What AES Sustainability Consultants does

AES Sustainability Consultants is a UK-based sustainability consultancy founded in 2005 and headquartered in Tiverton, Devon, operating through a group of three related legal entities (AES Sustainability Limited, AES Sustainability Consultants Limited, and AES Compliance & Testing Limited). The firm delivers end-to-end sustainability services for the construction and housebuilding industries, spanning energy performance assessment (SAP, SBEM, HEM, EPCs), compliance testing (air tightness, sound insulation, ventilation commissioning), sustainability certification (BREEAM, Home Quality Mark, Passivhaus), and PAS 2035 retrofit coordination. The company claims to work with most of the top 25 UK housebuilders and has delivered landmark projects including the world's first HQM-certified development at Lancaster Grange and two BREEAM award-winning schemes.

The firm's technology footprint centres on two proprietary digital platforms — AES Hub, a cross-device project information transfer system that replaces email-based compliance documentation exchange, and AES SiteView, an on-site photographic evidence app with geo-tagging and validation features for Part L compliance. These are layered on top of industry-standard methodologies and accreditations from 14+ bodies including ATTMA, Elmhurst, ECMK, SITMA, Trustmark, BREEAM, and HQM, which collectively provide the regulated access required to deliver UK building compliance services.

AES generates revenue exclusively through professional services fees quoted on a project-by-project basis, targeting four customer segments: UK housebuilders and developers (primary), social housing providers and housing associations (primary), local authorities and public sector, and commercial/non-domestic developers. Distribution is direct enterprise engagement with no intermediary resellers, and the firm covers England, Scotland, and Wales through in-house accredited engineers. The McBains partnership extends the firm's reach into retrofit and decarbonisation programmes for social landlords, while strategic alliances with BRE and government-endorsed schemes such as Trustmark and Constructionline provide regulatory pre-qualification for public sector work.

Name

AES Sustainability Consultants

Legal name

AES Sustainability Consultants Limited

Website

https://aessc.co.uk

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

51–100 employees

Short description

AES Sustainability Consultants is a UK-based sustainability consultancy founded in 2005 that delivers energy performance assessments, compliance testing, BREEAM/HQM certification, and PAS 2035 retrofit services primarily to top 25 UK housebuilders, social housing providers, and public sector clients across England, Scotland, and Wales.

Ownership category

akta.pro rank

Product category

Sustainability and Energy Consulting Services

NAICS

Environmental Consulting Services (541620), Testing Laboratories and Services (54138), Engineering Services (541330)

SIC

Services-Engineering Services (8711), Services-Testing Laboratories (8734)

akta.pro primary industry

Sustainability, ESG & Climate Risk Advisory (BPAHAJAH)

akta.pro secondary industries

Environmental Compliance & Permitting (BPAHAJAA), Product Sustainability & LCA/EPD (Eco-design, PCF) (EUAHAJAF)

Keywords

• Sustainability consulting services
• BREEAM assessment
• Building energy performance
• Retrofit coordination
• Air tightness testing

Headquarters

HQ city

Tiverton

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Sustainability Consultancy Services: AES generates revenue through providing expert sustainability consulting services to the construction and housebuilding industries, including BREEAM/HQM assessments, SAP calculations, SBEM calculations, Part L compliance, overheating assessments, air tightness testing, sound insulation testing, ventilation commissioning, water efficiency calculations, U-value and PSI value calculations, whole life carbon assessments, and PAS 2035 retrofit services. Services are delivered across new build and existing buildings for domestic and non-domestic projects.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

AES Sustainability Consultants provides end-to-end sustainability consultancy and on-site compliance testing for the UK construction and housebuilding industries, delivering BREEAM and Home Quality Mark assessments, SAP/SBEM energy calculations, EPCs, air tightness and sound insulation testing, overheating analysis, PAS 2035 retrofit coordination, and whole life carbon assessments for both new build and existing buildings. These services are supported by two proprietary digital platforms — AES Hub (a project information management platform) and AES SiteView (a geo-tagged photographic evidence mobile app) — that streamline compliance documentation and information transfer across project teams.

Product overview

AES Sustainability Consultants operates as a multi-award winning consultancy offering sustainability guidance for new and existing buildings. The company provides two primary digital platforms: AES Hub (a digital platform enabling seamless information transfer across devices) and AES SiteView (an on-site photographic evidence app). Alongside these technology products, the company offers an extensive portfolio of consulting services including energy assessments (SAP, SBEM, HEM, EPCs), compliance testing (air tightness, sound insulation, ventilation commissioning), sustainability certifications (BREEAM, Home Quality Mark, Passivhaus), and specialist services (overheating assessments, decarbonisation, whole life carbon, retrofit coordination per PAS 2035). The digital products and consulting services work together to provide end-to-end support for building projects from design through post-construction compliance.

Differentiator

Problem solved

Functional benefit

Brands

• AES Hub: A digital platform that streamlines the building industry by enabling seamless information transfer across devices, eliminating emails, lost data, and delays.
• AES SiteView

Products and services

• AES Hub
• AES SiteView
• BREEAM & Home Quality Mark (HQM) Assessment Services
• SAP Calculations Standard Assessment Procedure (SAP) calculations for achieving project requirements and enhancing energy efficiency in residential buildings, supporting Part L compliance.
• SBEM Calculations Simplified Building Energy Model (SBEM) calculations for non-domestic buildings to enhance energy efficiency and achieve Part L2 compliance.
• Energy Performance Certificates (EPCs) Energy Performance Certificates demonstrating building energy performance for both domestic and non-domestic properties, supporting MEES compliance and funding applications.
• Air Tightness Testing UK-wide on-site air tightness testing services delivered by ATTMA-accredited engineers to achieve compliance with building regulations across England, Scotland, and Wales.
• Sound Insulation Testing Testing services for party walls and floors ensuring Part E Building Regulations compliance, delivered by SITMA-accredited engineers across the UK.
• PAS 2035 Retrofit Services Comprehensive PAS 2035-compliant retrofit services for social landlords, including Retrofit Assessments, Retrofit Coordination, Portfolio Analysis and Archetyping, and turn-key WH:SHF/SHDF funding solutions, covering the full retrofit journey from bid to post-monitoring.
• Overheating Risk Assessments Overheating risk assessments using TM52/CIBSE TM59 methodology to ensure energy-efficient, Part O-compliant buildings, particularly for dense urban developments.
• Whole Life Carbon Assessments Assessments evaluating the carbon impacts over the entire life cycle of a built asset, from raw materials through construction, in-use, and end of life.
• Decarbonisation Services Services ensuring compliance and demonstrating effective decarbonisation through sustainable design, retrofit improvements, and portfolio-level strategy for new and existing buildings.
• Passivhaus Certification Services Services for attaining energy-efficient, sustainable buildings through Passivhaus standard certification, including for large-scale residential schemes (e.g., Barratt Bollo Lane, 455 homes).
• Domestic Ventilation Commissioning Commissioning services ensuring optimal airflow and compliance with domestic ventilation standards per Approved Document F, delivered under the ATTMA Ventilation Commission Scheme.
• Water Efficiency Calculations Calculations evaluating potable water consumption in new dwellings for Part G Building Regulations compliance.
• London Plan Compliance Services Expert support ensuring developments within Greater London meet the London Plan's energy, sustainability, and carbon requirements, including GLA planning conditions.
• Home Energy Model (HEM) and Future Homes Standard (FHS) Services Services applying the UK Government's Home Energy Model (HEM) and supporting clients with the Future Homes Standard (FHS) for assessing energy performance and carbon impact of new residential buildings.
• Existing Buildings Services Compliance and performance optimisation services for existing domestic and non-domestic buildings, including energy performance, retrofit planning, and decarbonisation strategy.

Quantifiable outcome

• 151 tonnes of CO2 per year saved for ISHA Consortium across 300+ properties
• +18 more outcomes

Named customers20 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• McBainscoreStrategic or Co-development PartnerAES and McBains (property and construction consultancy) have formed a strategic partnership to deliver retrofit and decarbonisation services. Together they produced a net zero carbon investment plan for Cambridge Housing Society and were jointly appointed for the ISHA Consortium WH:SHF project, with AES providing sustainability expertise and McBains providing broader property and construction consultancy services.
• Arann InsulationminorImplementation/ SI/ Consulting PartnerAES collaborated with Arann Insulation as the primary contractor for delivering retrofit measures across 118 homes for Cambridge Housing Society. AES provided on-site coordination, quality assurance, and PAS 2035 compliance oversight while Arann Insulation executed the physical retrofit works including external wall insulation and cavity wall insulation installation.
• ATTMA (Air Tightness Testing and Measurement Association)coreOthersAES is accredited by ATTMA, the Air Tightness Testing and Measurement Association, which sets standards for air tightness testing. AES Compliance & Testing is accredited under ATTMA's Ventilation Commission Scheme for independent commissioning of domestic ventilation systems.
• Elmhurst EnergycoreOthersAES is accredited by Elmhurst Energy, a leading certification body for energy assessors in the UK. Elmhurst accreditation supports AES's delivery of SAP, EPC, and RdSAP assessments across domestic properties.
• ECMK / PAS HubcoreOthersAES is accredited by ECMK/PAS Hub, supporting the company's delivery of PAS 2035-compliant retrofit assessments, coordination, and design services for social housing retrofit programmes.
• SITMA (Sound Insulation Testing and Measurement Association)coreOthersAES is accredited with the SITMA competency scheme for sound insulation testing, ensuring the highest standards of acoustic compliance testing for Part E Building Regulations compliance.
• BRE (Building Research Establishment)coreStrategic or Co-development PartnerAES works closely with BRE on pioneering projects including the UK's first HQM-certified development at Lancaster Grange, where AES provided feedback to BRE on the application of the HQM standard. BRE's stretching sustainability requirements were delivered through AES's expert guidance.
• TrustmarkminorOthersAES is associated with Trustmark, a government-endorsed quality assurance scheme, as part of their retrofit coordination and compliance services requiring lodgment to Trustmark for regulatory compliance.
• ConstructionlineminorOthersAES is registered with Constructionline, a UK government certification scheme for construction suppliers, enabling the company to be pre-qualified for public sector procurement.
• SMAS WorkSafeminorOthersAES is associated with SMAS WorkSafe, a health and safety assessment scheme commonly required for construction and consultancy engagements in the UK.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Sweco UK: European engineering consultancy with growing UK presence in building sustainability, energy, and decarbonisation. Competes with AES on BREEAM, energy assessments, and retrofit advisory, though from a broader engineering and infrastructure base.
• Arup: Global engineering and sustainability consultancy with significant UK building performance and decarbonisation capability. Comparable to AES on BREEAM, Passivhaus, whole life carbon, and net zero advisory for major UK developers and public sector clients.
• WSP: Global engineering professional services firm with a substantial UK building sustainability and energy performance practice. Overlaps with AES on BREEAM advisory, SAP/EPC, retrofit, and Part L compliance work for major developers, but operates across a much wider service portfolio.
• Buro Happold: International engineering consultancy with established UK building performance and sustainability services. Competes with AES in BREEAM advisory, energy and sustainability strategy, and Part L compliance for high-profile UK building projects.
• Mott MacDonald: International engineering, management, and development consultancy with a UK building sustainability practice. Overlaps with AES in BREEAM assessments, energy modelling, and retrofit advisory for residential and non-domestic developments.
• AECOM: Global infrastructure consulting firm with UK building sustainability and environmental services. Competes with AES on BREEAM, energy assessments, and decarbonisation work for major housebuilders and social housing clients, with substantially larger resources and multi-disciplinary capabilities.
• Stantec (including Hydrock): Global engineering consultancy that acquired Hydrock in 2024, a UK building performance and sustainability consultancy. Directly comparable to AES in delivering BREEAM, sustainability, and building performance services for UK developers, but at materially greater scale and as part of a broader engineering portfolio.

Direct peers

• Verco: UK sustainability and carbon consultancy offering whole life carbon, BREEAM, and energy performance services to developers and building owners. Directly comparable niche peer to AES in building-focused sustainability consulting.
• Elementa Consulting: UK building services engineering and sustainability consultancy delivering BREEAM, Passivhaus, energy assessments, and retrofit services. Closely comparable to AES in size, service mix, and target customer segments (UK developers, social housing).

Emerging players

• Carbon Trust: UK-based sustainability advisory organisation helping organisations measure and reduce carbon emissions. Comparable to AES on whole life carbon, decarbonisation strategy, and ESG advisory, with a stronger brand in climate advisory but a less building-specific focus.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/aes-sustainability-consultants
• Xx.com/AES_Consultancy

Compliance14 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about AES Sustainability Consultants