Shared Ownership Explained — How It Works, Staircasing, and Whether It Makes Sense

What Is Shared Ownership?

Shared ownership is a government-backed scheme that allows eligible buyers to purchase a share of a property — between 10% and 75% of its full market value — and pay a subsidised rent to the housing association on the share they do not own. Over time, buyers can purchase additional shares through a process called staircasing, potentially reaching 100% ownership.

The scheme is designed to help people who cannot afford to buy a home outright to get onto the property ladder with a lower initial deposit and mortgage requirement.

Eligibility

To qualify for shared ownership in England, your household income must be below £80,000 per year (£90,000 in London). You must be a first-time buyer, or a former homeowner who cannot currently afford to purchase a property suitable for your needs. Some schemes are reserved for specific groups, such as key workers or existing social housing tenants.

Eligibility is assessed at the point of purchase. If your circumstances change after you have bought, this does not affect your ownership.

The Deposit

Your deposit is calculated as a percentage of the share you are buying, not the full market value of the property. If a property is valued at £300,000 and you are buying a 40% share (£120,000), a 10% deposit means £12,000 — not £30,000. This significantly reduces the upfront cash required compared to an outright purchase.

However, the deposit still needs to be saved, and the transaction still involves solicitors’ fees, survey costs, and Stamp Duty Land Tax (SDLT) considerations.

Rent on the Unsold Share

You pay rent to the housing association on the share you do not own. This rent is typically set at 2.75% to 3% per annum of the value of the unsold share. On a £300,000 property where you own 40%, the unsold share is worth £180,000, meaning annual rent of approximately £4,950 to £5,400, or £412 to £450 per month.

This rent is in addition to your mortgage payment. Total monthly outgoings (mortgage + rent + service charge) can be comparable to or exceed the cost of buying outright if market conditions allow.

Rent is typically reviewed annually and can increase. Understand the rent review mechanism in your lease before you commit.

Service Charges

Shared ownership properties are almost always leasehold, which means you will also pay a service charge to cover the maintenance of communal areas, building insurance, and management costs. Service charges can be significant — budget for £1,500 to £3,000 or more per year on a typical flat — and can increase over time.

Staircasing

Staircasing is the process of buying additional shares in your property. Under the reformed shared ownership model introduced from 2021, buyers can staircase in increments as small as 1%. Previously, the minimum tranche was typically 10%.

Each time you staircase, the share is valued at the current market value of the property — not the price you originally paid. If property values have risen, staircasing becomes more expensive. Each staircase transaction also involves solicitors’ fees and, if the cumulative ownership crosses the relevant SDLT threshold, a Stamp Duty liability.

Once you reach 100% ownership, you cease paying rent, and your lease should provide for the freehold to be acquired (for houses) or the ground rent to be extinguished (for flats).

The Lease

Shared ownership properties come with a lease, typically 99 to 125 years initially. As with any leasehold property, the lease will run down over time, reducing the value of the property and making it harder to mortgage and sell. It is important to extend the lease before it falls below around 80 years. Under the new model, housing associations are required to grant lease extensions to shared owners, but this is not cost-free.

Resale

Selling a shared ownership property is more complicated than selling outright. You must notify the housing association, which has a “nomination period” — typically eight weeks — during which it can find a buyer from its waiting list. If it cannot find a buyer, you are free to sell on the open market, but the buyer must still meet shared ownership eligibility criteria unless you own 100%.

This restricts your buyer pool and can slow down the sale process. Factor this into your long-term plans.

Restrictions

Shared ownership leases typically prohibit subletting the property. You may also need the housing association’s permission to carry out certain alterations. Read the lease carefully before committing.

Is Shared Ownership Right for You?

Shared ownership works best for buyers who have a stable income, plan to stay in the property for a reasonable period, and intend to staircase towards full ownership over time. It is less suitable for those who anticipate moving frequently, need flexibility to sublet, or who are comparing it only on monthly cost without accounting for rent increases and service charges.

Compare the total monthly cost (mortgage + rent + service charge) against renting privately and against buying outright with a different approach to saving the deposit before deciding.