Rotor vzw-asbl

What Rotor vzw-asbl does

Rotor vzw-asbl is a Brussels-headquartered cooperative design practice founded in 2005 by Maarten Gielen, Tristan Boniver, Lionel Devlieger and Mia Schmallenbach. It investigates the organisation of the material environment with a focus on circular construction and the reuse of building components, blending research, design assistance, publications, exhibitions and education. Its service portfolio covers reuse assessments, strategy formulation, target-setting, scouting of reclaimed elements, bespoke specification writing and interior design around reclaimed materials, delivered to architects, building commissioners, public authorities and academic institutions.

Its core offering is a stack of proprietary tools, methodologies and partnerships rather than conventional software. Products include Opalis, an online directory documenting 1,500+ specialised reuse operators in Belgium, France, the Netherlands, the UK and Germany; the Reuse Toolkit with four innovative specification methods for reclaimed products; and the Reclamation Audit Guide for pre-demolition reuse assessments. The internal Rotor Database catalogues 200+ Belgian companies and their industrial leftovers. Major research outputs span the BBSM book 'Déconstruction et réemploi' (2017), the 'Urban Mine Inc.' chapter (Fraunhofer IRB Verlag, 2021), and 'Ad Hoc Baroque' (2023, reprinted 2024). Two flagship EU-funded projects — FCRBE (Interreg NWE, 2019-2023, €3.7M ERDF) and PREUSE (Interreg NWE, 2023-2028) — anchor a multi-country consortium including BBRI, Bellastock, CSTB, Salvo, University of Brighton, Construction Confederation, Bruxelles-Environnement, City of Utrecht, LIST and TU Delft. A separate cooperative, Rotor DC, was spun off in December 2016 to handle physical salvage and resale of components. The team consists of 16 current collaborators plus an extended network of 100+ project collaborators, with an executive board of Léa Bottani-Dechaud, Benjamin Lasserre and Sebastien Paulet.

The business model combines project-based professional services (design assistance and consultancy for enterprise clients such as Immobel, AG Insurance, Realco, Permeke Museum and Logement Bruxellois), publication sales through bookshops and international distributors (e.g., IDEA Books), educational fees from lectures and workshops at universities including AA School, TU Delft, ETH Zurich and Ghent University, and grant funding from public bodies including Interreg NWE, Bruxelles-Environnement, OVAM, ADEME and the Flemish Community. Pricing is quote-based and project-specific; no public pricing tiers exist. Co-location with Rotor DC at the 14,000 m² Da Vinci business park site (3 Avenue de Bâle, 1140 Brussels) provides direct physical access to a working salvage supply chain.

Name

Rotor vzw-asbl

Legal name

Rotor vzw-asbl

Website

https://rotordb.org

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

1–10 employees

Short description

Rotor vzw-asbl is a Brussels-based cooperative design practice founded in 2005 that provides research, design assistance, consultancy, publications and education services focused on circular construction and reuse of building components, serving architects, building commissioners, public authorities and academic institutions across Northwestern Europe.

Ownership category

akta.pro rank

Headquarters

HQ city

Brussels

HQ country

Belgium

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Design and Consultancy Services: Rotor provides design services and design assistance/consultancy to clients including identifying reusable elements, establishing reuse strategies, scouting reclaimed elements, and writing specifications for integrating reuse strategies.
2. Publications: Rotor publishes books, research findings, and educational materials on circular construction and material reuse. Publications are sold and distributed through bookstores and online platforms.
3. Spin-off Revenue (Rotor DC): Rotor DC, a separate cooperative company, generates revenue through the sale of salvaged building components. Rotor maintains close ties with Rotor DC, with offices located above Rotor DC's stocks.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Rotor vzw-asbl is a Brussels-based cooperative design practice that provides design, research, and consultancy services for circular construction and building material reuse. The firm assists architects, design teams, and building commissioners with integration of reclaimed components into new projects and develops tools, publications, and methodologies such as the Opalis supplier directory and the Reclamation Audit Guide.

Product overview

Rotor vzw-asbl is a cooperative design practice focused on circular construction and material reuse. The organization operates as a research, design, and consulting practice offering services in architecture, interior design, publications, exhibitions, and education. Key products include Opalis (online directory of salvage dealers), Rotor DC (spin-off cooperative selling salvaged building components), and various publications on reuse practices. The portfolio spans European research projects (FCRBE, PREUSE), practical tools (Reuse Toolkit, Reclamation Audit Guide), design assistance services, and educational programs. The organization was founded in 2005 and launched spin-off RotorDC in 2016.

Differentiator

Problem solved

Functional benefit

Products and services

• Architecture and Design Services Design assistance and architectural services for projects involving building material reuse, deconstruction, and circular construction. Targeted at architects, design teams, building owners, and public commissioners.
• Research and Consultancy Services Research, advisory, and consultancy engagements covering circular construction, material reuse, and pre-demolition auditing. Delivered to public authorities, EU-funded projects, and private clients.
• Opalis Online Directory Online directory of building component suppliers offering reclaimed and reusable materials. Used by architects, designers, and project teams to source salvage and reused components across Europe.
• Reuse Toolkit Open toolkit offering specification methods and templates for specifying reclaimed building components in construction projects. For architects, specifiers, and procurement teams.
• Reclamation Audit Guide Reference document providing a structured method for pre-demolition audits of existing buildings. Used to inventory and assess reusable components.
• Books and Publications Published books and publications on architecture, design, and material reuse, including titles such as Ad Hoc Baroque and works on dismantling and reuse. Sold via online shop and retail.
• Education and Training Services Workshops, lectures, and training programs delivered to universities, professional bodies, and project teams on circular construction and material reuse.

Quantifiable outcome

• Only 1% of building elements are currently reused following first application in NW Europe
• +4 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

16 partnerships are on record, tiered core and minor.

• Belgian Building Research Institute (BBRI)coreStrategic or Co-development PartnerResearch partner in the Interreg NWE FCRBE project, contributing expertise in building research and circular construction methodologies.
• BellastockcoreStrategic or Co-development PartnerKey partner in FCRBE project, jointly developing tools and methods for reuse. Also collaborated on Opalis expansion to France and Netherlands.
• Bruxelles-EnvironnementcoreStrategic or Co-development PartnerCo-funder and strategic partner supporting Rotor's work on circular economy in Brussels. Partner in FCRBE project.
• Centre Scientifique et Technique du Bâtiment (CSTB)coreStrategic or Co-development PartnerFrench scientific and technical center for building, partner in FCRBE project contributing research expertise.
• Construction ConfederationcoreStrategic or Co-development PartnerBelgian construction industry association, partner in FCRBE project helping bridge research with industry practice.
• SalvocoreStrategic or Co-development PartnerUK-based organization managing Europe's oldest post-war directory of reclamation dealers. Partner in FCRBE project.
• University of BrightoncoreStrategic or Co-development PartnerAcademic partner in FCRBE project contributing research expertise on reuse and circular construction from UK perspective.
• Ghent UniversitycoreStrategic or Co-development PartnerResearch partner in Ad Hoc Baroque project on Marcel Raymaekers' salvage architecture. Lionel Devlieger is associate professor at UGent.
• Flanders Architecture Institute (VAi)coreStrategic or Co-development PartnerCollaborated on Ad Hoc Baroque book launch and Unfolding the Archives exhibition on Marcel Raymaekers' work.
• RetrivalminorStrategic or Co-development PartnerSocial economy cooperative specializing in deconstruction and material reuse. Example of successful reuse operation documented by Rotor.
• Croisade PauvretéminorStrategic or Co-development PartnerNon-profit organization recovering construction materials for sale at accessible prices. Example of reuse sector diversity documented by Rotor.
• City of UtrechtminorStrategic or Co-development PartnerJoined FCRBE Capitalisation effort in 2022-2023, contributing to knowledge sharing on reuse practices.
• LIST (Luxembourg Institute of Science and Technology)minorStrategic or Co-development PartnerJoined FCRBE Capitalisation effort in 2022-2023, bringing research expertise from Luxembourg.
• TU DelftminorStrategic or Co-development PartnerJoined FCRBE Capitalisation effort in 2022-2023, contributing academic perspective from Netherlands.
• A.M. ORG Urbanism & ArchitectureminorImplementation/ SI/ Consulting PartnerLead of project team for Manuel Espaces Publics, working with Rotor on public space reuse guidelines.
• Bureau Bas SmetsminorImplementation/ SI/ Consulting PartnerPart of project team for Manuel Espaces Publics, collaborating with Rotor on Brussels public space reuse guidelines.

Scale indicators9 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Salvo: UK-based organization managing Europe's oldest post-war directory of reclamation dealers. Directly comparable to Opalis and a documented FCRBE project partner serving the same reuse-dealer-discovery use case.
• Madaster: Dutch platform providing material passports for buildings, enabling circularity. Directly comparable to Rotor's Opalis directory as a digital infrastructure layer for circular construction material flows in Europe.
• Metabolic: Dutch circular economy consultancy advising governments and businesses on circular systems. Directly comparable to Rotor in consulting model, mission focus, and target customers (public authorities and progressive enterprises).
• Retrival: Belgian social economy cooperative specializing in deconstruction and material reuse. Direct operational peer in the construction reuse sector; documented by Rotor as an example of successful reuse practice achieving 27% reuse by volume.
• Bellastock: French cooperative focused on circular construction, material reuse, and deconstruction. Direct peer and FCRBE partner; shares similar cooperative structure, academic integration, and reuse methodology development mission.

Emerging players

• Circle Economy: Dutch foundation operating the Circularity Gap Reporting framework and advising on circular economy transitions. Comparable to Rotor at the broader circular economy level, with policy and research orientation.

Broad incumbents

• 3XN Architects: Danish architecture firm with dedicated sustainability research arm (GXN). Comparable to Rotor as a design practice integrating research, sustainability, and circular principles into architectural delivery.
• Arup: Global engineering and design firm with substantial sustainability and circular economy practice. Relevant as a broader incumbent offering consulting services that overlap with Rotor's circular construction advisory work.
• Buildwise (formerly BBRI): Belgian Building Research Institute providing construction research and technical guidance. Comparable to Rotor as a research partner in FCRBE; broader in scope but shares the construction-research and methodology-development role.
• White Arkitekter: Swedish architecture firm with strong sustainability mandate and research-driven practice. Comparable to Rotor as a design practice integrating sustainability research into architectural projects across Europe.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/rotorvzw
• LinkedInlinkedin.com/company/rotor-vzw-asbl
• Instagraminstagram.com/rotor_brussels

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

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 Rotor vzw-asbl