PropertyPredator scores any property in seconds, then appraises the ones worth your time the way a developer would: four strategies, three-nation stamp duty, highest-and-best-use, and the one number your spreadsheet makes you solve by hand — your maximum offer. Reproduced to the penny.
Score your next property free →You find a property, pull it into a spreadsheet you've spent years getting right, and grind through it — purchase, refurb, stamp duty, finance, refinance, yield, ROCE, exit. You know the deal isn't the asking price. The deal is the number you can pay and still walk away with the return you came for.
The spreadsheet gets you there. Eventually. After you've re-typed the stamp duty bands for the third time this month, second-guessed whether that's the England figure or the Scotland one, and reverse-engineered the max offer by nudging the purchase-price cell until the ROCE turns green.
It works. It's also slow, it lives on one laptop, and it does the reverse-solve in your head.
The slow version isn't free. It costs you the deals you didn't get to in time — and, worse, the ones you did, at a price that looked fine because the model wasn't quite finished when you offered.
Overpay by 5% on a £240k purchase and you've handed back most of a year's net return before you've collected a penny of rent. Mis-key the stamp duty — the old flat "£2,000" that's actually £14,300 on an England BTL, or £28,600 in Scotland — and the deal you green-lit was never green. The numbers don't forgive approximations. The market doesn't wait while you finish the sheet.
It does the sums deterministically — the same logic every time, no heuristics guessing at your return. It was reverse-engineered from a working developer's Master Appraisal Sheet until it reproduced that sheet's outputs to the decimal. Same metric definitions you actually use — ROCE on money left in after refinance, gross yield on money-in, residual land value against your target margin.
Buy-refurb-refinance/rent · Flip · Commercial conversion (change of use, roof raise, extension) · Ground-up / new build — each valued the way it should be.
Surcharges, ADS on the full price, the lot — and at auction it charges on the bid plus buyer's premium, the way HMRC actually does.
Comparable (£/sqft), investment (yield) and manual — side by side, with the gap between bricks-value and yield-value flagged.
Set your "good deal" thresholds. It solves the highest price you can pay and still hit them. No more nudging cells.
Here's the deal the engine was validated against — a real appraisal, run both ways:
Those are the developer's own spreadsheet figures. PropertyPredator returns every one of them, exactly. That's the bar: if it doesn't match the sheet you trust, it isn't worth opening. It matches.
You're buying to add value: conversions, refurb-to-refinance, flips, ground-up. You make five- and six-figure decisions on a spreadsheet and want them faster, harder, and reverse-solvable.
You buy at asking and hope. The whole point of this tool is the number below asking.
Start free. The £29 Deal Report credits toward Pro. Already running your portfolio in Ordris? Your PP Pro is discounted — and a PP Pro subscription discounts your Ordris.
Score properties, run the demo, see the engine work — for nothing, no card. You only pay when you point it at a live deal you're serious about. We're not asking you to trust the maths. We're asking you to check it against the sheet you already trust.
That's the design goal — it was built by reproducing a developer's master sheet to the penny. Run a deal you've already modelled and check. If your definitions differ, the thresholds and defaults are yours to set.
Yields, £/sqft and stamp duty are handled by nation and region, and the live feed (Investor tier) pulls property-specific data. Postcode data beats the regional fallback every time.
No. PropertyPredator is decision-support: it runs your numbers against your thresholds. The judgment — and the offer — stays yours.
The Investor tier connects a live property-data feed with an included lookup allowance, then metered credits beyond it. You pay for what you actually look up, not a flat fee for data you don't use.
Do it in the time it takes to read the listing — with the stamp duty already right and the maximum offer already solved.
Score your next property free →