Mortgage guide
Joint borrower sole proprieter
A Joint Borrower Sole Proprietor (JBSP) Right to Buy mortgage is a specialist solution for tenants who are eligible to purchase their council or housing association home under the Right to Buy scheme but need additional income to meet affordability requirements.
Joint borrower sole proprieter
Joint Borrower Sole Proprietor Right to Buy mortgages
A Joint Borrower Sole Proprietor (JBSP) Right to Buy mortgage is a specialist solution for tenants who are eligible to purchase their council or housing association home under the Right to Buy scheme but need additional income to meet affordability requirements. This structure allows a close family member, such as a parent, adult child, or sibling, to be added to the mortgage as a joint borrower without being named on the property’s legal title.
Under a JBSP Right to Buy mortgage, the property remains solely in the name of the eligible tenant, preserving their Right to Buy entitlement and ensuring the statutory discount is applied correctly. Because the additional borrower is not added to the deeds, this structure avoids complications around ownership, does not dilute the Right to Buy discount, and can help prevent additional stamp duty implications that may arise with joint ownership.
JBSP Right to Buy mortgages are particularly valuable for tenants on lower incomes, those receiving benefits, or applicants whose sole income would not be sufficient to secure the required loan amount. Lenders offering Right to Buy JBSP mortgages in the UK assess affordability using the combined income of all borrowers, which may include employed income, self-employed earnings, pension income, and, in some cases, benefits income from the main tenant.
This type of mortgage can also be suitable for first-time buyers purchasing through Right to Buy who are unable to qualify on their own but have family support available. By combining incomes while keeping ownership with the tenant, a Joint Borrower Sole Proprietor Right to Buy mortgage provides a practical and compliant route into homeownership. With specialist guidance, the application can be structured to align with lender criteria, Right to Buy scheme rules, and FCA-regulated affordability standards, ensuring a smooth progression from eligibility through to completion.
Residential mortgage calculator
Right to Buy mortgage criteria
For context, these are the wider product terms covered by this guide. Availability and eligibility depend on your circumstances and the lender.
| Criteria | Detail |
|---|---|
| Maximum loan | Up to 100% of the discounted price with lenders that accept Right to Buy, capped against market value (published caps checked September 2026: 75% to 95%) |
| Deposit types | Right to Buy discount, family gift, savings |
| Loan to income ratios (max) | In our experience 5 times gross annual income is the standard multiple, up to 6 for professionals and specialist products; each lender's affordability assessment decides the actual figure |
| Income types | Employed, self-employed, contractors, property income, trust income and investment income, depending on the lender |
| Repayment type | Capital repayment, interest only or part and part, depending on the lender |
| Term | Up to 40 years in our experience, depending on the lender and your age |
| Valuations available | The lender's own valuation: automated valuation or physical valuation (bricks and mortar), at the lender's choice |
| Adverse credit | Some lenders consider missed payments, defaults, CCJs, IVAs, previous bankruptcy or company liquidations, depending on how recent and serious they are |
| Locations | England, and Northern Ireland through the Housing Executive House Sales Scheme. Right to Buy has ended in Wales and Scotland. |
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Frequently asked questions
What is a joint borrower sole proprietor mortgage?
A joint borrower sole proprietor (JBSP) mortgage adds a family member to the mortgage as a joint borrower without adding them to the title, so their income supports affordability while only the buyer owns the property. The supporting borrower is jointly liable for the loan and must take independent legal advice.
Does a joint borrower sole proprietor mortgage affect stamp duty?
A joint borrower sole proprietor mortgage does not trigger the additional-dwelling stamp duty surcharge, because the supporting borrower owns no share of the property. The buyer keeps first-time buyer Stamp Duty Land Tax relief where they qualify, which putting a parent on the title as a co-owner would remove.
Can I use a Joint Borrower Sole Proprietor mortgage on a £50,000 salary?
A Joint Borrower Sole Proprietor (JBSP) mortgage lets a £50,000 earner add a family member's income to the application while remaining the sole legal owner of the property. The supporting borrower shares responsibility for repayments but holds no ownership stake. A JBSP arrangement can raise the amount a single applicant borrows.
Can I get a joint borrower sole proprietor mortgage on a high value home?
Yes, joint borrower sole proprietor mortgages are available on high value homes from some lenders. A joint borrower sole proprietor mortgage allows a family member's income to support the loan without that family member being named on the property title, which can help buyers afford larger borrowing.
Who is the borrower on a SIPP or SSAS mortgage?
The borrower is the pension scheme, acting through its trustees: the member trustees of a small self-administered scheme (SSAS), sometimes with a professional trustee alongside them, or the trustee of a self-invested personal pension (SIPP), usually a company connected with the provider. The member and their business do not borrow. The lender looks to the property, the lease and the rent, and to the scheme's other assets, for repayment, and it asks to see the scheme's trust deed and rules and the administrator's or provider's consent.
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