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„Worst Performing Buildings“ (WPB) are structures that rank among the least efficient in terms of energy use and ecological impact.

The "Brown to Green" approach is gaining traction in the real estate and housing sectors. This strategy focuses on transforming outdated, energy-inefficient buildings—referred to as “brown”—into sustainable, energy-efficient, and environmentally friendly properties—“green.”

Residential neighborhoods offer ideal conditions for serial energy-efficient renovation because their homogenous building structures, economies of scale, and standardized construction methods enable efficient and economical implementation:

Achieving climate goals in the housing sector depends on three pillars: energy-efficient renovations, cleaner heating technologies, and fully decarbonized energy sources.

When ecoworks first brought serial renovation to Germany in 2019, many were skeptical. The industry often called it "purely theoretical." Embracing the approach and actually implementing projects was a bold decision by a few.