Seismic Risk in Sofia
Before You Sign.

Sofia is in Zone 7 per BG NA:2012 (Eurocode 8), with design PGA 0.20g. The city sits in the Sofia basin — a graben structure with soft alluvial sediments that amplify seismic waves 2–3x compared to bedrock.

The central Sofia basin (Lozenets, Mladost panel blocks, Lulin) sits on soft alluvial soils. Vitosha Mountain slopes (Dragalevtsi, Simeonovo) have stiffer materials with lower amplification.

Panelki are prefabricated concrete panel buildings from 1960–1985. They have poor seismic connections, aging reinforcement, and were not designed to Eurocode 8. Banks increasingly require structural assessments for pre-1985 panelki.

Use AGKK (kais.agk.bg) for cadastral data. Check Imotni registri (Property Registry) for ownership. Verify if the building has a Технически Паспорт (Technical Passport) — mandatory since 2009 for existing buildings.