Regional risk profile · Foreign buyers · Portugal 2026
Risk varies by region - and foreign buyers concentrate in the highest-risk markets
Algarve
Informal construction - pools, annexes, extensions
80%+
Foreign buyer share
Extensions, pool houses, and garden annexes from the 1980s–1990s built without permits - Loulé, Lagos, Albufeira
Rural rústico properties: additional risks around construction permissions and agricultural use restrictions
Pool inspection and water quality testing frequently absent from due diligence process
Pool Villa Bundle - inspection + pool + water quality
Lisbon and AML
Seismic exposure + undocumented rehabilitation
68%
Pre-seismic codes (CML/ReSist)
68% of building stock predates seismic codes - zero seismic design provisions in most pre-1983 construction
2015–2020 renovation boom: attic, basement, and garage conversions frequently unlicensed
DL 10/2024 eliminated the check that would have caught many of these before sale
Structural & Seismic Survey - for any pre-1983 acquisition
Cascais and Sintra
Heritage protection zones - some works impossible to legalise
REN
Protected zone risk
High concentration of properties in REN and classified heritage protection areas - some interventions technically impossible to legalise regardless of cost
Premium pricing masks compliance risk - expensive property is not synonymous with legally compliant property
Sintra UNESCO buffer zone: additional DGPC restrictions on alterations
Simplex Safe - verify licensed status before any offer
Porto and North
Granite and tabique - moisture and undocumented interiors
XIX–XX
Historic building stock
Granite construction: persistent moisture penetration through walls - often concealed by recent interior renovation
Structural materials (tabique) not documented in original project files