Remortgaging with additional borrowing

Remortgaging with additional borrowing: raising extra funds while keeping your home mortgage

Remortgaging with additional borrowing is for homeowners who want to increase the amount they borrow against their property. This can be useful when you need money for home improvements, to consolidate debts, or to fund a one-off expense—without necessarily buying a new property.

In practice, “borrowing more” usually means one of two routes:

• A further advance (sometimes called additional borrowing with your existing lender)
• A full remortgage (switching your mortgage to a new deal, potentially with a higher borrowing amount)

Which route is most suitable depends on your current mortgage terms, your equity position, and whether the lender is comfortable with the purpose of the extra borrowing.

When remortgaging with additional borrowing is commonly used

Homeowners typically consider additional borrowing for reasons such as:

• Home improvements and renovations (kitchens, extensions, loft conversions)
• Debt consolidation (combining other debts into one monthly payment)
• Funding a major life event (for example, a wedding, relocation costs, or repairs)
• Freeing up equity for a planned project or expense
• Adding borrowing alongside a property purchase plan (where the mortgage structure needs to change)

The key point is that lenders will look at both affordability and loan-to-value (LTV), and they may treat certain purposes differently.

Further advance vs full remortgage: what’s the difference?

Understanding the difference between these options helps you avoid paying for unnecessary steps.

Further advance (additional borrowing with your existing lender)

A further advance is an increase to your mortgage balance with your current lender.

Typical benefits include:

• You may be able to avoid switching lenders
• The process can be simpler in some cases

However, it still depends on whether your lender will agree to the additional borrowing and whether you can meet their criteria for LTV and affordability.

Full remortgage (switching to a new mortgage deal)

A full remortgage involves ending your current mortgage deal (or part of it) and taking out a new mortgage—often with a higher borrowing amount.

This route may be suitable when:

• Your existing deal is nearing the end of its term
• You want to compare a wider range of rates and structures
• Your current lender’s further-advance terms aren’t competitive

A full remortgage can also be relevant if you need a different mortgage type or structure to support the borrowing you want.

How lenders assess remortgaging with additional borrowing

Even if you have equity in your home, lenders will still focus on three main areas.

1) Equity and loan-to-value (LTV)

LTV is the relationship between the mortgage amount and the property value. The higher the LTV, the more risk the lender is taking—so the available options and pricing may change.

Your LTV is influenced by:

• Your property value
• Your current mortgage balance
• The amount you want to borrow (including the additional borrowing)

2) Affordability (income vs outgoings)

Lenders will assess whether you can afford the new repayments based on:

• Your income (and how reliable it is)
• Your monthly commitments
• The proposed mortgage term and repayment structure

3) The purpose of the extra borrowing

The reason you want additional funds can matter. Some lenders may apply different limits or conditions depending on whether the borrowing is for home improvements, debt consolidation, or other purposes.

Common scenarios for borrowing more when you remortgage

Home improvements

Borrowing more for renovations is a frequent reason for remortgaging. Lenders will still require you to stay within their LTV limits and show that the repayments are affordable.

Debt consolidation

Consolidating debts into your mortgage can simplify monthly payments, but it’s not always the cheapest option. Lenders will consider affordability, and it’s important to compare the overall cost of the mortgage borrowing against what you’re currently paying.

Adding a second charge

If you have (or plan to have) a second charge on the property, the remortgage can be more complex. The new lender will need to understand the existing arrangement, and there may be additional legal work involved.

Freeing up equity

If you want to release equity, the lender will generally focus on LTV and affordability. The purpose of the borrowing can also be relevant.

Costs to consider when remortgaging with additional borrowing

Additional borrowing doesn’t remove the usual remortgage cost considerations. The exact costs depend on your current deal and the route you take.

Early repayment charges and exit costs

If you’re leaving a fixed rate deal early, you may face an early repayment charge or other exit costs. These can reduce or eliminate the benefit of switching, so it’s important to factor them into the decision.

Product fees and interest on fees

Some mortgages charge a product fee. If the fee is added to the loan amount, it can increase the total borrowing and the interest paid over time.

Valuation and legal fees

A lender will usually require a valuation before lending. Legal work is also typically needed for the mortgage completion and any changes to charges.

What the process usually looks like

While every case differs, the overall flow is often similar.

Step 1: Review your current mortgage position

This includes understanding:

• Whether you’re on a fixed or variable rate
• Any early repayment charges
• The remaining term and current repayment level

Step 2: Confirm how much you can borrow

This is driven by:

• Your property value and LTV
• Your income and outgoings
• The purpose of the additional borrowing

Step 3: Choose the most suitable route

Depending on your circumstances, this could be:

• A further advance with your existing lender
• A full remortgage to a new deal

Step 4: Application, valuation and legal work

Once the mortgage application is progressed, the lender will carry out the necessary checks and valuation, and solicitors will handle the legal side.

Step 5: Completion and drawdown of funds

After approval and completion, the additional funds are released according to the mortgage structure and lender process.

Credit and remortgaging: what to expect

Remortgaging itself doesn’t automatically damage your credit record, but the process can involve credit-related activity.

Things that can affect your credit profile include:

• Missed payments on your current mortgage
• Multiple new credit applications in a short period
• Any changes to your financial circumstances during the application process

Keeping repayments on track and managing applications carefully can help reduce avoidable complications.

Is remortgaging with additional borrowing always the right choice?

It can be a sensible option when the additional borrowing is affordable and the overall cost makes sense once fees and exit charges are considered.

It may be less suitable when:

• Early repayment charges are high
• The additional borrowing pushes LTV to a level that significantly reduces available options
• The purpose of the borrowing doesn’t justify the long-term increase in mortgage debt

A careful comparison of the total costs—rather than focusing only on the headline rate—helps ensure the decision is based on the full picture.

Key questions to consider before you proceed

• How much additional borrowing do you actually need?
• What is your current LTV and how will it change?
• Will the route you choose involve early repayment charges?
• Are the new repayments affordable across the full term?
• Does the purpose of the borrowing fit the lender’s approach?
• What fees apply (product fees, legal fees, valuation)?

Summary

Remortgaging with additional borrowing can help you access extra funds secured against your property—often for improvements, debt consolidation, or planned expenses. The most important factors are usually LTV, affordability, and the route you take (further advance vs full remortgage). Costs such as early repayment charges, product fees and legal fees can significantly affect whether the plan is cost-effective.

By understanding how lenders assess additional borrowing and planning around fees and timing, you can make the process clearer and better aligned to your goals.