The challenge of the social housing sector
Frequency of renovation
≈0.01% have high
≈0.3% have minimal
1,5% Average renovation rate in the European social housing
80% of European renovations do not target energy performance
Current energy efficiency renovations in social housing:
• are for specific buildings;
• follow a lifetime component replacement procedure without
considering the benefits of integrated renovation at scale;
• follow a single technology approach to optimise their investments
without strategically planning their renovation.
A lack of both viable strategies for large-scale building renovation and
decision-making tools with an integrated perspective of cost-benefit
evaluation encompassing complete renovation measures.
The DREEAM project
DREEAM: Demonstrating an integrated Renovation approach for Energy Efficiency
At the Multi-building scale
DREEAM aims to show that renovating at a larger scale opens the opportunity for a better
integration of renewable energy and is generally more cost effective. The project demonstrates a
multi-building and single owner renovation approach that can achieve a 75% reduction of total
DREEAM focuses on social and public housing (representing 12% of the EU building stock), whose
owners manage large portfolios of residential buildings with high potential for energy performance
improvements. In such environment, the economies of scale can be best validated. On the one side,
many activities and technologies become cheaper per unit. On the other side, smart energy
management systems work best in connected systems.
This project has received funding from the European Union’s Horizon 2020 research and innovation
programme under the Grant Agreement no 680511. This document does not represent the opinion of the
European Union, and the European Union is not responsible for any use that might be made of its content.
Replicable large-scale approach for residential NZEB renovation
op: misa: on'
Using advanced analytical tools, DREEAM supports
decision-making before, during, and after renovation,
considering technical, financial and social factors.
• Better integration of renewable energy
• Enhance energy efficiency gains through renovation
• Maximise energy efficiency renovation & renovation rate
Integrated approach at scale
The gaps in building owners’ decision-making process:
• Strategy definition: development of investment strategies
at portfolio level should start from long-term ambitions
• Exploration of renovation solutions: solutions should be
selected based on an optimal combination of measures
realising the benefits of scale
Portfolio investment planning
Energy efficiency targets are the starting point for developing
effective investment strategies.
Backcasting approach is based on data driven analysis to move
from single-building perspective into scaled processes.
Projection of the BAU practices links long-term ambitions with
real investment options, estimating the gap that stands
Typical (energy) renovation
approach starts here
Upscaling investments in energy efficiency renovation
Renovation options Investment pathwaysBuilding stock assessment
Summary of relevant energy
Overview of 2-3 suitable retrofit
options per dwelling archetype
Various levels of renovation
depending on energy savings
target, investment requirement,
operational concerns, etc.
Target-driven design of pathways
Taking a long term view (2040, 2050)
and ideal outcomes as starting point
Compare investment strategies
Assess the impact (investment, Co2,
energy savings, etc.) of alternative
General overview of stock
Analysing the portfolio’s current
characteristics at dwelling level
Categorising buildings by
archetype and construction year
Visualising results for easier
Overview of the stock by theme
Energy, financial, operational
01 02Building Stock Assessment
• Energy efficiency target: EPC label C by 2030
• Current status: 78% of the stock has energy label D
• Buildings are geographically clustered by type and age
Two different renovation packages per target group:
• Shallow renovation: achieving minimum policy target
• Deep renovation: achieving more ambitious performance
Case study: UK housing association
Gap to Policy Targets & Investment Scenarios
• Current renovation strategy is based on “shallow
renovations” prioritising older buildings.
• BAU investment: £5M/year
Insights & Conclusions
• Projecting BAU approach, only 56% of the portfolio would
reach EPC label C.
• Alternative investment strategies need to be considered
An integrated renovation approach would reduce the number
of interventions, lowering investment costs per unit and
decreasing energy bills.
The component-based replacement programmes offer
opportunities for quick gains in reducing energy bills for tenants.
Process: connected city housing ownership registry with
building technical databases and national database on
energy labels, covering 300 000 dwellings.
Insights: linking building quality and characteristics with
ownership structures led to a technical assistance
programme tailored to each specific ownership type.
Outcomes: Rotterdam has used the analysis to
• develop a tailored renovation approach for each
• change its organisational structure;
• collaborate with the EIB to support home owners
implement €100M investments in energy efficiency with
an ELENA grant of €3M.
Case study: Gemeente Rotterdam
Long-term impact: unlocking energy efficiency investments
Key Insight Main Use
The BO follows the city of Berlin’s ambition to
become energy neutral by 2050.
They do not have any understanding on NZEB
packages and their long-term investment costs.
With the ambition to meet the policy objectives, the BO
will use the results of the analysis to discuss new
financial models with the city of Berlin to allow large
Public housing association with a large portfolio
of buildings but with strong financial constraints.
Average rent is €100/m politically established.
They currently do not follow a strategic approach
The BO will use the results of this analysis:
• Explore potential long-term investments strategies
to recover investments
• Discuss with the regional government about the
need to set up sustainable financial instruments for
scaling up EE renovations
The BO has the policy push to have average
portfolio EPC label C by 2030. They lack a long-
term renovation plan and currently operate at
unit level, based on a component replacement
approach following a need-based evaluation.
The BO will use the results of the analysis to:
• Identify groups of buildings with similar
characteristics where multi-building renovation
could be performed, thus lowering costs
• Explore financing options to unlock investments in EE
The value of scaled investment planning
Housing associations could benefit
from long-term planning vs current
short-term financing based on
• Access to low-cost financing
instruments for large investments;
• Green value of the investments can
affect the cost of capital and
• Estimate ROI & assess revenue
Low Cost Financing Economy of Scale
An integrated approach to improve
overall system efficiency and ROI vs
single technology perspective.
Better Technology Integration
Social and public housing
Interested in Sustainable Renovation?
Buildingstock investment strategy
A study outlining alternative renovation plans,
which analyses the building stock and designs
renovation options and investment planning.
Who? Housing providers
What? Multi-building renovation analysis or portfolio investment plan
Cost? Free (as part of the DREEAM replication programme)
Multi-buildingenergy renovation study
A design study to identify the optimal
combination of technologies that can deliver the
highest energy reduction for a set of buildings
We would like to thank the DREEAM project consortium:
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Grant
Agreement no 680511. This document does not represent the opinion of the European Union, and the European Union is not
responsible for any use that might be made of its content.
If you would like to have more information
about this presentation, please contact
Email Giula Rinaldi:
Parece que tiene un bloqueador de anuncios ejecutándose. Poniendo SlideShare en la lista blanca de su bloqueador de anuncios, está apoyando a nuestra comunidad de creadores de contenidos.
¿Odia los anuncios?
Hemos actualizado nuestra política de privacidad.
Hemos actualizado su política de privacidad para cumplir con las cambiantes normativas de privacidad internacionales y para ofrecerle información sobre las limitadas formas en las que utilizamos sus datos.
Puede leer los detalles a continuación. Al aceptar, usted acepta la política de privacidad actualizada.