€10m · Series A · Energy · Berlin, Germany
Photo: Deutsche Sanierungsberatung / Vireo Ventures
Berlin-based Deutsche Sanierungsberatung (dsb) has closed a €10m Series A led by Simon Capital and VERBUND X Ventures. Existing investors IBB Ventures, Vireo Ventures and Atlantic Food Labs also participated in the round, which will fund the company’s digital renovation platform, partner network and new home-energy products.
Turning a fragmented renovation into one workflow
Renovating a home for energy efficiency usually means coordinating an energy adviser, subsidy applications, several contractors and multiple technology choices. Dsb brings those steps into one process. Certified advisers collect building data on site and create a digital twin, which supports an individual renovation roadmap that sequences measures and helps unlock public funding. The platform then handles subsidy administration and lets homeowners compare quotations from vetted local contractors for measures including heat pumps, solar panels, windows and insulation.
That integration is the commercial mechanism behind the round. Homeowners get one point of contact for planning and delivery, while contractors receive pre-qualified projects instead of having to source and assess every lead themselves. Vireo Ventures says the company had served more than 10,000 private customers since its 2024 launch, built a network of 300 local contractors and expected more than €15m in 2026 revenue at the time of the announcement.
Expanding beyond a one-off renovation project
The financing will support further platform development, entry into the B2B market and expansion of the contractor network. Dsb also plans to launch its own electricity tariff. VERBUND X Ventures describes the planned NODUS offer as a subscription bundle combining a dynamic tariff, a home energy management system and a smart meter.
That product broadens the relationship beyond the renovation itself. A planning and contractor marketplace earns around a project; an energy-management subscription can remain useful after installation and connect assets such as heat pumps and solar systems to ongoing household consumption. The opportunity is to turn a complex, episodic purchase into a longer customer relationship. The execution test is whether dsb can preserve service quality as it adds B2B customers, more contractors and an operational energy product to the same platform.
