Yes, it may be possible to buy a house with your mother and get a joint mortgage, provided the application meets a lender’s affordability and eligibility criteria.
Based on the incomes and deposit you have outlined, the case appears feasible on the face of it. However, the final outcome will depend on a number of factors, including affordability, credit history, the mortgage term available and how lenders view your mother’s age and retirement plans.
So while the figures look promising, the detail will still matter.
How Do Lenders Assess a Joint Mortgage with a Parent?
When you apply for a joint mortgage, lenders will usually look at both applicants’ income, spending, debts and credit history.
They will want to understand your combined financial position and whether the mortgage remains affordable not just today, but over the full term. If either of you has loans, credit commitments or other major outgoings, that can affect how much you may be able to borrow.
The lender will also consider the size of your deposit and the property value, as both will influence the loan to value and the products available.
Does Your Combined Income Support the Mortgage You Need?
On the figures provided, your combined income is £111,000 a year.
That may be enough to support borrowing in the price range you are considering, particularly with a £250,000 deposit behind you. A large deposit can strengthen the application, reduce the loan to value and often improve the range of mortgage products available.
That said, lenders do not all work to the same formula. The amount available can vary depending on income type, commitments, credit profile and the length of the mortgage term.
Will Your Mother’s Age Affect the Mortgage Term?
Potentially, yes.
Your mother’s age may influence the maximum mortgage term available, especially if the lender needs to rely on her income to support affordability. If she plans to retire in around 10 years, some lenders may want the mortgage to end by or not long after retirement, unless they are comfortable using expected pension income.
This can have a big effect on affordability because a shorter term means higher monthly repayments, even if the loan amount itself is manageable.
How Much Could the Monthly Mortgage Payments Be?
Monthly payments will depend on the amount you borrow, the mortgage rate and the term.
For example, a mortgage of £350,000 over 10 years would cost around £3,380 a month at 3%, £3,544 at 4% and £3,712 at 5%.
This shows why the mortgage term matters so much. Even where the borrowing looks affordable on paper, the monthly cost can rise quickly if the term is shortened because of one applicant’s age.
You can use our how much can I borrow calculator for a more tailored estimate based on your circumstances.
What Else Should You Consider Before Buying with a Parent?
It is important to think beyond the initial approval.
If the mortgage relies heavily on your mother’s income, you should also consider what would happen if her income stopped or reduced, or if one of you wanted to sell or move in future. If your own salary would not be enough to maintain the repayments alone, that is worth factoring in from the outset.
It is also sensible to consider protection, longer-term affordability and how ownership of the property will be structured.
Speak to John Charcol About Joint Mortgages with Family
Buying a house with your mother may well be possible, especially with a strong combined income and a sizeable deposit, but lender criteria and mortgage structure will make a real difference.
At John Charcol, our independent mortgage advisers can look at your circumstances, assess what may be affordable and help you find the most suitable joint mortgage option.
Call us on 023 8235 2300 for more information.


