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Your real estate partner in Freiburg and the region Real estate sale / purchase Rental of commercial and residential real estate Renovation concepts Free real estate valuation We look forward to your inquiries.

real estate sale

Even in the current market situation, we sell successfully and usually above market value. Our special strategy makes this possible. We would be happy to advise you on these topics in a non-binding initial meeting.
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real estate rental

One of our strengths is the rental of commercial and residential properties of all sizes, types and locations. We also take care of the management of your property/s together with our cooperation partners.
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renovation concepts

Would you like to renovate, refurbish, convert or redesign your property? We create concepts, plan your project and coordinate all work with qualified business partners from our long-standing network.
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voices of our customers

During this difficult time (2023), Mr. Stephan sold our property 18% above the market value. Recommended for sellers.

Sonja Rademacher - Grunern

2022 Rental of my commercial space in Emmendingen. Thanks

C.E.Scheidt - Freiburg

Mr. Stephan sold my family home in Bonnorf in 2022 as promised before the sale, promptly and at the desired selling price. I can only recommend!

Frank Maier - Bonndorf

In 2020 I was brokered an apartment building in Freiburg via SI-konzepte eK. Mr. Stephan then accompanied us during all the conversion work on this property.

100% recommended.


Saskia Walther - Freiburg

Mr. Stephan has been looking after all of our apartment buildings in Gundelfingen for 15 years. Rental - renovation - management, everything from a single source!

G. Block / Block GmbH - Gundelfingen

I bought an apartment building in Staufen in 2017 through Mr. Stephan. Since then he has been looking after it with passion and also accompanies all conversion measures. SI concepts keeps what it promises ;-) Thank you for your commitment.

Josef Heintges-Hinterzarten

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