Sustainability Consultants in the UK

Browse 153 verified sustainability consultants across the UK. Get quotes for BREEAM Assessment, Sustainability Statement, Overheating Assessment and more.

153 verified sustainability consultants across the UK on The Planning Review.

What does a sustainability consultant do?

A sustainability consultant ensures that a proposed development meets the energy performance, carbon reduction, and environmental standards required by both planning policy and Building Regulations. In the UK planning system, most local authorities require applicants to submit a sustainability statement and energy strategy demonstrating how the development addresses local plan policies on climate change, energy efficiency, and renewable energy. The consultant models the building's predicted energy use and carbon emissions, then recommends design measures to meet the relevant targets.

The scope of work depends on the development type and the local authority's requirements. For residential schemes, the consultant typically prepares SAP calculations for Part L compliance and, where required, an overheating assessment under Part O or CIBSE TM59. For commercial and public sector buildings, many LPAs require BREEAM certification to a specified rating. In London, the energy strategy must demonstrate a minimum 35% on-site carbon reduction over Part L 2021, following the energy hierarchy of be lean, be clean, be green.

The role has grown significantly as local authorities adopt carbon reduction targets that exceed national standards. Many now require whole-life carbon assessments for major applications, and net zero carbon policies are increasingly common in adopted local plans. Instructing a sustainability consultant early in the design process is important because passive design measures (such as building orientation, fabric performance, and natural ventilation) are far more cost-effective when incorporated before the layout is fixed.

When do you need a sustainability consultant?

  • The LPA requires a sustainability statement or energy strategy as a planning validation requirement
  • The development must achieve a specified BREEAM rating (commonly required for commercial, education, or public sector projects)
  • You are building new dwellings and need to demonstrate compliance with Part L 2021 (Conservation of Fuel and Power)
  • The local plan sets carbon reduction targets beyond Building Regulations (for example, the London Plan requires a minimum 35% on-site reduction over Part L 2021)
  • The scheme includes 10 or more dwellings or is over 1,000 sqm and an overheating assessment is required under Part O or CIBSE TM59
  • You are applying in a local authority area with a net zero carbon policy or carbon offsetting requirement
  • The LPA requires a whole-life carbon assessment for a major application
  • You are pursuing a voluntary certification such as Passivhaus, WELL, or Home Quality Mark

Services you can get local quotes for

  • BREEAM Assessment
  • Biodiversity Net Gain (BNG) Assessment
  • EPC / SAP Assessment
  • Energy Statement
  • Whole Life Carbon & Circular Economy

Frequently asked questions

How much does a sustainability statement cost?

Costs vary significantly depending on the scale and complexity of the development. For a straightforward residential scheme of up to 10 units, a sustainability statement typically costs between £1,500 and £3,000. For larger or more complex commercial or mixed-use developments, fees of £3,000 to £8,000 are common. A full BREEAM assessment (pre-assessment through to post-construction certification) will typically cost between £5,000 and £15,000 depending on the building size and target rating.

How long does the process take?

An energy strategy and sustainability statement for a standard residential development can usually be prepared within 2 to 4 weeks, provided the architectural drawings and specifications are available. BREEAM assessments run throughout the project lifecycle — the pre-assessment typically takes 2 to 3 weeks, but the final certification is only completed after construction. Overheating assessments generally require 2 to 3 weeks, though dynamic thermal modelling for complex schemes may take longer.

Do I need a sustainability consultant for a single house?

For a self-build or single dwelling, a sustainability consultant is not always required at planning stage unless the local authority has specific policy requirements. However, Part L compliance calculations (SAP assessments) are required for Building Regulations approval on all new dwellings, and if the property is in an area with overheating risk, a Part O assessment may also be needed. Many homeowners instruct a sustainability consultant where they want to achieve high performance standards or where the LPA has stringent local policies.

What is the difference between Part L compliance and an energy strategy?

Part L compliance is a statutory Building Regulations requirement demonstrating that the building meets minimum energy efficiency standards. An energy strategy is a broader planning document that goes beyond Part L, demonstrating how the development addresses the LPA's carbon reduction and energy policies — for example, showing the energy hierarchy approach and the contribution of renewable technologies. Many local authorities require both.

Is BREEAM mandatory?

BREEAM is not a statutory requirement in England, but many local authorities require certain types of development (particularly commercial, educational, and public sector buildings) to achieve a specified BREEAM rating through local plan policies. Some public sector clients and funding bodies also mandate BREEAM as a project requirement. Where it is a planning condition, evidence of certification must be submitted before the relevant condition can be discharged.

Legal and regulatory framework

  • Building Regulations Approved Document Part L (2021) — Conservation of Fuel and Power. Sets minimum energy efficiency and carbon emission standards for new buildings and refurbishments.
  • Building Regulations Approved Document Part O (2022) — Overheating. Applies to new residential buildings in England, requiring demonstration that overheating risk is adequately mitigated.
  • National Planning Policy Framework (NPPF)
  • The London Plan (2021) — Policies SI 2, SI 3, and SI 4 set specific carbon reduction, overheating, and whole-life carbon requirements for developments in Greater London.
  • Environment Act 2021
  • CIBSE TM59
  • Local plan sustainability policies

Professional accreditations

  • Engineering Council
  • Royal Institution of Chartered Surveyors
  • Society for the Environment
  • The Institute of Sustainability and Environmental Professionals

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