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70% of existing real estate will still be there in 2050.

We make real estate portfolios fossil-free.

Discover our 5-step plan

Planning the path to climate neutrality

Factor4 specializes in energy efficiency, renewable energy, maintenance and comfort for non-residential buildings, industry, residential areas and apartment buildings.

Factor4 guides companies and governments with a wide range of services including assessments, strategy development, implementation processes, verification of the results and ESG reporting.


Bart De Bruyne

Factor 4 consists of a group of specialists who succeed in tackling 'the elephant', piece by piece, with a lot of attention to pragmatics and feasibility, without losing sight of the ultimate goal. A strong symbiosis of theory and practice!!

ir. Bruno Janssen

Director Real Estate & Facilities

Interested in a collaboration?

Let us know how we can help!

Are you the expert we are looking for?

Take a look at our open vacancies via the button below.