module: bng

Biodiversity net gain

How any natural habitats on the development site will be improved by the proposed works.

Fields

• Biodiversity gain exemption bng-exempt:

  Statement whether the biodiversity gain condition will apply if permission is granted. Householder applicants need to confirm the biodiversity gain condition does not apply.

  Required: True

  Datatype: boolean

  Expected number: 1

• Biodiversity gain condition applies bng-condition-applies:

  Does the applicant believe the Biodiversity Gain Condition applies to this application

  Required: True

  Datatype: boolean

  Expected number: 1

• Biodiversity gain condition exemption reason bng-condition-exemption-reasons:

  Reasons why BNG does not apply, referencing exemptions or transitional arrangements

  Required: False

  Datatype: object

  Expected number: 1 or more

  BNG exemption reason component

  Exemption type

  exemption-type

  The type of biodiversity gain exemption from the bng-exemption-type enum

  Required: True

  Datatype: enum

  Expected number: 1

  Reason

  reason

  The reason the exemption applies to this proposal

  Required: True

  Datatype: string

  Expected number: 1

• Exemption type exemption-type:

  The type of biodiversity gain exemption from the bng-exemption-type enum

  Required: True

  Datatype: enum

  Expected number: 1

• Reason reason:

  The reason the exemption applies to this proposal

  Required: True

  Datatype: string

  Expected number: 1

• Biodiversity net gain details bng-details:

  Comprehensive details about biodiversity net gain assessment including pre-development value, habitat loss information, and supporting documentation

  Required: False

  Datatype: object

  Expected number: 1

  Biodiversity net gain details component

  Pre development date

  pre-development-date

  Date of pre-development biodiversity value calculation, must align with application or justified earlier date

  Required: True

  Datatype: datetime

  Expected number: 1

  Pre development biodiversity value

  pre-development-biodiversity-value

  Calculated biodiversity value in Habitat Biodiversity Units

  Required: True

  Datatype: number

  Expected number: 1

  Earlier date reason

  earlier-date-reason

  Reason for using a pre-development date that is earlier than the application submission

  Required: False

  Datatype: string

  Expected number: 1

  Habitat loss after 2020

  habitat-loss-after-2020

  Indicates whether there has been degradation of onsite habitat(s) after 30 Jan 2020

  Required: False

  Datatype: boolean

  Expected number: 1

  Habitat loss details

  habitat-loss-details

  Details of habitat loss or degradation events

  Required: False

  Datatype: object

  Expected number: 1

  Habitat loss details component

  Loss date

  loss-date

  Date the activity causing habitat loss or degradation occurred

  Required: True

  Datatype: datetime

  Expected number: 1

  Pre loss biodiversity value

  pre-loss-biodiversity-value

  Biodiversity value immediately before habitat loss or degradation occurred, measured in Habitat Biodiversity Units

  Required: True

  Datatype: number

  Expected number: 1

  Supporting evidence

  supporting-evidence

  Description or reference to supporting documents for habitat loss or degradation evidence

  Required: False

  Datatype: string

  Expected number: 1

  Metric publication date

  metric-publication-date

  Publication date of the biodiversity metric tool used for calculations

  Required: True

  Datatype: datetime

  Expected number: 1

  Irreplaceable habitats

  irreplaceable-habitats

  Indicates whether the site contains any irreplaceable habitats

  Required: True

  Datatype: boolean

  Expected number: 1

  Irreplaceable habitats details

  irreplaceable-habitats-details

  Description and references for any irreplaceable habitats identified on the site

  Required: False

  Datatype: string

  Expected number: 1

  Supporting documents

  supporting-documents

  References to supporting documents that have been uploaded with the application

  Required: True

  Datatype: object

  Expected number: 1 or more

  Supporting document component

  Reference

  reference

  A unique reference for the data item

  Required: True

  Datatype: string

  Expected number: 1

  Details

  details

  Additional details or information about an item

  Required: False

  Datatype: string

  Expected number: 1

• Pre development date pre-development-date:

  Date of pre-development biodiversity value calculation, must align with application or justified earlier date

  Required: True

  Datatype: datetime

  Expected number: 1

• Pre development biodiversity value pre-development-biodiversity-value:

  Calculated biodiversity value in Habitat Biodiversity Units

  Required: True

  Datatype: number

  Expected number: 1

• Earlier date reason earlier-date-reason:

  Reason for using a pre-development date that is earlier than the application submission

  Required: False

  Datatype: string

  Expected number: 1

• Habitat loss after 2020 habitat-loss-after-2020:

  Indicates whether there has been degradation of onsite habitat(s) after 30 Jan 2020

  Required: False

  Datatype: boolean

  Expected number: 1

• Habitat loss details habitat-loss-details:

  Details of habitat loss or degradation events

  Required: False

  Datatype: object

  Expected number: 1

  Habitat loss details component

  Loss date

  loss-date

  Date the activity causing habitat loss or degradation occurred

  Required: True

  Datatype: datetime

  Expected number: 1

  Pre loss biodiversity value

  pre-loss-biodiversity-value

  Biodiversity value immediately before habitat loss or degradation occurred, measured in Habitat Biodiversity Units

  Required: True

  Datatype: number

  Expected number: 1

  Supporting evidence

  supporting-evidence

  Description or reference to supporting documents for habitat loss or degradation evidence

  Required: False

  Datatype: string

  Expected number: 1

• Loss date loss-date:

  Date the activity causing habitat loss or degradation occurred

  Required: True

  Datatype: datetime

  Expected number: 1

• Pre loss biodiversity value pre-loss-biodiversity-value:

  Biodiversity value immediately before habitat loss or degradation occurred, measured in Habitat Biodiversity Units

  Required: True

  Datatype: number

  Expected number: 1

• Supporting evidence supporting-evidence:

  Description or reference to supporting documents for habitat loss or degradation evidence

  Required: False

  Datatype: string

  Expected number: 1

• Metric publication date metric-publication-date:

  Publication date of the biodiversity metric tool used for calculations

  Required: True

  Datatype: datetime

  Expected number: 1

• Irreplaceable habitats irreplaceable-habitats:

  Indicates whether the site contains any irreplaceable habitats

  Required: True

  Datatype: boolean

  Expected number: 1

• Irreplaceable habitats details irreplaceable-habitats-details:

  Description and references for any irreplaceable habitats identified on the site

  Required: False

  Datatype: string

  Expected number: 1

• Supporting documents supporting-documents:

  References to supporting documents that have been uploaded with the application

  Required: True

  Datatype: object

  Expected number: 1 or more

  Supporting document component

  Reference

  reference

  A unique reference for the data item

  Required: True

  Datatype: string

  Expected number: 1

  Details

  details

  Additional details or information about an item

  Required: False

  Datatype: string

  Expected number: 1

• Reference reference:

  A unique reference for the data item

  Required: True

  Datatype: string

  Expected number: 1

• Details details:

  Additional details or information about an item

  Required: False

  Datatype: string

  Expected number: 1

Rules

• application-type == 'hh' REQUIRES only bng-exempt field
• bng-condition-applies == false REQUIRES bng-condition-exemption-reasons.length >= 1
• bng-condition-applies == true REQUIRES bng-details
• application-type == 'hh' RECOMMENDS bng-exempt == false
• bng-condition-exemption-reasons[].exemption-type must be from bng-exemption-type codelist
• bng-details.pre-development-date <= application-submission-date OR earlier-date-reason provided
• bng-details.habitat-loss-after-2020 == true REQUIRES bng-details.habitat-loss-details
• bng-details.irreplaceable-habitats == true REQUIRES bng-details.irreplaceable-habitats-details