For UK Property Developers
Should You Split This House Into Flats?
UPA reads any property listing, from any property site, and models the split conversion - GDV, per-flat values, rental estimates and comparable flats - without leaving the page. Know if the conversion stacks before you buy, not after you've started knocking down walls.
Analyse My First Split Free48 hours of free deal analyses · No card · Installs in ~30 seconds
Runs right on top of the listings you already use:
No new workflow. No exporting to a spreadsheet.
A Split Conversion Is Only As Good As Its GDV
The listing looks like a conversion opportunity. Three flats, maybe four. The numbers seem to work on the back of a fag packet. So you drive an hour to view it, offer, and only later - when the planning officer caps you at two units and the comparable flats come in £20k lower than you hoped - do you find the GDV was a fantasy.
That's how developers get caught on split conversions. Not because they're careless, but because they're guessing at the achievable unit count, the per-flat values, and the true conversion cost - across five tabs, under pressure, before someone else offers.
Your spreadsheet calculates the GDV. It doesn't challenge the per-flat values behind it.
From Listing To Split Verdict In Under Two Minutes
Open any listing
Find a property on Rightmove, Zoopla, OnTheMarket or an auction site.
Click Analyse Deal
UPA reads the listing and models the split, per-flat values, GDV and rental income.
Read the verdict
GDV, per-flat values, rental estimates and the downside - all on the page.
The Part Other Split Calculators Skip
Most Calculators Show You The GDV At Full Price. UPA Shows You What Happens When The Flats Sell For Less.
Any tool can tell you a split conversion has a GDV of £313,104. The question that actually protects your money is: what happens when the flats don't sell for that?
With one click, UPA runs your split through automatic sanity checks and downside scenarios, so you see the GDV and profit at 100%, 90% and 85% of your per-flat values before you commit a penny.
Same property. Which number are you underwriting?
That's the difference between a split that looks good and one you actually understand.
Stress-Test My First Split Free
↑ At 90% of per-flat values, profit drops to £11,400. Nearly gone.
Every Flat. Every Value. Every Comparable.
The split is only as trustworthy as what feeds it. So UPA models the whole conversion - per-flat values, GDV, rents and costs - not just the headline number.
Per-flat values, broken down
See the GDV split across each unit - so your headline number rests on individual flat values, not a round-number guess.
Comparable flats, gathered for you
Nearby sold flat prices and £/sqm, scored for relevance, so your per-flat values rest on evidence, not one optimistic comp.
Every conversion cost, totalled
Purchase, conversion build costs, stamp duty, legals, finance - totalled into the real cash you need in, and the profit that's left.
What UPA Does On Every Split Conversion
GDV per flat. The gross development value broken down by individual unit.
Per-flat values & rents. Estimated sale price and rent for each flat in the split.
Comparable flats. Evidence for your per-flat values, not a guess.
Full conversion cost modelling. Purchase, build costs, SDLT, legals, finance.
Downside stress tests. Profit at 100%, 90% and 85% of per-flat values.
Saved deals & exports. Keep a record of every split you screen.
It's not a replacement for professional due diligence. It's the fastest way to decide which split deserves it.
Developers Are Screening Splits In Seconds, Not Evenings
UPA is live with a founding cohort of UK property developers who are screening split conversions in seconds, not evenings.
Real testimonials from founding members coming soon. If you're an early user with a split UPA caught, we'd love to hear your story.
We Built This Because We Were Guessing Too
We're UK developers and investors. We were analysing hundreds of split conversion deals a month, jumping between Rightmove, sold-price data, comparable flats and spreadsheets - and we still nearly overpaid on deals we thought stacked.
So we built the tool we wished existed: open a listing, click once, and see the GDV, the per-flat values and the downside in one place.
Now we don't offer on a split without stress-testing it first. Neither should you.
Keep Analysing Every Split. Founding Investor Price.
Your first 48 hours are free. When you're ready for unlimited, lock in the founding price.
UPA Developer Pass
Unlimited split conversion analysis for 12 months.
Total value £400+
£97 for 12 months
Founding Investor Price, locked while your membership stays active.
One payment for 12 months' access. It does not auto-charge. We'll remind you before it expires.
Founding price is for the first cohort of members. It rises for later ones.
The Risk Is Entirely On Us
Analyse 10 real deals in your first 14 days. If UPA doesn't catch at least one number you'd have gotten wrong on your own, email us for a full refund and keep your access anyway. The only way you lose is by guessing on your next deal without it.
Frequently Asked Questions
None. You get 48 hours of complete split analysis, every feature, no card. If it earns its place, you upgrade.
Your Next Split Is On Rightmove Right Now. See The GDV Before You Drive There.
Install free, analyse real split conversions for 48 hours, and see the GDV, per-flat values and the downside - before you waste a Saturday or an offer.
Analyse My First Split Free48 hours free · No card · ~30 seconds