EPC Audit | PropEco

EPC Audit API

Quickly identify errors & inconsistencies within energy performance certificates.

Access comprehensive audits that surface issues that could materially impact the running costs, retrofit options, liveability and value of properties.

In the UK, it is estimated that as many as 50% of Energy Performance Certificates (EPCs) contain at least one error, often stemming from mistakes or assumptions made by assessors.

So while EPCs are becoming increasingly influential in lending decisions and property valuations, they often provide a misleading representation of the running costs, retrofit options, liveability and / or energy efficiency of properties. In many cases, this can lead to properties being downgraded to a lower EPC band after a new assessment.

Change in EPC rating*

*Based on a sample of 1.1 million UK properties that have had two EPC inspections within the past 10 years. Analysis found that the energy efficiency score of 23% fell in the second inspection, resulting in almost 10% being downgraded by one band or more.

PropEco's EPC Audit service applies hundreds of checks to identify errors and inconsistencies that could impact the utility and value of a property. This assessment helps property professionals and home buyers make better-informed decisions - and avoid costly mistakes - when assessing properties.

The PropEco EPC Audit API provides valuable insights into the accuracy & reliability of energy performance certificates, highlighitng issues including:

Errors & omissions

Missing, incorrect or incomplete information.

Process flaws

Duplicate records and unusual inspection patterns.

Attribute inconsistencies

Unexpected changes and mis-aligned property features.

Extreme values

Outlier projections and property features.

Evidence of upgrades

Indications of property changes and permitting requirements.

Access comprehensive assessments with just four lines of code and a UPRN.

{
	"meta_data": {
		"uprn": 100012365512,
		"address1": "The Firs",
		"address2": "Parkfield Road",
		"address3": null,
		"postcode": "WA16 8NP",
		"post_town": "Knutsford",
		"local_authority": "E06000049",
		"local_authority_label": "Cheshire East",
		"constituency": "E14000987",
		"constituency_label": "Tatton",
		"county": null,
		"data_quality_score": 81.94444444444444,
		"lodgement_date": "2023-01-26T00:00:00.000Z",
		"epc_in_date": true,
		"epc_age": 76966487812,
		"epc_expiry": "2033-01-26T00:00:00.000Z",
		"points_to_upgrade": 10,
		"points_to_downgrade": 5
	},
	"time_series": [
		{
			"inspection_date": "2023-01-26T00:00:00.000Z",
			"lodgement_date": "2023-01-26T00:00:00.000Z",
			"energy_rating_current": "D",
			"energy_efficiency_current": 59
		},
		{
			"inspection_date": "2013-07-05T00:00:00.000Z",
			"lodgement_date": "2013-07-11T00:00:00.000Z",
			"energy_rating_current": "E",
			"energy_efficiency_current": 39
		}
	],
	"process_issues": [],
	"missing_information": [
		{
			"code": "B2",
			"description": "Assumptions detected",
			"details": "Assumptions detected in roof description, floor description and walls description."
		}
	],
	"historical_building_features_discrepancies": [
		{
			"code": "C3",
			"description": "Changing construction age band",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": "Before 1900",
			"to_value": "1900-1929"
		},
		{
			"code": "C5",
			"description": "Changing wall type",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": "solid",
			"to_value": "cavity"
		},
		{
			"code": "C7",
			"description": "Changing floor type",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": "suspended",
			"to_value": "solid"
		}
	],
	"declining_energy_efficiency": [],
	"attribute_inconsistencies": [],
	"current_potential_discrepancies": [
		{
			"code": "F7",
			"description": "Potential hot water cost is higher than current hot water cost",
			"current": 156,
			"potential": 157
		}
	],
	"extreme_values": [
		{
			"code": "G1",
			"description": "Outlier floor area",
			"details": "Floor area more than 20% larger than standard",
			"value": 566
		},
		{
			"code": "G2",
			"description": "Outlier energy costs",
			"value": 9244.2,
			"details": "Estimated energy costs are 5.0x UK average household energy costs"
		},
		{
			"code": "G3",
			"description": "Outlier carbon footprint",
			"value": 22,
			"details": "Estimated carbon footprint is 4.4x UK household average"
		}
	],
	"upgrade_evidence": [
		{
			"code": "H1",
			"description": "Change in total floor area",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": 425,
			"to_value": 566
		},
		{
			"code": "H2",
			"description": "Change in habitable room count",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": 11,
			"to_value": 12
		},
		{
			"code": "H3",
			"description": "Change in heated room count",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": 11,
			"to_value": 12
		},
		{
			"code": "H7",
			"description": "Change in multi-glaze percentage",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": 60,
			"to_value": 100
		},
		{
			"code": "H8",
			"description": "Change in solar water heating flag",
			"from_date": "2013-07-05T00:00:00.000Z",
			"to_date": "2023-01-26T00:00:00.000Z",
			"from_value": null,
			"to_value": false
		}
	]
}