Validate demand for a European building‑permits API (dev‑focused)

Validate demand for a European building‑permits API (dev‑focused) targets a $1.1B = 55,000 potential global buyers (proptech platforms, lenders, insurers, large builders, municipal analytics teams) x $20K ACV total addressable market with low saturation and a year-over-year growth rate of 10-18% sector tailwinds driven by proptech and insurtech adoption.

Key trends driving demand: Open-government-data adoption -- more authorities publish permits but formats vary, creating demand for normalization; Proptech growth -- marketplaces, lead-gen and valuation tools seek upstream signals like permits; Event-driven integrations -- webhooks/real-time alerts are becoming table stakes for operational tooling.