Retrofit Assessor Consultancy · UK

Retrofit Assessor Consultancy UK – PAS 2035 Retrofit Assessments

Professional property assessments that identify energy-efficiency improvements, potential risks and suitable retrofit measures — the initial assessment required for a PAS 2035 project, carried out across the UK.

Free ECO4 eligibility check included

The role

What Does a Retrofit Assessor Do?

A retrofit assessor evaluates the property from both an energy-efficiency and building-condition perspective. Unlike a standard EPC, a PAS 2035 assessment is a more detailed inspection of construction, insulation, heating, ventilation and potential risks. The assessment can include:

  • Internal & external property inspections
  • Review of existing energy performance
  • Assessment of walls, floors, roofs & insulation
  • Heating system assessment
  • Ventilation assessment
  • Thermal imaging where appropriate
  • Identification of potential energy-saving measures
  • Assessment of condensation & damp risks
  • Identification of potential structural concerns
  • Preparation of a detailed assessment report
  • Review of potential ECO4 funding opportunities

The objective is clear, practical information that supports the next stage of a retrofit project.

Thermal imaging during a retrofit assessment
The inspection

PAS 2035 Property Inspection

PAS 2035 places importance on assessing the property before improvement measures are designed and installed. We gather the information needed to understand its existing condition and identify suitable opportunities.

External inspection

Construction, Fabric & Exposure

The external inspection helps determine whether proposed improvements suit the property’s existing construction. It can consider:

  • Wall construction (solid or cavity)
  • Cavity width where applicable
  • Property exposure
  • Brickwork & pointing
  • Render condition
  • Signs of damp or visible issues
  • Other external characteristics
External inspection of brickwork and construction
Internal inspection

Room-by-Room Assessment

  • Existing insulation
  • Loft insulation depth
  • Windows & glazing
  • Doors
  • Heating systems
  • Boiler type & age
  • Heating controls
  • Extract fans
  • Air bricks
  • Trickle vents
  • Other ventilation provisions

Thermal imaging can also help identify areas where heat loss or thermal performance may require further investigation.

The deliverable

What’s in a Retrofit Assessment Report?

A structured overview of the property and potential improvement measures — the suitability of each measure depends on the property’s construction, condition and circumstances.

What the report captures

Property Information

  • Property type
  • Construction period
  • Existing EPC rating
  • Estimated energy performance
  • Relevant property characteristics
Potential improvements

Recommended Retrofit Measures

  • Loft insulation
  • Cavity wall insulation
  • Internal wall insulation
  • External wall insulation
  • Floor insulation
  • Heating system upgrades
  • Boiler replacement
  • Heat pump suitability
  • Solar panel suitability
  • Ventilation improvements
Considered before recommending

Risk Identification

  • Condensation risks
  • Damp issues
  • Structural concerns
  • Ventilation problems
  • Asbestos concerns where suspected
Funding

Retrofit Assessor consultancy & ECO4 Support

For eligible households, retrofit improvements may be supported through ECO4 funding or ECO4 Flex arrangements. Our consultancy reviews relevant eligibility information and identifies measures that may be suitable for funding consideration.

  • Review eligibility information
  • Identify potentially fundable measures
  • Explain the assessment findings
  • Prepare information for the next stage

An assessment does not automatically guarantee funding — eligibility and funding decisions depend on the applicable scheme requirements and individual circumstances.

Homes that may be eligible for ECO4-supported retrofit
How it works

How Our Retrofit Assessor Consultancy Works

From first consultation to referral for coordination — a clear, practical route.

1

Initial Consultation

Your propertyEnergy concernsRetrofit objectivesPotential ECO4 eligibility
2

On-Site Retrofit Assessment

Qualified assessor visitInternal & external inspectionApprox. 2–4 hours
3

Assessment Report

Property informationExisting energy performanceRecommended improvementsPotential risksEstimated costs & savingsFunding information
4

ECO4 Application Support

Where applicableSubject to eligibilitySupport with the application
5

Retrofit Coordination

Refer to a retrofit coordinatorProject planning & managementNext stages of the project
Know the difference

Retrofit Assessment vs EPC

An EPC gives a rating and generic recommendations. A PAS 2035 retrofit assessment goes further — and for an ECO4-supported project it is required rather than relying solely on an existing EPC.

EPC

Energy Performance Certificate

  • Energy-efficiency rating
  • Generic improvement recommendations
  • Based on standard assumptions
  • Not sufficient for an ECO4 retrofit
Recommended

PAS 2035 Retrofit Assessment

  • Detailed building & construction survey
  • Condition, risks & suitable measures
  • Room-by-room + external inspection
  • Required for ECO4-supported retrofit
Why Compliant Retrofits

Why Choose Our Retrofit Assessor Consultancy?

The initial assessment is the foundation for every retrofit decision that follows — so it pays to get it right.

PAS 2035-Focused Assessments

Structured around the requirements of the retrofit process.

Qualified Assessors

Assessors hold recognised qualifications and are PAS 2035 certified.

Detailed Property Inspections

We assess construction, insulation, heating and ventilation — not just the existing EPC.

Thermal Imaging & Diagnostics

Where appropriate, thermal imaging supports identification of thermal-performance issues.

ECO4 Expertise

We can review potential eligibility and support relevant funding processes.

Clear, Practical Reports

Recommendations presented in a structured format so owners understand priorities.

Free Initial Consultation

Discuss your property and requirements before proceeding with the assessment.

Questions answered

Frequently Asked Questions

How long does a retrofit assessment take?
Typically 2–4 hours, depending on the size and characteristics of the property.
Do I need a retrofit assessment for ECO4?
ECO4 requires a PAS 2035 retrofit assessment.
Can I use my existing EPC instead?
No. An existing EPC does not replace a PAS 2035 retrofit assessment, which involves a more detailed inspection of the property.
How much does a retrofit assessor consultancy cost?
As a guide, £300–£800 depending on property size — and ECO4 may cover the cost for eligible households.
Is the assessor PAS 2035 certified?
Our assessors are PAS 2035 certified and Elmhurst Energy registered.
What is a Retrofit Assessor?
A Retrofit Assessor is a qualified professional who assesses a dwelling’s condition, energy performance and other relevant characteristics to provide information for retrofit planning under PAS 2035.

Book Your Retrofit Assessor Consultancy in the UK

A structured assessment of your property that identifies potential retrofit measures and highlights the risks to consider before work begins. Book your PAS 2035 retrofit assessment today.

Free ECO4 eligibility check included