Low carbon redevelopment and extension of existing buildings
"Optoppen," a Dutch term translating as "topping up," refers to a construction method aimed at maximising the usable space in our cities through the addition of lightweight, low-carbon roof extensions.
Densifying urban neighborhoods through increased floor area provides a low embodied carbon solution that delivers new homes while funding retrofit and renovation efforts by reusing existing structures.
A web based tool to assess the number of storeys and increased floor area that can be added onto your building.
Check OutTen sustainable homes added atop Arent Janszoon Ernststraat, boosting housing, reducing costs, and enhancing sustainability in Amsterdam.
Learn more ->London Road, Kingston, gains 23 homes, including a CLT optopping with eight duplexes, showcasing sustainable and creative urban design.
Learn more ->Timber-frame optopping adds two storeys to a 1960s arts centre, achieving 70% less embodied carbon compared with steel frame.
Learn more ->Current and upcoming policies for countries that have specific policies relating to Optoppen or encourage the use of timber for upward extensions
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