One of the easiest mistakes to make with a refurbishment project is to assume that if finance is available, it must automatically be the right finance.
It doesn’t work like that.
A deal can look perfectly workable on paper, the lender can say yes, the money can arrive, and yet the finance can still be wrong for the property, wrong for the timescale, or wrong for the exit you are hoping to achieve.
And when that happens, the trouble does not always show itself on day one.
Quite often it appears later, when the project takes longer than expected, the refinance is harder than expected, or the true cost of the money starts eating away at what you thought was your profit.
That is one of the reasons finance matters more than some people realise.
Over the years the range of finance available for refurbishment projects has widened considerably, and in many ways that is a very good thing. There are now products specifically designed for properties that need work before they are lettable, bridging options that can fund the purchase and the refurb costs together, and clearer routes from the initial purchase through to the longer-term refinance at the end.
That is all helpful.
But more choice also means more ways to choose the wrong thing.
And in my experience, that is where a fair number of investors come unstuck. Not because the finance was unavailable, but because the finance they used did not really suit the job they were trying to do.
One common mistake is trying to use a standard buy-to-let mortgage on a property that simply is not suitable for one.
If a property needs significant work before it is habitable or lettable, many standard buy-to-let lenders will not be keen. And even where finance is technically available, the valuation may only reflect the property in its current condition, not what it may be worth once the works are done. That can leave an investor short of money, short of flexibility, or both.
So the first lesson is a simple one.
Do not start with the product.
Start with the property.
What exactly are you buying?
How much work does it need?
Is it habitable now?
Could it be let as it stands, even if not beautifully?
Or is it the sort of place where no sensible tenant would move in until a good deal of work had been done?
Those questions matter, because they immediately begin to narrow the finance options in a useful way.
Another mistake, and a very common one, is using bridging finance without being properly clear how you are going to get out of it.
Now, bridging certainly has its place. It can move quickly, it can cope with properties that other lenders do not like, and in some cases it can help fund not just the purchase but also the refurb costs. For the right project, it can be exactly the right tool.
But it is short-term money and it is usually more expensive than longer-term finance.
That means the exit is not some small detail to think about later. It is absolutely central to whether the deal makes sense at all.
If the exit is a refinance onto a buy-to-let mortgage once the works are done, you need to have reasonable confidence that this is actually achievable. If the exit is a sale, you need to be realistic about how long the project and the sale process may take. And in both cases you need to allow for the irritating fact that things do not always run to your timetable.
If you go into bridging without a clear and realistic exit, you are not really solving a problem. You are postponing one.
And postponing problems with expensive short-term money is rarely a brilliant plan.
The third mistake is not allowing properly for the full cost of the finance itself.
This is surprisingly easy to do.
People focus on the purchase price and the refurb costs because those are the obvious figures. The cost of the money can get treated almost as an afterthought. But fees, interest, and the effect of delays can make a meaningful difference to the final result.
A project that looks fine in a quick appraisal can feel rather different once it has run over by a couple of months and the finance cost has kept ticking away the whole time.
So when you are doing the figures, finance needs to be costed fully and honestly, not just approximately.
And it needs to be matched to the whole deal.
The property.
The works.
The likely timescale.
The exit.
The amount of money you need to put in.
And how much room there is if things drift a bit, which they often do.
That is why I think it is dangerous to ask a broad question like, “What’s the best finance for a refurb?”
There is no single answer to that.
The best finance for a straightforward property that only needs cosmetic improvement may be completely wrong for a heavier project needing major works and a quick purchase. And the right answer for one investor may be wrong for another because their exit, cash position or appetite for risk is different.
So what goes wrong?
Usually one of three things.
People use the wrong product for the wrong property.
They take short-term finance without a clear exit.
Or they underestimate the true cost of the money.
None of those mistakes necessarily looks dramatic at the beginning. That is partly why they are dangerous. The deal can still look neat enough when you first agree it. The problem only becomes obvious later, when the finance starts making the job harder rather than easier.
That is why, on anything beyond the simplest deal, I think a good specialist broker is well worth having.
This part of the market is more involved than standard buy-to-let. Products change. Criteria change. Lenders’ appetites change. And a broker who understands refurbishment finance properly can save you time, help you avoid products that do not suit the project, and point you towards options you may not have found on your own.
If you do not have a broker, or if you would like a second opinion, I am very happy to introduce you to my own mortgage broker, who has worked with me for many years. Just email me at thepropertyteacher@gmail.com and I will put you in touch.
The right finance can help a good deal work smoothly.
The wrong finance can quietly undermine it from the start.
Here’s to successful property renovating.
Peter Jones (ex) Chartered Surveyor, author and property investor
www.thepropertyteacher.co.uk
By the way, I’ve completely rewritten and updated my course for 2026, The Successful Property Renovator’s Workshop — a comprehensive guide to renovating properties properly and profitably, based on my own experience across well over 150 projects over thirty years. For more details please go to: https://thepropertyteacher.co.uk/the-successful-property-renovators-workshop-2/