Hotel: DEFRA 🇬🇧

Calculate hotel stay emissions with the UK Department for Environment, Food & Rural Affairs (DEFRA) Conversion Factors, pinned to a specific year or using the latest supported year.

type hotelmethodology DEFRASupports audit mode

Overview

DEFRA has pioneered carbon accounting standards across many sectors. For hotels, the DEFRA methodology emphasizes transparency and consistency. Its guidelines account for the different energy consumption patterns of hotel types, from luxury resorts to budget motels. They cover direct energy use, including heating, cooling and electricity, and also indirect emissions from supply chain activities, food and beverage services, waste disposal and guest transportation.

The methodology also emphasizes adaptability and continuous improvement. Hotels are encouraged not only to measure and report their carbon footprint but also to act to reduce it. With specific guidance on reduction strategies, from energy-efficient appliances to waste reduction, DEFRA's approach helps the hotel sector contribute to broader sustainability goals.

Versioning

Add methodology_version to pin a specific Conversion Factors year, for example "2024". If you leave it out, SQUAKE applies the latest supported year. Pin a specific year for reproducibility and auditability.

Sample requests

Send a quote before booking, then repeat the call with audit set to true once the booking is final.

{
  "expand": ["items"],
  "items": [{
    "audit": false,
    "type": "hotel",
    "methodology": "DEFRA",
    "external_reference": "string",
    "country": "GB",
    "city": "London",
    "number_of_nights": 2,
    "methodology_version": "2024"
  }]
}

audit_for is optional

Pass the ID of an auditable entity when you calculate on behalf of that entity. Otherwise, leave it out.

Defaults

Field	Default	Applies when
`country`	`GB`	No `country` is sent
`methodology_version`	Latest supported DEFRA year	No `methodology_version` is sent

Request fields

typestringrequired

hotel

methodologystringrequired

DEFRA

methodology_versionstring

DEFRA Conversion Factors year, such as "2024". If you leave it out, SQUAKE uses the latest supported year.

external_referencestring

Your identifier for the item, up to 128 characters, so you can match the response to the request.

countrystring

ISO 3166-1 alpha-2 or alpha-3 code, 2 to 3 characters.

citystring

Only "London" within "GB" is supported.

number_of_nightsinteger

Minimum 1.

auditboolean

Set to true to create immutable audit records for finalised calculations. Must be enabled for your account.

See every field of POST /v2/calculations in the API reference

Sample response

200 OKapplication/json

{
  "carbon_quantity": 23000,
  "carbon_unit": "gram",
  "items": [{
    "carbon_quantity": 23000,
    "carbon_unit": "gram",
    "external_reference": "string",
    "type": "hotel",
    "methodology": "DEFRA",
    "methodology_version": "2024"
  }]
}

Bibliography

UK Government, Greenhouse gas emissions: research and statistics. Read on GOV.UK.
Government Greenhouse Gas Conversion Factors for Company Reporting: Methodology (latest year).

Hotel: DEFRA 🇬🇧

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