The Hamlet Challenge: A Quick Way to Assess Any Property Deal

Gareth shares a back-of-a-fag-packet technique for filtering property deals in minutes, working backwards from end value to a realistic offer price before you commit to full due diligence.

Why Starting With the Asking Price Gets You Into Trouble

One of the most common questions property investors ask is "how much should I offer?" The trouble starts when you approach that question from the wrong direction: looking at the asking price first, then trying to bend the numbers until they fit. That's a recipe for talking yourself into a deal that doesn't actually work. A simpler approach, learned years ago from a mentor, flips the process entirely — start with the end in mind and work backwards.

What the Hamlet Challenge Actually Is

The name comes from a much older habit: assessing a deal on the back of a cigar packet (a "Hamlet" packet, in this case) down the pub, before committing to any serious analysis. The idea isn't to replace due diligence — it's a quick filter. It lets you decide in a couple of minutes whether a deal is worth taking to the next level, or whether it should go straight in the bin.

Step One: Establish the End Value (GDV)

Everything starts with the gross development value — what the property will be worth once the work is done. If you know your local market and the property type well, you should be able to estimate this reasonably accurately just from photos and a general sense of the street. This isn't the moment for detailed comparable analysis; it's a realistic, not aspirational, estimate of the finished value.

Step Two: Apply the Refinance Percentage

Once you have a GDV, apply the expected refinance loan-to-value — typically 75% for a standard buy-to-let. On a property worth £200,000 once finished, that gives a refinance figure of £150,000, assuming the numbers stack up on rental stress testing and lender criteria.

Step Three: Deduct Refurbishment Costs and Fees

From that £150,000, deduct the refurbishment budget. A quick scroll through the photos on a listing is usually enough to build a mental checklist — new kitchen, bathroom, electrics, flooring — and arrive at a ballpark figure, say £40,000. Then deduct the other transaction costs: stamp duty, solicitors, valuation and broker fees, lender fees, insurance and holding costs. Using a round £10,000 for these keeps the sum simple.

The Result: An Indicative Offer Price

Working through the example: £200,000 GDV, minus 25% (leaving £150,000 refinance), minus £40,000 refurbishment, minus £10,000 costs, leaves £100,000. That's the indicative purchase price for an all-money-out BRR deal. If the property is listed at £180,000, the deal is clearly off the table. If it's listed at £135,000, there's a conversation worth having — even if it doesn't end up being a full all-money-out result, there may still be a workable deal at £110,000 or £120,000.