Why don't you up to date
Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

Before It's Built turns a photo of a construction site's planning notice into the future building — standing on the city's 3D model, before it's built. The earliest, most accurate record of how a neighborhood will change is bolted to a construction fence: a sign reading "height 25 m, 16 floors" that no resident can actually picture. People grasp the impact on their sunlight, view, and street only after the explanation meeting — or after the crane is already up. Buyers sign before a tower appears across the street. And official 3D city models like Japan's PLATEAU are re-surveyed only every few years, so the places changing fastest are the most out of date — stale ground truth for planning, delivery robots, or any simulation. Our fix: snap the notice board. An AI agent finds the sign, reads it, cross-checks it against and — only when confident — stands the planned building up on the PLATEAU digital twin, next to the buildings being demolishss from their own streetand check, before construction starts, whether it will cast a winter shadow on their home. It's the citm the street. Live for Meguro, Tokyo o(web-only). Privacy bydesign: the board also carries personal names (owner, architect, contractor) — we never extract or store them.