Lawyer profile
Dr. Sebastian Helmut Sonnenberg
Certified specialist in inheritance law (Fachanwalt für Erbrecht), Certified specialist in insurance law (Fachanwalt für Versicherungsrecht), Rechtsanwälte Hillmann & Partner mbB, Oldenburg
- Checked in the official register of the German Federal Bar (BRAK) on 21 October 2026
- Overall rating 4.9 of 5
, from 350 reviews of the firm
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At a glance
- Languages
- English
- Focus areas
- Inheritance law (Erbrecht), Insurance law (Versicherungsrecht), Contract law (Vertragsrecht)
- Opening hours
- Monday 08:00 to 13:00, 14:30 to 18:00
- Tuesday 08:00 to 13:00, 14:30 to 18:00
- Wednesday 08:00 to 13:00, 14:30 to 18:00
- Thursday 08:00 to 13:00, 14:30 to 18:00
- Friday 08:00 to 13:00
- Saturday closed
- Sunday closed
Sources: Google, retrieved on 24 October 2026; Deutsche Anwaltauskunft des Deutschen Anwaltvereins, retrieved on 12 October 2026. Focus areas and opening hours are the lawyer's or firm's own words. Focus areas from the directories' fixed lists have an English label with the German term in brackets; all others stay in German.
Location of the firm
Reviews of the firm
4.9 of 5 Overall rating from 350 reviews on 1 platform. How we calculate the overall rating
Google
These reviews apply to the firm, not to individual lawyers.
Details from the official lawyer register
- Name
- Dr. Sebastian Helmut Sonnenberg
- Professional title
- Lawyer (Rechtsanwalt)
- Specialist titles
- Certified specialist in inheritance law (Fachanwalt für Erbrecht), Certified specialist in insurance law (Fachanwalt für Versicherungsrecht)
- Regional bar association
- Oldenburg
- Admitted since
- 10 January 2012
- First admission
- 20 January 2010
- Law firm
- Rechtsanwälte Hillmann & Partner mbB
- Firm address
- Gartenstr. 14, 26122 Oldenburg
- Phone
- 0441/3613330
- Fax
- 0441/31633322
- info@hillmann-partner.de
- Identifier in the special electronic lawyer mailbox (beA)
- DE.BRAK.147c2c14-09c0-443f-8f27-596d96c602e7.ffdf
Source: Official lawyer register of the German Federal Bar under section 31 of the Federal Lawyers' Act (BRAO). The register is kept in German. We show names and addresses as the register gives them and add an English description to German professional titles.
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