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The certificate everything else starts with.
Domestic EPCs across Chertsey and Surrey, by accredited assessors, usually lodged within 48 hours.
What an assessor actually records
An EPC is not an opinion. It is a standard assessment fed into a national calculation, and it is evidence-based.
The construction of the house
Wall type and thickness, roof and loft depth, floor, windows and their glazing. Measured and recorded, not estimated from the street.
How it is heated
Heat source, controls, zoning, hot water and cylinder insulation. What is actually there on the day.
Any generation
Solar PV and other on-site generation, with the paperwork to evidence it.
And evidence for all of it
Where there is no visible proof, the software assumes the worst case. Keeping your insulation and installation certificates is worth real points.
When you need one
- Selling or letting
- Legally required before marketing, and it has to be available to prospective buyers or tenants.
- Landlords, MEES
- Domestic property cannot be let below band E without a registered exemption.
- Funded schemes
- Warm Homes: Local Grant and ECO4 both start from the EPC band. The Boiler Upgrade Scheme no longer asks for an EPC at all.
- After improvement work
- A new EPC after insulation or a heat pump both proves the work and updates the record.
What would move your band?
Two questions. What moves a band depends on the property.
Roughly what band are you now?
What is already done?
Insulation is where the movement is
For most properties at D, E, F or G with little done, loft and wall insulation are the single biggest lever on the score.
Insulation is where the movement is
For most properties at D, E, F or G with little done, loft and wall insulation are the single biggest lever on the score.
- Loft insulation is the cheapest measure on the list
- Wall construction is one of the heaviest weighted inputs
- It is also what funded schemes are built around
- And it makes any heating measure afterwards smaller
- The assessment records depth and construction, so it has to be evidenced
The heating system is the next lever
With the fabric already done, how the house is heated is usually what is holding the score where it is.
- A heat pump scores differently from a gas boiler
- Controls and zoning are recorded by the assessor
- £7,500 off through the Boiler Upgrade Scheme
- Hot water and cylinder insulation count too
- The assessment is evidence-based, so keep the paperwork
Generation is what is left
Fabric and heating done, so on-site generation is the remaining lever.
- Solar PV is recorded and affects the score
- Battery storage is not scored the same way as generation
- 0% VAT on solar and battery until 31 March 2027
- At this point the gains are smaller and more expensive per point
- Worth checking what the current certificate actually recommends first
Directional only. An EPC score comes from a full assessment of your actual property, and no measure guarantees a particular band.
How it runs
A date
Usually within a few days, and it does not need to be a whole morning of your time.
45 to 90 minutes
Room dimensions, construction, heating, controls and photographs as evidence. Loft access needed if there is one.
Certificates help
Insulation, boiler, window and solar paperwork all count. Without evidence the software assumes the worst.
Lodged
The certificate goes on the national register and is publicly searchable.
The recommendations
A list of measures with indicative impact. We will go through what is worth doing and what is not.
After the report lands
The certificate is the start of a conversation, not the end of one.
Lodged and searchable
On the national EPC register, valid for ten years, and available to anyone who needs to see it.
The recommendations, explained
The report lists measures. We will tell you which are worth doing on your property and which are software defaults.
Work that improves it, guaranteed
Anything we then install carries a two year workmanship guarantee, in writing and insurance-backed.
Questions after the report
The assessor and the installer are the same company, so nothing gets lost between them.
Two things people ask about next
Both have a page of their own.
The questions we get asked most
How long does an EPC take?
Forty-five to ninety minutes at the property for a typical house, and the certificate is usually lodged within 48 hours.
How long is it valid?
Ten years, unless you improve the property and want a new one to reflect it.
What band do I need to let a property?
Domestic property cannot be let below band E without a registered exemption.
Will insulation improve my rating?
Usually, and on most properties it is the biggest single lever. How much depends on the property, which is what the assessment establishes.
Does a heat pump improve it?
It changes how the heating is scored, and on a well insulated house it usually helps. On a poorly insulated one, insulate first.
Do I need to be there?
Someone needs to let the assessor in and give access to the loft, the boiler and the meter.
Can you do the work as well?
Yes, and we will tell you which recommendations are worth acting on. The assessment and the installation are the same company.
Often worth doing at the same time
Same team, same survey, one visit where it makes sense.
Book an EPC assessment
Tell us about the property and we will confirm the price and book a date. Most certificates are lodged within 48 hours of the visit.
- A fixed price, confirmed before we book
- 45 to 90 minutes at the property
- Lodged on the national register, usually within 48 hours
- Weekdays 8am to 5pm, on 01932 550828
Book an assessment.
Usually within a few days, and lodged within 48 hours of the visit. If you are planning work, it is worth doing before rather than after.