Hover over Google Maps (map or satellite) or OpenStreetMap anywhere in Nigeria and a small card shows the value at your cursor: land per m² and a typical plot, house prices and build cost, or rents and yields. Hold Shift to pin the card, switch between land, building and rent, and open the full report with the NIPOST postcode.
Download the extension (.zip)chrome://extensions and switch on Developer mode (top right).Turn it on or off from the toolbar icon or with Alt+Shift+V. The toolbar popup also values any coordinates or map link you paste.
The extension reads the map position from the page address and your cursor position on the map, and works out the value on your own computer from the Land Value Book's public data files, which it downloads from value.buildocrat.store. It sends nothing about you, your browsing or your location anywhere, stores only your on/off and tab choice, and runs only on Google Maps and OpenStreetMap.
Values are indicative asking prices for screening and negotiation, not a valuation report.