Discover Harnois group
In 1975, Georges Harnois has upset many misconceptions, being the inventor of attics transformation processes and the creator of a new profession. The Harnois process now represents 80% of the attics market in France.
Number 1 in the profession he has created himself, Georges Harnois has surrounded himself with trained professionals located throughout France.
Learn how to install a real watertight underground cellar in your home in a few days.
A true national network of independent firms, the exclusive concessionaires of Groupe Harnois are primarily Créateurs d’Espace ®. They are professionals who will advise you and help you realize your project.
« Each project is subject to a thorough review and specifications. »
This is a national network of independent companies entirely dedicated to Processes and The Harnois Charter, thus offering the guarantees of the national’s 1st habitable space creation.
We are real creators of space. All of our experience is at your disposal, Harnois processes ally tradition and modernity. The techniques we use have been developed by a true framing professional, carpenter himself for over thirty years.
This partnership therefore allows multiple human sized agencies, it is so we can listen to you and your projects.
TCH ALPES of Harnois network offers services in the following departments: 74, 73, 38, 69, 01
M € in turnover
thousands of cellars
years of experience
1981International launchAn advertising campaign, cellars associated with attics, provides the international launch of Harnois processes.
1979International Construction Industry Trade FairThe Interational Construction Industry Trade Fair of 1979 awards the best innovation award to the Harnois cellar.
1979HARNOIS becomes a brandHARNOIS is a registered trademark, backed by a national network of companies.
1975The company’s creationIn 1975, Georges Harnois has upset many misconceptions, being the inventor of attics transformation processes and the creator of a new profession. The Harnois process now represents 80% of the attics market in France.