Skip to main content
To KTH's start page To KTH's start page

PED StepWise — Participatory Step-by-Step Implementation Process for Zero Carbon District Concepts in Existing Neighbourhoods

Europe is built. We have around 2% new construction per year compared to existing buildings. Decarbonisation of existing buildings and neighbourhoods is challenging for several reasons: different stakeholders, proper timing, existing space on site, etc.
PED StepWise develops a step-by-step process that reflects the “messy” reality of the situation in existing neighbourhoods and the need to step “wisely” to develop a PED. By “wisely” we mean a process that is knowledge-based, participatory, holistic and inclusive, that does not just address technical issues but engages with citizens and other stakeholders to create zero-carbon places. From a smart grid to a wise grid.

The goals are to a) create and b) demonstrate a better & wiser process that lead to the implementation of innovative strategies for (local) generation of renewable energy, for energy flexibility, for energy efficiency and for sustainable low-carbon mobility in districts to achieve carbon-neutral PED.

The proposed process will be tested (in 3 districts), consisting of an implementation Process Map for reaching decarbonised, positive-energy, existing districts and neighbourhoods.


Most existing areas consist of buildings and energy infrastructure that are under different ownerships, this makes getting agreements for implementing energy efficiency and decarbonisation investments a challenge. Buildings in a neighbourhood (even those built in the same periods) can have different levels of energy efficiency due to previous improvements, and thus the need for and interest in upgrading, or e.g. connecting to new heat networks, can vary significantly from one property to the next. Even where cost-effective solutions with short payback periods can be identified getting buy-in from owners who may have different economic circumstances and willingness to invest can be challenging. In districts that are densely populated there may not be the roof space for each individual homeowner to install solar panels, and collective or third-party infrastructure investments may need to be organised. Where centralised decarbonisation solutions are required such as district heat networks it can be hard to gain buy-in from multiple property owners, who currently have a choice of energy supplier and may not wish to sign up to long term heat supply contract with a single supply. Widespread retrofit programmes that entail changes to the physical fabric and appearance of the built environment (e.g. external insulation, PV’s etc.) can meet resistance from residents, planning departments, heritage bodies, etc.

State of the art

We will build on the experience and methodologies developed in previous JPI Urban Europe funded PED research such as PED-ID and Trans-PED. Partners in this proposal led the JPI PED Pilot project PED-ID that developed innovative approaches to stakeholder engagement and early-stage assessments. The main difference from the PED process map that was developed on PED-ID is that in this project we aim to further develop the methodology specifically for existing urban structures to be able to address the “messy reality” that existing buildings and development are often at different stages of retrofitting and that different owners may have different situations and motivations.

Aim and objectives

We aim to create a better and more inclusive transformative process, suitable existing districts and neighbourhoods, which simultaneously addresses stakeholders’ needs and aspirations whilst enabling decarbonisation and PED standards.

Project partners

Funding is provided by DUT (Driving Urban Transitions).

Timeframe: 2024-2027


For further information about this project, please contact


Recycling of end-of-life wind blades through renewable energy driven molten salt pyrolysis process
I-UPS — Innovative High Temperature Heat Pump for Flexible Industrial Systems
FLUWS — Flexible Upcycled Waste Material based Sensible Thermal Energy Storage for CSP
STAMPE – Space Turbines Additive Manufacturing Performance Evaluation
Digital Twin for smart grid connected buildings
PED StepWise — Participatory Step-by-Step Implementation Process for Zero Carbon District Concepts in Existing Neighbourhoods
ADiSS — Aeroelastic Damping in Separated Flows
MERiT — Methane in Rocket nozzle cooling channels - conjugate heat Transfer measurements
CARE – Cavity Acoustics and Rossiter modEs
SCO2OP-TES – sCO2 Operating Pumped Thermal Energy Storage for grid/industry cooperation
POWDER2POWER (P2P) – MW-scale fluidized particle-driven CSP prototype demonstration
eLITHE – Electrification of ceramic industries high temperature heating equipment
DETECTIVE – Development of a Novel Tube-Bundle-Cavity Linear Receiver for CSP Applications
USES4HEAT – Underground Large Scale Seasonal Energy Storage for Decarbonized and Reliable Heat
ADA – Aggressive Duct Aerodynamics
VIFT — Virtual Integrated Fan and Turbine
HECTAPUS — Heating Cooling Transition and Acceleration with Phase Change Energy Utilization Storage
SUSHEAT — Smart Integration of Waste and Renewable Energy for Sustainable Heat Upgrade in the Industry
Analysis of PV system in Sweden
EVAccel — Accelerating the Integration of Electric Vehicles in a Smart and Robust Electricity Infrastructure
Towards Sustainable Energy Communities: A Case Study of Two Swedish Pilot Projects
HYBRIDplus – Advanced HYBRID solar plant with PCM storage solutions in sCO2 cycles
SHARP-SCO2 – Solar Hybrid Air-sCO2 Power Plants
RIHOND – Renewable Industrial Heat On Demand
A turnkey solution for Swedish buildings through integrated PV electricity and energy storage (PV-ESS)
A new standard methodology for assessing the environmental impact of stationary energy storage systems (LCA-SESS)
EleFanT – Electric Fan Thruster
Circular Techno-Economic Analysis of Energy Storage– IEA Annex Co-coordination
Optimization of Molten Salt Electric Heaters
FLEXnCONFU: Flexiblize Combined Cycle Power Plants through Power To-X Solutions using Non-Conventional Fuels
ARIAS - Advanced Research Into Aeromechanical Solutions
PILOTS4U – A network of bioeconomy open access pilot and multipurpose demo facilities
Cavity Purge Flows inside axial turbines
Effective thermal storage systems for competitive Stirling-CSP plants
ENFLOW: Energy flow metering of natural and biogas for residential applications
H2020 Pump Heat
BRISK II – Infrastructure for Sharing Knowledge II
Improved flue gas condensate treatment in MSW incineration via membrane distillation
Integrated modelling and optimization of coupled electricity and heating networks
Membrane distillation for advanced wastewater treatment in the semiconductor industry
Microgrid for Tezpur University
Smart and Robust Electricity Infrastructure for the Future