For over forty years
Yannick Costechareyre
Author of Sageocracy · Founder of Irrinium and a Laboratoire Conscientiel
Active in building and character real estate
Designing, transmitting and connecting: from building to thought.
Who I am
I do not reduce to a single profession. For more than forty years, I have designed, transmitted and connected: buildings, places, ideas.
I first learned to read matter: a civil engineering draughtsman, I cut my teeth in design offices and on major construction sites, alongside architects. But another attentiveness has always accompanied me: that of the balance of people and places; the way a space sustains or hinders those who inhabit it. Reading matter, tending to the balance of places: two sides of a single way of seeing.
This twofold attentiveness has carried my whole path: from construction to character real estate, developed under the Irrinium name I founded in 1998, then research on the dynamics that hold a collective together. Sageocracy is its written synthesis: a thought born of the field, never of paper alone.
A trajectory
From the built to the thought
More than forty years, a single movement. Here are the milestones that led me to the book.
The built, and attention to balance
A civil engineering draughtsman, in design offices and on major construction sites. In parallel, a long-standing attention to the balance of places and those who live in them.
Construction, from plan to field
Draughtsman, then plan design, land research and project support alongside architects: architecture placed at the service of well-being.
Founding of Irrinium
Irrinium is born of a conviction matured over the years: a place is never neutral. Quality homes, designed with an architect, attuned to their site and to the balance of those who live in them: a standard that would remain the house’s signature.
Character real estate
Irrinium obtains its professional licences and devotes itself to the transmission of distinctive homes and estates steeped in history. An internet pioneer, I extend its reach from national to international.
An international real estate portal
I launch an international real estate portal, run in parallel with Irrinium. With my son, a little under three years of design: halted by the service provider’s failure, but an invaluable education.
Laboratoire Conscientiel
A research space on consciousness: attention, perception, human and collective dynamics. Without dogma.
Sageocracy
The book that gathers the thought born of this whole journey. Text completed in 2026; to be published in French in September 2027 by an independent publishing house.
The Irrinium universe
My activities
Four activities connected by a single standard: writing, to which I now devote myself, and three crafts, each evolving with its own logic and rhythm, brought together under Irrinium since 1998. Discover Irrinium →
01 · Writing
Writing
My main activity today: giving form to the thought born of this journey. A first book, Sageocracy, to be published in French in September 2027; I am already thinking about a second.
“To write is to make shareable what took years to understand.”
Read the writings →02 · Original craft
Irrinium Real Estate
Character real estate: accompanying the transmission of distinctive homes and estates steeped in history; down to the reading and arrangement of spaces.
“A property steeped in history is not sold, it is passed on.”
See the real estate →03 · Research
Laboratoire Conscientiel
A research space on consciousness: attention, perception and human and collective dynamics. Without dogma or belief.
“When perception is accurate, analysis becomes obvious.”
Visit the Laboratory →04 · Digital
Web Harmonie
Digital architecture and research on new systems of exchange, designed to serve the collective.
“Digital in the service of meaning, never the reverse.”
Explore Web Harmonie →Underlying this whole journey, a conviction I impose on no one: consciousness is not a by-product of matter; it is its source. That is where, for me, everything connects.
French edition · September 2027
The culmination
Sageocracy
Toward a society founded on an awareness of our bonds and respect for the living world.
It is from this conviction that the book was born. Not a utopia, nor an ideology: a proposal for governance by lucidity rather than by power; the fully realised form of a thought born of the field.
Before the book, the writings
Latest writings
-
A Garden Is Not a Backdrop: Designing a Restorative Path
A restorative garden is not designed the way we compose a picture: from the living-room window, head-on, once and for all. But a garden is not looked at.…
-
Circulation: What Your Daily Paths Reveal About a Place
Flow in the home cannot be taken in at a glance: we look at a place the way we look at a photograph, head-on, motionless, from the doorway.…
-
Inhabiting a Place, Inhabiting Oneself
There is a very simple way to look at a place: you walk in, you observe, you judge. It is beautiful, well made, harmonious… on the surface. And…
Perception precedes power.
Recognising that this direction is right. Free, confidential (only totals by country are published), no obligation, no membership: simply a stance, and you can unregister at any time.