Network

In real estate and corporate law, further advice is often required in addition to the lawyer. I personally know the companies listed here well:

Estate agents
Premises and apartments do not come to you out of the blue.
Martin Groszewski, Groszewski Real Estate http://www.groszewski-re.com/

Tax consultant
Always make sure the tax structure of your transactions are in order.
Dietmar Schramm, Tax Advisor: http://www.schramm-stb.de/content/start/index.html
Lars Hansen, Tax Consultant, Auditor: http://www.hansen-schulz.de/steuerberatungsgesellschaft.html

Banking
Money is not everything, but often necessary.
Stefan Böning, Head of Business Customer Advisory Centre, Commerzbank Berlin.

Notary
Certification is often mandatory. I have been working with good notaries for a long time and can arrange an appointment for you.

Building Management
Making sure you realise your property’s maximum value.
Simax Immobilien GmbH: http://www.simax-immobilien.de/index.php/start