Building Society Shared Ownership Mortgage Guide UK
A shared ownership mortgage lets you borrow against the share of a home you are buying rather than the property’s full market value. You then normally pay rent to a housing association, council or other scheme provider on the share you do not own.
The important detail is that Shared Ownership is not one identical UK-wide scheme. England, Wales, Scotland and Northern Ireland have different programmes, eligibility rules and ownership structures, and a building society that accepts one scheme may not accept another.
Independent editorial review: 27 September 2026. Mortgage rates and lender criteria can change quickly, so this guide focuses mainly on scheme structure and current lender eligibility rather than treating a temporary interest rate as permanent.
Shared Ownership Mortgage: Quick Answers
How a Shared Ownership Mortgage Works
In the standard England model, you buy a share of a home and the housing provider keeps the rest. Government guidance says the initial share can be between 10% and 75% of the property’s full market value, although many homes are still sold with starting shares between 25% and 75%.
You can fund your share with a combination of deposit and mortgage. You then pay rent on the percentage retained by the landlord and normally pay property-related charges under the lease.
You normally pay
- Your mortgage repayment.
- Rent on the unsold share.
- Service charge where applicable.
- Estate or management charges where applicable.
- Buildings-insurance costs through the relevant lease arrangement.
- Council Tax and normal household bills.
You normally own
- The share stated in your Shared Ownership lease.
- The right to occupy the whole home subject to the lease.
- The ability to sell your share under the lease rules.
- The ability to buy additional shares where staircasing is permitted.
Official England guideGOV.UK Shared Ownership Scheme
After opening this link:
- Read the section explaining how Shared Ownership works.
- Check the permitted initial-share range for the property you are considering.
- Open the eligibility section before reserving a home.
- Read the costs page for deposit, rent and service-charge information.
- Check the staircasing rules before assuming you can automatically buy 100% later.
Shared Ownership Rules Are Different Across the UK
The phrase “shared ownership mortgage UK” covers several different arrangements. Always tell a lender or broker exactly which national scheme and housing provider are involved.
Official WalesShared Ownership – Wales
After opening this link:
- Open the Overview section to understand how the Welsh scheme works.
- Check the current eligibility rules.
- Read how the initial share and repayment mortgage are structured.
- Use the application guidance rather than assuming England’s process applies.
Official ScotlandScottish Government Home-Buying Support
After opening this link:
- Identify whether you mean traditional Shared Ownership or a Shared Equity scheme.
- Open Open Market Shared Equity for eligible existing homes.
- Open New Supply Shared Equity for qualifying new-build homes.
- Check priority-group and local-area requirements before approaching a mortgage lender.
Northern IrelandCo-Ownership Northern Ireland
After opening this link:
- Confirm that you live in Northern Ireland and meet the current applicant criteria.
- Use the eligibility checker.
- Use the affordability calculator before choosing a property.
- Check the current list of mortgage lenders that accept Co-Ownership purchases.
Who Can Apply for Shared Ownership in England?
For England’s government Shared Ownership scheme, current eligibility includes an annual household income of £80,000 or less, or £90,000 or less in London, and being unable to afford the deposit and mortgage payments needed to buy a suitable home outright.
You must also fall into an eligible buyer situation. This can include being a first-time buyer, previously owning a home but being unable to afford one now, forming a new household after a relationship breakdown, moving from another Shared Ownership property, or needing to move from a home you currently own because you cannot afford a suitable replacement outright.
Official eligibilityCheck England Shared Ownership Eligibility
After opening this link:
- Check your household income against the London or non-London limit.
- Confirm why you cannot buy a suitable home outright.
- Check which eligible-buyer category applies to you.
- If you currently own a home, read the sale requirements carefully.
- Ask the housing provider whether the property has a local-connection condition.
How Much Deposit Do You Need for a Shared Ownership Mortgage?
The most common misunderstanding is calculating the deposit from the full property value. In England, government guidance says the deposit is usually 5% to 10% of the share you are buying.
Official costsGOV.UK Shared Ownership Costs
After opening this link:
- Check the deposit guidance for the share you intend to buy.
- Add solicitors’ fees and any applicable property tax.
- Write down the monthly rent and service charge from the property’s key information document.
- Check for estate charges, management fees and reserve-fund contributions.
- Budget beyond the deposit before paying a reservation fee.
Shared Ownership Monthly Cost: Mortgage + Rent + Charges
Affordability is based on the whole housing cost, not just the smaller mortgage. This is one reason a Shared Ownership property with a low-looking mortgage can still be unaffordable.
For a new-build Shared Ownership home in England, current government guidance says the initial rent on the landlord’s share cannot normally exceed 3% of that unsold equity, and many providers use 2.75%.
Building Societies Offering Shared Ownership Mortgages
Specialist building societies can be useful because they often publish detailed Shared Ownership criteria rather than treating the case exactly like a standard residential mortgage. Availability still depends on property location, lease wording, housing provider, income and the share being purchased.
Leeds Building Society Shared Ownership Mortgages
Leeds currently publishes a dedicated Shared Ownership mortgage range and specialist lending criteria. Its intermediary guidance says it can lend up to 95% LTV of the borrower’s share on qualifying new-build and resale properties.
Leeds also supports Shared Ownership remortgages, product transfers and additional borrowing in qualifying circumstances. Current criteria require the customer to be able to staircase to 100% ownership.
Official LeedsLeeds Shared Ownership Mortgage Range
After opening this link:
- Check the current maximum LTV of the share.
- Compare fee-paying and fee-free mortgage products.
- Check whether the product is for purchase, remortgage or an existing customer.
- Open the Shared Ownership criteria before treating a rate as available to your case.
- Ask your broker to check lease, housing-provider and property requirements.
Newbury Building Society Shared Ownership Mortgages
Newbury has a long-standing specialist Shared Ownership proposition for qualifying properties in England and Wales. It currently states that eligible borrowers can borrow up to 95% of the share they are purchasing.
Its current consumer criteria use a minimum 25% and maximum 75% ownership share for the initial Shared Ownership mortgage, with separate loan-size and location rules. Some London postcode restrictions can reduce the maximum lending percentage.
Official NewburyNewbury Shared Ownership Mortgages
After opening this link:
- Check the live Shared Ownership products before comparing rates.
- Confirm the maximum LTV of your purchased share.
- Check minimum and maximum mortgage amounts.
- Read the England/Wales and London location restrictions.
- If staircasing, use the existing-customer route rather than assuming a normal home-mover mortgage applies.
The Cambridge Building Society Shared Ownership Mortgages
The Cambridge currently offers dedicated Shared Ownership fixed and discounted-variable mortgage options. Its current consumer criteria allow qualifying Shared Ownership mortgages on properties in England and Wales.
The Cambridge states that the buyer’s property share must normally be between 25% and 75%, the purchase must be through a registered Housing Association and the lease must contain an acceptable Mortgage Protection Clause.
Official CambridgeThe Cambridge Shared Ownership Mortgages
After opening this link:
- Compare the live fixed and discounted-rate Shared Ownership options.
- Check the completion fee and any Early Repayment Charges.
- Confirm your proposed share falls within current criteria.
- Ask the housing association or solicitor to check the required Mortgage Protection Clause.
- Book a mortgage appointment if you want the Society to assess your case.
Principality Building Society Shared Ownership Mortgages
Principality currently supports qualifying Shared Ownership mortgages in Wales and England through its intermediary proposition. Its published criteria state lending of up to 95% of the share for customers planning to own between 25% and 75% of the property’s value.
This can make Principality relevant to buyers in Wales who want a mutual lender familiar with the local market, but the individual Shared Ownership scheme, lease and property still need to satisfy its mortgage criteria.
Official PrincipalityPrincipality Shared Ownership Criteria
After opening this link:
- Confirm whether the property is in an accepted England or Wales scheme.
- Check the permitted purchased-share range.
- Check the current maximum mortgage percentage of that share.
- Have your broker verify the housing-provider and lease conditions.
- Do not use the intermediary page as a substitute for a personalised mortgage illustration.
Shared Ownership Lease Checks Before You Apply
The lease can affect whether a lender will accept the property and how easy it will be to staircase, remortgage or sell later. Do not treat it as paperwork to read only after the mortgage is approved.
Staircasing: Buying More of Your Shared Ownership Home
Staircasing means purchasing additional equity from the housing provider. Your rent normally falls because the landlord owns a smaller percentage after the transaction.
In England, the minimum additional share depends on the lease and programme. Older leases can require 10% or even 25% increments. Some newer leases permit standard staircasing in 5% increments, while qualifying newer homes can also have a separate 1%-per-year option for the first 15 years.
Official staircasingGOV.UK Staircasing Rules
After opening this link:
- Check which staircasing model applies to the date and type of your lease.
- Ask the housing provider what minimum share can be purchased.
- Check whether a RICS valuation is required.
- Ask how long that valuation remains valid.
- Budget for legal and housing-provider administration costs.
- Check the maximum share permitted before arranging extra mortgage borrowing.
Can You Remortgage a Shared Ownership Property?
Yes, but your choice is normally narrower than for an ordinary residential mortgage. The new lender must accept Shared Ownership, the housing provider and the lease.
A remortgage can be used simply to move the existing mortgage balance, or in some cases to raise additional funds for staircasing. The housing provider’s consent may also be required.
Simple remortgage
- Mortgage remains against the same ownership share.
- Compare current lender product-transfer options first.
- Check Early Repayment Charges.
- Check valuation and legal costs.
- Confirm the new lender accepts the lease.
Remortgage + staircasing
- Borrowing increases to fund another share.
- Housing-provider staircasing process must be followed.
- A fresh property valuation is normally required.
- Rent changes after completion.
- Legal work may be more involved.
How to Apply for a Shared Ownership Mortgage
The property-scheme approval and mortgage application are connected but separate. Being approved by a housing association does not mean a mortgage lender has approved the borrowing.
- Check the national scheme. Confirm whether the property is under England Shared Ownership, Shared Ownership – Wales, a Scottish scheme or Northern Ireland Co-Ownership.
- Check scheme eligibility. Complete the housing-provider or scheme-provider affordability and eligibility process.
- Choose the share. Identify the share the provider will allow and what its purchase price is.
- Calculate the deposit. Work from the share being purchased, then check the mortgage lender’s maximum LTV of that share.
- Calculate total monthly housing cost. Include mortgage, rent, service charge, estate charge and other recurring costs.
- Check lender criteria. Confirm the lender accepts the scheme, provider, lease, property type and share.
- Obtain a mortgage assessment. Get a Decision in Principle or adviser assessment where appropriate.
- Reserve carefully. In England, a housing-provider reservation fee can be up to £500. Check when it is refundable before paying.
- Instruct an experienced conveyancer. Shared Ownership leases need careful legal review.
- Review the mortgage offer and lease together. Do not exchange contracts until your legal adviser confirms the purchase can proceed.
Official application processApply for Shared Ownership in England
After opening this link:
- Confirm eligibility first.
- Use the official search route to find eligible homes or contact the provider.
- Ask for the key information documents before reserving.
- Check the reservation-fee conditions.
- Choose a solicitor or licensed conveyancer who understands Shared Ownership leases.
Documents You May Need
Common Shared Ownership Mortgage Mistakes
Shared Ownership vs Buying 100% With a Normal Mortgage
Shared Ownership
- Smaller initial mortgage can be required.
- Deposit is based on the purchased share under standard scheme rules.
- Rent is payable on the unsold share.
- Service charges can apply.
- The property is subject to Shared Ownership lease conditions.
- Future staircasing can increase ownership.
- Lender choice can be narrower.
Buying 100%
- You finance the whole purchase price minus your deposit.
- No Shared Ownership rent is payable.
- Service charges can still apply to leasehold or managed developments.
- No housing-provider staircasing process.
- Wider mainstream mortgage choice may be available.
- A larger deposit and mortgage may be needed at the start.
Related Building-Society.org Guides
These existing society guides are useful when you want to understand lenders that currently participate in Shared Ownership or other specialist mortgage markets.
Official Shared Ownership Sources
Use these sources for the current scheme and lender rules. Mortgage products, rates, fees and eligibility can change after this page is reviewed.
Final Checks Before Reserving a Shared Ownership Home
Last reviewed 27 September 2026. Scheme rules and lender criteria were checked against current government and lender information. Live mortgage pricing should be verified again immediately before application.
Independent Mortgage Information Notice
Building-society.org is an independent informational website. It is not a housing association, Shared Ownership provider, mortgage lender, mortgage broker, Homes England, Welsh Government, Scottish Government or Northern Ireland Co-Ownership.
This guide provides general information rather than personalised financial or legal advice. Shared Ownership leases can contain material restrictions and costs, so use a suitable solicitor or licensed conveyancer and obtain regulated mortgage advice where appropriate.
Building Society Shared Ownership Mortgage FAQs
1. What is a Shared Ownership mortgage?
A Shared Ownership mortgage finances the share of a property you are buying through an eligible Shared Ownership scheme. You normally pay a deposit and mortgage on your share and rent to the housing provider on the share you do not own.
2. How much deposit do I need for Shared Ownership?
For the standard England scheme, the deposit is usually between 5% and 10% of the share you are buying. For example, if your share costs £100,000, a 5% deposit would be £5,000. Individual lender and national-scheme rules can differ.
3. Which building societies offer Shared Ownership mortgages?
Current specialist building-society lenders include Leeds Building Society, Newbury Building Society, The Cambridge and Principality, among others. Availability depends on the scheme, property, housing provider, share, location and applicant circumstances.
4. Can I get a 95% Shared Ownership mortgage?
Yes, some building societies currently lend up to 95% of the share being purchased on qualifying Shared Ownership cases. That means a deposit equal to 5% of your purchased share may be possible, but affordability and lender criteria still apply.
5. Do I pay rent as well as a Shared Ownership mortgage?
Yes. You normally pay the mortgage on the share you own and rent to the landlord or housing provider on the share you do not own. Service charges, estate charges and other lease costs can also apply.
6. Does Shared Ownership work the same way everywhere in the UK?
No. England, Wales, Scotland and Northern Ireland have different schemes and rules. Northern Ireland uses Co-Ownership, while Scotland also has Shared Equity schemes that work differently from standard part-buy part-rent Shared Ownership.
7. Can I buy more of my Shared Ownership property later?
Usually yes. Buying a larger share is known as staircasing. The permitted increment, valuation process, fees and maximum share depend on your lease and scheme. Some properties do not allow staircasing all the way to 100%.
8. Can I remortgage a Shared Ownership home?
Yes, if the new lender accepts the Shared Ownership scheme, housing provider, lease and property. You may also need housing-provider consent. Some remortgages are combined with staircasing to purchase an additional share.
9. Are Shared Ownership service charges based on the share I own?
Not necessarily. Service-charge liability depends on the lease and development. Shared owners can be responsible for service and maintenance charges even though they own only part of the home’s equity, so review the key information document and lease carefully.
10. Is Shared Ownership cheaper than buying a whole property?
It can reduce the initial deposit and mortgage required, but it is not automatically cheaper overall. Compare the mortgage, rent, service charges, future rent increases, staircasing costs and lease obligations with the cost of buying another suitable home outright.