EPCs · Retrofit Assessment · Retrofit Coordination
Retrohaus is an accredited energy consultancy based in Coventry. We produce Energy Performance Certificates, carry out PAS 2035 retrofit assessments and coordinate retrofit projects across the Midlands, with independent advice on heat pumps, solar PV and the grants that help pay for them.
Accredited. Audited. Independent.
Accredited and accountable
Our assessors are accredited through Elmhurst Energy, ECMK and Quidos, the government-approved schemes that train, insure and audit energy assessors. Retrohaus is also registered with TrustMark, the Government Endorsed Quality Scheme.
How to check our accreditation
Our commitments
What we do
An Energy Performance Certificate shows how a building performs today. A retrofit assessment works out what it needs. Retrofit coordination checks that the work is designed and installed to deliver it. We do all three, for single homes and for whole programmes.
Needed whenever a home or a commercial building is sold, let or newly built, and valid for 10 years. We survey in person, lodge the certificate on the government register and send you the digital copy.
The whole-home survey that the Warm Homes schemes require before any improvement work, and the sensible first step when you are paying for it yourself. Condition, occupancy, ventilation and energy, recorded in one visit.
A Retrofit Coordinator takes responsibility for a project from the first survey to TrustMark lodgement: the improvement plan, the design checks, the site inspections and the evidence that the work was done properly.
Certificates for single lets, HMOs and portfolios, with a clear view of what band C by 2030 means for each property.
Read moreNon-domestic certificates for shops, offices, industrial units and mixed-use buildings being sold or leased.
Read moreWhich improvements move your rating, in what order, and what they are likely to cost. Heat pumps, solar and grants included.
Read moreMeasured floor plans for sales, lettings and licence applications. Often drawn from the same visit as your EPC.
Read moreThese are the figures our prices start from. Yours depends on the size and layout of the property, and we confirm it before you book. Retrofit assessment, retrofit coordination and energy advice are quoted for the property or the programme.
How our prices workWho we work with
Homeowners, landlords and agents come to us for certificates and straight advice. Housing providers, councils and installers come to us for the assessment and coordination that funded retrofit depends on. The survey is carried out to the same standard for all of them.
Retrohaus Energy Consultancy provides retrofit assessment and retrofit coordination for homes improved under Warm Homes schemes, working with social housing providers and local authorities. We also support solar PV and air source heat pump (ASHP) installers, including the work they deliver under grant schemes.
An EPC for a sale, a retrofit plan for the next 10 years, or a straight answer on whether a heat pump or solar panels suit your home.
Certificates for single lets, HMOs and portfolios, floor plans for listings and licences, and a costed route to band C by 2030.
PAS 2035 retrofit assessment and coordination for homes improved under the Warm Homes: Social Housing Fund and the Warm Homes: Local Grant.
An independent assessor and Retrofit Coordinator for your funded and private work, with the evidence file and the TrustMark lodgement handled properly.
Why evidence matters
Since 1 October 2026 every domestic energy assessor in England and Wales has had to meet new minimum evidence requirements. The test is simple: an auditor must be able to reproduce the certificate from the assessor's photographs, measurements and notes alone.
That suits the way we already work, and it protects you. Where something cannot be seen or proven, the calculation has to fall back on assumptions for a home of that age, and the rating usually suffers. Good evidence is how insulation hidden behind plaster or under loft boards gets counted, and it is what a retrofit plan has to stand on.
How to prepare for your assessmentA floor plan for every level, in metres to two decimal places, with each window sized and its direction noted.
Every elevation, the depth of the loft insulation, the boiler's data plate, the heating controls and the meters.
Certificates and guarantees for work nobody can see, such as cavity wall insulation, replacement glazing or a solar installation.
Lodged through a government-approved scheme that checks our work. Your certificate carries our assessor's name.
Grants and renewable energy
We do not install heat pumps or solar panels and we do not hand out grants. We survey buildings, which puts us in a good position to tell you what yours needs first, what help exists and what each change would do to its rating.
£7,500 towards a heat pump through the Boiler Upgrade Scheme, funded upgrades for eligible low-income households, and no VAT on installing insulation, heat pumps or solar panels until 31 March 2027.
What is open nowUp to three or four units of heat for each unit of electricity. Whether one suits your home depends on the heat it loses, and that is what we measure.
Is your home ready?What a typical system costs, how long it takes to pay back, what you are paid for exports, and what solar does to an EPC.
What to expect86% of households in England heat with gas, and the UK has been a net importer of gas since 2004. Efficient buildings are part of the answer.
The picture in figuresFigures from GOV.UK, the Energy Saving Trust, the English Housing Survey and the Digest of UK Energy Statistics, checked October 2026. Sources are listed on each page.
Before you book
An EPC lasts 10 years and belongs to the property, not the owner. Enter a postcode and we will take you to the government register, where you can see the current rating and the date it runs out.
If it has expired, or the home has been extended or given new windows or heating since, a new assessment is worth having. That is where we come in.
Opens the official register in a new tab. It is free, and it shows the rating and the expiry date.
How it works
Call, email or send the form. Give us the property type, its size and the postcode, and we reply within 24 hours with a clear price.
Most visits are booked within 24 to 48 hours. Let us know if a tenant or an agent will be giving access.
An EPC visit takes 30 minutes to 1 hour for most homes, and a retrofit assessment 1 to 2 hours. We need to see every room, the loft, the heating and the meters. Nothing is drilled or disturbed.
Your EPC goes onto the government register and the digital copy comes to you, with a plain-English note on what would improve the rating. A retrofit assessment goes to your coordinator, or to ours.
For landlords
In January 2026 the government confirmed that privately rented homes in England and Wales must reach the equivalent of EPC band C by 1 October 2030, with spending capped at £10,000 per property. A home that earns a band C certificate before 1 October 2029 is treated as compliant until that certificate expires.
If your EPC was issued before 15 June 2025 it used the older method. A fresh assessment shows where the property stands now and what reaching C is likely to involve.
Letting below E without a registered exemption can bring fines of up to £5,000 per property.
A band C certificate obtained before this date counts as compliant until it expires.
One date for new and existing tenancies, with penalties of up to £30,000 per property.
Source: GOV.UK consultation outcome on privately rented homes, 21 January 2026. Regulations are expected in 2027 and the detail may change. Reviewed October 2026.
Where we work
Certificates, retrofit assessment, retrofit coordination, energy advice and floor plans are all available in every area below. Most of our surveys are within 25 miles of Coventry, which keeps travel short and appointments flexible. Retrofit coordination is available nationwide.
Common questions
Short answers taken from GOV.UK and the accreditation schemes, checked in October 2026.
All EPC questionsYou need one whenever a property is sold, let or newly built. It has to be ordered before the property is marketed, and buyers or tenants are entitled to see it. If a valid certificate already exists, you can keep using it.
Our domestic EPCs start from £50, commercial EPCs from £150 and floor plans from £35. The price for your property depends on its size and layout. Send us the postcode and the number of bedrooms and we will confirm a single figure before you book, with no hidden fees. Our guide to EPC prices explains what moves the price up or down.
30 minutes to 1 hour for most homes, depending on size and layout. We need access to every room, the loft, the boiler and the meters. The survey is non-invasive: nothing is drilled or lifted. A retrofit assessment is a fuller survey and typically takes 1 to 2 hours.
An EPC gives a building a rating from A to G and a short list of recommendations. A retrofit assessment is a fuller survey under PAS 2035, the national retrofit standard. It also records the condition of the home, how it is lived in and how it is ventilated, so that improvements can be planned safely. We can carry out both in one visit.
Whenever work has to follow PAS 2035, which includes publicly funded schemes such as the Warm Homes: Local Grant and the Warm Homes: Social Housing Fund. The Retrofit Coordinator produces the improvement plan, checks the design and the installation, and lodges the finished project with TrustMark. On privately funded work the role is optional, and it is good protection against measures that do not work together.
Possibly. The Boiler Upgrade Scheme gives £7,500 towards an air source or ground source heat pump in England and Wales. The Warm Homes: Local Grant funds insulation, solar panels and heat pumps for eligible low-income households in homes rated D to G. We do not award grants, but our guide to grants and schemes sets out what is open and who qualifies.
Visits are usually booked within 24 to 48 hours. If you have a completion date or a tenancy start to meet, tell us when you enquire and we will work to it.
Every certificate names the assessor and their accreditation scheme, and anyone can look an assessor up on the government's find an assessor service. TrustMark registration can be checked on the TrustMark website. Our accreditations page shows you how to do both.
Get a quote
Send the property type, size and postcode. We reply within 24 hours with a clear price, and most visits are booked within 24 to 48 hours.