K6 Architects

What K6 Architects does

K6 Architects (legal name: K6 Architects PartGmbB Kohnen & Steinwachs) is a privately held German architecture partnership founded in 2011 and headquartered at Heinrichstrasse 155, Düsseldorf. The firm provides architectural design and master planning services across commercial, residential, hospitality, sports, and public infrastructure projects, with an operational footprint spanning Berlin, Düsseldorf, Cologne-Bonn, Leipzig, Heinsberg, Tuttlingen, and Bielefeld. It targets three primary client groups: corporate and commercial enterprises requiring headquarters and office buildings; real estate developers pursuing residential and mixed-use projects; and public or government institutions commissioning infrastructure such as airport facilities.

The firm's technical differentiator is its expertise in wood-hybrid high-rise construction, a method combining timber with conventional building materials for sustainable development. Its flagship SPARK Berlin wood-hybrid skyscraper is designed to exceed DGNB gold certification requirements, and the completed SCALE Berlin startup high-rise (October 2022) demonstrates its capability in commercial high-rise delivery, including distinctive facade design (a Polaroid-collage referencing Berlin's startup scene). Other technical competencies include complex aviation infrastructure (the 172-meter Cologne-Bonn Airport transfer corridor T1-T2), sustainable campus design (Econovation Center, Bielefeld), and full-scope project delivery from competition entry through planning applications to completion. The firm has secured 1st-prize competition wins in Düsseldorf (Craftsmen's Place, four plots) and Bielefeld (Econovation Center).

K6 operates as a boutique professional services firm on a quote-based engagement model, monetizing architectural services for individual projects via direct enterprise commissions and architectural competition submissions. Revenue is generated per project rather than through recurring or subscription contracts; pricing is not publicly disclosed. The firm is independently owned by its founding partners (Kohnen & Steinwachs) with no external investment or parent company involvement indicated. Marketing is conducted primarily through a website portfolio showcasing completed and ongoing work, with no reported partnerships, integrations, or technology platform beyond standard web presence.

Name

K6 Architects

Legal name

K6 Architects PartGmbB Kohnen & Steinwachs

Website

https://k6architekten.de

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

1–10 employees

Short description

K6 Architects is a Düsseldorf-based architecture partnership (PartGmbB Kohnen & Steinwachs) specializing in sustainable wood-hybrid high-rise construction, commercial headquarters, residential, and public infrastructure design across Germany, serving corporate, developer, and government clients.

Ownership category

akta.pro rank

Product category

Architectural Services

NAICS

Architectural Services (54131), Architectural Services (541310)

akta.pro primary industry

Architectural Design Services (BPAHAKAA)

akta.pro secondary industries

Sustainable/Green Building & LEED Consulting (BPAHAKAG), Landscape Architecture & Site Design (BPAHAKAC)

Keywords

• Architectural design services
• Wood-hybrid construction
• Sustainable architecture
• Commercial building design
• Master planning services

Headquarters

HQ city

Düsseldorf

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales

Revenue model

1. Architectural Services: Architecture and design services for commercial, residential, and public buildings, including competition submissions, planning applications, and full project design

Distribution channels1 record

Marketing channels1 record

Core offering

K6 Architects is a German architecture firm providing architectural design and master planning services for commercial, residential, hospitality, sports, and public/infrastructure projects. The firm is particularly recognized for its wood-hybrid high-rise construction method and DGNB-certified sustainable architecture, delivering projects from competition submissions through planning applications to full project design across German cities.

Product overview

K6 Architects is a German architecture firm (PartGmbB Kohnen & Steinwachs) offering architectural design services across multiple project categories including commercial office buildings, high-rise residential and commercial structures, hospitality (hotels), sports facilities, and airport infrastructure. Their portfolio includes completed projects and ongoing developments across German cities including Berlin, Düsseldorf, Cologne, Leipzig, Bielefeld, Heinsberg, and Tuttlingen. The firm specializes in sustainable wood-hybrid construction methods and holds DGNB certification standards. Their named projects include SCALE (Berlin startup high-rise completed 2022), SPARK (wood-hybrid high-rise under construction), and various commercial, residential, and public buildings. Projects are documented on their website with visual portfolios and descriptions.

Differentiator

Problem solved

Functional benefit

Products and services

• SCALE Berlin A Berlin startup high-rise building completed in October 2022, featuring a distinctive facade design with a collage of different Polaroid formats displaying imagery from Berlin's startup scene.
• SPARK Berlin Wood-Hybrid High-Rise The firm's first wood-hybrid high-rise building currently under construction in Berlin, designed for consistent sustainability exceeding DGNB gold certification requirements.
• Transfer Gear T1-T2 (Cologne-Bonn Airport) 172-meter long and 4.5-meter wide connecting corridor between Terminal 2 and Terminal 1/C-Stern at Cologne-Bonn Airport, featuring fully glazed facades on both sides with differently colored glasses to prevent corridor shine effects.
• Technip Headquarters Düsseldorf Head office building for French high-tech company Technip in Düsseldorf, featuring shifting and interlinking white bands on the facade conveying development dynamics, with a spacious entrance hall and flexibly usable linear campus area.
• Ice Rink Benrath Ice rink facility in Düsseldorf featuring a monolithic hall structure with cast glass facade, housing a 60/30m ice surface for public skating, school sports, figure skating, and ice hockey, with nested cube design reminiscent of breaking ice shelves.
• Econovation Center Bielefeld Competition first prize winning project in Bielefeld, designed as a campus-like structure with landscaped green spaces, serving as a new calling card for the Bielefeld location at the entrance to Kupferhammer.

Quantifiable outcome

• Wood-hybrid construction exceeding DGNB gold certification requirements

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Max Dudler Architekten: German architecture firm with portfolio in office buildings, cultural facilities, and urban projects. Comparable in size and German-market focus.
• HPP Architects: German architecture firm with a comparable mix of office, commercial, and public-sector projects. Comparable in scope of services and project types (corporate HQs, sports, infrastructure) and operates in the same German market.
• Coop Himmelb(l)au: Austrian architecture firm with strong track record in innovative high-rise and commercial buildings. Comparable in design-led approach to complex commercial and high-rise projects.
• Behnisch Architekten: German architecture firm with strong sustainability and education/public building portfolio. Comparable in sustainable design philosophy and mid-sized firm profile.
• Barkow Leibinger: Berlin-based architecture firm known for innovative commercial, industrial, and high-rise projects. Similar in size and reputation for design-forward commercial architecture.
• Ingenhoven Architects: German architecture firm internationally recognized for sustainable, high-rise, and innovative facade design. Closely comparable in sustainability focus and high-rise expertise, with deeper international reach.
• Hascher Jehle Architektur: Berlin-based architecture firm with portfolio in commercial, office, and public projects. Similar mid-sized firm profile and German-market focus.
• Sauerbruch Hatt: Berlin-based mid-sized architecture firm with portfolio spanning cultural, commercial, and office buildings. Similar firm size and German-market focus with comparable project types.

Broad incumbents

• David Chipperfield Architects: Internationally renowned architecture firm with major Berlin offices and projects. Overlaps in German market, high-end commercial and cultural projects, and sustainability credentials.
• gmp Architects: One of Germany's largest architecture firms, with extensive portfolio in stadiums, public buildings, and high-rise office projects. Broader scale and global footprint but overlapping in German commercial and public-sector work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks4 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about K6 Architects