The PAS2035 standard has fundamentally reshaped how we approach building retrofit in the UK. One of its most important concepts is the Medium Term Plan (MTP)—a strategic document that outlines how a building's energy performance will improve over time. For retrofit coordinators, installers, and housing associations, understanding what an MTP is and why it matters has become essential to delivering compliant, effective retrofit programmes.
What is a Medium Term Plan?
A Medium Term Plan is a detailed roadmap for improving a building's energy performance and operational resilience over a period typically spanning 5 to 15 years. It sits between immediate retrofit interventions and the building's longer-term energy strategy, providing a structured pathway for phased improvements.
Unlike a single retrofit project that addresses immediate issues, an MTP considers the building as a whole system. It identifies which improvements should be prioritised, in what sequence they should be implemented, and how they will interact with existing systems and future upgrades.
The plan typically includes:
- Current energy performance assessment and baseline data
- Identification of priority retrofit measures
- Sequencing and phasing of interventions
- Cost estimations and funding pathways
- Timeline for implementation
- Monitoring and review mechanisms
- Risk assessments and mitigation strategies
Why Medium Term Plans Matter
Compliance with PAS2035
PAS2035 explicitly requires a holistic approach to retrofit that avoids unintended consequences. An MTP demonstrates this systematic thinking. Without one, retrofit coordinators risk being seen as non-compliant, regardless of the quality of individual works completed.
Avoiding Retrofit Failure
Poor sequencing of retrofit measures can lead to costly failures. For example, installing new windows before addressing air tightness issues, or upgrading heating systems before insulation improvements, can result in wasted investment and suboptimal performance. An MTP prevents these mistakes by mapping out the logical order of works.
Financial Planning and Sustainability
Housing associations and building owners often face constrained budgets. An MTP allows them to spread costs intelligently, prioritising high-impact, cost-effective measures first. This approach improves project viability and increases the likelihood of securing funding from lenders and grant programmes.
Future-Proofing Buildings
A well-developed MTP considers not just current needs but future requirements—such as decarbonisation targets, changing climate conditions, and evolving technology. This forward-thinking approach ensures buildings remain fit for purpose and compliant with tightening regulations.
Risk Management
MTPs identify potential risks early: structural issues discovered during initial surveys, supply chain dependencies, or technical challenges with specific building types. Early identification allows teams to plan mitigation strategies rather than discovering problems mid-project.
Key Components of an Effective MTP
Baseline Assessment
A thorough understanding of the building's current condition is non-negotiable. This includes energy audits, structural surveys, building services assessments, and occupant feedback. Data quality here determines the quality of the entire plan.
Prioritisation Framework
Not all measures are equally urgent or impactful. An effective MTP uses clear criteria to prioritise interventions—considering factors such as energy savings potential, cost-effectiveness, health and safety implications, and resilience benefits.
Interdependency Mapping
Retrofit measures rarely exist in isolation. Improved insulation may require heating system upgrades. New ventilation may necessitate air tightness work. An MTP explicitly maps these dependencies to ensure coordinated implementation.
Flexibility and Review Points
Building retrofit is not static. Costs change, technology evolves, and occupant circumstances shift. A robust MTP includes scheduled review points—typically annually or biannually—to assess progress and adjust timings or scope as needed.
Practical Implementation
For retrofit coordinators developing MTPs in practice, several principles prove essential:
- Engage stakeholders early—residents, building managers, and funders all bring valuable perspective
- Use standardised data collection to ensure consistency and comparability
- Document assumptions clearly, as these may need revisiting later
- Build in contingency—retrofit often reveals unexpected issues
- Plan for monitoring and data capture from day one to validate improvements
Conclusion
Medium Term Plans represent more than a compliance checkbox. They embody a strategic, systems-based approach to retrofit that protects buildings, residents, and investments. For retrofit coordinators, installers, and housing associations serious about delivery excellence and PAS2035 compliance, developing and maintaining quality MTPs is now integral to professional practice.