It is usually possible to take a second mortgage to buy a home for elderly parents, but it isn’t a single “scheme” that you apply to. It’s more a question of which lenders are comfortable with the set-up and whether your income supports both properties.
How lenders view a “home for dependent relatives”
Most lenders will start with the same two questions.
Who will live there, and will they pay rent?
If your parents will live there and it’s purely for family use, some lenders will treat it more like a second residential purchase for a dependent relative. If any rent is involved, or it starts to look like a letting arrangement, the lender may treat it as a regulated / family letting scenario, which narrows the lender pool.
Can you afford two mortgages at the same time?
This is usually the biggest hurdle. Lenders will look at your existing mortgage and commitments, and then test the new mortgage on top.
Affordability: why different lenders give different answers
Lenders tend to assess this in one of two ways:
- Some effectively combine the total borrowing (your current mortgage plus the new one) and apply their affordability model to the total.
- Others treat your current mortgage payment as a monthly commitment, then assess what you can borrow for the new purchase based on what’s left.
In practice, you can sometimes borrow more with lenders who use the second approach, but it depends on your wider outgoings and how their stress testing is set.
What deposit you may need
In most cases you should expect a larger deposit than a straightforward residential purchase, particularly if you want interest-only.
A typical starting point is around 20–25% deposit, but it can be higher depending on:
- your current mortgage and other commitments
- the property type and location
- whether the case is treated as family-use or regulated letting
- the repayment plan for an interest-only mortgage
If your deposit is tight, one route can be to raise additional funds against your own home, but that needs careful affordability checking.
Interest-only terms: what to expect
Interest-only is possible in the right case, but lenders are stricter than they used to be. They will focus on two things:
1) Your repayment vehicle
You’ll need a credible plan to repay the capital at the end of the term. Common examples include downsizing, sale of investments, pension lump sum, or the planned sale of the property. “I’ll sort it later” generally won’t wash.
2) Loan-to-value limits
Interest-only is typically more conservative than repayment lending. Some lenders will only offer interest-only at lower LTVs unless the repayment vehicle is strong and clearly evidenced. That’s why you’ll sometimes see higher deposit expectations on interest-only.
Costs and practical points people miss
- Stamp Duty: because you already own a property, buying another one can trigger the higher rate of Stamp Duty for additional properties, depending on your circumstances.
- Future flexibility: think about what happens if your parents later need care, want to move, or if you need to sell.
- Family clarity: it’s sensible to document expectations (even informally) around bills, upkeep, and what happens long term.
Next step
These cases are very lender-specific, and the “right” answer often comes down to how the application is presented and which lender’s affordability model fits your situation best.
If you’d like to run through it properly, call 080 8280 6197 and we’ll arrange a time for one of our consultants to take the details and outline realistic options, including whether interest-only is viable and what deposit/term structure would be needed.
