How I Used Refinancing to Build a £3.5 Million Property Portfolio
September 18, 2026
I’ve built a UK property portfolio worth more than £3.5 million, with around £2 million of mortgage debt. Over time, I’ve recovered the original capital I contributed and more, while continuing to own the rental properties. Refinancing has been a major part of how that happened.
Those numbers need explaining properly. The properties haven’t become debt-free, and money released through a mortgage isn’t the same as profit from a sale. At those approximate valuations and debt levels, there is roughly £1.5 million of equity in the portfolio. I still owe the mortgages, and the rental income still has to support them.
The interesting part is how I got there. It began with one house I could live in, some spare rooms and a willingness to learn from someone who saw opportunities differently. This is my own experience across around 15 years, rather than a promise that today’s investor will get the same result on the same timetable.
You can also watch the full story of my property portfolio on YouTube.
The £10,000 opportunity I was too frightened to take
In 2009, I was running a recruitment agency in Canada Water. One of my clients, Peter, was already a wealthy property investor. He had been putting business profits into London property, and I was renting a room from him in one of his apartments.
He told me about a developer struggling to sell off-plan units. The idea involved a £10,000 deposit on each property, negotiating a discount as a group and potentially selling before completion as the market recovered. I found plenty of reasons not to get involved.
I told myself it was too risky, the market was too far down and I didn’t have enough capital. In reality, I could have raised money, including by selling a car that was worth roughly £20,000 to £30,000. Fear of losing it outweighed my willingness to understand the opportunity.
As I recall in the video, the people involved went on to make around £80,000 for each £10,000 committed in under two years. That was their outcome on that particular project, not mine. I wasn’t part of it, and I wouldn’t use that result as a normal expectation for an off-plan investment today.
What changed me was watching an opportunity I’d dismissed work out for people I knew. I needed to assess the detail and the risks, rather than letting unfamiliarity make the decision for me. That was the lesson I took into my next conversation with Peter.
My first London house cost £176,500
A year later, I had a more concrete plan. I wanted a three-bedroom house in London’s outer zones where I could afford to live in one room and let the spare rooms. I was already renting a room, so the living arrangement itself wasn’t a huge leap.
My thinking was that the room income could help cover the mortgage and bills. The excess, alongside money I no longer paid in rent to Peter, could help me save towards another purchase. I was trying to turn my existing position into a starting point for something bigger.
Peter’s improvement to the plan was to look for a discount, particularly repossessions in the depressed market. I found a fairly modern house, built in 1999, advertised at £200,000. I offered £160,000, negotiated for about a week and eventually agreed £176,500 in 2010.
In the video I put its current value at around £450,000 to £500,000. That is a present estimate after a long holding period. It doesn’t mean I could have withdrawn the entire increase in cash, or that all of it would remain after a hypothetical sale and its costs.
The purchase showed me how useful a different perspective could be. I’d started looking for an affordable home. I was now looking at how the price, room income and future options could fit together. My separate guide to buying property below market value explains that principle in more detail.
Moving to Didcot and keeping the first property
Living in the London house and renting the spare rooms helped me build savings. The house also increased in value on paper. Around 2015, savings and refinancing helped me move towards a £400,000 family-home purchase in Didcot, with roughly £120,000 of my money going into that stage of the plan.
I needed to be closer to a taxi business I’d bought into. When I moved out of the London property, I obtained consent to let from the lender. That was how I handled my particular mortgage at the time; permission and conditions depend on the lender, so it isn’t something to assume automatically today.
The Didcot purchase also involved an opportunity I thought was mispriced. Comparing completed homes with off-plan alternatives, I believed there was a gap between the purchase price and what the finished house would be worth. I committed a 10% deposit, or £40,000.
By completion around 18 months later, I estimated the £400,000 house was worth about £450,000. That £50,000 uplift was significant relative to the deposit. It also illustrates leverage: a change in the value of the whole property can be large relative to the initial cash committed. That relationship works in both directions if values fall.
Releasing equity helped fund the next purchase
In 2017, I refinanced the London and Didcot properties and released around £100,000 between them. I used that money towards another property, this time a four-bedroom house that I turned into a five-bedroom HMO.
I bought it for about £375,000 and estimated its value at roughly £425,000 by completion. The room rents totalled £3,500 a month, while the mortgage was around £900. There were bills and other costs between those two numbers, so the difference wasn’t all profit, but the cash flow was attractive to me.
That combination kept coming up: look for an advantage on the purchase, make sure the income works, then give the property time. When increased value and lending conditions allowed, refinancing could release capital for a later purchase.
I wasn’t starting from a fresh deposit saved entirely from wages every time. Existing assets were beginning to help fund the next step. However, the released money came with debt attached. It was useful precisely because I could put it to work again while keeping the property, but the borrowing still needed to be supported.
How the refinancing calculation works
Here’s a simplified illustration of the mechanism, rather than another claim about one of my own transactions. Suppose a rental is valued at £200,000 and has a £100,000 mortgage. If a lender were prepared to lend 75% of the accepted value, the new loan would be £150,000.
Repaying the existing £100,000 balance would leave £50,000 before fees and any other deductions. The investor would still own the property, but would now owe £150,000 instead of £100,000. There would be £50,000 of equity left against that £200,000 valuation.
The amount available depends on the lender’s valuation and lending assessment, not simply the owner’s preferred estimate. The rental income and the cost of the new debt also matter. If the lender offers less, or the higher payment makes the property uncomfortable to hold, the intended release may not be sensible or available.
Tax treatment of additional borrowing needs separate attention too. HMRC’s rental-income guidance explains that the use of extra borrowing and applicable finance-cost restrictions affect relief. Getting money out and knowing how the interest is treated are different questions.
Expanding beyond the first area
As Didcot prices stretched what I could afford with my available capital, I looked elsewhere. Over the next three years, I bought another ten properties, including HMOs, flats and single-family homes, across places such as Sheffield, Kettering, Wellingborough and Corby.
The properties weren’t identical, but I was looking for a similar advantage in each purchase. I wanted a discount and enough income to make holding the asset worthwhile. My ambition was to release substantial capital after a couple of years and recover the original contribution over a longer period.
Those were investment aims, not guaranteed refinancing dates. A lender, valuation or market can stop the intended timetable working. The ability to keep the property and meet its costs is therefore more important than writing an impressive repeat-purchase schedule on paper.
The targets I describe in the video are roughly 8% to 12% cash-on-cash for single lets and around 20% for HMOs. They are my screening ambitions, rather than typical returns every investor should expect. Different properties have different costs, management demands and risks.
Covid tested whether I could keep what I’d built
In 2020, the taxi business was responsible for roughly 75% of my income. When people were told to stay at home, a business built around moving them around faced an obvious problem. It was a difficult period, and parts of the life I’d built changed very quickly.
I’ve spoken openly about taking my children out of private school, losing the cars and the family home, and moving back in with my mum with my family at 36. I had thought I’d built something secure. That experience changed how I understood security.
I kept the rental portfolio, and the rent continued coming in. It made a real difference when I needed it. That doesn’t make property immune to problems, but it explains why long-term rental ownership means more to me than a number on a spreadsheet.
Holding an asset for years requires being able to keep it when another part of life becomes difficult. A strategy that looks efficient in good conditions can become fragile if it leaves no breathing room. That is a lesson I’d put alongside every discussion about recycling capital.
What I mean when I say I’ve recovered my original money
At the valuations I discuss in the video, the properties I own are worth more than I paid for them. Over the years, refinancing has also allowed me to recover the original capital I contributed and more. Those are related achievements, but they measure different things.
Higher estimated values aren’t the same as realised sale profits. Borrowed cash isn’t a gift. And recovering a deposit doesn’t mean the property has become risk-free. I still have mortgages, expenses, tenants to look after and exposure to changes in value and borrowing costs.
What it has given me is the opportunity to reuse capital while retaining income-producing assets. The portfolio started helping to fund its own growth. That process took years of decisions, some missed opportunities, purchases that worked and a period when life became much harder.
For someone starting now, I’d focus on the first sensible step: what money you have, what you can save, which property you understand and whether the income supports the plan. My three-step property investment plan is a useful place to continue. You can also book a free 20-minute strategy call, explore the Starter Club or look at Done For You if you want support with your next move.