feaso builds the schemes that fit on your site, costs every line properly, works out how much of your own cash goes in and when — then hands you a three-page brief you can put in front of a lender. Minutes, not a fortnight.
No software to learn · Every assumption shown and sourced · Downside tested
Every figure names what to check it against· Land Registry comparablesBCISAdopted CIL schedulesNHBCSDLT · LBTT · LTT bandsBNG metric
Land, a round-number build cost, subtract. Both bars below are the same scheme and the same £6.71m of sales value. The only difference is how much of the cost got counted.
You are not filling in an appraisal. You describe a site, and the schemes it will carry are built, costed and written up for you.
Drag a boundary to size or drop in an address, then set the height and coverage your planners will actually wear.
Every scheme the constraints allow, massed and costed on identical assumptions — then drawn down month by month, so you can see the peak funding and what it costs to carry.
Three pages: the scheme and whether it works, then the money — funding, drawdown and the downside cases they will ask about — then every option, every cost line and what to check each against.
A feasibility appraisal is a spreadsheet question with a building at the end of it. feaso does the spreadsheet part in a minute — the schemes the site will carry, every cost line, the cashflow, the downside — so the part that matters is the only part you spend your judgement on.
Illustrative. The tool models envelopes and money, not interiors.
Houses at low density, walk-up flats, and a scheme pushed to the caps you set. The denser option is not automatically the better one — that is the argument the brief settles.
Every face of this is derived from the width, the depth, the storey cap and the cover you gave it — which is the only reason the unit count, and the costs underneath it, have any basis at all. It turns as you scroll past.
That is the product, not a fault in it
Return against what you pay for the land, on this scheme. Where the curve crosses a lender's threshold is the most you can bid and still have a deal worth doing.
An appraisal is only as good as what sits underneath it. Nothing here is asserted — each figure carries its basis, its confidence, and the document you should check it against.
A traditional feasibility report runs £5,000–£12,000 and takes weeks. At £20 a site you can run one on every plot you look at, not just the ones you have already talked yourself into.
Indicative pricing for a product still in build.
No. feaso produces an indicative appraisal to support your own decision-making. It is not a RICS valuation, not a planning opinion and not financial advice, and your lender will still commission their own valuation. What it does is get your numbers straight before you approach them.
Regional benchmarks by default, refined for your location. Every figure is labelled with its source — benchmark, derived, or entered by you — carries a confidence rating, and names the document you should check it against. Anything the tool cannot yet source, it tells you to verify rather than quietly asserting.
It is a schematic envelope study, not a design. It takes your site dimensions and planning caps and shows what floor area they imply, so the unit count and the costs have a believable basis. It takes no account of daylight, overlooking, access, parking standards, trees, easements or site levels — those come from an architect.
Then you have found that out for £20 instead of after exchange. Most appraisals we run come back below a lender's threshold, and the tool tells you what the site would need to cost to work. That is the product, not a failure of it.
Lorcan Knox. I am a real estate transaction analyst — I underwrite deals for institutional investors, and before that I was in capital markets at Colliers. I read architecture at Nottingham before moving to the money side, which is why the massing is not an afterthought. feaso is the appraisal work I do at institutional scale, pointed at schemes that have never been able to carry the cost of it. It is one person, not a team, and every reply you get is from me.
The engine works anywhere, but the data behind it is strongest in England and Wales, where Land Registry and planning data are open. Scottish and Northern Irish sites will lean more heavily on figures you supply yourself.
Early access is open to UK developers and builders working on sites under twenty units. Bring a live site — it is the only useful test.
Small developers make some of the most consequential decisions in property with the least analytical support of anyone in the market. feaso exists to close that gap.
Institutional investors do not buy a site without a full appraisal. Every cost line is modelled, every assumption sourced, every downside tested. That work is done by analysts, and it is why institutional money rarely gets caught by a cost nobody budgeted for.
A developer doing four flats gets none of that. A traditional feasibility report costs £5,000 to £12,000 and takes weeks, which makes no sense against a scheme of that size. So the appraisal simply does not happen — and the deal gets underwritten on a phone calculator instead.
That asymmetry is not about intelligence. It is about access. The maths is not hard; it is just tedious, and it needs someone who knows which lines are usually missed. feaso automates the tedious part and keeps a person in the loop for the judgement.
It is being built by a real estate transaction analyst who underwrites deals for institutional investors — the same appraisal work, pointed at the people who have never been able to afford it.
Every figure is labelled with where it came from — benchmark, derived, retrieved source, or you. A tool that blurs that line is worse than no tool, because it puts your credibility behind a number you cannot defend.
Most appraisals we run will say the deal does not stack. That is the value. Finding it before you exchange is worth considerably more than a report that flatters the scheme.
The output has to be something you can actually send to a lender or a partner and have them read to the end. Length is not rigour.
The appraisal you skip is the one that would have saved you. At twenty pounds it costs less than the drive out to view the site.
Give it an address and a size. Every cost line is derived, every option is costed, and the brief is one button away.
If you are buying with planning in place, drop the months to start. If you are buying the fight, put them up — it is often the largest single line you have any control over.
Rates are regional benchmarks selected from the address, not a live read of that council's charging schedule or of Land Registry comparables. Verify each against the source named in the brief before relying on it.