Live risk layer over Greater Accra: flood corridors, no-build buffers and scored plots

CHECK FIRST

See Ghana
clearly.

Property intelligence for African real estate. Verified listings, honest risk scores and evidence you can forward.

ARCE 2026 · PROPTECH PITCH COMPETITION

Alexander Kwamin — Founder and President

The Palms Convention Center, Accra · 14–16 Oct 2026

LIVE RISK LAYER · GREATER ACCRA · 5.6037°N 0.1870°W

Flood corridors and no-build buffers drawn over plots in Greater Accra

THE PROBLEM

An uncle is not a due diligence process.

Most property loss in Ghana is not dramatic fraud. It is a plot sold twice, a house on a watercourse, or a price no local would have paid.

And it happens to people who did everything they were told.

ASTA · ARCE 2026

02 / 06

WHERE WE SAW THE OPPORTUNITY

The money is already moving. The trust layer is missing.

$54B

Sent home to sub-Saharan Africa in 2023.

$7.79B

Sent to Ghana alone in 2025.

51m+

Homes short across Africa. Nigeria 28m. Ghana 1.8m.

Free to list.

Subscriptions for brokers.

Metered API for banks, insurers, DFIs.

Sources: World Bank Migration and Development Brief 40; remittances to Ghana, 2025; CAHF housing deficit 2022, via Africa Check.

03 / 06

WHAT WE BUILT

Years of data. Real science. One honest score.

Data we collated

JRC Global Surface Water, OpenStreetMap hydrology, Ghana's protected-area registry and scout visits on the ground.

Five risk layers

Flood, flash flood, no-build, galamsey and fault lines. One severe flag caps the score; nothing is averaged away.

Validated

Flood model ROC-AUC 0.88 against the JRC CEMS-GLOFAS reference. 529 flash-flood basins modelled.

In production

Live at app.asta.homes, with the Dossier and the Partner Portal.

ASTA · ARCE 2026

04 / 06

Live Asta risk map of Greater Accra with flood corridors, no-build buffers and scored plots

LIVE · APP.ASTA.HOMES

Now, watch.

ASTA · ARCE 2026

05 / 06

SEE MORE

Come to the Asta Pavilion.

Stand [ST__]. Bring a plot you care about and see its Dossier in ninety seconds.

Banks, insurers

A 90-day API pilot.

Agents, MLS

List free. Verify.

Government

A data partnership.

Investors

Take it continental.

Trust, verified. · asta.homes · hello@asta.homes

06 / 06

BACKUP · QUESTIONS

Questions the panel will ask.

Do you verify title?

No, and no listing site can. We confirm the property exists at its coordinates and that the photos match, then refer every buyer to a formal Lands Commission search.

Where does the risk data come from?

Public sources: JRC Global Surface Water, OpenStreetMap hydrology and Ghana's protected area registry, plus comparable asking prices. Inputs are shown on every score.

Why not average the risk factors?

Averaging hides the problem that matters. A cheap, dry plot inside a demolition buffer is still a bad plot, so one severe flag caps the score.

How do you get listings?

Owners and agents list free: ten listings and a full Dossier. Field scouts verify on the ground. Brokers upgrade for the badge and the leads.

Do you compete with portals or MLS?

No. They win on volume. Asta adds the analysis layer, and our API lets any platform show verified, risk-scored listings.

What stops a larger player copying you?

Time on the ground. Scout-verified records and mapped risk zones compound with every listing. We plan to be the data standard before a well-funded challenger arrives.

ASTA · ARCE 2026

BACKUP

BACKUP · SOURCES

A source for every figure we say on stage.

CLAIM SOURCE STATUS
$54B sent to sub-Saharan Africa, 2023 World Bank Migration and Development Brief 40 Confirm primary
$7.79B sent to Ghana, 2025 Remittance data for Ghana, 2025 Confirm primary
51m+ homes short across Africa; Nigeria 28m; Ghana 1.8m CAHF housing deficit 2022, via Africa Check Confirm primary
Risk score inputs JRC Global Surface Water; OpenStreetMap; Ghana protected area registry Public
Flood model ROC-AUC 0.88; 529 flash-flood basins Asta documentation, validated against JRC CEMS-GLOFAS Company data
Prampram plot, ₵115,000, risk 65 Staged demo asset, from a live listing Company data
Five risk layers: flood, flash flood, no-build, galamsey, fault lines Asta documentation Company data
ARCE pillars and judging criteria arceconference.com/proptech-startup Public

TRUST, VERIFIED.

BACKUP