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Moving House Mortgages

When you move home you can port your current mortgage, switch to a new deal or borrow more, with the right choice depending on your circumstances.

Rated 4.97 out of 5 from 2,400+ reviews

Couple carrying an armchair into a room filled with moving boxes in a new home

Key Takeaways:

When moving house, you can port your existing mortgage to retain your current rate and avoid early repayment charges, take out a new whole-of-market mortgage for greater flexibility, or borrow additional funds through a top-up arrangement — with the most suitable choice depending on your rate, remaining term, and borrowing needs. Private Finance provides independent, whole-of-market advice across all three pathways, drawing on access to over 300 lenders and more than two decades of specialist experience to ensure your mortgage strategy is fully optimised for your move.

Moving House Mortgages: Your Options Explained

Moving home is one of the most significant financial decisions most people will ever make, and getting your mortgage strategy planned from the outset can save you a considerable sum.

Whether you are upsizing to accommodate a growing family, downsizing to release equity, or simply relocating, understanding how to handle your existing mortgage is just as important as finding the right property. The options available to you will depend on your current deal, your lender’s policies, and the broader market conditions at the time of your move — which is why independent, whole-of-market advice is so valuable.

Your Three Core Mortgage Options When Moving:

When you decide to move home, there are three primary routes available to you: porting your existing mortgage, taking out a new mortgage entirely, or borrowing additional funds on top of your current arrangement. Each pathway suits different circumstances, and in some cases a combination of approaches may deliver the desired outcome.

Porting Your Existing Mortgage

Porting means transferring your current mortgage deal — including its interest rate and terms — to your new property. This is particularly valuable if you secured a competitive rate during a period of lower interest rates that is no longer available in today’s market. By porting, you avoid the early repayment charges (ERCs) that would otherwise apply for exiting a fixed-rate deal before its end date, charges which can run to several thousand pounds depending on your outstanding balance.
Not every mortgage is portable, however, and even where porting is permitted in principle, you will still be subject to a fresh affordability assessment by your existing lender. You remain tied to that lender for the duration of the term, and standard transaction costs — valuation fees, legal fees, and Stamp Duty — still apply. Working with an experienced broker significantly accelerates the process; Private Finance’s established relationships with lenders mean porting can often be completed far more quickly than going directly.

Taking Out a New Mortgage

If your mortgage is not portable, or if current market rates represent a genuine improvement on your existing deal, moving to a new mortgage product gives you access to the full breadth of the market. This approach offers maximum flexibility: you repay your existing mortgage from the proceeds of your property sale, and your broker can source the most competitive terms available across all lenders. It is worth noting that if you exit a fixed-rate product before its end date, early repayment charges will apply — so timing your move relative to your current deal’s maturity date can make a meaningful difference to your overall costs.

As an independent, whole-of-market broker, Private Finance works with over 300 lenders, including high-street banks, private banks, and specialist providers whose products are not available on comparison websites or through direct channels. This breadth of access means we can identify rates and structures that simply would not be visible to borrowers approaching lenders independently.

Borrowing More When Moving to a More Expensive Property

Upsizing almost always requires additional borrowing. There are two ways to approach this: porting your existing mortgage and adding a separate top-up product for the additional amount, or repaying your current mortgage in full and taking out a new, larger loan. Each carries different implications. When you port and top up, your original mortgage retains its existing rate, but the additional borrowing is placed on a separate product that may mature at a different time — creating what is known as a blended rate arrangement that requires careful management going forward. A single new mortgage, by contrast, simplifies things into one product, one payment, and one maturity date, though early repayment charges on your existing deal would need to be factored into the decision.

Your home may be repossessed if you do not keep up repayments on your mortgage.

Moving Home Mortgage Solutions

Independent mortgage advice tailored to every stage of your move, from porting your existing deal to unlocking the whole market.

Porting Your Existing Deal

Keep your current interest rate and avoid costly early repayment charges by transferring your mortgage to your new property seamlessly.

Whole-of-Market Lender Access

We work with over 300 lenders — including private banks and specialist providers — to find rates unavailable on the high street or comparison sites.

Managing Costs & Charges

From early repayment charges to Stamp Duty, we model the full cost picture so you can make a fully informed decision before committing.

Expert Broker Support

With over two decades of experience and a 4.97/5 client rating, our consultants handle every aspect of your mortgage from enquiry to completion.

Downsizing to a Smaller, More Manageable Property

Downsizing presents its own set of considerations. You may wish to port your mortgage at a reduced loan size, in which case the lender will reassess your eligibility in line with their current criteria. Alternatively, you may choose to repay your existing mortgage entirely from the sale proceeds and either take out a smaller new mortgage or purchase outright.
If you are porting to a lower loan amount within a fixed-rate period, be aware that some lenders apply proportional early repayment charges to the portion of the loan being repaid — it is essential to understand this before committing to a course of action.

Understanding Early Repayment Charges and Moving Costs

Early repayment charges represent one of the most significant cost factors when moving during a fixed-rate period. Typically ranging from 1% to 5% of the outstanding mortgage balance, these fees exist to compensate lenders for lost interest income. On a £250,000 mortgage, a 2% ERC equates to £5,000 — a sum that frequently makes porting the more economical choice even when slightly better rates are available elsewhere. Your broker will model both scenarios and present a clear cost comparison before you commit.
Beyond early repayment charges, budgeting for a property move should account for arrangement fees (which vary by product), valuation fees, legal costs, and Stamp Duty Land Tax. For current Stamp Duty thresholds, HMRC’s official guidance provides the most up-to-date rates.

Why Private Finance for Your Moving House Mortgage

The mortgage market contains thousands of products across hundreds of lenders, each with distinct eligibility criteria, rate structures, and underwriting approaches. Private Finance’s role is to navigate this complexity on your behalf, drawing on whole-of-market access and over two decades of specialist experience to identify the optimal solution for your circumstances. Our average rating of 4.97 out of 5 from more than 2,000 client reviews reflects the level of service and expertise we bring to every case. We work closely with wealth advisers and accountants to ensure your mortgage sits coherently within your broader financial picture — a level of integrated advice that no single lender can offer.

Whether you are porting a deal, remortgaging, or structuring a complex top-up arrangement, getting guidance early can save you thousands and remove the administrative burden that moving home inevitably brings.

Your home may be repossessed if you do not keep up repayments on your mortgage.

How Much Can I Borrow?

The amount you can borrow will depend on factors such as your income, monthly commitments, credit history, deposit size, and overall affordability. 

While many lenders use income multiples as a guide, each lender assesses applications differently. Our mortgage calculators can give you an initial estimate, and our brokers can help you understand what may realistically be available based on your individual circumstances.

Get a Decision In Principle

A Decision in Principle (DIP) gives you an indication of how much you may be able to borrow before you start viewing properties. It can strengthen your position when making an offer, show estate agents and sellers that you’re a serious buyer, and help you search with greater confidence and clarity around your budget.

Our Proven Process

Frequently Asked Questions

Most mortgages include a portability clause, but this is subject to your lender’s approval and a fresh affordability assessment. Not all lenders permit porting, so it is important to check your mortgage terms early in the moving process.

If you are not porting, your existing mortgage is typically repaid from the proceeds of the property sale on completion day. Any outstanding early repayment charges will be deducted at that point if you are still within a fixed-rate period.
Early repayment charges (ERCs) are fees levied by lenders when you repay a fixed-rate mortgage before the end of its agreed term. They typically range from 1% to 5% of your outstanding loan balance and can amount to several thousand pounds.
This depends on the gap between your existing rate and available market rates, the size of any early repayment charge you would face, and how much you need to borrow. A broker can model both scenarios and present a clear cost comparison for your specific situation.
Yes. If you are moving to a more expensive property, you can port your existing mortgage and apply for additional borrowing on a separate product. The two products may have different rates and maturity dates, so careful planning is advisable.
The timeline varies by lender, but working through a broker with established lender relationships typically accelerates the process significantly compared with approaching your lender directly. In straightforward cases, porting can be arranged within a few weeks.
Even when porting, lenders conduct a fresh affordability assessment based on your current income, expenditure, and credit profile. If your circumstances have changed significantly — for example, you are now self-employed or have a different income — your application will be assessed accordingly.
No. Moving house gives you the opportunity to reassess the market entirely. If your current deal is no longer competitive or your lender’s products do not meet your needs, you are free to remortgage with a new provider, subject to any early repayment charges.
In addition to any early repayment charges, budget for arrangement fees, valuation fees, solicitor or conveyancing costs, and Stamp Duty Land Tax. The exact amounts will depend on your transaction and the products you choose.

Yes. Private Finance specialises in cases that fall outside mainstream lending criteria, including self-employed borrowers, high-net-worth individuals, those with complex income structures, and clients requiring large loans. Our whole-of-market access includes specialist and private bank lenders equipped for these circumstances.

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