ESOS Phase 4 Lead Assessor
Accredited Lead Assessor services for the Energy Savings Opportunity Scheme Phase 4 (deadline 5 December 2027).
For companies & operators
Compliance, energy and carbon services for companies
We work with operating companies and multi-site estates on compliance, energy and carbon — from ESOS and SECR through to full GHG Protocol footprints and credible Net Zero transition pathways.
Company services
Choose a service to learn more, or get in touch and we'll scope the right package for your organisation.
SECR Carbon Reporting
Streamlined Energy and Carbon Reporting for company accounts — energy, emissions and intensity metrics.
GHG Protocol Carbon Footprint
Scope 1, 2 and 3 carbon footprints under the GHG Protocol with market- and location-based reporting.
Energy Audits
Investment-grade audits with 15-year NPV appraisal and prioritised technology recommendations.
NZC Strategy & Transition Pathway
Credible Net Zero Carbon strategy, baselining and decarbonisation roadmap for your organisation.
Decarbonisation Reports
Public sector decarbonisation reports supporting PSDS bids and estate-wide capital planning.
Trusted technical advice across major UK property portfolios
NZC Consultants supports landlords, investors and operating companies with audit-ready energy, carbon and compliance advice across large and complex UK estates.
0+
Buildings assessed
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Sq m reviewed
£0.0bn+
Property asset value supported
UK-wide
Commercial property experience
Figures reflect cumulative non-domestic property supported, reviewed and assessed by the NZC team across UK commercial portfolios.
Reference library
Related official guidance
Reference links to the standards, regulations and governing bodies that underpin this service.
ESOS
ESOS — guidance for participants
Environment Agency
Lead Assessor guidance on undertaking and notifying ESOS energy audits, including significant energy consumption and de minimis rules.
View official guidanceESOS
ESOS — overview and qualification
GOV.UK
Statutory overview of ESOS qualification criteria, compliance routes (ISO 50001, DECs, EPCs, audits) and reporting obligations.
View official guidanceESOS
MESOS portal — notification system
Environment Agency
Online notification system used by ESOS Lead Assessors and responsible undertakings to submit compliance and action plan reports.
View official guidanceESOS
ESOS Phase 4 updates
Environment Agency / DESNZ
Latest updates on Phase 4 qualification dates, audit requirements and action plan reporting for the 2027 compliance cycle.
View official guidanceSECR
SECR — environmental reporting guidelines
DESNZ / DEFRA
Statutory Streamlined Energy and Carbon Reporting guidance for quoted, large unquoted and LLP entities under the Companies Act.
View official guidanceSECR
Companies Act 2006 — strategic and directors' reports
GOV.UK
Underlying statutory reporting requirements that SECR sits within, including directors' report disclosures on energy and emissions.
View official guidanceSECR
GHG Protocol — Corporate Standard
WRI / WBCSD
Global accounting and reporting standard for corporate greenhouse gas inventories, the basis for Scope 1, 2 and 3 reporting.
View official guidanceSECR
UK Government GHG conversion factors
DESNZ / DEFRA
Annual UK conversion factors used for SECR, ESOS, GHG Protocol and SBTi inventories, covering fuels, electricity, transport and refrigerants.
View official guidanceSECR
GHG Protocol — Scope 2 and Scope 3 guidance
WRI / WBCSD
Detailed guidance on location-based and market-based Scope 2 accounting and value chain Scope 3 categories.
View official guidanceESG
GRESB Real Estate Assessment
GRESB
Global ESG benchmark for real estate portfolios used by institutional investors to compare fund-level sustainability performance.
View official guidanceESG
TCFD — climate-related financial disclosures
Task Force on Climate-related Financial Disclosures
Disclosure recommendations on governance, strategy, risk management and metrics & targets for climate-related risks.
View official guidanceESG
ISSB — IFRS S1 and IFRS S2
International Sustainability Standards Board
Global baseline sustainability and climate disclosure standards used as the foundation for UK Sustainability Disclosure Standards.
View official guidanceESG
Science Based Targets initiative (SBTi)
SBTi
Validation framework for corporate near-term and net zero targets aligned with the Paris Agreement.
View official guidanceESG
FCA Sustainability Disclosure Requirements (SDR)
Financial Conduct Authority
UK SDR and investment labels regime governing sustainability claims and disclosures by FCA-regulated firms.
View official guidanceESG
UK Green Taxonomy — consultation and updates
HM Treasury / DESNZ
Developing UK classification framework for environmentally sustainable economic activities, relevant to fund and corporate disclosure.
View official guidance
Discuss your compliance and carbon needs
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