Contact data

Phone: +49 2161 811-627

Fax: +49 2161 811-777



Dr Matthias Diete

Tax consultant


  • Tax law
  • Construction contracts
  • Real estate law
  • Commercial lease law
  • Mediation/alternative dispute resolution

Dr Diete advises principals and contractors on all questions of private construction law.  A further key area of his practice is the provision of advice in real estate and commercial lease law. Dr Diete also advises principals and contractors on questions of out-of-court conflict resolution and tax law as well as in the area of facility and property management.


Recent work

  • Tax advice provided to various major concerns, in particular on issues relating to value added tax


Publications (in German) 


Events (in German)

Curriculum vitae

  • Studied law at the University of Regensburg, 2002 to 2007
  • Legal clerkship with the Higher Regional Court of Düsseldorf, worked at a law firm specialising in construction law in Düsseldorf with a three-month internship at a law firm specialising in international comparative law in Sydney (Australia), 2007 to 2009
  • PhD on international tax law at the University of Düsseldorf, 2010 to 2013
  • Admitted as a lawyer, 2010
  • Research assistant in the area of tax law with an international law firm and an international auditing company in Düsseldorf and Munich, 2009 to 2011
  • Lawyer with a law firm specialising in value added tax law in Munich, 2012 to 2013
  • Lawyer (Rechtsanwalt) at Kapellmann since 2013
  • Tax consultant since 2018