Paste a listing from leboncoin, Zillow, Rightmove, or ImmobilienScout. RendIQ runs the eight French-style return metrics, compares against the local market, and tells you to buy, negotiate, or walk away. In four seconds.
Most listing sites tell you the asking price. RendIQ tells you whether to pay it. The product reads the listing, runs the same calculations a Paris-trained property analyst would run on a yellow pad, and writes the verdict in a sentence.
Section 01 · Method
Every analysis returns a verdict that sits on these six pillars. No upside framing, no urgency copy, no rush to buy.
The 0–10 RendIQ score weighs yield, cash flow, payment-to-rent ratio, and market-price gap. Above 7.5 is a buy; below 4.5 is a walk-away. Anything in between gets a written reason.
Monthly cash flow after mortgage, taxes, insurance, vacancy, and maintenance. The number you actually keep, not the gross rent.
Asking price compared against the rolling 24-month median €/m² for the precinct, with confidence bands when comps are sparse.
Eight flag codes from the same engine that runs the score: thin DSCR, single rental comp, rent control, age of roof, deferred maintenance. Always shown above the verdict.
Each strategy is scored separately and the best one is named. Tax regime is read from the country, not assumed.
Three nearby comps and the same money in a broad-market ETF, side by side, over the same 10-year horizon.
12 rue de la République, Haubourdin (FR). Fetched 18 May 2026 from leboncoin.
Gross yield of 11.6% comfortably clears the 8% French target. Payment-to-rent sits at 45%, well below the 70% rule. The listing is priced 3.2% under the local median. Verify the rental comp before committing.
Every screen reads the same eight metrics from the same API. The verdict you see in the extension is the verdict the web app would write.
Installs on Chrome and Firefox. Detects pages on leboncoin, Zillow, Redfin, Rightmove, ImmoScout, and seven more. Floats a pill in the corner; click it for the full panel.
Open any property in the analyser. Conservative · neutral · aggressive scenarios toggle in one click; everything reflows in 220 ms. Cash flow chart, comp table, risk rail. Export to PDF for your lender.
Track listings, get a notification when the asking price drops below your buy threshold. iOS and Android. Same metrics, same verdicts, same disclaimer.
“The first analytics product I've seen that respects the investor's time. The number on top is honest; the disclaimer at the bottom is non-negotiable. That's the trade.”
Each market gets its own tax regime, its own rent index, its own comparable density. The disclaimer is rewritten in the local tongue, not translated word-for-word.
| Market | Methodology | Tax regime | Median €/m² | Comp density | |
|---|---|---|---|---|---|
| FR | France | Règle des 70% | LMNP · Pinel · SCI | 4,820 | High |
| UK | United Kingdom | Buy-to-let yield, stress-tested DSCR | Section 24 · stamp duty | 5,140 | High |
| DE | Germany | Mietspiegel · post-AfA | AfA · Spekulationsfrist | 4,360 | Medium |
| ES | Spain | Rentabilidad neta, ITP-adjusted | IRPF · IBI · plusvalía | 2,810 | Medium |
All plans include every metric, every market, every locale. The tiers gate volume, comps depth, and PDF exports, never the verdict.
À titre éducatif uniquement. Pas de conseil financier.
Educational purposes only. Not financial advice.
Nur zu Bildungszwecken. Keine Finanzberatung.
Solo con fines educativos. No es asesoramiento financiero.