Deutsche Sanierungsberatung (dsb), a Berlin-based ClimateTech startup helping to make residential homes climate-neutral, has closed a Series A round of over €10 million to fund a proprietary electricity tariff, entry into the B2B market, and further growth. The round was led by Simon Capital and VERBUND X Ventures, with existing
Rahul Raj
Deutsche Sanierungsberatung (dsb), a Berlin-based ClimateTech startup helping to make residential homes climate-neutral, has closed a Series A round of over €10 million to fund a proprietary electricity tariff, entry into the B2B market, and further growth.
The round was led by Simon Capital and VERBUND X Ventures, with existing investors IBB Ventures, Vireo Ventures, and Atlantic Food Labs participating again. In February 2025, the company secured €3.6 million in a Seed funding round.
Nico Heinz, Principal at co-lead investor Simon Capital, said, “dsb solves a big, very concrete problem: millions of property owners don’t know when or how to renovate, while the trades sector is chronically overloaded and inefficient at customer acquisition. With a standardised, tech-driven process, dsb creates real productivity gains for both sides at this intersection and makes an important contribution to the energy transition in the existing building stock.”
Founded in 2024, dsb assists homeowners throughout Germany with energy renovations, offering services from independent energy consulting and subsidy processing to implementation by vetted skilled trades businesses.
Referencing Germany’s Federal Environment Agency, the company states that building operations are responsible for roughly 30% of the country’s CO2 emissions — about 112 million tons per year — driven mainly by heating with fossil gas and oil. It further notes that residential buildings are therefore one of the biggest levers for the energy transition, yet the renovation journey remains challenging for many homeowners.
dsb claims to address this by combining independent energy consulting and subsidy services with a network of vetted skilled trades businesses on a digital platform. Homeowners need just one point of contact for their entire renovation.
“Europe’s competitiveness and climate goals are also decided at home: every geopolitical crisis sends energy costs soaring, and homeowners bear the consequences. The solution is independent, sustainable energy supply. That’s why we founded dsb,” said Sebastian Schmidt, CEO and co-founder of dsb.
According to dsb, the certified energy consultants collect all relevant building data digitally on site. This creates a digital twin of the house, forming the basis for an individual renovation roadmap (iSFP), which prioritises measures over several years and secures additional subsidy bonuses.
dsb mentions that it reviews all funding options through KfW and BAFA and handles the application process through to disbursement. Regarding implementation, dsb claims to cover all major renovation measures in a way that is independent of the manufacturer, including solar panels, heat pumps, window replacements, and insulation. For homeowners, this process reduces the required time by approximately 80%.
Since its founding in 2024, the German startup reported that it has tripled in size, now serving over 10,000 private customers. For 2026, dsb forecasts revenue exceeding €15 million.
Niclas Kern, CFO and co-founder of dsb, stated, “Right now, capital is flowing mainly into AI, and GreenTech is getting less attention. Our round shows that strong growth and a working business model can still win over investors, even outside the hype.”
The company plans to use this capital to continue expanding its platform and its network of 300 local skilled trades businesses. Alongside the launch of a proprietary electricity tariff, the company also intends to enter the B2B market.
“Two years ago, we were still sitting in a living room researching insulation materials. Today, we’ve helped more than 10,000 families with their renovations. Around 80% of Germany’s 15 million single-family homes are still not energy-efficient. We’re only at the beginning of this journey,” concluded Adam Khenissi, CCO and co-founder of dsb.
