Shared ownership is the main route onto the ladder for buyers who cannot raise a full deposit. You buy a slice of a home and rent the rest. It genuinely works for a lot of people — and it comes with terms that are easy to miss when you are reading a sales brochure. This is the plain version: what you pay, what you own, and what to check before you sign.
The short answer
A housing association owns the home. You buy a percentage of it with a normal deposit and mortgage — but sized against your share, not the full price — and pay subsidised rent to the association on the portion you do not own. Over time you can buy further shares, a process called staircasing, and in most cases work your way to 100%.
The deposit is where the scheme earns its place. On a £250,000 home, a 10% deposit for an open-market purchase is £25,000. Buying a 40% share, the same 10% deposit is calculated on £100,000 — so £10,000. For most people that gap is the entire difference between buying and not buying.
Three payments run at once: mortgage, rent, and service charge. That third one catches people out, because it is payable in full regardless of how small your share is.
Here is a worked example on a £250,000 home with a 40% share, a 10% deposit on that share, and a 25-year mortgage at 4.5%:
| Item | Basis | Monthly |
|---|---|---|
| Mortgage | £90,000 over 25 years at 4.5% | £500 |
| Rent | 2.75% a year on the £150,000 unsold share | £344 |
| Service charge | Illustrative flat, varies widely | £120 |
| Total | — | £964 |
Buying the same home outright with a 10% deposit would mean a £225,000 mortgage at roughly £1,251 a month — more expensive monthly, but requiring £25,000 up front instead of £10,000. That is the real trade: a much smaller deposit, in exchange for a payment that is only partly building you equity. Model your own numbers with our affordability calculator.
Rent on the unsold share is set by the provider, normally at 2.75% of its value per year and capped at 3%. It is genuinely below market rent, which is the subsidy.
It does not stay still. For leases signed from 12 October 2023, rent can rise once a year by up to CPI plus 1%. Older leases generally use RPI plus 0.5%. Either way the increase is formula-based and set out in your lease rather than left to the landlord's discretion — but it compounds, and over a long hold it adds up substantially. Rent paid on the unsold share buys you no equity at all.
Homes funded under the 2016–2021 programme and those under the 2021–2026 programme carry materially different leases. Sales material does not always make clear which you are looking at, so ask.
| Term | 2016–2021 model | 2021–2026 model |
|---|---|---|
| Minimum initial share | 25% | 10% |
| Staircasing increments | Minimum 10% | Minimum 5%, or 1% a year for 15 years |
| Repairs | Yours from day one | 10-year initial repair period with landlord support |
| Typical lease length | 99 or 125 years | 990 years |
The 1% route on newer leases is the meaningful change: it lets you increase your share without a full RICS valuation each time and with heavily reduced fees, which under the old rules made small increases uneconomic.
Each time you buy more, your rent falls and your equity rises. At 100% you stop paying rent entirely and can access ordinary mortgage products rather than specialist shared ownership ones.
The catch is that shares are priced at current market value, assessed by an independent surveyor. If prices have risen since you bought, the next slice costs more than the first — so the scheme is at its least helpful precisely when the market is running away from you. Valuation, legal and administration costs apply on top for anything above the 1% route.
Check before you buy: some leases, particularly in rural or protected areas, cap the maximum share at 80% so you can never reach full ownership. Your solicitor's report on title will confirm your staircasing rights — read that section properly rather than assuming 100% is available.
You are responsible for 100% of repairs and maintenance, even if you own 10% of the property. Owning a minority share does not give you a minority share of the boiler.
The one softening is on newer homes: those delivered under the 2021–2026 programme carry a ten-year initial repair period, during which the landlord contributes towards certain essential repairs. Outside that window, and on all older leases, the full liability is yours. Budget for it the way a full owner would, because in this respect you are one.
On a first purchase you choose between two approaches: pay stamp duty on the full market value up front, or pay only on the share you are buying and defer the rest until you staircase past 80%. Which is better depends on the price and your first-time buyer status — for many buyers below the first-time buyer threshold the full-value election is cheaper overall. This is a decision for your conveyancer, not a rule of thumb.
Selling is slower than an ordinary sale. The housing association normally has a nomination period during which it can find a buyer from its own waiting list before you can market the property openly. Resales also draw from a smaller pool of buyers, since purchasers must meet the same eligibility criteria. Factor that in if you might need to move quickly.
Shared ownership does the one thing that matters most to people locked out of buying: it cuts the deposit to something reachable. That is not a small thing, and dismissing the scheme outright ignores how binding the deposit constraint actually is.
But it is not half-price ownership. You carry a full owner's repair liability, a leaseholder's service charge, and a tenant's rent, while owning a fraction of the asset. It tends to work best where you expect to stay put for a good while, where you can realistically staircase, and where the alternative is private renting indefinitely. It works least well as a short-term stepping stone in a fast-rising market. Read it alongside affordable housing explained and can I afford to buy a house?
You buy a share of a home — usually between 10% and 75% — with a mortgage and deposit based on that share only, and pay subsidised rent to a housing association on the portion you do not own. You can buy further shares over time through staircasing. All shared ownership homes are leasehold.
Household income must be £80,000 a year or less, or £90,000 or less in London, and you must be unable to afford a suitable home on the open market. It is aimed mainly at first-time buyers, though former owners, existing shared owners moving home and some specialist routes can also qualify.
Rent on the unsold share is normally 2.75% of its value a year, capped at 3%. For leases signed from 12 October 2023, rent can rise once a year by up to CPI plus 1%. Older leases usually use RPI plus 0.5%.
You do, in full, even if you only own a small share. Homes under the 2021–2026 programme carry a ten-year initial repair period during which the landlord contributes to certain essential repairs, but outside that the whole property is your responsibility.
It lowers the deposit needed to get into a home, which is the main barrier for most buyers. The trade-off is paying a mortgage and rent at once, rent that builds no equity, full repair liability, and a slower sale. Whether that trade is worth it depends on local prices and how long you expect to stay.