Below Market Value Almost Never Actually Exists
20 September 2026 · 6 min read · by Steve Potter

"It's 20% below market value."
You'll hear that phrase constantly around property education and from sourcers selling deals. Almost none of it is actually true.
Real BMV is almost unheard of
Genuine below market value only exists in one narrow set of circumstances: the seller has to move extremely fast, and they sign something acknowledging they know the property is worth more than they're accepting for it. That's it. That's the only version of BMV that's real.
It's rare. Genuinely rare, not "rare but happens a lot if you know where to look" rare. Most of what gets marketed as BMV isn't that at all. It's a normal asking price dressed up as a discount, because "20% below market value" sounds a lot more exciting to a buyer than "the asking price."
A property is only worth what someone will actually pay for it
Here's the part that actually matters. A property doesn't have a fixed "true value" that the asking price is measured against. It's worth what someone will actually pay for it, full stop.
Just because a property goes on the market at £300,000 doesn't mean £300,000 is its value in today's market. That's why prices tend to drift down over the following twelve weeks if it doesn't sell, the market is telling the seller, in real time, that their asking price wasn't the value. Or it sells within 24 hours, which usually means the opposite: it was priced too low relative to what buyers were actually willing to pay.
The eventual sale price, not the asking price, is the real evidence of value. And once that sale completes, something else happens that most buyers never think about: your purchase price becomes a new comparable. It and every genuinely similar property nearby is now worth roughly what you just paid, today, whether that number is higher or lower than whatever the old asking prices around it suggested.
That's not a technicality. It's the actual mechanism. "Below market value" implies there's a fixed market value sitting somewhere that you've beaten. There usually isn't one to beat. There's only what buyers have actually been paying for comparable properties, and what you're about to pay becomes part of that evidence the moment you complete.
Why this matters for how you test a deal
None of this means good deals don't exist. It means the test for a good deal can't be "the sourcer told me it's 20% BMV," because that claim usually can't be verified, and often isn't even true in any meaningful sense.
A good deal needs to work financially. It needs to move you toward your actual destination. It needs to fit the resources you genuinely have. It needs to respect the boundaries you've chosen. The reward needs to justify the risk, effort, and complexity. And you need enough resilience in the plan to survive being wrong about some of it.
That's a much harder standard than "it's cheap." Good. It should be. You're not trying to collect deals that sound like bargains. You're trying to build something, and every property you buy should have a specific job within that plan, verified against real comparable sales, not a sourcer's claim about a discount that may not exist.
Three tests, not a headline number
When I'm actually deciding on a deal in front of me, I run it through three tests, and "is it BMV" isn't one of them.
Does the deal work financially? The maths, based on real comparable sold prices, not asking prices and not somebody's claimed valuation.
Does the deal fit? Not the market. You. Your destination, your resources, your time, your skills, your risk tolerance, your boundaries. A financially good deal can fail here, and that's fine, there will be other deals.
What happens when I'm wrong? Because at some point you will be. I have been. Every experienced investor has. What if the refurbishment costs more than planned? What if the income is lower? What if the property takes longer to sell, or the refinance doesn't release what you expected? You can't eliminate that uncertainty. You can stop pretending it doesn't exist, and you can stop pretending a "BMV" label removes it either.
Steve Potter
Steve Potter is the founder and CEO of Property Legacy Education Ltd, along with five other successful property companies. With a proven track record in the property investment world, Steve built a £1.3 million property portfolio in just three years. He is passionate about helping others achieve financial freedom through strategic property investment. As the author of two #1 Amazon best-selling books, Steve regularly shares his expertise through blogs, consultations, and speaking events. With a background in electrical engineering and a sharp focus on scalable investment strategies, Steve provides practical guidance for investors at all levels, empowering them to build thriving property businesses.