Understanding Medium Term Plans in PAS2035
The PAS2035 standard represents a fundamental shift in how retrofit projects are planned, assessed and delivered across the UK. At the heart of this methodology lies the Medium Term Plan (MTP)—a document that serves as the critical bridge between initial energy assessment and actual retrofit implementation. For housing associations, retrofit coordinators and installers, understanding what Medium Term Plans are and why they matter has become essential to compliance and project success.
A Medium Term Plan is a structured, evidence-based document that outlines the proposed retrofit measures for a building over a defined period, typically 3–10 years. It is produced following a detailed PAS2035 energy assessment and forms the foundation for all subsequent retrofit work. Unlike a simple specification or quotation, an MTP is a holistic strategy that considers the building's condition, occupant needs, available budget, and optimal sequencing of works.
The Purpose and Function of Medium Term Plans
Medium Term Plans serve several critical functions within the retrofit journey:
- Evidence-based decision making: They are grounded in comprehensive building assessments, not assumptions or guesswork
- Risk management: They identify potential issues before works begin and propose solutions accordingly
- Budget optimisation: They help prioritise measures to deliver maximum energy and carbon savings within financial constraints
- Regulatory compliance: They demonstrate adherence to PAS2035 and building regulations requirements
- Communication tool: They provide clarity for building owners, funders and delivery teams about what will happen and why
Sequencing and Interdependency
One of the most important functions of an MTP is establishing the correct order and interdependency of works. PAS2035 emphasises that measures must be sequenced logically—for example, improving ventilation before air-tightness measures, or addressing moisture before installing insulation. A well-developed MTP prevents costly mistakes and ensures measures work together effectively rather than undermining each other.
Key Components of an Effective Medium Term Plan
A comprehensive MTP should include:
- Summary of building condition and performance baseline
- Clear identification of retrofit measures, prioritised by phase
- Technical specifications and installation requirements
- Expected energy and carbon outcomes for each phase
- Cost estimates and funding implications
- Risk assessment and mitigation strategies
- Quality assurance and handover procedures
- Post-completion monitoring and verification approach
Phasing and Flexibility
Medium Term Plans are not fixed blueprints. They must balance long-term strategic vision with flexibility to respond to emerging conditions, budget changes or new information discovered during works. Each phase should be capable of standing alone whilst contributing to the overall retrofit strategy. This phased approach is particularly important for housing associations managing multiple properties with varying budgets and timescales.
Why Medium Term Plans Matter for Retrofit Success
Avoiding Retrofit Failure Modes
Poor retrofit outcomes often stem from inadequate planning rather than technical incompetence. Common failures include creating unintended consequences—such as moisture problems from poorly sequenced insulation work, or thermal bypass from incompletely designed air-tightness measures. A thorough MTP identifies and prevents these failure modes through careful design and specification.
Supporting Occupant Health and Comfort
PAS2035 places occupant needs at its core. Medium Term Plans that fail to consider how residents use buildings, their health vulnerabilities or their concerns are unlikely to deliver sustained improvements. Effective MTPs therefore incorporate occupant engagement and ensure measures address real comfort and safety needs.
Securing Funding and Stakeholder Confidence
Funders—whether government schemes, local authorities or private sources—increasingly expect evidence-based retrofit strategies. An MTP demonstrates professional approach, reduces perceived risk and strengthens the case for investment. It shows clear thinking about sequencing, outcomes and value for money.
The Broader Context
As the UK accelerates towards net-zero carbon targets, retrofit activity will intensify significantly. Medium Term Plans provide the professional framework needed to deliver quality retrofits at scale. They ensure that retrofit work remains focused on genuine performance improvement rather than simply installing measures without understanding their collective impact.
For retrofit coordinators and installers, familiarity with Medium Term Plans is no longer optional—it is fundamental to operating within contemporary industry standards and meeting client expectations for professionalism and accountability.