Helmrig Ltd
Based in Chorley, Lancashire · Covers North West England Accreditation stated by provider: Not detailed on site (PCA and other trade affiliations referenced)Own website
01 · Planning stage · BNG
Biodiversity net gain assessment in the North West
13 providers offering biodiversity net gain assessment in or across the North West, including national firms. An ecologist experienced with the statutory biodiversity metric.
Who needs oneMost applicants for new development in England, with some exemptions for small sites and householder applications
Who can do itAn ecologist experienced with the statutory biodiversity metric
WhenSurvey at the pre-application or application stage, metric calculation before submission
13 ecologists for the North West
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Based in or covering the North West (3)
Tyrer Ecological Consultants Ltd
Based in Formby, Merseyside · Covers North West and UK-wide Accreditation stated by provider: Not statedOwn websiteUK-wide
Veon Ecology Scotland
Based in Perth, Perthshire · Covers Scotland and Northern England Accreditation stated by provider: CIEEM Registered Practice (2025-2026)Own website
National providers (check they cover your area) (10)
ACP Consultants
Based in London · Covers UK-wide Accreditation stated by provider: CIEEMOwn websiteUK-wide
Arbtech Consulting Ltd
Based in Chester · Covers UK-wide (England and Wales) Accreditation stated by provider: Not statedOwn websiteUK-wide
Crossman Ecology
Based in Oakhill, Somerset · Covers South West and UK-wide Accreditation stated by provider: Not statedOwn websiteUK-wide
Ecus Ltd
Based in Sheffield, South Yorkshire · Covers Nationwide Accreditation stated by provider: Not statedOwn websiteUK-wide
Green Shoots Ecology
Based in Woodford Green, London · Covers Nationwide Accreditation stated by provider: Not statedOwn websiteUK-wide
Phlorum
Based in Brighton, East Sussex · Covers National team; air quality work focused on southern England Accreditation stated by provider: PCA accredited, ISO 9001, ISO 14001, ISO 45001, Expert Witness Institute member, Trustmark registered, River Restoration Centre memberOwn websiteUK-wide
Richard Green Ecology
Based in Woodbury Salterton, Devon · Covers South West England and nationwide Accreditation stated by provider: Not statedOwn websiteUK-wide
Sweco UK
Based in Leeds, West Yorkshire · Covers Nationwide Accreditation stated by provider: Not statedOwn websiteUK-wide
The Ecology Partnership
Based in Leatherhead, Surrey · Covers Surrey, the South East, and projects across England Accreditation stated by provider: CIEEM Registered Practice, BREEAM, SSIP Acclaim, CHASOwn websiteUK-wide
Thomson Environmental Consultants
Based in Guildford · Covers UK-wide Accreditation stated by provider: CIEEMOwn websiteUK-wide
Biodiversity net gain assessment in other regions
About biodiversity net gain assessment
Most planning permissions in England must now deliver a measurable 10% improvement in biodiversity compared with what was there before, known as biodiversity net gain. An ecologist surveys the site, runs it through the statutory metric, and sets out how the gain will be achieved and maintained for 30 years.
Getting signed off in England
In England, your council’s building control team or a registered building control approver checks the work. They issue a completion or final certificate once they have the reports they need, such as the as-built SAP, EPC, air test and any sound or ventilation test results.