Nienburg – Hans-Böckler-Straße
As part of a forward-thinking renovation project, three apartment buildings from 1950 in Nienburg/Weser are being fully modernized. Through a partnership between ecoworks and GBN Wohnungsunternehmen GmbH, all 54 residential units will be brought up to the latest energy standards using serial renovation and targeted renewable energy solutions. The project is designed to sharply reduce energy consumption and deliver sustainable, future-ready living spaces.
Overview
The Challenge:
Three apartment buildings in Nienburg/Weser, built in 1950 and originally rated energy efficiency class F, faced high energy losses, outdated construction, and an urgent need for modernization. The goal was to dramatically improve their energy performance through serial renovation, enhance living comfort, and ensure the buildings are future-ready.
The Approach:
The renovation focused on installing prefabricated façade elements, fully insulating the roof and basement ceiling, and overhauling building services with optimized ventilation systems. The buildings were also connected to the existing district heating network for efficient heat supply. These steps were essential to meet the Efficiency House Standard 55.
The Result:
Energy efficiency improved from class F to class A, with a significant reduction in both energy consumption and costs for residents. This project demonstrates how serial renovation can make existing residential buildings truly sustainable and future-proof, delivering substantial benefits for residents, owners, and the environment.
F ➔ A
Energy Efficiency Class
Upgrading to KfW Efficiency House 55 standard
139.6 t
CO₂ Emissions Savings
Emissions reduction and PV credit lower CO2-Balance from 139.7 t to 0.1 t CO2eq/a
- 71 %
Energy Demand
Improvement of energy demand from 158 kWh/m²a to 45.2 kWh/m²a
“We were convinced by ecoworks’ holistic approach and the opportunity to save energy and reduce CO₂ emissions. Besides the significant energy savings, the economic advantages make serial energy retrofitting with ecoworks the clear choice. Thanks to available subsidies, the renovation costs are comparable to those of conventional renovations—despite achieving a higher energy efficiency standard and much shorter construction times.”
Maßnahmen im Überblick
Fassaden
Dach
Fenster
Balkone
Keller
Heizung
Hauseingänge
Energieversorgung
Leitungen
Gallery
