Independent Legal Advice for Joint Borrower Sole Proprietor (JBSP) Mortgages
A joint borrower sole proprietor (JBSP) mortgage lets someone, usually a parent, join a home buyer’s mortgage without becoming an owner. Lenders almost always require that joint borrower to receive independent legal advice (ILA) first.
JBSP Independent Legal Advice in London
A joint borrower sole proprietor (JBSP) mortgage lets someone, usually a parent, join a home buyer’s mortgage to boost affordability without becoming an owner of the property. Because the joint borrower takes on the full debt but gets no share of the home, almost every lender insists they receive independent legal advice (ILA) before completion.
Adam Bernard Solicitors gives independent legal advice to joint borrowers across London from our High Holborn and Upton Park offices, and by video for clients elsewhere in England and Wales. We explain exactly what you are signing, check the lender’s requirements, sign the ILA certificate and, where needed, draft the declaration of trust that protects everyone. Call 0207 100 2525 to book an appointment.
What is a JBSP mortgage?
In a JBSP mortgage, two or more people are named on the mortgage, but only one of them, the sole proprietor, is registered as the owner at HM Land Registry. The others are joint borrowers: they help the owner pass the lender’s affordability checks and share responsibility for the repayments.
JBSP mortgages are also called “booster” or “family-assisted” mortgages. Lenders set their own rules on who can be a joint borrower, and many limit it to close family, such as parents or grandparents.
Common situations we advise on include:
- A parent joining an adult child’s mortgage so the child can buy their first home
- A grandparent helping a grandchild who earns too little to borrow enough alone
- A partner who already owns a property supporting the other partner’s purchase
How is a JBSP mortgage different from a joint or guarantor mortgage?
The difference is ownership: on a standard joint mortgage every borrower is also an owner, while on a JBSP mortgage only the proprietor owns the property.
| Joint mortgage | JBSP mortgage | Guarantor mortgage | |
|---|---|---|---|
| Named on the mortgage | All borrowers | All borrowers | Buyer only |
| Registered owner(s) | All borrowers | Sole proprietor only | Buyer |
| Liable for the full debt | Yes, all | Yes, all | Guarantor if buyer defaults |
| Helper gets a share of the home | Yes | No (if documented) | No |
| ILA usually required for the helper | Sometimes | Yes | Yes |
HM Land Registry explains that the legal title to land can be held separately from the underlying beneficial ownership (HM Land Registry, Practice guide 24: private trusts of land). A JBSP mortgage relies on that separation, which is why the paperwork matters.
Why do you need independent legal advice for a JBSP mortgage?
Lenders require ILA because the joint borrower carries all the risk of the debt and none of the benefit of ownership. The lender wants written proof from a solicitor that you understood that, and that nobody pressured you into signing.
The legal standard comes from the House of Lords decision in Royal Bank of Scotland v Etridge (No 2) [2001] UKHL 44, which set out the steps lenders and solicitors must take when someone agrees to a loan that benefits another person. Without proper advice, the lender’s security could later be challenged.
As a joint borrower you will be:
- Jointly and severally liable, meaning the lender can pursue you for the whole mortgage, not just a share, if the payments stop
- At risk of court action and a damaged credit record if the account falls into arrears (GOV.UK: repossession)
- Showing the mortgage on your own credit file, which can limit your future borrowing
- Without an automatic right to live in, sell or receive money from the property
Our ILA service sits within our wider independent legal advice solicitors practice, which also covers occupier’s consent, transfers of equity and equity release.
How does the ILA appointment work?
A JBSP ILA appointment is a private meeting between you and a solicitor, held in person or by video where your lender allows it, that ends with the solicitor signing the certificate your lender needs.
- Check the lender’s instructions. We confirm what the lender needs, whether video advice is accepted, and whether the adviser must be at a separate firm from the owner’s conveyancer.
- Review the documents. We go through the mortgage offer, the term, the interest rate, the monthly payment and any declaration of trust.
- Meet you alone. The owner-borrower is not in the room or on the call. We confirm your identity and that you understand English well enough, or arrange an interpreter.
- Explain the risks. We cover your liability for the full debt, what happens on default, death, sale or relationship breakdown, and how you could leave the mortgage.
- Confirm free consent. We check that you are acting voluntarily and can afford the payments if the owner cannot.
- Sign the ILA certificate. Once you confirm you wish to proceed, we sign and send the certificate (or solicitor’s letter) to the lender or conveyancer.
Our current prices are on our independent legal advice fees page.
What is a declaration of no beneficial interest?
A declaration of no beneficial interest is a signed document, usually a deed of trust, in which the joint borrower confirms they own no share of the property despite being on the mortgage.
Under section 53(1)(b) of the Law of Property Act 1925, a declaration of trust over land must be evidenced in writing and signed. A well-drafted deed records:
- That the proprietor owns 100% of the beneficial interest, or any agreed share if that is the intention
- Who pays the mortgage and what happens if one party stops paying
- How the joint borrower can give notice to leave, and how long the owner has to remortgage or sell
- Whether any money the joint borrower puts in is a gift or a loan
If the joint borrower is meant to have a share, the deed should say so instead. Couples buying together may also want a cohabitation agreement.
Does a JBSP mortgage affect stamp duty?
Stamp Duty Land Tax (SDLT) is charged on the people who acquire an interest in the property, so a joint borrower with no beneficial interest is not usually treated as a purchaser. This can matter a great deal.
On GOV.UK’s current rates, first-time buyers pay no SDLT on the first £300,000 of a home costing up to £500,000, but every purchaser must be a first-time buyer (GOV.UK: residential property rates). Since 31 October 2024, buying an additional residential property attracts rates 5 percentage points higher, and if any one joint purchaser already owns a home the higher rates can apply to the whole price (GOV.UK: buying an additional residential property; Finance Act 2003, Schedule 4ZA).
A JBSP structure can therefore keep a parent’s own home out of the calculation. It only works if the joint borrower genuinely has no beneficial interest: if they contribute money expecting a share, HMRC can look through the arrangement. Spouses and civil partners who live together are generally treated as one unit for the higher rates, so a JBSP mortgage between them does not avoid the surcharge. SDLT applies in England and Northern Ireland; Wales and Scotland have separate taxes.
We flag the SDLT position during your ILA, but the proprietor’s conveyancer files the return.
How does a joint borrower leave a JBSP mortgage?
A joint borrower leaves a JBSP mortgage when the owner remortgages into their sole name, the lender agrees to release them, or the property is sold.
- Remortgage: the owner borrows alone once their income allows. This is the most common route.
- Lender release: some lenders will remove a borrower by deed of release, but only if the owner passes affordability on their own.
- Sale: the mortgage is paid off from the sale price.
- Becoming an owner: if the joint borrower is to take a share later, the title can be changed by a transfer of equity.
A joint borrower with no beneficial interest has very limited power to force a sale. Court applications under section 14 of the Trusts of Land and Appointment of Trustees Act 1996 are open to trustees and people with an interest in the property, which a JBSP joint borrower usually is not. That is why the exit terms belong in the deed of trust from day one.
Do you need a JBSP mortgage broker or a solicitor?
You usually need both: a mortgage broker finds a lender that offers JBSP mortgages, and a solicitor gives the joint borrower independent legal advice and handles the legal side. We are solicitors, not brokers, so we do not arrange mortgages.
Once your broker has a mortgage offer in place, we can give the joint borrower’s ILA, draft the declaration of trust and, if you instruct us, act on the property purchase through our conveyancing solicitors. If anyone aged 17 or over will live in the property without being on the mortgage, the lender may also need an occupier’s consent form signed.
Why choose Adam Bernard Solicitors for JBSP independent legal advice?
Adam Bernard Solicitors is an SRA-regulated London law firm with 15 years in practice and more than 15,000 clients served, with CQS-accredited residential conveyancing and an active ILA practice.
- Two London offices: High Holborn (Central London) and Upton Park (East London), plus video appointments by Zoom, Teams, WhatsApp or Skype where your lender accepts them
- Joined-up advice: ILA, declaration of trust, SDLT position and conveyancing under one roof
- Clear certificates: we prepare the ILA certificate in the form your lender asks for, which helps avoid delays at completion
Read more about our work on mortgage lender panels. First-time buyers using a family-assisted mortgage may also find our First Home Scheme guide useful.
Book your JBSP independent legal advice: call 0207 100 2525, available 24/7, or contact us online to book an ILA appointment at our High Holborn or Upton Park office, or by video.
This page is for general information only and does not constitute legal advice.
JBSP Independent Legal Advice FAQs
What does JBSP stand for?
JBSP stands for joint borrower sole proprietor. It is a mortgage where two or more people borrow together but only one of them is registered as the owner of the property.
Is independent legal advice a legal requirement for a JBSP mortgage?
ILA is not required by statute, but almost every lender makes it a condition of a JBSP mortgage offer. Without the signed ILA certificate, the lender will not release the funds.
Can my own conveyancer give the joint borrower ILA?
Usually not. Most lenders require the joint borrower's adviser to be independent of the owner's conveyancer, and some require a separate firm. We check your lender's instructions before booking.
Can JBSP independent legal advice be given by video?
Yes, if your lender permits it. We offer video ILA by Zoom, Teams, WhatsApp or Skype, and in person at our High Holborn and Upton Park offices.
Will I own any of the property as a joint borrower?
No, not if a declaration of no beneficial interest is signed. You will be liable for the mortgage but will have no share in the property, its rent or its sale proceeds unless the deed says otherwise.
Does a JBSP mortgage avoid the stamp duty surcharge?
It can, because SDLT is charged on people who acquire a beneficial interest, and a properly documented joint borrower acquires none. It does not work between spouses or civil partners who live together, or where the joint borrower is really buying a share.
What happens if the owner stops paying the mortgage?
The lender can ask the joint borrower to pay the whole amount, because liability is joint and several. Continued arrears can lead to repossession and will affect both borrowers' credit records.
How do I come off a JBSP mortgage?
The owner remortgages into their sole name, the lender agrees to release you, or the property is sold. Exit terms should be agreed in the deed of trust before completion.
How much does JBSP independent legal advice cost?
Prices depend on the lender's requirements and whether we also draft the declaration of trust. Current fees are on our independent legal advice fees page, or call 0207 100 2525.
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