Bau- und Liegenschaftsbetrieb Nordrhein-Westfalen (BLB NRW) has signed a long-term framework agreement with circular construction specialist Concular. The agreement runs until 2030 and aims to structurally establish the reuse of building materials within the day-to-day operations of the state-owned portfolio. With around 4,000 properties and approximately 10.4 million square metres of net internal floor area, the state-owned enterprise ranks among the largest institutional asset holders in Europe.
Following Concular's partnership agreed in early 2026 for the Berlin TXL site, this deal marks a strategic transition from isolated pilot projects to a scalable circular economy within the existing building stock. Concular is taking on consultancy, specialist technical planning, and operational supervision for upcoming refurbishment, conversion, and deconstruction works carried out by the state enterprise.
Digital component surveying and regional logistics hubs
The implementation of the circular economy is underpinned by standardised procedures and a coordinated logistics infrastructure across the state of Nordrhein-Westfalen. Before refurbishment or demolition work begins, properties are systematically analysed using pre-deconstruction audits in accordance with DIN SPEC 91484 in order to identify recyclable and retainable materials at an early stage.
- —Systematic audits in accordance with DIN SPEC 91484 to assess the potential for non-destructive dismantling
- —Establishment of a state-owned digital platform for internal redistribution and external marketing of building materials
- —Setting up of regional urban mining hubs in Nordrhein-Westfalen for intermediate storage, processing, and re-certification
- —Comprehensive tracking of raw material lifecycles and embodied carbon via life-cycle assessments and digital building resource passports
Defined contract models govern the practical execution. These provide for direct purchases of salvaged materials at residual value by Concular, along with regulated revenue-sharing mechanisms for resale to third parties. Where elements remain within the state-owned property portfolio for reuse, transport, deconstruction, and processing are coordinated via structured works contracts.
Experience from Düsseldorf as a basis for scaling up
The long-term contract deepens an existing partnership that was tested, among other schemes, during the refurbishment of the Behrensbau in Düsseldorf. The fixed term until 2030 provides the contractual partners with the planning certainty required to invest continuously in staff, technical planning, and on-site logistics infrastructure.
For the property industry, the state enterprise's approach offers pioneering insights. The project demonstrates, both for municipal bodies and for private portfolio owners, that the systematic reuse of construction products at portfolio scale is legally robust and economically viable.
