We are accredited and licensed to perform energy audits, report on CO2 footprints and we can help you offset your CO2 emissions.

Our services related to certification, reporting and offsetting include:

Mandatory energy audit

Mandatory energy audit

Large enterprises in the EU have to realize an energy audit. Factor4 can take care of this obligation. Not only in Belgium and the Netherlands, but in all EU countries

BREEAM (in use)

BREEAM measures the sustainability value of your building in a series of categories, ranging from energy to ecology. Factor4 consultants are licensed BREEAM assessors.

CO2 offsetting

CO2 emissions are offset by supporting certified climate projects. Our partner CO2logic is recognized as the Belgian expert in this field.

CO2 reporting

We report your CO2 footprint according to your preferred standard

GRI (Global Reporting Initiative),
EPRA sustainability (European Public Real Estate Association),
GRESB (Global Real Estate Sustainability Benchmark),


We help companies implement the “CO2 prestatieladder”, a tool that reports energy use and CO2 emissions and gives a competitive advantage for public procurement procedures.

Relevant projects

Our clients

Office in Belgium
Lange Winkelhaakstraat 26
B-2060 Antwerp
T +32 3 225 23 12
Find out here how to reach us and where to park.
You can leave your bike in a locked area in the building.


VAT 0884 068 589
IBAN: BE38 7380 3377 0772
RPR: Mechelen
Terms and conditions

Contact us