Lawyer profile
Martin Hahn
Certified specialist in public procurement law (Fachanwalt für Vergaberecht), Lenz und Johlen RAe PartGmbB, Cologne
- Checked in the official register of the German Federal Bar (BRAK) on 12 October 2026
- Overall rating 4.1 of 5
, from 31 reviews of the firm
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At a glance
- Languages
- English
- Focus areas
- Architects' law (Architektenrecht), Private construction law (Baurecht (privates)), Commercial tenancy law (Gewerberaummietrecht), Real property law (Grundstücksrecht), Public procurement law (Vergaberecht)
- Opening hours
- Monday 08:00 to 18:00
- Tuesday 08:00 to 18:00
- Wednesday 08:00 to 18:00
- Thursday 08:00 to 18:00
- Friday 08:00 to 18:00
- 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
4.1 of 5 Overall rating from 31 reviews on 2 platforms. How we calculate the overall rating
| Platform | Rating | Reviews | As of |
|---|---|---|---|
| Gelbe Seiten | 3.7 of 5 | 3 | 12 October 2026 not counted separately: shares its reviews with golocal, counted only once |
| golocal | 3.7 of 5 | 3 | 12 October 2026 |
| 4.2 of 5 | 28 | 16 October 2026 |
These reviews apply to the firm, not to individual lawyers.
Details from the official lawyer register
- Name
- Martin Hahn
- Professional title
- Lawyer (Rechtsanwalt)
- Specialist titles
- Certified specialist in public procurement law (Fachanwalt für Vergaberecht)
- Regional bar association
- Köln
- Admitted since
- 11 May 2010
- Law firm
- Lenz und Johlen RAe PartGmbB
- Firm address
- Gustav-Heinemann-Ufer 88, 50968 Köln
- Phone
- 0221-97300265
- Fax
- 0221-97300222
- m.hahn@lenz-johlen.de
- Identifier in the special electronic lawyer mailbox (beA)
- DE.BRAK.d1e2e71d-a35f-4163-8692-4b6542684efe.85e3
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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