What is below market value (BMV) and how do you verify it?

What BMV actually means

Below market value simply means buying a property for less than its current market value. If comparable properties on the same street are selling for £160,000 and you negotiate or buy at auction for £130,000, you have potentially bought at 19% below market value.

The word "potentially" is important. Market value is not a precise figure. It is the price a willing buyer would pay a willing seller in an arm's-length transaction with reasonable knowledge of the market. Two identical houses on the same street can sell for 10-15% different prices in the same month depending on who is buying, how urgent the sale is, and what condition the property is in.

BMV is a spectrum, not a binary. A property bought at 5% below the average for the postcode is mildly below market. A property bought at 25% below is substantially below market. The difference matters for the investment case.

For auction investors, the appeal of BMV is that a discount at purchase creates instant equity and lowers the yield calculation denominator, making the maths work better. A property you buy for £130,000 that is worth £160,000 gives you £30,000 of equity from day one, and a yield calculated on £130,000 rather than £160,000.

How Proppys estimates BMV

Proppys calculates a rough BMV estimate using two data sources: Land Registry sold prices for recent comparable transactions in the same postcode district, and Rightmove/Zoopla asking price history for similar properties.

The calculation takes the median sold price for the same property type and bedroom count in the postcode district over the last 12 months, then compares it to the guide price or asking price. The result is an indicative percentage discount or premium.

This is a useful starting signal, but it has limitations. The postcode district (e.g., NE6) can cover hundreds of different streets with very different prices. A Victorian terrace on a quiet cul-de-sac and a mid-terrace on a busy road in the same postcode district are not directly comparable. The BMV figure should be treated as a prompt to investigate further, not a reliable valuation.

How to verify BMV independently

The most reliable way to verify BMV is to find genuine comparable sales - properties similar in size, type, condition, and location - that have actually completed in the last 6-12 months.

Land Registry sold prices (free at gov.uk/search-house-prices) show completed sales with addresses and dates. Search for the specific road and nearby streets. Look for properties of the same type and approximate size. Note that Land Registry data lags by 3-6 months, so recent sales may not yet appear.

Rightmove and Zoopla sold price data shows historical asking prices alongside sold prices where available. Zoopla in particular shows when properties were last sold and at what price, which helps you understand whether a property has already been bought and sold recently.

Speak to a local estate agent - not to ask whether to buy, but to ask what similar properties are actually selling for right now. Agents know their patch. A two-minute call to three local agents will give you a better sense of market value than any automated tool.

RICS valuation - for a property you are seriously considering buying (particularly at auction), commissioning an independent RICS valuation (typically £300-£500) before bidding is money well spent. For auction purchases, you usually need to do this before the auction, not after.

Where genuine BMV comes from

Properties do not sell below market value randomly. There are specific circumstances that create motivated sellers willing to accept less than full value.

Probate sales: Properties being sold by estates are often priced to sell quickly rather than to maximise price. Beneficiaries may not want a protracted sale. Probate properties are a significant source of auction stock.

Repossessions: Banks selling repossessed properties are motivated to recover their debt, not maximise price. They will typically accept 85-90% of market value for a clean, quick sale.

Unmortgageable properties: Properties with structural issues, missing planning certificates, short leases, or other legal problems cannot be bought with a standard mortgage. Cash buyers who can accept these risks buy at a discount. Once the issue is resolved, the property is worth full market value.

Genuine urgency: Divorce, emigration, financial distress. Sellers who need to move fast will accept a lower price. These deals happen off-market through networking rather than through auctions.

The risk with BMV is assuming that anything sold at auction at a low guide price is below market value. Many auction properties have guide prices set attractively low to generate interest - the actual selling price can exceed market value if multiple bidders compete. The guide price is not a valuation.

The trap: BMV but still a bad deal

A common mistake is focusing on the discount and losing sight of whether the investment actually works.

A property at 20% below market value in an area with 4% gross yield is still a poor investment. The yield does not change because you paid less than the neighbours - the rent is what the market will pay. If the yield is marginal at the discounted price, it is simply terrible at market value.

BMV is most valuable when combined with strong yield. A property bought at 15% below market value at a 7% gross yield on the purchase price is a genuinely compelling deal. You have instant equity, a yield that works, and a margin of safety if the market dips.

Do not let the excitement of a BMV discount distract from running the yield and cashflow numbers properly. A cheap property in the wrong area is still the wrong area.

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