Berlin – Veilchen- and Hyazinthenstraße
Two residential buildings at Veilchenstraße 4/5 and Hyazinthenstraße 2 in Berlin have undergone extensive modernization as part of an ambitious renovation project. By combining serial renovation methods with advanced technologies, the project is sharply reducing energy consumption and delivering sustainable, high-quality living spaces.
Overview
The Challenge:
Built in 1954, these residential buildings faced major energy losses, outdated systems, and increasing operating costs—issues common in many neighborhoods. The goal was to dramatically improve energy performance through serial renovation, while also ensuring long-term comfort and appeal for residents.
The Approach:
The project used serial renovation with prefabricated façade elements, extensive photovoltaic panel installation, and comprehensive insulation upgrades. The building envelope was brought up to a high energy standard: all windows and doors were replaced, and both the roof and basement ceiling received advanced insulation. The buildings remain connected to district heating, while a 47 kWp photovoltaic system now generates about 42 MWh of clean electricity annually. Additional features include decentralized ventilation systems with heat recovery and spacious new balconies to enhance living quality.
The Outcome:
The result is near climate-neutral building operation, significantly reduced energy costs, and a modern, comfortable living environment that benefits residents, property owners, and the environment.
F ➔ A
Energy Efficiency Class
Upgrading to KfW Efficiency House 55 standard
39.2 t
CO₂ Emissions Savings
Emissions reduction and PV credit lower CO2-Balance from 44.8 t to 5.5 t CO2eq/a
- 73 %
Energy Demand
Improvement of energy demand from 170.7 kWh/m²a to 46 kWh/m²a
Maßnahmen im Überblick
Fassaden
Dach
Fenster
Balkone
Keller
Heizung
Hauseingänge
Energieversorgung
Leitungen
Gallery
