PAS 2035 Retrofit Assessment and Energy Survey Services Across the UK
Get a professional PAS 2035 Retrofit Assessment to understand your property’s current energy performance, heat loss, ventilation and improvement needs. Our UK-wide energy survey provides clear, property-specific recommendations to support EPC improvement, compliant retrofit planning and eligible funded schemes such as ECO4.
What Is a PAS 2035 Retrofit Assessment and Why Does Your UK Property Need One?
A PAS 2035 Retrofit Assessment is the first stage of a compliant whole-house retrofit project. A qualified Retrofit Assessor completes a detailed energy-survey property review to evaluate its condition, energy performance and suitability for improvement measures.
What does a retrofit assessment include?
Thermal imaging to identify heat loss through walls, windows, doors and roofs
Inspection of loft, cavity wall, solid wall and floor insulation
Ventilation, damp, moisture and condensation-risk checks
Assessment of the existing heating system, efficiency and controls
Review of the current EPC rating and potential improvements
Identification of suitable energy-saving measures
Initial ECO4 eligibility review, where applicable
Why is it important?
- Supports PAS 2035-compliant retrofit planning
- Provides the evidence required for many funded retrofit projects
- Identifies suitable and cost-effective property improvements
- Helps prevent problems such as damp, poor ventilation and overheating
- Supports EPC improvement and long-term energy efficiency
- Provides clear recommendations for assessors, designers and installers
What Happens During a PAS 2035 Retrofit Assessment?
Our PAS 2035 Retrofit Assessment follows a clear process to evaluate your property’s condition, energy performance and suitability for improvements.
Before the assessment
- Review of the current EPC, where available
- Initial funding and ECO4 eligibility check
- Explanation of the energy-survey process and required access
During the assessment
- External wall construction and condition checks
- Room-by-room internal inspection
- Thermal imaging to identify heat loss
- Loft insulation and ventilation review
- Heating system, controls and radiator assessment
- Ventilation, air brick and extract-fan checks
- Photographic evidence for the assessment report
The survey typically takes around two to four hours, depending on the property’s size and complexity.
After the assessment
- A detailed retrofit assessment report is prepared
- Suitable insulation, heating and renewable measures are recommended
- EPC improvement opportunities are identified
- Funding eligibility is reviewed, where applicable
- A Retrofit Coordinator may oversee the project from design to completion
What Does a PAS 2035 Retrofit Assessment Report Include?
A PAS 2035 Retrofit Assessment report provides a clear overview of your property’s condition, current energy performance and recommended improvement measures.
Property Information
- Property type, age and construction
- Wall, roof and floor construction
- Existing insulation and ventilation
- Occupancy and condition details
Current Energy Performance
- Existing EPC rating
- Estimated energy use and running costs
- Heat-loss areas
- Carbon-emission estimates
Recommended Retrofit Measures
- Loft, wall and floor insulation
- Heating-system upgrades
- Ventilation improvements
- Heat-pump suitability
- Solar-panel and renewable-energy options
Costs, Savings and Funding
- Estimated cost of each measure
- Potential annual energy savings
- Indicative payback periods
- ECO4 or other funding eligibility, where applicable
How Much Does a PAS 2035 Retrofit Assessment Cost?
The cost depends on the property’s size, construction, condition and survey complexity. The figures below are indicative guide prices only.
| Property Size | Typical Property Type | Indicative Cost |
|---|---|---|
| Small property | 1–2-bedroom flat or terraced house | £300 – £450 |
| Medium property | 3–4-bedroom terraced or semi-detached house | £450 – £600 |
| Large property | 5+ bedroom or detached house | £600 – £800+ |
These prices are indicative and confirmed after reviewing the property and assessment requirements. Eligible households may receive support with assessment costs through ECO4 or another funded scheme, subject to eligibility and supplier approval. Discounted assessment fees may also be available when installation work is completed through Compliant Retrofits.
Why Choose Compliant Retrofits for Your Retrofit Assessment?
Compliant Retrofits delivers professional PAS 2035 Retrofit Assessments and energy-survey services for homeowners, landlords, contractors and housing providers across the UK.
Qualified Retrofit Assessors — assessments completed by experienced professionals in accordance with PAS 2035 requirements
Comprehensive energy surveys — thermal imaging and detailed property inspections to identify heat loss and improvement opportunities
Funding expertise — guidance on ECO4 and other eligible retrofit funding schemes
Detailed assessment reports — clear recommendations to work towards better energy efficiency, EPC ratings and retrofit performance
UK-wide service — supporting retrofit projects across England, Scotland and Wales
Free initial consultation — discuss your property, assessment requirements and available funding options before getting started
Frequently Asked Questions
How long does a PAS 2035 Retrofit Assessment take?
Most assessments take between 2–4 hours, depending on the property’s size, age and complexity.
Do I need a PAS 2035 Retrofit Assessment for ECO4?
Yes. A PAS 2035 Retrofit Assessment is typically required before eligible ECO4 retrofit measures can be designed and installed.
Can my existing EPC replace a Retrofit Assessment?
No. An EPC only provides an energy rating, while a PAS 2035 Retrofit Assessment includes a detailed property inspection and energy survey.
Will the assessor need access to my whole property?
Yes. The assessor will normally need access to all rooms, the loft, heating system and ventilation features to complete the assessment.
What if my property is not eligible for ECO4?
You will still receive a detailed assessment report with recommended energy-efficiency improvements and advice on alternative funding options.
Does Compliant Retrofits provide PAS 2035 Retrofit Assessments across the UK?
Yes. We offer PAS 2035 Retrofit Assessment and energy-survey services for residential retrofit projects across the UK.
Ready to Book Your PAS 2035 Retrofit Assessment?
Book your retrofit assessment today — with a free consultation and ECO4 eligibility check to get started. Call us on 0161 302 1985.