Darren Evans

What Darren Evans does

Darren Evans Assessments Limited is a privately held UK sustainability consultancy, founded in 2006 and headquartered at Bristol & Bath Science Park, that provides whole life carbon assessment, net zero carbon strategy, BREEAM consultancy, SAP and SBEM calculations, bespoke thermal bridging (Psi value) analysis, air permeability testing, sound insulation testing and CPD training to the built environment sector. The firm's underlying technology stack comprises building performance simulation and modelling tools — Standard Assessment Procedure (SAP), Simplified Building Energy Model (SBEM), dynamic simulation modelling (DSM) for non-standard buildings, and whole life carbon methodologies aligned to RICS, London Plan and LETI standards — with proprietary differentiation in bespoke thermal bridging calculations and a collaborative approach to whole life carbon assessment that prioritises accuracy over convenient low results.

The business operates a sales-led, fee-for-service professional services model. Pricing is quotation-based and project-specific, with no public rate card, payment terms of either prepayment or net 30 days, and interim invoicing for projects over two months. Revenue is generated through direct consultancy engagement with enterprise clients, supported by content-led demand generation including a monthly podcast ('Thrive in Construction'), a blog archive running from 2017 to 2025, free whitepapers, CPD training, and interactive self-assessment tools. Customers are UK-based housebuilders, contractors, developers, housing associations, architects, M&E consultants, and defence/public sector clients, with named enterprise relationships including Barratt Developments, Bouygues UK, Rollalong Offsite Construction, the Ministry of Defence, Vistry Partnerships, Symons Construction, Hill, Engie and Regal M&E Services. The firm is B Corp certified, affiliated with CIBSE, UKGBC, BRE Group, BSI Group and cbuilde, and operates from Bristol and Chipping Sodbury, serving only the United Kingdom market.

Name

Darren Evans

Legal name

Darren Evans Assessments Limited

Website

https://darren-evans.co.uk

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

11–50 employees

Short description

Darren Evans Assessments Limited is a UK-based sustainability consultancy, founded in 2006, that provides whole life carbon assessment, BREEAM consultancy, SAP/SBEM calculations, thermal bridging analysis, and net zero advisory services to housebuilders, contractors, and public sector clients across England.

Ownership category

akta.pro rank

Product category

Building Sustainability Consultancy

NAICS

Environmental Consulting Services (54162), Other Scientific and Technical Consulting Services (54169), Testing Laboratories and Services (54138)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Sustainable/Green Building & LEED Consulting (BPAHAKAG)

akta.pro secondary industries

Decarbonization Strategy & Marginal Abatement Cost Curve (MACC) Advisory (EUABAKAC), Net-Zero Assurance & Readiness Assessments (limited assurance prep, audit support) (EUABAKAJ), Emissions Factors, LCA & Product Carbon Footprint (PCF) Platforms (EUABAEAD)

Keywords

• Whole life carbon assessment
• BREEAM sustainability consultancy
• Net zero construction consulting
• Building performance simulation
• Energy compliance assessment

Headquarters

HQ city

Bristol

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Consultancy Services: Fee-for-service consultancy engagements covering whole life carbon assessment, BREEAM assessment, SAP/SBEM calculations, air testing, sound testing, thermal bridging analysis, and net zero strategy. Pricing is quotation-based with project-specific fees. Payment terms are either full payment prior to commencement or net 30 days from invoice. Interim payments may be claimed for projects exceeding two months. Additional services beyond the agreed scope are charged separately at prevailing rates.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels8 records

Core offering

Darren Evans is a UK sustainability consultancy delivering whole life carbon assessments, BREEAM assessments, SAP/SBEM energy calculations, thermal bridging analysis, and air/sound testing for construction industry clients. The firm provides net zero strategy and value engineering consultancy to housebuilders, contractors, developers, housing associations, and defence/public sector clients. Services are delivered on a project-by-project, fee-for-service basis with quotation-based pricing.

Product overview

Darren Evans is a sustainability consultancy firm offering a comprehensive portfolio of assessment and advisory services for the built environment. Their core offerings include Whole Life Carbon Assessment services, Net Zero in Construction Consultancy, BREEAM Assessments, SAP/SBEM Calculations for building regulations compliance, Thermal Bridging Assessments with bespoke Psi values, and Air/Sound Testing Services. They provide CPD training programs and publish thought leadership content through their Thrive in Construction podcast and whitepapers. The firm specializes in helping developers, housing associations, contractors, and designers achieve sustainability targets, with notable case studies including the Zed House net zero home concept, Wornington Green Estate regeneration, and modular construction projects for the Ministry of Defence.

Differentiator

Problem solved

Functional benefit

Brands

• Zed House: A concept home developed with Barratt Developments showcasing operational net zero carbon homes. Not a product brand of Darren Evans but a project they consulted on.

Products and services

• Whole Life Carbon Assessment Comprehensive assessment evaluating a building's total emissions across its entire lifecycle, from raw material extraction and construction through operational energy use to end-of-life and potential reuse. Serves developers, contractors, and housing associations seeking accurate carbon measurement.
• Net Zero in Construction Consultancy Consultancy services helping clients achieve net zero carbon targets through fabric-first strategies, value engineering, and carbon pathway modelling. Targets housebuilders and developers preparing for Future Homes Standard and net zero commitments.
• BREEAM Assessments Sustainability assessment method covering design, construction, and operation across nine categories including management, health and wellbeing, energy, transport, water, materials, waste, land use and ecology, and pollution. Delivers ratings such as BREEAM Excellent for clients requiring certification.
• SAP Calculations Standard Assessment Procedure calculations for residential dwellings to demonstrate compliance with Part L of Building Regulations and determine energy performance. Required for new-build housing and conversions.
• SBEM Calculations Simplified Building Energy Model calculations for non-domestic buildings to assess energy performance and compliance with building regulations. Used for commercial, public, and mixed-use developments.
• Thermal Bridging Assessment Bespoke Psi value calculations for building junctions to quantify and reduce heat loss, providing 3-5% carbon savings compared to generic Accredited Construction Details. Supports fabric-first design optimisation for residential and commercial developments.
• Air Testing Services Air permeability testing services ensuring compliance with Part L building regulations, including ATTMA compliance certificates and failure investigation. Site-based testing conducted by qualified engineers with minimum 7 working days notice required for booking.
• Sound Testing Services Sound insulation testing services in accordance with BS EN ISO 16283-1:2014+A1:2017 and BS EN ISO 717:2013 for Part E Building Regulations compliance. Tests separating walls and floors between dwellings.
• Z-House Consultancy Low carbon housing consultancy concept showcasing net zero carbon home specifications and sustainable house building approaches, demonstrated through the Zed House project with Barratt Developments which achieved 125% reduction in regulated carbon emissions.
• CPD Training Continuing Professional Development training sessions including on-demand and on-request options covering net zero carbon, Part L 2021, and Future Homes Standards. Sessions hosted by senior consultants for 4-20 attendees.

Quantifiable outcome

• 100%+ reduction in regulated carbon emissions against Part L 2013 achieved for Barratt Developments' Zed House
• +4 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• CIBSE (Chartered Institution of Building Services Engineers)coreStrategic or Co-development PartnerAffiliation with CIBSE as a leader in sustainability. CIBSE is the professional body for building services engineers. The affiliation signals technical credibility and access to industry standards and networks relevant to energy performance and net zero construction.
• UKGBC (UK Green Building Council)coreStrategic or Co-development PartnerAffiliation with the UKGBC as a leader in sustainability. UKGBC is a membership organisation driving sustainable built environment change. The affiliation positions Darren Evans within the green building movement and provides access to policy discussions and industry best practices.
• BRE GroupcoreStrategic or Co-development PartnerAffiliation with the BRE Group, creator of BREEAM — one of the world's most recognised sustainability assessment methods. As a BREEAM consultancy, this affiliation is commercially and technically significant, reflecting deep engagement with the assessment framework's parent organisation.
• BSI GroupcoreStrategic or Co-development PartnerAffiliation with BSI Group (British Standards Institution), provider of standards, certification, and testing services. Relevant to Darren Evans' work on building regulations compliance, testing standards (ATTMA for air testing, SITMA for sound testing), and quality assurance.
• cbuildeminorStrategic or Co-development PartnerAffiliation with cbuilde, a sustainability-focused industry platform or network. The nature of the affiliation is not fully detailed but appears in the company's list of industry leadership affiliations.
• Bouygues UKcoreStrategic or Co-development PartnerCollaborative partnership to produce the 'Whole Life Carbon in Construction' whitepaper. Bouygues UK engaged Darren Evans on the Wornington Green Estate project — a major 230-home regeneration in North Kensington — to collaboratively develop and review whole life carbon assessments. The relationship is described as a learning partnership with mutual knowledge development, not a standard client-consultant transaction.
• University of SalfordminorStrategic or Co-development PartnerAcademic partner for the Zed House project. A researcher from the University of Salford lived in the Zed House for a year to conduct in-use monitoring and post-occupancy evaluation, measuring energy use live for visitors to see.
• 40+ organisations (Zed House ecosystem)minorStrategic or Co-development PartnerFor the Zed House project, Barratt Developments worked with more than 40 organisations from across the housebuilding, sustainability, and technology sectors. Darren Evans was one of these partners providing energy modelling and SAP calculation services within this collaborative ecosystem.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Hoare Lea: UK M&E and sustainability engineering consultancy offering BREEAM, energy modelling and net zero services to real estate and construction clients. Overlaps with Darren Evans on carbon and building performance work within a much wider engineering portfolio.
• WSP Built Environment Sustainability: Global professional services firm with a sizeable UK sustainability, BREEAM and carbon advisory practice serving developers and contractors. Competes for larger and panel-driven mandates where Darren Evans may also bid.
• Currie & Brown: International construction and cost consultancy offering whole life carbon and sustainability advisory to clients including housebuilders and contractors. Broader than Darren Evans but competes for the same advisory scope.
• Buro Happold: Large global engineering consultancy with a strong sustainability, BREEAM and net zero practice serving developers and government. Larger, broader portfolio but directly competes for the same sustainability advisory mandates.
• AECOM Sustainability Services: Global infrastructure consultancy with extensive UK sustainability, embodied carbon and BREEAM delivery. A broad incumbent that often undercuts specialists on panel work.

Direct peers

• Carbon Trust: Specialist carbon and energy consultancy helping organisations measure, reduce and certify carbon performance. Provides carbon footprinting, net zero strategy and built-environment services overlapping Darren Evans' BREEAM and whole life carbon work.
• Elementa Consulting: Sustainability and net zero consultancy supporting built environment clients with whole life carbon, BREEAM, energy strategy and ESG advisory. Closely comparable in scope, customer base and growth stage.
• Verco: UK-based carbon and energy consultancy for the built environment offering whole life carbon assessment, embodied carbon, and net zero strategy. Directly comparable to Darren Evans' core services and client base of developers and contractors.
• Etude Group: UK sustainability and energy consultancy delivering BREEAM, SAP, SBEM, thermal modelling and net zero consultancy to housebuilders and developers. Closely comparable specialist boutique offering in the same regulatory niche.
• Energy & Carbon Consultants Ltd (EAC): UK consultancy providing SAP, SBEM, BREEAM, thermal bridging and carbon assessment services to the construction sector. Comparable in service mix and client type to Darren Evans.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCTrzqei7gttB8WB5wM6hUpw?view_as=subscriber
• LinkedInlinkedin.com/company/darren-evans-limited/mycompany

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

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 Darren Evans