A domestic EPC is only as good as the survey behind it. The assessor spends an hour in the property recording fabric, services and dimensions, then feeds that data into RdSAP software that produces the rating. The weak link is the survey record. If a wall type is unclear or a measurement is missing, the assessor either guesses or drives back. So the real question about an EPC assessor app is not which one has the most features. It is which tool gets the full survey captured before the assessor leaves the door.
Guide · Energy assessment
EPC assessor report app for the UK.
A practical guide to capturing domestic energy assessment survey data on site, from clipboard and RdSAP software to a WhatsApp workflow your assessors already know, so the record is complete before you leave the property.
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The point
Software does not make the EPC valid.
The accredited assessor does, working to the RdSAP conventions under an approved scheme. Software makes the survey data easier to capture in full on site, harder to leave a room unmeasured, and faster to hand to the RdSAP calculation. A good tool means nobody guesses a wall type from memory once they are back at the desk.
Where it fits the survey
The data an EPC assessor gathers on site.
Fabric
Walls, roof and glazing
Construction age band, wall type, insulation evidence, loft and glazing, recorded with photos as the assessor walks the property.
ServicesHeating and hot water
Boiler make and model, controls, cylinder and any secondary heating, captured as evidence rather than recalled later.
MeasurementsDimensions and rooms
Room dimensions, storey heights and heat loss perimeter, logged room by room so nothing is estimated at the desk.
The friction
The gaps show up back at the desk.
An assessor who scribbles on a floor plan and photographs a boiler often finds a missing measurement or an unclear wall type when the RdSAP software asks for it that evening. A second visit costs a morning. Capturing the full data set at the point of observation, prompted item by item, is what prevents the return trip.
Run EPC surveys on WhatsApp
No app install. No training.
Assessors use the phone they already have. Text, voice note or photo. The survey record assembles itself for the RdSAP entry. Setup to first live workflow usually takes under a week.
The short version
- A domestic EPC rating is produced by RdSAP from survey data the assessor gathers on site: fabric, heating, hot water and dimensions.
- The assessor must be accredited and registered with an approved scheme; the software does not confer that competence.
- Missing or unclear survey data means a guess or a second visit. Capturing it in full on site is what prevents both.
- Under the MEES regulations, most rented domestic property must reach at least an EPC band E to be let lawfully, so the accuracy of the survey matters to landlords.
- Per-report pricing beats per-seat for firms with a mix of field assessors and office staff, because adding people is free.
- The software captures the evidence and structures the record. The accredited assessor carries the validity.
The point
What an EPC assessor app is actually for
A domestic Energy Performance Certificate is generated by RdSAP, the Reduced Data Standard Assessment Procedure, from data collected during an on-site survey. A Domestic Energy Assessor visits the property and records its age and construction, wall and roof type, insulation evidence, glazing, the heating and hot water systems and their controls, and the room dimensions that drive the heat loss calculation.
Software does not make an EPC valid. The accredited assessor does, working to the RdSAP conventions and registered with an approved accreditation scheme. What software does is make that survey data easier to capture in full on site, harder to leave incomplete, and faster to move into the RdSAP calculation. The tool's job is to make on-site completion the path of least resistance so nothing is reconstructed from memory later.
The survey
Fabric, services and dimensions
An RdSAP survey has a defined shape. Fabric: the age band and construction of the walls, the roof and loft, floor type, and any insulation the assessor can evidence. Services: the main heating system make and model, its controls, the hot water cylinder and any secondary heating. Dimensions: room-by-room measurements, storey heights and the heat loss perimeter.
Quickler prompts for each of these as the assessor walks the property, with photos attached at the point of observation rather than sorted out later. The office sees the survey status on a dashboard without chasing. It does not perform the RdSAP calculation or replace the assessor's judgement on construction type and insulation evidence, which is exactly where accuracy lives.
Why accuracy matters
MEES and the band E floor
Under the Minimum Energy Efficiency Standards, most domestic property in the private rented sector in England and Wales must reach at least an EPC band E before it can be let, subject to exemptions. Scotland operates its own rules. That makes the survey behind the certificate a commercial decision for the landlord, not just a formality, because a marginal rating can turn on whether a wall's insulation was correctly evidenced.
An accurate, well-evidenced survey protects both the assessor and the landlord if a rating is later questioned. This is guidance, not legal advice, and the MEES rules and their exemptions change, so check the current regulations for the property's nation before relying on any figure.
Pricing
Per report, not per seat
Most assessment tools and general audit apps charge per seat. For an energy assessment firm that is the wrong shape. The office coordinator who lodges certificates pays the same as the assessor filing four surveys a day, and every self-employed assessor you take on costs more.
Quickler charges per report, with unlimited users on every bundle. Bundles run from Quickler 50 at 50 pounds a month for 50 reports, up to Quickler 500 at 500 pounds a month for 500 reports. Add as many assessors, coordinators and admins as you like; you pay for the surveys you file, not the people who could file them. Pricing is approximate and shifts, so check the current pricing page before you commit.
Questions, answered
What is an EPC assessor app?
It is a tool that helps a Domestic Energy Assessor capture the survey data an EPC needs on site: fabric, heating, hot water and dimensions. The options range from a clipboard and floor plan, to general audit apps, to conversation-based tools like Quickler that run the survey over WhatsApp so there is no app to install. The captured data still feeds your RdSAP software.
Does an EPC assessor app produce the EPC rating?
No. The rating is produced by accredited RdSAP software from the survey data, and the certificate is lodged on the relevant national register by an assessor registered with an approved scheme. Quickler structures and evidences the survey record; it does not run the RdSAP calculation or lodge the certificate. The accredited assessor carries the validity.
Can I capture EPC survey data over WhatsApp?
Yes. Quickler's workflow runs over the WhatsApp Business API. The assessor receives each survey item in their existing WhatsApp chat, replies with text, a voice note or a photo of the boiler plate or wall construction, and the record assembles itself for RdSAP entry. No separate app or login is required, and Quickler manages the WhatsApp Business API account on the firm's behalf.
Does the software help with MEES compliance?
Indirectly. Under the Minimum Energy Efficiency Standards most rented domestic property must reach at least an EPC band E to be let lawfully in England and Wales, subject to exemptions, and Scotland has its own rules. A complete, well-evidenced survey gives the assessor the accurate inputs a defensible rating depends on. This is guidance, not legal advice; check the current MEES rules for the property's nation.