Earthquake Regulations and Building Age in Sarıyer: A Buyer's Checklist

Why we need to talk about building age and regulations

Sarıyer holds an unusually wide range of building stock, from Bosphorus-facing mansions to brand new gated developments. That variety is part of the district's charm, but it also creates a challenge for buyers: which earthquake regulation was this building constructed under, and how safe is it today?

When people buy a home, most of the attention goes to the view, the floor plan and the price. Those things matter, but the structural system and the standards in force when the building went up can be the most decisive factor over the long run. In this article I want to turn that process into a simple checklist.

Three important turning points in Turkey

When you assess building age, keeping three dates in mind makes everything easier:

• Before 1999: The 1975 regulation was in force. The 1999 Marmara earthquake led to a broad reassessment of much of the existing building stock.
• Between 2000 and 2018: The regulations updated in 1998 and afterwards applied. The building inspection system spread from 2001 onwards, which marks an important threshold in construction quality.
• After 2018: The Turkish Building Earthquake Code is in effect. This is the most comprehensive and up to date standard to date.

These dates are not hard boundaries. The permit date, the period when the project was drawn and the actual construction date can all differ. That is why saying "it's a 2015 building" is not enough; you need to look at the paperwork.

Points specific to Sarıyer

Ground conditions in Sarıyer vary significantly from one area to another. The coastal strip, the stream beds and the hillside areas all behave differently. Two buildings of the same age are not equal in earthquake performance if one sits on solid rock and the other on fill.

The district also has a large number of buildings constructed on sloping land. On a slope, if the foundation solution, the retaining walls and the floor layout were not designed properly, that can become a source of risk. For buildings like these, an inspection by an engineer matters even more.

Documents to check before you buy

To read a building's history, ask for the following documents:

• İskan (the occupancy permit): This shows the building was completed in line with its permit. Be careful with any property that does not have one.
• Construction permit and permit date: This tells you which regulatory period the building falls under.
• Building inspection reports: For buildings constructed after 2001, the inspection company will have process reports on file.
• Approved architectural and structural drawings: If you want a performance analysis carried out, these drawings are essential.
• Soil survey report: This gives you an idea of the ground's bearing capacity and seismic behaviour.

You can usually obtain these through the seller, the building manager or the relevant municipality. If something is missing, that fact needs to feed into your negotiation and your decision.

Age isn't everything: maintenance and alterations

Even a building constructed under the current code can be weakened by poorly executed alterations made later. The most common problems are:

• Load bearing columns or shear walls being cut into or drilled through
• Columns removed on the ground floor to create retail space
• Unpermitted floors or extensions added
• Reinforcement corrosion caused by weak waterproofing

So the "new building" label alone should not put your mind at rest. You also need to observe the physical condition of the apartment and the common areas.

Older buildings and the prospect of urban renewal

Many older buildings in prime Sarıyer locations attract interest because of their redevelopment potential. Here is the point to be careful about: renewal is a possibility, not a guarantee. The number of owners, how the land shares are distributed, the zoning status and whether the neighbours can agree all determine how fast the process moves.

If you are buying an older building with renewal in mind, you need to assess realistically how much of that expectation is already priced in today. A purchase built on overly optimistic assumptions can lead to disappointment later. It should be evaluated together with current zoning and comparable sales data.

A practical checklist

Before you decide, ask yourself:

• What are the building's permit and occupancy permit dates? Which regulatory period do they fall into?
• Is there a soil survey, and what is the ground like in that area?
• Has the structural system been altered after construction?
• Is an independent engineering inspection possible?
• If it is an older building, how realistic is the renewal scenario?

When you cannot get clear answers to these questions, the best move is not to rush. Earthquake safety is one of those things that is very hard to put right after the fact.

Conclusion

Building age is an important signal, but it is not enough on its own. The regulatory period, the ground, the quality of the project, the maintenance history and any later alterations all need to be read together. In a district like Sarıyer, where both ground conditions and building types vary so much, this holistic view is even more critical.

If you would like to move forward with an advisor, you can reach Müjgan Şimşek through the site to gather the right documents and manage the process with confidence.