a.s.r. real estate and the Climate Cleanup Foundation announced their partnership for certifying CO₂ storage at the PROVADA real estate fair. The CubeHouse is the first building from the ASR Dutch Mobility Office Fund to receive carbon credits through the Open Natural Carbon Removal Accounting (Oncra) initiative. The partnership was signed today in the presence of Jan-Willem Kos, Office Asset Manager at a.s.r. real estate, and Sven Jense, Director of the Climate Cleanup Foundation.
The hybrid timber office building The CubeHouse is under construction in the heart of Amsterdam’s Zuidas business district. By using timber in its construction, The CubeHouse addresses the urgent need to reduce CO₂ emissions in the building sector.
Partnership for transparent CO₂ storage
Open Natural Carbon Removal Accounting (Oncra) will certify the CO₂ storage in The CubeHouse’s wooden structure. Approximately 75% of the load-bearing structure is made of Cross-Laminated Timber (CLT), resulting in a net storage of 2,662 tons of CO₂. This represents a significant step toward future-proof, low-carbon construction. Certification by Oncra ensures transparent, verifiable, and scientifically grounded reporting of CO₂ storage, contributing to a.s.r. real estate’s mission to develop sustainable real estate.
“With our Paris Proof roadmap, we are already working to reduce CO₂ emissions during operations. Reducing emissions during construction is the next step. Our partnership with Oncra allows us to transparently account for and report the CO₂ storage of buildings like The CubeHouse,” said Pieter Vandeginste, Fund Director of the ASR Dutch Mobility Office Fund.
Sven Jense of the Climate Cleanup Foundation added: “The CubeHouse shows how buildings can transform from CO₂ sources into carbon storage sites. We are proud to certify this example project.”
Leader in sustainable office innovation
The CubeHouse spans 16,600 m² and incorporates sustainable energy and water systems. Solar panels on the roof and facade generate over 138,000 kWh annually, covering 80% of the building’s energy needs. Heating and cooling are provided by an underground thermal energy storage (TES) system, and rainwater is collected for toilet flushing and irrigation.
The building was designed by the renowned New York architecture firm SO–IL with a strong focus on well-being, and it holds BREEAM Excellent and WELL Gold certifications. Green indoor areas, called “breathe spaces,” offer spots for meetings, work, and relaxation. There is a spacious, covered bicycle parking area, and the premises are designed to be car-free.
The CubeHouse will become the new headquarters for BNP Paribas and Arcadis. The project is being developed by G&S&, constructed by Visser & Smit Bouw, and has been purchased by a.s.r. real estate for the ASR Dutch Mobility Office Fund.
About Oncra
Oncra (Open Natural Carbon Removal Accounting) is an initiative of the Climate Cleanup Foundation. It offers open, science-based methods to measure and certify biobased and circular CO₂ storage. Oncra supports climate solutions aligned with the Paris Climate Agreement.
This article was written by, and published on the website of,a.s.r. real estate, and translated by us.