YerAna develops buildings and land as single working systems — structure, air, water, energy and land designed together, so that each part supports the others. Its first project, Atlı House, is certified to the Passive House Plus standard.
Modern life is more fragile than it looks. Energy, water and food arrive from far away, and every shock to the systems that deliver them — economic or environmental — reaches the individual household in the end.
Most buildings do nothing about that. They are designed to the minimum a regulation will accept, and they consume whatever they are given. We think a building should do more: need very little, generate what it can, and work with its land rather than against it — so that its energy, water and waste feed one another instead of being handled as separate problems.
Every project starts from its own site and the people it is for. None is repeated from a template.
No single discipline can deliver that. Architects, engineers and builders each bring their part; in our approach, the team lead's work is to make sure every decision serves the whole, so that the building, the land and its systems work as one.
Real estate fit for the new world.
YerAna began as a conversation between two friends. Efe Atlı and Sarper Çelenk met at school in İstanbul in 2000 and spent the next twenty years debating how people should live — and sketching projects they might one day build together, starting, even then, with green energy for homes in Türkiye.
The first real work was about food. From 2019 Efe worked on sustainable food production: insect protein first, then aquaponics, each designed as a closed loop that produced its own inputs. Researching those loops led him to permaculture — a design discipline that had already worked out much of what he had set out to learn — and to a Permaculture Design Certificate.
Permaculture made the idea bigger than a farm. YerAna was founded in 2020, and after most of a year searching, the land was found in Şile, outside İstanbul. Its economics changed the order of things: rather than start with production and grow into a place to live, YerAna would first build one high-performance, independently certified building on that land, and learn from it.
That building is Atlı House. It was certified to the Passive House Plus standard in February 2025. It is YerAna's home, its office, and the place where its next projects are developed.
The first project
Europe's first Passive House Plus building to combine a home with a professional kitchen.
A house and professional kitchen on a sloping site, designed by Studio Mada, built by Monta, with Passive House design and certification led by Cihan Çelik. The project page sets out how it works, what was measured, and what did not work the first time.
Atlı House is the first project, not a model to be repeated. What it taught us — the engineering, the evidence, and the correction — is the starting point for what follows: homes, boutique hotels and hospitality places, each shaped by its own land and by the people it is for.