The Sustainable
Investment & Asset
Management GmbH

SI&AM GmbH is an owner-managed real estate investment specialist based in Düsseldorf and Frankfurt am Main.

With more than 30 years of experience in the investment and real estate sector, we look back on a well-founded history.

We have the best relationships in the real estate and investment world and have a very good track record.

Our creative and solution-oriented team of 10 employees as well as flat hierarchies enable fast decision-making and a structured division of labor.

We cover the complete life cycle of real estate – acquisition, asset and property management, further development.

Experience & quality

30 years

More than 30 years experience in the investment and real estate sector.

70 objects

More than 70 properties with 450 units in Germany in stock.

Strong partners

Investment companies and banks.

500 million

Managed real estate assets of over 500 million euros.


We are certified according to DIN EN ISO 9001:2015.

Large network

Large network of landlords, chain stores, corporations, financing companies, business developers, 24/7 hotline.

„We believe that through better understanding and energetic implementation we can achieve superior investment results over the long term.“

Arno Welskopf, Managing Director

Responsibility & sustainability

ESG in real estate investments

Environmental, social and governance (ESG) factors have become an essential part of property management, such as energy efficiency, water consumption, CO2 emissions, building materials, building equipment, operating costs.

Development potential of real estate

Amendment of the Terms of Use/Extensions.

Selection of locations with development potential, e.g. subsequent achievement of higher KFW standards.

Responsible choice of tenants

Leasing with consideration of investor interests and credit ratings.

Investment in properties in demand

Affordable properties with long-term cash flow and medium to long-term letting.

Are you interested in our funds?
Wonderful, why not arrange a consultation appointment directly!

    Please let us know when it is best to contact you by phone to advise you on the relevant funds.

    We look forward to you!