Shared Ownership can reduce the amount you need to borrow to get onto the property ladder, but it is not simply a smaller version of an ordinary house purchase.
You buy a percentage of the property and take a mortgage on that share. The landlord or housing provider retains the rest, and you pay rent on the share you do not own.
You will also commonly have service charges, management fees or estate charges to pay.
The practical monthly cost is therefore usually mortgage + rent + service or estate charges, rather than the mortgage payment alone.
That distinction is essential when deciding whether Shared Ownership genuinely improves affordability.
What is Shared Ownership?
In England, Shared Ownership allows an eligible buyer to purchase part of a home and rent the remaining share from a housing association, local authority or another approved provider.
Current government guidance says buyers can purchase between 10% and 75% of the property's full market value, although not every home offers a 10% starting share.
All Shared Ownership homes are leasehold, whether the property itself is a flat or a house.
That means you are not simply buying '25% of the bricks'. You are acquiring a leasehold interest that gives you the agreed equity share and sets out your obligations to the landlord.
Who can use Shared Ownership?
Shared Ownership is not limited to first-time buyers.
Current eligibility in England generally requires:
- household income of no more than £80,000 a year, or £90,000 in London;
- that you cannot afford all of the deposit and mortgage payments for a suitable home;
- and that you fall into an eligible category.
Those categories include first-time buyers, previous homeowners who can no longer afford to buy outright, people forming a new household after events such as relationship breakdown and existing Shared Ownership owners who want to move.
Some developments also apply local connection or other prioritisation rules.
Shared Ownership should therefore not be treated as an automatic entitlement simply because your income falls below the threshold.
How much of the property do I buy?
The housing provider will normally assess what share you can reasonably afford.
You are not always free to choose the smallest percentage simply because it gives you the lowest mortgage.
The affordability assessment looks at your income and expenditure and is intended to identify an appropriate share rather than encouraging you to rent a larger percentage unnecessarily.
Homes England guidance confirms that the share is determined through an affordability assessment as part of the provider's application process.
How does the mortgage work?
Suppose a property is worth £300,000 and you buy a 40% share.
Your share costs £120,000.
You arrange a Shared Ownership mortgage against that £120,000 share rather than borrowing against the whole £300,000 property.
With a 10% deposit on your share, the deposit would be £12,000 and the mortgage £108,000.
You then pay rent to the housing provider on the remaining 60% share.
This is why Shared Ownership can reduce both the initial deposit and the mortgage required.
Is the deposit based on my share or the whole property?
Usually it is based on the share you are purchasing.
Government guidance says Shared Ownership buyers commonly need a deposit of around 5% to 10% of the share being bought.
Using the same £300,000 example:
- full property value: £300,000;
- 40% share: £120,000;
- 5% deposit on the share: £6,000;
- 10% deposit on the share: £12,000.
That is very different from finding a 10% deposit against the full £300,000 property.
Lender criteria still apply. A government example showing a 5% deposit does not mean every lender will provide a 95% mortgage on every Shared Ownership purchase.
Leeds Building Society currently advertises qualifying Shared Ownership lending of up to 95% of the borrower's share. That is an individual lender position rather than a universal rule.
How much rent do I pay on the share I do not own?
The rent is calculated on the landlord's retained share.
For a new-build Shared Ownership home, current government guidance says the initial annual rent can be up to 3% of the value of the landlord's share, with 2.75% commonly charged.
If the £300,000 property is purchased at a 40% share, the landlord retains 60%, worth £180,000. At 2.75%, the first-year rent would be £4,950 a year, or approximately £412.50 a month.
That rent sits alongside the mortgage payment.
For a Shared Ownership resale, the rent generally continues from the existing Shared Ownership arrangement rather than automatically being reset to a new 2.75% calculation.
Rent can also increase over time according to the lease.
Is there ground rent as well?
For qualifying new Shared Ownership leases covered by the Leasehold Reform (Ground Rent) Act 2022, any rent attributable to the leaseholder's owned share is limited to a peppercorn, effectively zero. The landlord can still charge Shared Ownership rent on its retained equity share.
Older leases and replacement-lease situations can be different, so the lease should be checked rather than assuming every historical Shared Ownership property has identical ground-rent terms.
Does the lender include the rent when assessing affordability?
Yes. A Shared Ownership mortgage cannot sensibly be assessed using the mortgage payment alone.
The affordability assessment needs to take account of other compulsory housing costs, which can include:
- rent on the unsold share;
- service charge;
- estate charge;
- management fee;
- reserve-fund contributions;
- other existing financial commitments.
Government guidance specifically requires affordability to consider the mortgage, rent and monthly charges associated with the home.
A smaller mortgage therefore does not necessarily mean the total monthly housing cost will be proportionately smaller.
What service charges will I pay?
That depends on the property and lease.
Shared Ownership flats commonly have service charges covering communal or building costs.
Houses can also have estate charges or management fees for roads, landscaping and shared facilities.
Government guidance says buyers may have to pay service charges, estate charges, management fees, buildings insurance and contributions to a repair reserve fund.
These costs need to be understood before reservation and exchange.
A relatively low mortgage payment can become considerably less attractive if the property also carries substantial leasehold charges.
If I only own 25%, do I only pay 25% of the repairs?
Not necessarily. Your equity percentage does not automatically determine the percentage of every maintenance or repair bill you pay.
Government guidance states that Shared Ownership leaseholders generally remain responsible for repairs and maintenance regardless of the percentage they own, subject to the lease and any applicable initial repair period.
For flats, the landlord normally arranges external and structural repairs, but costs can be recovered through the service charge or reserve fund in accordance with the lease.
Owning 25% of the equity therefore does not automatically mean the housing provider pays 75% of every repair.
What is the initial repair period?
Some newer Shared Ownership leases contain an initial repair period.
Current government guidance says this usually lasts 10 years and applies while the shared owner holds less than 100%.
During that period, the landlord can be responsible for certain essential external and structural repairs.
Eligible leaseholders may also be able to claim up to £500 per year towards certain qualifying repairs to installations supplying water, gas, electricity or heating, subject to the scheme rules.
This is not a general benefit applying to every Shared Ownership home.
Older leases may not contain an initial repair period at all.
The property's key information document and lease need to be checked rather than assuming the landlord will pay simply because the home is Shared Ownership.
What happens after the initial repair period?
Normal lease responsibilities apply.
That can leave the shared owner responsible for the cost of maintaining the property even though the housing provider still owns a substantial equity share.
For a house, that can mean direct responsibility for maintenance.
For a flat, structural or communal works may be arranged by the landlord but recovered through service charges under the lease.
Can I make improvements?
Ordinary decoration and refurbishment is usually possible, but structural changes can require the landlord's written consent.
Government guidance advises Shared Ownership owners to check with the landlord before carrying out structural alterations.
This becomes relevant when you later staircase.
Where authorised improvements have increased the property's value, the valuation process can distinguish between the improved and unimproved value when calculating the cost of buying additional shares.
What is staircasing?
Staircasing means buying a larger percentage of the property after your initial purchase.
As your percentage increases, the landlord's share decreases and your rent is reduced accordingly.
If you originally bought 40% and later bought another 20%, you would own 60%. Your rent would then be calculated on the landlord's remaining 40%.
How much can I staircase at a time?
This depends heavily on the lease.
Current Shared Ownership leases can allow purchases of 5% or more.
Some eligible newer leases also permit the owner to buy a 1% share each year for the first 15 years.
Older leases can require larger minimum increments, including 10% or even 25%.
Statements such as 'you can always staircase 1% at a time' are therefore incorrect.
The lease and key information document determine what applies.
How is the price of another share calculated?
For standard staircasing, the price is normally based on the property's current market value.
Government guidance requires a valuation by a RICS-registered surveyor when buying qualifying additional shares.
Suppose your home has risen from £300,000 to £360,000. Buying another 10% would broadly cost £36,000, not 10% of the original £300,000 value.
If property prices rise, you benefit from the increase in the percentage you already own, but the landlord's remaining share also becomes more expensive to buy.
If values fall, future staircasing can become cheaper.
Can I staircase to 100%?
For most Shared Ownership properties, yes, but important exceptions exist.
Government guidance says some homes in designated protected areas may cap ownership at 80%, while Older Persons Shared Ownership has a maximum share of 75%.
Other rural or specialist schemes can also contain restrictions.
Leeds Building Society's current standard Shared Ownership criteria require the customer to be able to staircase to 100%. That is a Leeds criterion, not a universal lender requirement.
What happens to the tenure if I staircase to 100%?
That depends on the property and lease.
With many Shared Ownership houses, the lease provides for the shared owner to acquire the freehold once they staircase to 100%. Flats generally remain leasehold because the building still needs a leasehold structure for communal ownership and management.
Homes England's current funding guidance also recognises that some Shared Ownership homes remain leasehold at 100% while others become freehold, so the individual lease should be checked rather than assuming full staircasing always changes the title in the same way.
Do I need a new mortgage every time I staircase?
Not necessarily, but the additional share needs to be funded.
Possible routes include:
- savings;
- additional borrowing from the existing lender;
- remortgaging;
- another approved finance route.
If you borrow more, affordability and valuation need to work at that time.
Staircasing can also involve valuation, legal and landlord administration costs, so transaction costs need to be considered alongside the price of the extra share.
What happens to the rent when I staircase?
It falls because the landlord owns less.
If you own 40%, rent is paid on 60%. If you staircase to 75%, rent is paid on the remaining 25%.
If you reach 100% where full staircasing is permitted, there is normally no Shared Ownership rent because the landlord no longer retains an equity share.
Service charges and other leasehold costs can still continue, especially for flats.
What happens when I sell?
If you own less than 100%, you normally need to notify the landlord first.
The landlord is then given a period in which it can nominate or find another eligible buyer.
Current government guidance says this nomination period can be 4, 8 or 12 weeks depending on the lease.
The sale price is normally based on current market value established through a RICS valuation.
If the landlord does not find a buyer during the applicable period, you may then be able to market the share yourself, subject to the lease.
Does Shared Ownership make a property harder to sell?
Potentially, because selling a part-share property involves more steps than selling an ordinary property outright.
A purchaser may need to meet Shared Ownership eligibility, pass the provider's affordability assessment, obtain an appropriate Shared Ownership mortgage and accept the lease and continuing rent or service charges.
There may also be a nomination period before wider marketing.
However, Shared Ownership can also make the property accessible to buyers unable to afford the full market value.
Resale therefore depends heavily on the property, share percentage, lease, rent, charges and local demand.
Is Shared Ownership the same as Shared Equity?
No. They are different structures.
With Shared Ownership, you purchase a leasehold percentage and pay rent on the landlord's retained share.
Shared Equity generally involves the buyer owning the property while another party holds an equity loan or similar financial interest.
The legal structure, monthly payments and lender criteria are different.
What is the Mortgage Protection Clause?
The Shared Ownership lease contains provisions designed to protect both the landlord and the mortgage lender.
One important feature is the Mortgage Protection Clause, often abbreviated to MPC.
Homes England's current guidance explains that the MPC allows a lender, if it has to take possession following mortgage default or another breach of the mortgage contract, to recover an eligible Mortgagee Protection Claim from the landlord's share, subject to the detailed cap and lease terms.
The claim can include specified secured lending, limited interest and certain costs connected with protecting and enforcing the lender's security. It is therefore more precise than describing the MPC as a general guarantee against every loss.
Homes England generally supports adding its current model MPC to qualifying older Shared Ownership leases where one is missing, subject to the relevant requirements.
This is principally a conveyancing and lender-security issue. Your solicitor must ensure the lease satisfies the lender.
Do mortgage lenders have special Shared Ownership criteria?
Yes. The lender is assessing more than the borrower's income and credit profile.
It also needs to be comfortable with:
- the percentage being purchased;
- the lease;
- the housing provider;
- staircasing provisions;
- rent and service charges;
- the property itself;
- lender-security provisions.
Different lenders can impose different share and maximum-LTV requirements.
Leeds Building Society currently advertises qualifying Shared Ownership lending up to 95% of the borrower's share and requires standard applicants to be able to staircase to 100%.
That illustrates why an Agreement in Principle for an ordinary purchase cannot simply be assumed to apply unchanged to Shared Ownership.
Is Shared Ownership always cheaper than buying normally?
No. It can reduce the initial mortgage and deposit requirement, but the complete housing cost needs to be compared.
That includes mortgage payments, rent on the unsold share, service charges, estate or management fees, insurance, future rent increases, repair responsibilities and staircasing costs.
Someone with a £120,000 Shared Ownership mortgage may have a much smaller loan than somebody borrowing £270,000 outright, but the Shared Ownership buyer also pays rent and potentially substantial leasehold charges.
The correct comparison is the total housing cost, not simply the mortgage balance.
Is Shared Ownership cheaper than renting?
It can be, but not automatically.
Part of your monthly outgoings services a mortgage on an asset you own, which differs from ordinary rent.
You also participate in gains or losses in the value of the percentage you own.
However, you still pay rent on the unsold share and can remain responsible for repair and service-charge costs that a private tenant would normally expect their landlord to handle.
Whether Shared Ownership is financially preferable therefore depends on the particular property and your circumstances.
What happens if property prices rise?
You benefit from the increase in the percentage you own.
If a £300,000 property rises to £360,000 and you own 40%, your share has broadly increased from £120,000 to £144,000 before mortgage debt and transaction costs.
However, the landlord's remaining share has increased in value as well, making future staircasing more expensive.
Shared Ownership therefore gives you exposure to the housing market in proportion to your share.
What happens if property prices fall?
The reverse applies. Your share can lose value.
If you have a high-LTV mortgage against the share, negative equity is possible just as it is for other homeowners.
Shared Ownership does not guarantee preservation of your deposit.
How does Stamp Duty work on Shared Ownership?
Shared Ownership has specific Stamp Duty Land Tax rules in England.
Broadly, a qualifying buyer can choose between making a market value election, where SDLT is calculated using the full market value at the outset, or paying SDLT in stages.
Under the staged route, current HMRC guidance says further SDLT is generally not due on staircasing until ownership rises above 80%.
A market value election can avoid further SDLT on later staircasing, but whether it is appropriate depends on the transaction and buyer's circumstances.
A Shared Ownership resale is a fresh acquisition by the new buyer; the SDLT treatment should be considered for that purchaser's own transaction rather than assumed from the previous owner's historic election.
First-time buyer relief can also interact with the initial purchase.
Your conveyancer should advise on the tax treatment rather than relying on a generic online calculation.
What should I check before reserving?
Ask for the key information document and understand:
- full market value;
- percentage you will own;
- deposit required;
- estimated mortgage payment;
- initial rent;
- how rent can increase;
- current service charge;
- estate and management charges;
- reserve-fund contributions;
- repair responsibilities;
- whether an initial repair period applies;
- lease length;
- staircasing rules;
- maximum share you can eventually own;
- resale and nomination provisions.
Government guidance specifically tells buyers to use the key information document to understand costs and staircasing rights before reserving.
What should I check before exchange?
By exchange, you should understand not only whether the lender will grant the mortgage but whether the Shared Ownership structure works for you long term.
Your solicitor and mortgage adviser should have established:
- the final purchase share;
- deposit and mortgage;
- landlord or provider;
- rent and service charges;
- affordability;
- lender approval;
- lease compliance;
- Mortgage Protection Clause requirements;
- repair obligations;
- staircasing restrictions;
- resale restrictions;
- any SDLT decision.
Do not exchange simply because the initial mortgage payment looks attractive. The mortgage is only one part of the ownership structure.
Is Shared Ownership a good idea?
It can be a useful route into home ownership where buying a suitable property outright is not affordable.
Potential advantages include a smaller initial mortgage, a smaller deposit requirement, access to a property that may otherwise be unaffordable and the ability to buy more equity later where permitted.
The trade-offs matter. You still have a mortgage, rent, lease obligations, service or estate charges, repair exposure, and staircasing and resale rules.
Shared Ownership is therefore best understood as part ownership combined with a lease and an ongoing landlord relationship rather than as a discounted conventional purchase.
How can FG & Cook help?
Shared Ownership mortgages need to work at two levels.
First, the mortgage itself has to be affordable.
Second, the lender has to accept the particular Shared Ownership lease, share percentage, provider and property.
FG & Cook can assess the complete monthly cost - mortgage, rent and associated charges - against current lender criteria rather than looking only at the mortgage amount.
That can be particularly useful where the property has an unusual share percentage, substantial service charges, an older lease or plans for future staircasing.
The objective is to identify a lender and structure that fit the actual Shared Ownership purchase rather than treating it like an ordinary mortgage with a smaller loan.
Mortgage approval is never guaranteed and remains subject to full underwriting, valuation and legal-title requirements.
FG & Cook Financial Services Limited is an appointed representative of OSL Financial Services Limited, which is authorised and regulated by the Financial Conduct Authority under FRN 948512.
YOUR HOME MAY BE REPOSSESSED IF YOU DO NOT KEEP UP REPAYMENTS ON YOUR MORTGAGE.
This article is intended for general information only and does not constitute personalised mortgage, tax or legal advice. Shared Ownership terms and lender criteria vary.