Filling values with life sustainbly

Under a single roof, the Family Office manages the various companies and holdings of the Gröner family

Filling values with life sustainbly

Under a single roof, the Family Office manages the various companies and holdings of the Gröner family

The company

SAS Gröner Family Office manages the assets, investments, and shareholdings of the Gröner family in France. Created in 2022, it is a subsidiary of the Gröner Family Office GmbH located in Germany.

Our goal is to develop and increase the value of a real estate portfolio on the Gulf of Saint Tropez.

In addition, we strive for a diversified portfolio that includes both residential and commercial real estate.

We deal with all phases of a property’s life cycle: acquisition, planning, renovation, management and administration. In addition to exploiting the individual potential of each property, we attach great importance to design, with a focus on sustainability and social added value.


SAS Gröner Family Office is a shareholder in several companies, allowing it to create synergies and optimize the development of its assets.

Our shareholdings

The SCI-companies hold the Gröner family’s real estate assets:
These properties are located in Saint-Tropez, Ramatuelle, Gassin and Le Lavandou and cover a spectrum ranging from studios to apartments in the city center to exclusive villas. We are also involved in companies specializing in the rental of commercial space, offices and employee housing.

SARL CG Batiment – general building company.
CG Batiment deals with the planning, renovation and all other construction work on our properties.

SAS CG Immobilier – real estate developer
CG Immobilier is involved in real estate development in line with our investment strategy.

Our partners

SARL Maison d’Azur
SARL Maison d’Azur, based in Saint-Tropez, manages and markets our vacation rental properties.

SARL Gröner Patrimoine
SARL Gröner Patrimoine manages our commercial properties. The company also looks after the vehicle fleet, the works of art and the janitor services.

SCEA Château Blanc
SCEA Château Blanc is a 130-hectare estate in the hinterland of the Département du Var, which is currently in the development phase and will in future offer agritourism around olive trees and vineyards as well as space for social projects.


Christoph Gröner

Christoph Gröner is CEO of Gröner Group AG, CEO of ecobuilding AG and founder of CG Elementum AG. As a leading entrepreneur in the real estate sector, he implements ecological responsibility towards future generations with his construction projects. Christoph Gröner founded his first real estate company in Karlsruhe in 1989. In the mid-1990s, he expanded to Leipzig and by 2010 already had nine branches nationwide. He focused on digitalization early on: he revolutionized the real estate sector in 2017 by using BIM (Building Information Modeling). In the course of this, he also focused on prefabrication and had the first prefabrication plant in Europe completed in 2020. With 25 years of experience in real estate development, Christoph Gröner founded the Gröner Group and its subsidiary CG Elementum in 2020. The aim of this internal service provider of the Gröner Group is the realization of quarters, called ecobuildings, which are almost climate-neutral in construction and operation.

Frank Gröner
Managing Director

Frank Gröner is Managing Director of Gröner Family Office GmbH. He has more than 30 years of management experience in engineering and real estate, including 10 years in the management of CG Gruppe AG. His core competencies lie in the areas of administration, controlling, human resources and business organization.

Jessica Brunnhuber
Project Manager

Jessica Brunnhuber is a project manager at SAS Gröner Family Office.

She has more than 15 years of experience in the hotel and catering industry.

Her skills enable her to implement challenging projects in collaboration with an international team to ensure a sustainable increase in the value of the assets.

Céline Squarra
Project Manager

Céline Squarra has been responsible for the development of investments and real estate in France since 2017.

Thanks to her experience in France and Germany, she is the link between the Gröner family and the teams and partners in France.

She is responsible for the purchase and sale of real estate, financing, personnel management and all administrative and legal matters.


Creating the future together.
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