Feasibility and funding

Know it stacks up before you commit.

STACK is feasibility, budgets and funding for independent and SME property developers. It answers the two questions every scheme starts with: does this stack up, and how do I fund it.

Become a design partner See the product

FlitrrSTACKAppraised

Fenwick Yard, Leeds

12 homes · Debt-financed, senior only

Profit on cost

21.5^%

1.5 points clear of the 20% target

Gross development value£4,200,000

Total cost£3,458,000

Profit£742,000

Funded by

Senior debt£2,248,000Your equity£1,210,000

ReconciledUses funded equals uses; value equals redemption plus distributions. Zero, twice, on every strategy.

Most schemes are committed on a spreadsheet nobody fully trusts. STACK is built so the decision can defend itself.

Large developers answer these questions with appraisal teams, cost consultants and specialist viability tools. STACK gives that to you directly, guided for someone with only basic financial knowledge.

The old wayA spreadsheet, trusted blind

Build costpasted in, source unknown

Interest formulabroken since the last edit

The bottom linedoes not reconcile

It looked right. Nobody could prove it.

Choose the route. Enter the scheme. Read the answer.

A guided appraisal you can run with basic financial knowledge, and a result a lender can interrogate.

Funding strategy

Self-fundedDebt-financedJoint ventureOff-plan

Choose the funding strategy

The strategy is the main switch. It drives what you are asked and how the result is computed, so you only ever see the fields your route needs.

Gross development valueThe sale value of the finished scheme

Senior interest rateRolled up. Typical 6.5 to 9%

Enter the scheme, guided

Every field carries plain guidance and a typical range, with forced choices where possible, so you are never left guessing what a number means.

On or above targetGo

Profit on cost21.5%

Residual land£1,050,000

Read the answer

A summary with a plain GO, CONSIDER or NO GO, the monthly cashflow behind it, a side-by-side comparison of funding routes, and sensitivity on the variables that bite. Export it as a PDF report or a values-only workbook.

Move the numbers. Watch it answer.

A scheme rarely fails at appraisal. It fails when the numbers move later. Drag the value or the build cost and the verdict recomputes, deterministically, exactly as the full model does.

A worked illustration in the engine’s own vocabulary: GO, CONSIDER, NO GO.

FlitrrSTACKSensitivity

Fenwick Yard, Leeds

The same appraisal, moved by hand

Gross development value£4,200,000

Build cost£2,400,000

Profit on cost

21.5^%

£742,000Profit£3,458,000Total cost

VerdictOn or above target, with the funding sized.Go

ReconciledZero, twice, on every move: the same identities the full model proves.

No invented numbers. No unexplained ones.

Every output is a pure function of the inputs, and every assumption carries its basis. The model proves it by reconciling to zero, twice, on every strategy.

cash uses funded = cash uses

Run it twice and get the same answer. Nothing is sampled, nothing is guessed.

0.00difference, every strategy

net value = redemption + distributions

You, a lender or a partner can see where each figure comes from and challenge it.

0.00difference, every run

Four ways to fund a scheme. One model.

Pick your route, or compare them side by side on the same scheme.

Self-funded

All your own money. The cleanest read of whether the scheme itself works.

Your equity alone

Debt-financed

A senior loan sized by loan to cost and loan to GDV caps, with an optional mezzanine top-up.

Senior debt + your equity

Joint venture

A partner brings cash, land or both, with a preferred return and a promote. Land for equity included.

Partner capital + your equity

Off-plan

Pre-sales fund the build, the route that leads in Lagos as often as in Leeds.

Pre-sales + debt + equity

Built for the United Kingdom and Nigeria from day one.

SDLT, Section 106 and the Community Infrastructure Levy on one side; off-plan-led funding and naira reporting on the other. Six currencies, GBP by default.

Downstream: the deliveryThe scheme STACK proves becomes the baseline PULSE protects, stage by stage, to disposal.Discover PULSE Downstream: the appointmentsThe funding strategy settled here is a fact ROUTE’s fit check reads when the procurement route is chosen.Discover ROUTE Beneath it allThe Flitrr Framework: the delivery discipline behind every Flitrr product, carried upstream to the decision.Explore the Framework

Shape the tool you will fund schemes with.

STACK is being shaped with a small group of property developers. If you want the appraisal discipline before everyone else has it, talk to us.

Prefer email? Reach us directly at hello@flitrr.com.