Target Energy Pathways: A Practical Guide for Welsh Social Landlords
By Tricity Labs, Technical Team — Independent retrofit measurement & verification, working to BS 40101 principles
Target Energy Pathways (TEPs) are the property-by-property plans Welsh social landlords must produce under the Welsh Housing Quality Standard 2023, showing how each home will reach its target energy performance using real, measured evidence rather than modelled assumptions. Every registered social landlord and local authority needs 75% of full TEPs in place by 1 September 2026, and 100% by 31 March 2027. Getting them right depends on measured baseline data, a credible Data Quality Improvement Plan, and evidence that stands up to independent scrutiny.
Photo by ptrabattoni via Pixabay (source)
Three things to know:
- TEPs are mandatory under WHQS 2023, with phased deadlines of 75% by 1 September 2026 and 100% by 31 March 2027.
- TEPs are supposed to reflect how a home actually performs, not what a model predicts — measured indoor conditions, energy use, and damp risk matter more than SAP assumptions.
- Environmental monitoring is itself a mandatory, funded requirement under the Optimised Retrofit Programme (ORP), so the evidence needed for TEPs and the funding for gathering it can come from the same source.
Key Takeaways
| Point | Detail |
|---|---|
| TEPs are a compliance deadline, not a nice-to-have | WHQS 2023 requires a Target Energy Pathway for every home in a landlord's stock, phased at 75% by 1 September 2026 and 100% by 31 March 2027. |
| A Whole Stock Assessment underpins the pathways | Landlords must assess the condition of their full stock and produce a Data Quality Improvement Plan showing how evidence gaps will be closed. |
| Measured data outperforms modelled estimates | Continuous sensor data on temperature, humidity, and occupancy gives a truer picture of performance than SAP-based projections alone. |
| ORP funding overlaps directly with TEP evidence needs | £98.75 million confirmed for 2026/27, with environmental monitoring listed as a mandatory eligible measure — not an added cost. |
| Independent verification builds trust in the pathway | BS 40101 independent Building Performance Evaluation gives Welsh Government, boards, and tenants confidence that the numbers are real. |
| TEPs need to be treated as living documents | Pathways should update as retrofit measures are installed and as measured performance data accumulates over time. |
Table of Contents
- What Are Target Energy Pathways?
- Why Target Energy Pathways Depend on Measured Baseline Data
- The Data Quality Improvement Plan: Closing the Evidence Gap
- A Practical Target Energy Pathways Checklist
- How to Evaluate Target Energy Pathways: Best Practices
- Target Energy Pathways for Housing Associations, Contractors, and Tenants
- Funding: How ORP Money and TEP Evidence Fit Together
- Where Tricity Labs Fits Into a Target Energy Pathways Programme
- Sources
What Are Target Energy Pathways?
A Target Energy Pathway is a plan for a single home, setting out the sequence of measures needed to move that property from its current energy performance to an agreed target — and, critically, the evidence base used to justify that route. It sits inside the Welsh Housing Quality Standard 2023, which asks every registered social landlord and local authority in Wales to produce one for every property in their stock. Unlike a generic retrofit specification, a TEP is meant to be specific to the home in question, informed by how it actually performs rather than by a generic archetype.
The deadlines are fixed and phased. Landlords need 75% of full TEPs completed by 1 September 2026, rising to 100% coverage by 31 March 2027. That timeline leaves relatively little room for landlords who haven't yet started building the underlying evidence base, which is why many are looking at this now rather than waiting.
TEPs don't exist in isolation. WHQS 2023 also requires a Whole Stock Assessment and an accompanying Data Quality Improvement Plan, both of which feed directly into the quality of the pathways produced. Read together, these three requirements form a single compliance chain: assess the stock, close the data gaps, then produce a pathway per property that reflects what's actually known about that home.
Why Target Energy Pathways Depend on Measured Baseline Data
The whole premise of a TEP is that it should reflect how a home actually performs, not what a standard assessment procedure predicts it should perform like. Modelled figures — the kind produced by SAP or similar tools — are useful starting points, but they carry known accuracy gaps, particularly for older housing stock, non-standard construction, and homes where occupant behaviour varies widely. A pathway built entirely on modelled assumptions risks recommending the wrong measures, in the wrong order, for the wrong reasons.
Measured baseline data closes that gap. In practice this means continuous, dated records of indoor temperature, humidity, occupancy, and energy consumption, gathered per property over a meaningful period before retrofit works begin. That baseline becomes the reference point against which any later improvement — or lack of it — can be judged with some confidence.
Without that baseline, landlords are left arguing from assumption rather than evidence when Welsh Government asks how a pathway was derived. That's a weak position to be in, especially given how directly this evidence links to funding compliance under ORP.
Start capturing measured baseline data before any retrofit works begin, even if the TEP itself isn't due for months. A genuine before-and-after comparison is only possible if the 'before' data actually exists.
The Data Quality Improvement Plan: Closing the Evidence Gap
WHQS 2023 doesn't just ask landlords to produce pathways — it asks them to show their working. The Data Quality Improvement Plan requirement exists precisely because most landlords' existing stock data has gaps: incomplete surveys, outdated EPCs, missing occupancy records, or energy consumption figures that were estimated rather than measured.
A credible plan starts with an honest audit of what data already exists, where it came from, and how reliable it is. From there, the plan should set out, property by property or archetype by archetype, how the remaining gaps will be filled — usually through a combination of site surveys and ongoing environmental monitoring rather than one-off assessments.
This is where environmental monitoring earns its place as more than a compliance checkbox. Deployed properly, it generates the continuous, dated evidence that a Data Quality Improvement Plan is supposed to produce, without requiring someone to manually chase down figures every time an audit comes around.
Treat the Data Quality Improvement Plan as a live audit trail rather than a one-off document. Welsh Government can request evidence of progress at any point in the programme, not just at the final compliance deadline.
A Practical Target Energy Pathways Checklist
Before compiling a full pathway for a property, it's worth confirming that certain pieces of evidence actually exist and are current. This isn't a formal regulatory checklist, but a practical starting point that most landlords find useful when triaging where their stock data is strongest and weakest.
At minimum, each property file should be able to show a current EPC or SAP rating, measured indoor temperature and humidity readings over a representative period, an assessment of damp and condensation risk, a record of any retrofit measures already installed, and a proposed sequence of further measures aligned to a fabric-first, whole-house approach. Occupancy patterns matter too — a home that's rarely heated behaves very differently from one that's occupied and heated continuously, and a pathway that ignores that distinction will misjudge the intervention needed.
Just as important as the data itself is how it's held. Evidence needs to be dated, timestamped, and retained in a form that can be produced on request, ideally with some element of independent verification rather than relying solely on self-reported figures from the landlord or contractor involved.
How to Evaluate Target Energy Pathways: Best Practices
Once pathways exist across a stock, the harder question becomes whether they're any good — consistent, well-sequenced, and genuinely grounded in evidence rather than convenience. One of the clearest signs of a weak pathway is when the recommended measures cluster around whatever is cheapest or easiest to install, rather than what the measured data actually points to.
Good practice follows the fabric-first, whole-house approach that ORP guidance itself sets out: insulation and fabric improvements ahead of heating system changes, and heating changes ahead of purely cosmetic upgrades, unless the measured data gives a specific reason to deviate. Sequencing errors here are common and expensive to unwind later.
Benchmarking pathways against similar property archetypes across the stock — and ideally against sector-wide performance data — helps catch outliers that don't fit the pattern for their type. This is also where independent evidence bodies add real value: a pathway that's been checked against BS 40101 Building Performance Evaluation standards carries more weight with Welsh Government, funders, and boards than one produced entirely in-house.
Target Energy Pathways for Housing Associations, Contractors, and Tenants
The compliance obligation sits with the landlord, but the evidence a TEP relies on is generated and experienced by different groups. Housing associations carry the reporting burden across their whole stock and need aggregated, comparable evidence rather than a patchwork of formats from different surveys and contractors over the years — a challenge covered in more depth for housing associations specifically.
Contractors delivering the retrofit works themselves need clarity on exactly what evidence they're expected to generate on site, and in what format, so it feeds cleanly into the pathway rather than sitting in a separate paper trail. Ambiguity here is one of the most common reasons TEP evidence ends up incomplete or inconsistent across a programme.
Tenants, meanwhile, live with the outcome of the pathway and are often the most reliable ongoing source of measured data — comfort levels, damp complaints, heating patterns — provided they're engaged as participants rather than an afterthought. A pathway that ignores tenant experience risks looking good on paper while missing what's actually happening in the home.
Funding: How ORP Money and TEP Evidence Fit Together
The Optimised Retrofit Programme confirmed £98.75 million for 2026/27, and one detail is easy to miss amid the headline figure: environmental monitoring is listed as a mandatory element of ORP-funded projects, not an optional extra bolted on at the end. That matters because it means the evidence needed for TEPs and the funding to gather it aren't separate problems.
ORP guidance treats environmental and energy monitoring as a distinct eligible category, alongside smart heating controls as another. Where a single technology qualifies under both categories, it can be funded as part of an ORP package rather than procured as an additional line item — which changes the economics of building a proper evidence base considerably.
ORP also requires an open-book approach, with evidence of outputs available to Welsh Government throughout the programme rather than compiled retrospectively at the end. Continuous, dated monitoring records satisfy that requirement almost by default, whereas periodic manual surveys tend to leave gaps precisely when scrutiny increases.
Where Tricity Labs Fits Into a Target Energy Pathways Programme
None of the above requires a particular vendor, but it does require reliable measured baseline data collected continuously and independently — which is the specific gap Verity is designed to fill. Verity measures temperature, humidity, and occupancy per property on an ongoing basis, qualifying under ORP as both an environmental monitoring technology and a smart heating control, which is why it can often be funded as part of an existing package rather than as an extra cost.
Beyond raw data collection, tools like Detect and Evidence help turn that stream of readings into something usable for compliance purposes — flagging damp risk early and assembling the kind of dated, defensible record a Data Quality Improvement Plan is supposed to produce. Verify supports the independent BS 40101 verification that gives pathways credibility beyond self-reported figures.
For landlords managing pathways across hundreds or thousands of properties, Benchmark and the Stock Performance Index make it possible to compare archetypes, spot pathways that look inconsistent with similar homes, and evaluate best practice across a whole portfolio rather than property by property. You can see how these pieces connect on the Tricity Labs platform, or look at the underlying retrofit evidence approach in more detail.
If you're mid-way through building TEPs and unsure whether your existing data will hold up to scrutiny, a short conversation is usually enough to identify the gaps — and whether ORP funding can cover closing them.
Photo by ClickerHappy via Pixabay (source)
Related reading: Target Energy Pathways for housing associations, contractors delivering retrofit works, tenants engaged as ongoing data sources, independent retrofit evidence approach, Tricity Labs platform, more about Tricity Labs
Sources
About Tricity Labs
The team behind Tricity Labs' Verity platform, delivering independent pre- and post-retrofit measurement and verification from existing smart meter data for housing associations and retrofit contractors.