Saudi investors evaluating Turkish real estate have grown more attentive to structural risk since the 2023 earthquakes reshaped how the market prices and regulates buildings. For a buyer accustomed to Saudi Arabia's own seismic considerations along the western Red Sea corridor, Türkiye's regulatory environment will feel both familiar in principle and considerably more codified in practice. Understanding this framework is now a prerequisite for serious due diligence, not an afterthought.
Türkiye's Building Code Since 2018
The current national standard, TBDY 2018 (Turkish Building Earthquake Code), governs structural design for new construction and applies stricter load calculations, soil-structure interaction requirements, and material specifications than the code it replaced. Every municipality now requires a soil survey (zemin etüdü) before permits are issued, and the resulting geotechnical report determines foundation design and permissible building height on that specific parcel. For a Saudi investor comparing two otherwise similar plots, the underlying soil report can be more decisive to long-term structural performance than the sale price per square meter.
Since 2011, an independent construction supervision system (yapı denetim) has been mandatory for most new buildings. Licensed, third-party supervision firms, separate from the developer and separate from the municipality, sign off on structural stages before construction proceeds. This is a meaningful protection for foreign buyers, because it means the developer is not the sole party attesting to code compliance. Requesting the yapı denetim firm's name, license status, and inspection records for a specific project is a legitimate and increasingly standard part of due diligence.
What This Means for Site Selection
Türkiye's seismic hazard varies significantly by region and even by district within a single city. Istanbul sits near the North Anatolian Fault and carries elevated risk in its western and southern districts closer to the Marmara Sea, while inland and northern districts generally present more favorable soil conditions. This is not a reason to avoid Istanbul, which remains the country's deepest and most liquid real estate market, but it is a reason to treat seismic risk as one input into district selection alongside yield, infrastructure, and resale liquidity.
Coastal and southern cities popular with Gulf investors, including parts of the Aegean and Mediterranean coast, sit in their own hazard zones with codes calibrated accordingly. A Saudi investor should ask any advisor or agent for the specific seismic zone classification of a parcel, not a general statement about the city's overall risk profile.
Due Diligence Steps Worth Requesting
For any building completed after 2019, request the structural project file, the soil survey report, and documentation confirming yapı denetim sign-off at each construction stage. For older buildings, particularly stock built before 2000, structural condition should be assessed independently before purchase, since older buildings predate the current code and may not have been retrofitted. Türkiye's compulsory earthquake insurance scheme, DASK, covers a portion of rebuilding cost for residential structures and is a useful reference point, but it is not a substitute for structural due diligence, since DASK coverage caps are set well below full replacement value on higher-value properties.
Buyers should also confirm whether a building has undergone kentsel dönüşüm, the government-backed urban transformation process that replaces or reinforces older stock in earthquake-vulnerable areas. Properties inside an active transformation zone can carry both opportunity, in the form of future redevelopment upside, and near-term uncertainty around timelines and compensation structures.
A Practical Framework
Seismic due diligence in Türkiye is a documentation exercise more than a technical one for most investors. The soil report, the supervision file, and the completion date relative to the 2018 code give a clear picture of a building's structural standing. Saudi investors who build this review into their acquisition process, alongside the usual title and zoning checks, are better positioned to hold assets through Türkiye's ongoing regulatory tightening rather than being caught by it. As enforcement continues to strengthen following the 2023 earthquakes, buildings with clean structural documentation are also likely to command a growing premium on resale, making this diligence a value driver as well as a risk control.