Deutsche Sanierungsberatung closes Series A round and secures more than €10 million

• The funding round for the Berlin-based climate-tech company is led by Simon Capital and VERBUND X Ventures
• The fresh capital will be used to launch the company's own electricity tariff, enter the B2B market and drive further growth
• Since its founding in 2024, dsb has already advised more than 10,000 homeowners and helped them implement energy-efficiency renovations

Berlin, 21 July 2026 — Berlin-based climate-tech startup Deutsche Sanierungsberatung (dsb) has closed a Series A financing round of more than €10 million. The round is led by Simon Capital and VERBUND X Ventures, with existing investors IBB Ventures, Vireo Ventures and Atlantic Food Labs participating again.

dsb supports homeowners throughout Germany with energy-efficient renovations—from independent energy advice and subsidy administration to implementation by vetted contractors. Investors were particularly impressed by the company's strong growth: since its founding in 2024, the startup has recently tripled in size, serving more than 10,000 private customers and expecting revenue of more than €15 million in 2026.

Buildings account for around 30 percent of Germany's CO₂ emissions

According to the German Environment Agency, the operation of buildings accounts for around 30 percent of Germany's CO₂ emissions, or approximately 112 million tonnes per year. Heating with fossil gas and oil is the main contributor. Residential buildings are therefore one of the biggest levers for the energy transition, yet the path to renovation remains arduous for many homeowners. This is exactly where dsb comes in: the startup combines independent energy advice and subsidy services with a network of vetted contractors on a digital platform. Homeowners need only one central point of contact for their entire renovation.

"Europe's competitiveness and climate targets will also be decided in people's homes: every geopolitical crisis causes energy costs to soar, and homeowners bear the consequences. The solution is an independent and sustainable energy supply. That is why we founded dsb," says Sebastian Schmidt, CEO and co-founder of dsb.

Co-lead investor Simon Capital also sees clear evidence that this approach works: "dsb solves a large and very tangible problem: millions of building owners do not know when or how they should renovate, while the skilled trades sector is chronically overstretched and inefficient in customer acquisition. With a standardised, technology-driven process, dsb creates genuine productivity gains for both sides at this interface—and makes an important contribution to the energy transition in the existing building stock," says Nico Heinz, Principal at Simon Capital.

From renovation roadmap to contractor appointment: everything from a single source

Certified energy consultants digitally capture all relevant building data on site. This is used to create a digital twin of the property, which forms the basis for the individual renovation roadmap (iSFP). The roadmap prioritises measures over several years and unlocks additional subsidies. dsb reviews all available KfW and BAFA funding programmes and manages the application process through to disbursement. This is particularly important because the conditions governing public subsidies change frequently. When it comes to implementation, dsb covers all key measures independently of manufacturers—from solar installations and heat pumps to window replacement and insulation. The process reduces the time homeowners spend on renovations by around 80 percent.

Growth despite a challenging market environment

dsb expects revenue of more than €15 million in the current year. Niclas Kern, CFO and co-founder of dsb, puts the round into the context of the current market environment: "Today, capital is flowing primarily into AI, while greentech receives less attention. Our round demonstrates that strong growth and a proven business model can still win over investors beyond the hype."

For co-lead investor VERBUND, the investment also has strategic relevance. Michael Strugl, CEO of VERBUND, adds: "The energy transition will be decided wherever energy is used efficiently—in households and buildings. With dsb, we are investing in a company that makes energy-efficient renovation transparent and scalable for customers."

With the fresh capital, dsb will further expand its platform and its network of 300 local contractors. The company also plans to launch its own electricity tariff and enter the B2B market.

Adam Khenissi, CCO and co-founder of dsb, describes the company's development as follows: "Two years ago, we were sitting in our living room researching insulation materials. Today, we support more than 10,000 families with their renovations. Around 80 percent of Germany's 15 million single-family homes have yet to undergo energy-efficiency renovations. We are only at the beginning of the journey."