Case study: Construction circularity — a startup-to-enterprise scale story

Madaster, the Dutch materials passport platform founded in 2017, grew from a three-person startup operating out of a co-working space in Amsterdam to a company processing building data across seven European countries and more than 500 million square meters of floor area by 2025. The company's journey illustrates both the massive opportunity and the operational complexity involved in scaling construction circularity from a niche concept to an enterprise-grade proposition. According to the European Commission's 2025 Circular Economy Action Plan monitoring report, the construction and demolition sector generates approximately 374 million tonnes of waste annually in the EU alone, representing roughly 37% of total waste generation and the single largest waste stream by volume. Converting even a fraction of that flow into reusable materials represents a multi-billion euro market opportunity.

Why It Matters

The construction industry consumes approximately 50% of all extracted raw materials globally and generates 39% of energy-related carbon emissions when both embodied and operational carbon are included. The Ellen MacArthur Foundation estimates that applying circular economy principles to the built environment could reduce construction material costs by 25 to 35% while cutting embodied carbon by 40 to 60% by 2035. For investors evaluating climate technology portfolios, construction circularity sits at the intersection of regulatory tailwinds (the EU's revised Waste Framework Directive, the forthcoming ESPR regulations for construction products), massive material flows, and digital enablement through BIM, IoT, and AI-powered sorting technologies.

The startup-to-enterprise scaling challenge in construction circularity is distinctive because the industry is fragmented (over 3.3 million construction enterprises in the EU, 95% of which are SMEs), project-based rather than product-based, and governed by local building codes and waste management regulations that vary by municipality. Successfully scaling a circularity solution requires navigating this complexity while maintaining unit economics that justify venture-scale investment.

Key Concepts

Materials passports are digital records that document the identity, location, quantity, and quality of materials within a building or infrastructure asset. They enable end-of-life material recovery by providing the information needed to assess reuse potential, residual value, and hazardous substance content. The concept originated in the 2013 Turntoo model developed by Thomas Rau and was formalized through the BAMB (Buildings as Material Banks) EU Horizon 2020 project.

Urban mining refers to the extraction of valuable materials from existing buildings and infrastructure rather than from virgin resource deposits. A typical commercial building contains 50 to 200 kg of copper, 1,000 to 3,000 kg of aluminum, and 20,000 to 80,000 kg of steel per 1,000 square meters. At 2025 commodity prices, the recoverable material value in a 10,000 square meter office building ranges from EUR 150,000 to EUR 500,000.

Design for disassembly (DfD) encompasses construction methods that facilitate future material recovery, including reversible connections (bolted rather than welded steel, mechanical fixings rather than adhesives), modular structural systems, and standardized component dimensions. Buildings designed for disassembly can achieve material recovery rates of 85 to 95%, compared to 30 to 50% for conventionally designed structures.

Residual value modeling calculates the future economic value of materials embedded in buildings, accounting for degradation rates, commodity price projections, and recovery costs. This concept enables materials to be treated as financial assets on balance sheets rather than sunk costs, fundamentally changing the economic calculus of construction investment.

What's Working

Madaster's growth trajectory demonstrates several scaling strategies that have proven effective in construction circularity. The company initially focused on the Netherlands, where regulatory conditions were uniquely favorable: the Dutch government's 2016 "Netherlands Circular in 2050" roadmap set explicit targets for construction material circularity, and the Ministry of the Interior required materials passports for all new government buildings starting in 2020. This regulatory anchor provided Madaster with a guaranteed initial customer base and credibility for private sector outreach.

The platform's subscription model, charging building owners EUR 0.10 to EUR 0.50 per square meter per year for materials passport hosting and analytics, proved scalable because marginal costs per additional building dropped sharply after the initial BIM integration infrastructure was built. By 2023, Madaster was processing new building registrations at a rate of 2,000 per month across the Benelux region, with gross margins exceeding 70%.

Rotor Deconstruction, a Brussels-based social enterprise founded in 2011, demonstrates a different but complementary scaling path. Rotor operates a physical marketplace for reclaimed building components, specializing in high-value items such as structural steel sections, hardwood flooring, sanitary fixtures, and facade panels. The company processes approximately 3,000 tonnes of materials annually from demolition sites across Belgium and northern France, achieving resale rates of 65 to 75% by weight for materials entering their facility. Revenue per tonne of processed material averaged EUR 180 to EUR 280 in 2024, compared to disposal costs of EUR 40 to EUR 120 per tonne that building owners would otherwise pay, creating a clear economic value proposition for material donors.

StoneCycling, founded in Amsterdam in 2013, scaled its recycled brick manufacturing operation from a pilot line producing 50,000 bricks per month to a full-scale factory capable of 1.5 million bricks per month by 2024. The company sources construction and demolition waste, glass, and ceramic materials that would otherwise go to landfill, and processes them into premium facade bricks sold at EUR 1.20 to EUR 2.50 per unit. Key projects include Google's Bay View campus in Mountain View, California, and the headquarters of Triodos Bank in the Netherlands. StoneCycling's success in commanding premium pricing for recycled products (conventional bricks sell at EUR 0.40 to EUR 0.80 per unit) demonstrates that circularity can function as a value-add rather than a cost center when product quality and aesthetics meet or exceed virgin alternatives.

What's Not Working

Material quality certification remains a persistent bottleneck. Reclaimed structural steel, for example, requires testing to confirm that it meets current design code requirements (Eurocode 3 for the EU, AISC 360 for the US). Testing costs of EUR 500 to EUR 2,000 per batch, combined with uncertainty about the original steel grade and service history, increase transaction costs and create liability concerns for structural engineers specifying reclaimed materials. The lack of standardized protocols for certifying reclaimed materials across EU member states forces companies like Rotor to navigate different testing and acceptance regimes in each market they enter.

Logistics costs undermine unit economics for lower-value materials. Reclaimed concrete aggregate, for example, has a material value of EUR 5 to EUR 15 per tonne but transport costs of EUR 8 to EUR 20 per tonne for distances exceeding 50 kilometers. This means that circular concrete economics only work within a tight geographic radius, limiting scalability for companies attempting national or pan-European operations. Several startups that attempted centralized reclaimed material processing facilities, including the Dutch startup New Horizon (which ceased operations in 2023), failed because transport costs consumed the margin advantage over virgin materials.

Timing mismatches between demolition supply and construction demand create inventory management challenges. Materials become available when buildings are demolished, but demand occurs when new construction projects specify reclaimed materials, and these timelines rarely align. Storage costs of EUR 3 to EUR 8 per square meter per month for covered warehousing mean that materials held for more than 6 to 12 months can become uneconomical even if eventual demand exists. Rotor addresses this through a digital marketplace that matches supply to demand in near-real-time, but achieving liquidity in such a marketplace requires reaching a critical mass of both demolition projects and construction projects in the same geographic area.

Insurance and liability frameworks have not adapted to circular construction. Building insurers typically price risk based on the use of certified new materials with manufacturer warranties. Reclaimed materials lack these warranties, and insurers either refuse coverage, apply premium surcharges of 15 to 30%, or require project-specific engineering assessments that add EUR 10,000 to EUR 50,000 per project. Until insurance products specifically designed for circular construction reach the market, this friction will continue to slow adoption.

Key Players

Established Companies

Bouygues Construction (France): integrated circular economy principles into its "Building for Life" strategy, targeting 30% recycled content in new projects by 2030 and operating 14 material reuse platforms across France.

Royal BAM Group (Netherlands): partnered with Madaster to implement materials passports across its EUR 7 billion annual project portfolio and operates BAM Circular, a dedicated unit managing material take-back and resale.

Skanska (Sweden): operates "Skanska Circular Hub" providing material reuse services across its Nordic and UK operations, diverting over 120,000 tonnes of materials from landfill in 2024.

Drees & Sommer (Germany): consulting firm that has led over 200 Cradle to Cradle building certification projects and developed the "Urban Mining Index" methodology adopted by multiple German municipalities.

Startups

Madaster (Netherlands): materials passport platform covering seven countries and over 500 million square meters, with EUR 22 million in total funding through Series B.

StoneCycling (Netherlands): recycled brick manufacturer supplying premium facade products to major commercial and institutional projects globally.

Rotor Deconstruction (Belgium): reclaimed building component marketplace processing 3,000 tonnes annually with 65 to 75% resale rates.

Concular (Germany): digital platform connecting demolition projects with construction projects for direct material reuse, raised EUR 8 million in Series A funding in 2024.

Faciliteco (France): startup specializing in pre-demolition audits using AI-powered image recognition to identify reusable components, deployed across 150 projects since 2022.

Investors

Shift Invest (Netherlands): impact fund with construction circularity as a core thesis, investor in Madaster and multiple circular construction startups.

SET Ventures (Netherlands): climate tech fund that has invested in digital infrastructure for circular construction.

EIT Climate-KIC (EU): accelerator and grant funder that has supported over 40 construction circularity startups through its Built Environment innovation program.

Circularity Capital (UK): growth equity fund focused on circular economy companies, with construction as a key vertical.

Action Checklist

• Conduct a pre-demolition audit on any building slated for removal to quantify reusable material value before default demolition contracts are awarded
• Register new construction projects on a materials passport platform to capture as-built material data while information is available and affordable to document
• Specify reclaimed or recycled materials for at least 15 to 20% of non-structural building components as a low-risk entry point for circular procurement
• Establish relationships with at least two regional reclaimed material suppliers to ensure supply availability and competitive pricing
• Include design for disassembly principles in structural connection details for new projects, focusing on bolted connections and mechanical fixings
• Request that structural engineers evaluate reclaimed steel options before defaulting to virgin material specifications
• Integrate residual material value into whole-life cost assessments for investment appraisals and asset valuations
• Monitor regulatory developments including the EU ESPR construction product requirements and national EPR schemes for construction materials

FAQ

Q: What is the typical return on investment for implementing materials passports on a commercial building portfolio? A: The direct cost of materials passport creation and maintenance is EUR 0.10 to EUR 0.50 per square meter per year, meaning a 50,000 square meter office portfolio costs EUR 5,000 to EUR 25,000 annually. The returns come from three sources: reduced demolition costs at end of life (20 to 40% savings by enabling selective deconstruction rather than conventional demolition), material resale revenue (EUR 50 to EUR 200 per square meter for commercial buildings depending on material composition and condition), and improved ESG ratings and GRESB scores that influence cost of capital. Royal BAM Group reported that buildings with materials passports achieved 5 to 8% higher asset valuations in 2024 sustainability-linked refinancing rounds.

Q: How do reclaimed materials compare to virgin materials on cost for typical construction applications? A: Cost competitiveness varies significantly by material type. Reclaimed structural steel is typically 10 to 25% cheaper than new steel when testing and certification costs are included, because scrap steel prices are 30 to 50% below new steel but testing adds EUR 500 to EUR 2,000 per batch. Reclaimed timber and hardwood flooring command premium prices (20 to 50% above new equivalents) due to aesthetic appeal and scarcity of old-growth species. Reclaimed concrete aggregate is cost-competitive with virgin aggregate only within a 30 to 50 kilometer radius of the demolition site due to transport costs. Recycled facade bricks from companies like StoneCycling sell at 50 to 200% premiums but compete in the premium architectural segment rather than on cost.

Q: What regulatory changes are most likely to accelerate construction circularity adoption in Europe? A: Three regulatory developments are expected to have the largest impact. First, the revised EU Waste Framework Directive (expected adoption in 2026) will likely mandate pre-demolition audits and set minimum recycled content requirements for construction products. Second, the Ecodesign for Sustainable Products Regulation (ESPR) will extend digital product passport requirements to construction materials, creating a regulatory mandate for the type of data infrastructure that Madaster provides voluntarily today. Third, national Extended Producer Responsibility schemes for construction materials, already piloted in France and under development in Germany and the Netherlands, will shift disposal costs onto manufacturers and create financial incentives for designing recyclable products.

Q: What are the biggest risks for investors evaluating construction circularity startups? A: The primary risks are market timing, regulatory dependency, and unit economics at scale. Market timing risk arises because construction industry adoption of circular practices remains early-stage: fewer than 5% of European construction projects currently specify reclaimed materials or require materials passports. Regulatory dependency is significant because many business models (particularly materials passports and pre-demolition audits) depend on mandates that are proposed but not yet enacted. Unit economics risk manifests when startups that demonstrate viable pilot projects struggle to maintain margins at scale due to logistics costs, quality assurance overhead, and the difficulty of building two-sided marketplace liquidity in fragmented local markets. Investors should look for startups with revenue from voluntary adoption rather than purely regulatory-driven demand, defensible technology moats, and geographic density strategies that address logistics economics.

Sources

• European Commission. (2025). Circular Economy Action Plan: Implementation Report and Construction Sector Assessment. Brussels: European Commission.
• Ellen MacArthur Foundation. (2025). Completing the Picture: How the Circular Economy Tackles Climate Change in the Built Environment. Cowes: EMF.
• Madaster. (2025). Annual Impact Report 2024: Materials Passports at Scale. Amsterdam: Madaster Services BV.
• Royal BAM Group. (2024). Sustainability Report 2024: Circular Construction Performance. Bunnik: Royal BAM Group NV.
• Rotor Deconstruction. (2024). Annual Report: Material Flows, Recovery Rates, and Market Development. Brussels: Rotor VZW.
• StoneCycling. (2025). From Waste to WasteBasedBricks: Manufacturing Performance and Project Portfolio Review. Amsterdam: StoneCycling BV.
• European Environment Agency. (2025). Construction and Demolition Waste in Europe: Generation, Treatment, and Circularity Indicators. Copenhagen: EEA.
• Concular. (2024). Series A Announcement and Market Analysis: Digital Infrastructure for Circular Construction. Berlin: Concular GmbH.