Portugal's second city — yields 5–8%, prices 40% below Lisbon, UNESCO Ribeira waterfront. Moderate seismic risk (lower than Lisbon). Douro river flood risk in low-lying waterfront areas. Critical: Porto city centre is NOT eligible for Portugal Golden Visa residential route under 2023 restrictions.
⚠ Golden Visa Warning: Porto city centre is classified as a "densely populated coastal area" under Portugal's 2023 Golden Visa reform. Residential real estate purchases in Porto, Lisbon and the Algarve are NOT eligible for the Golden Visa. Interior municipalities (Douro Valley, Trás-os-Montes, Minho interior) and commercial/rehabilitation projects in Porto may still qualify. Always verify specific address eligibility before purchase for GV purposes. RiskAI X includes GV zone check for every Portuguese address.