What Dittel Architekten does

Dittel Architekten (legally DIA - Dittel Assoziierte GmbH) is a Stuttgart-headquartered, owner-managed architecture and interior design firm founded in 2005. The firm delivers integrated services spanning architecture (Architektur), interior design (Innenarchitektur), general planning (Generalplanung), project management (Projektsteuerung), construction monitoring (Baumanagement), building redevelopment (Bauen im Bestand), and feasibility studies (Machbarkeitsstudien), covering all project phases from initial concept through construction completion. Its core technology is human-led spatial design — combining brand-identity translation, heritage-sensitive redevelopment expertise, and disciplined project management rather than software platforms or proprietary IP.

The firm's client base is concentrated in German enterprise and public-sector accounts, with notable long-running relationships including Breuninger (at least eight documented engagements since 2013 across customer service, canteen, textile facade, flagship Hamburg, b_place pop-up, and Herrenabteilung), WGV (7,300 sqm Stuttgart customer service center), Siemens Healthineers (HEP Center Forchheim), Husqvarna Group (10,000+ sqm hybrid workspace in Ulm), Tim Raue (Sphere restaurant at 207 m in the Berlin TV Tower), and Sansibar by Breuninger (Stuttgart and Düsseldorf). Public-sector work includes Stadtbibliothek Heilbronn and the heritage-listed Kulturareal Hahnekiez in Schlitz.

Revenue is generated exclusively through project-based professional services commissions, acquired primarily via architecture competitions and direct enterprise negotiation. DIA operates with no disclosed external investors, no subsidiaries, and no reseller or channel-partner distribution, and is led by Managing Director (Geschäftsführer) Frank Dittel. Geographic delivery spans Stuttgart, Berlin, Ulm, Heilbronn, Düsseldorf, Friedrichshafen, Karlsruhe, and Hamburg, with a marketing footprint sustained through trade publications (Rolling Pin, Office+Object, bdia Handbuch, AIT, md Mag, Fizzz) and a consistent record of recognition from German Design Council, iF International Forum Design, Red Dot, and Best Workspaces.

Name

Dittel Architekten

Legal name

DIA - Dittel Assoziierte GmbH

Website

https://di-a.de

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

11–50 employees

Short description

Dittel Architekten (DIA) is a Stuttgart-based, owner-managed architecture and interior design firm serving German enterprise and public-sector clients with integrated services from feasibility through construction. It is known for award-winning brand-driven spaces including WGV Stuttgart, Breuninger retail, Sphere Tim Raue, and heritage redevelopments.

Ownership category

akta.pro rank

Product category

Architectural and Interior Design Services

NAICS

Architectural Services (541310), Interior Design Services (54141)

akta.pro primary industry

Interior Design Services (BPAHAKAB)

akta.pro secondary industry

Exhibition, Retail & Experiential Design (BPAHAKAL)

Keywords

• Architectural design services
• Interior design services
• General planning services
• Building redevelopment
• Workspace design

Headquarters

HQ city

Stuttgart

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Architecture and Interior Design Services: DIA generates revenue by providing architecture and interior design services for commercial, hospitality, retail, public, and cultural projects. Revenue is project-based, typically through direct commissions from enterprise clients following architecture competitions or direct negotiation. Services span all phases from feasibility studies through construction completion.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

DIA - Dittel Assoziierte GmbH is a Stuttgart-based architecture and interior design firm delivering integrated design services across all project phases — from feasibility studies through general planning, project management, construction monitoring, and building redevelopment — for working environments, hotels, restaurants, retail, cultural, and public buildings. Services are commissioned primarily by large enterprise clients (e.g., WGV, Breuninger, Siemens Healthineers, Husqvarna Group) and municipalities via architecture competitions and direct engagement.

Product overview

DIA - Dittel Assoziierte GmbH is a Stuttgart-based architecture and interior design firm offering comprehensive services from initial feasibility studies through construction completion. The core services include Architecture (Architektur), Interior Design (Innenarchitektur), General Planning (Generalplanung), Building Redevelopment (Bauen im Bestand), Project Management (Projektsteuerung), Construction Monitoring (Baumanagement), and Feasibility Studies (Machbarkeitsstudien). Their project portfolio spans five main categories: Working Environments (Arbeitswelten), Hotels, Restaurants/Gastronomy (Gastronomie), Retail, and Culture & Education (Kultur & Bildung). Notable projects include the WGV Kundenservice Stuttgart (awarded Iconic Awards 2024, German Design Award 2025, iF Design Award 2025), the Sphere Tim Raue restaurant in Berlin's TV Tower, the Husqvarna Group office concept in Ulm, the Breuninger retail projects including the textile facade and b_place pop-up concept, and the Kulturareal Hahnekiez cultural center. The firm takes a holistic approach, considering buildings from inside-out and outside-in, with emphasis on aesthetics, function, context, and sustainability.

Differentiator

Problem solved

Functional benefit

Products and services

• Architektur (Architecture)

Quantifiable outcome

• WGV Kundenservice Stuttgart selected as Top 50 Best Workspaces 2025 by independent expert jury (Best Workspaces Award)
• +4 more outcomes

Named customers10 records

Segments2 records

Ideal customer profiles2 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Pfarré Lighting Design (Munich)minorStrategic or Co-development PartnerDIA collaborated with Pfarré Lighting Design for lighting planning on the WGV Kundenservice Stuttgart project. Pfarré designed the comprehensive lighting concept including floor-level lisenes, accent lights, and area-specific illumination throughout the customer service center.

Scale indicators9 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Gensler: Global architecture and design firm operating across workplace, hospitality, retail, and cultural sectors. Competes with DIA on enterprise mandates but at vastly greater scale; represents the global incumbent tier DIA must position against for premium enterprise commissions.
• Hirsch Bedner Associates (HBA): Global hospitality-focused interior design firm with deep restaurant, hotel, and luxury retail expertise. Direct overlap with DIA's gastronomy and hospitality practice (Sphere Tim Raue, Sansibar, Eduard's Bar) at much larger global scale.
• UNStudio: International architecture firm with strong cultural, public, and commercial portfolio. Comparable to DIA on design-led approach and cultural/civic project typology, but operates at broader geographic and project scale.

Direct peers

• RKW Architekten: German architecture firm with deep German enterprise footprint and integrated interior design services. Comparable to DIA on full-service delivery, project scale, and German commercial/cultural clientele.
• Blocher Partners: Stuttgart-based architecture, interior, and brand design firm with similar integrated offering and retail/commercial client base. Highly comparable to DIA on city, service scope, and German enterprise clientele.
• JSK Architekten: Düsseldorf-based architecture and interior design firm serving commercial, hospitality, and cultural clients. Comparable scale and service offering to DIA with overlapping competition on enterprise workspace and retail mandates.
• Ippolito Fleitz Group: Stuttgart-based identity-driven architecture, interior design, and communication design practice. Closely comparable to DIA on geography (same city), service mix (architecture + interior design under one roof), and enterprise clientele across retail, hospitality, and workspaces.
• haascookzemmrich STUDIO2050: Stuttgart-based architecture practice with comparable scope across commercial, cultural, and public buildings. Closely matches DIA's geographic footprint and project typology mix (working environments, culture, public buildings).
• HPP Architekten: German architecture and interior design firm (Düsseldorf/Cologne) with comparable combined architecture + interior capabilities and enterprise focus. Direct competitor for many of DIA's commercial, hospitality, and cultural mandates in Germany.
• 3deluxe: Wiesbaden-based design and architecture practice with strong hospitality, retail, and experiential design portfolio. Comparable to DIA on cross-sector design excellence, particularly in gastronomy and retail experience work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

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 Dittel Architekten