: Housing association has an 8-week nomination period to find a buyer before you can sell on the open market

Shared ownership is aimed at people who cannot afford to buy a suitable home on the open market. To qualify in England, you must meet several criteria set by Homes England.

The core eligibility requirements 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 previous owner: Priority goes to first-time buyers, but you can also apply if you previously owned a home and cannot afford to buy one now, or you are an existing shared owner looking to move
• No current property: You must not currently own another property at the time of completing your purchase
• Able to demonstrate need: You must show that you cannot afford to buy a property suitable for your needs on the open market in the area

Individual housing associations may set additional criteria, such as a local connection to the area or a minimum period on a housing waiting list. Military personnel and their families receive priority access to shared ownership regardless of where they are stationed.

From a mortgage perspective, lenders apply their own affordability checks on top of these eligibility rules. They assess your income, outgoings, credit history, and existing debts. Most shared ownership lenders require a clean credit history, although some specialist lenders accept first-time buyers with minor credit issues. You need to demonstrate you can comfortably afford both the mortgage payment and the rent combined.

The total monthly cost of shared ownership includes your mortgage payment, rent to the housing association, and a service charge. Understanding all three is essential before you commit.

Your deposit is calculated on the share you buy, not the full property value. If you buy a 40% share of a £300,000 property, your share is worth £120,000. A 5% deposit on that share is £6,000, compared to £15,000 for a 5% deposit on the full price. This lower deposit requirement is one of shared ownership's biggest advantages for first-time buyers building a deposit.

Upfront costs include your deposit, mortgage arrangement fees, legal fees (typically £1,000 to £2,000 for shared ownership conveyancing, which is more complex than standard purchases), and a valuation fee. Stamp duty follows standard rules, but you only pay on the share you purchase. First-time buyers pay no stamp duty on shares up to £425,000, which covers most shared ownership purchases.

Be aware that the rent portion usually increases annually, typically by RPI plus 0.5% or CPI plus 1%. On the new model lease, rent increases are capped at CPI plus 1%. Budget for this when calculating long-term affordability. You can use a mortgage affordability calculator to check what you can borrow for your share.

Shared ownership offers a genuine route onto the property ladder, but it comes with trade-offs that are worth understanding before you apply.

Advantages

• Lower deposit: You only need a deposit on the share you buy, making it far more accessible. A 5% deposit on a 25% share of a £300,000 home is just £3,750
• Lower mortgage payments: Because you are borrowing less, your monthly mortgage payment is lower than buying outright
• Subsidised rent: The rent you pay on the housing association's share is below market rate
• Staircasing: You can increase your share over time, eventually owning the property outright
• Stamp duty savings: You pay stamp duty only on your share, and most first-time buyer purchases fall within the nil-rate band
• New repair responsibility: On post-2021 properties, the housing association covers essential repairs for 10 years

Disadvantages

• Total monthly costs: Mortgage plus rent plus service charge can approach the cost of buying outright with a higher deposit
• Rent increases: The rent portion rises annually, often above inflation
• Selling restrictions: The housing association has first refusal and an 8-week nomination period, which can slow the process
• Leasehold: Shared ownership properties are leasehold, bringing potential ground rent and service charge disputes
• Limited improvements: You typically need permission from the housing association before making alterations
• Fewer lenders: Not all mortgage lenders offer shared ownership products, which can limit your rate options
• Negative equity risk: If property values fall, you still owe the full mortgage on your share while continuing to pay rent on a share worth less

Staircasing is the process of buying additional shares in your property until you own it outright. Under the current model (post-April 2021), you can buy extra shares in increments as small as 5%, making it more affordable to increase your ownership gradually.

Each time you staircase, the property is revalued at current market prices. If the property has gone up in value, you pay more for each additional share than you would have at the original purchase price. If it has gone down, you pay less. You need a RICS-qualified surveyor to provide the valuation, which typically costs £300 to £500.

To finance a staircase purchase, you can remortgage to release equity, use savings, or take out a new mortgage for the additional share. Most people remortgage because the property value increase means they have built equity in their original share.

When you reach 100% ownership (known as "final staircasing"), you stop paying rent entirely and own the property outright. You may also be able to convert from leasehold to freehold at this point if the property is a house, though this involves additional legal costs.

Consider the costs carefully before staircasing. You pay the valuation fee, legal fees for the share transfer (£500 to £1,500), any mortgage arrangement fees, and potentially stamp duty on the additional share. Run the numbers to check that the reduction in rent outweighs these costs, especially if you plan to sell or move within a few years.

Applying for a shared ownership mortgage involves two parallel processes: qualifying for the scheme through a housing association and securing mortgage approval from a lender.

Start by registering with your local Help to Buy agent (now managed through Homes England's shared ownership portal). They assess your eligibility and, once approved, you can search for shared ownership properties in your area. Housing associations also list properties on their own websites and through property portals like Share to Buy.

Not all mortgage lenders offer shared ownership products. Around 20 to 30 lenders in the UK currently provide shared ownership mortgages, compared to over 100 for standard residential mortgages. This is why working with a broker who specialises in shared ownership can make a real difference. They know which lenders offer the best rates and have experience navigating the additional complexity of shared ownership applications.

The mortgage application itself is similar to a standard purchase. Lenders assess your income, outgoings, credit history, and deposit. The key difference is that they also factor in the rent and service charge when calculating affordability. You need to show you can comfortably cover all three payments.

Conveyancing for shared ownership takes longer than a standard purchase because the lease is more complex. Your solicitor needs experience with shared ownership transactions. Budget 8 to 12 weeks for the legal process, compared to 6 to 8 weeks for a straightforward purchase. If you are buying a new-build with a small deposit, some lenders may have additional requirements around valuations and build quality.