Context
The Yvelines Departmental Council (CD78) aims to implement a strategy to meet the energy performance objectives it has committed to under the French Regulations (Tertiary Decree), while optimizing investments to reduce its maintenance backlog. Oxand supports the Council by highlighting priority operations and identifying the impact of works in terms of asset aging and safety, as well as improvements in energy performance. Without a maintenance strategy, the grey debt is expected to triple by 2050.
Our solution
Centralize knowledge of the asset portfolio and gain a clear, reliable view of performance status Prioritize the most critical operations based on their energy savings and evaluate return on investment Target key operations based on rehabilitation needs with a focus on sustainability Simplify decision-making to ensure informed investments
What Oxand delivered
Clear portfolio performance vision
Clear vision of portfolio performance (risks, aging, and energy efficiency)
Optimized investment targeting
Optimization of investments through the identification of operations offering the best cost-to-energy performance improvement-to-risk reduction ratio
Justified budget trajectory
Budget justification: by 2032, the annual budget would need to increase by 45% to implement the optimal scenario.
Questions about this reference
What did the Yvelines Departmental Council set out to do?
To meet the energy performance objectives it committed to under the French tertiary-sector decree while optimising its investment, so that improving energy performance and reducing the maintenance backlog are pursued by the same programme.
How are priority operations identified?
By reading each candidate operation for three things at once: the energy saving it delivers, its effect on asset ageing and safety, and its return on investment — which is what allows the operations with the best ratio to come first.
Why can energy performance and maintenance not be planned separately?
Because they compete for the same envelope and often for the same component. A roof renewed for its condition is also the roof that carries insulation, so planning the two together avoids paying twice or choosing blindly.
What did the council need before deciding anything?
Knowledge of its estate centralised into a clear and reliable view of performance status. Without that, an energy trajectory can be committed to but not steered.
What does the council gain?
A clear view of portfolio performance across risk, ageing and energy efficiency, investments targeted on the best ratio of cost to energy gain to risk reduction, and a budget trajectory it can justify.