What Stephenson Halliday does

Stephenson Halliday is a UK-based B2B professional consultancy delivering planning, landscape architecture, environmental impact assessment (EIA), and graphics/visualisation services to public and private sector clients. The firm operates four integrated service lines (Planning, Landscape, EIA, Graphics) deployed across six sector specialisms: Energy, Infrastructure, Minerals and Waste, Built Development, Rural and Tourism, and Public Sector. Projects span the full lifecycle from site search and feasibility through planning applications, public inquiries, and Development Consent Order examinations to long-term landscape management (e.g., 30-year management plans on East West Rail). The firm is a wholly-owned subsidiary of RSK Group, having been acquired and subsequently merged with RSK Landscape, and maintains a multi-office UK footprint (Kendal, Hemel Hempstead, Wetherby, Scotland) supporting national coverage of England, Scotland, Wales and Northern Ireland.

The technical stack is built on industry-standard tools rather than proprietary platforms: Adobe Creative Cloud, SketchUp and 3DS Max for visualisation and photomontage; ArcGIS, QGIS and bespoke constraints-sieving for spatial analysis; AutoCAD, Keyscape and LSS for CAD and BIM-compliant landscape design. Differentiated offerings include pioneering 'Stage Zero' nature-based river restoration methodology, industry-leading photomontage and LVIA practice that has informed more than 200 wind energy projects, and bespoke GIS-based site search services. The workforce is materially credentialed, with 20 Chartered Members of the Landscape Institute and 9 Chartered Members of the Royal Town Planning Institute.

The business operates a fee-for-service professional consultancy model, with revenue generated through project-based engagements secured via competitive tenders, direct sector-director relationships, and repeat client work. Pricing is project-specific and not publicly disclosed. The firm holds ISO 9001 certification, ISEP EIA Quality Mark Scheme membership, and Landscape Institute Registered Practice status, and is a member of the RSK corporate responsibility and sustainability programme. There is no public funding, no external investor exposure, and no disclosed revenue or headcount figures.

Name

Stephenson Halliday

Legal name

Stephenson Halliday

Website

https://stephenson-halliday.com

Company type

Private

Founded year

2001

Operating status

Operating

Headcount range

11–50 employees

Short description

Stephenson Halliday is a UK-based B2B consultancy providing planning, landscape architecture, environmental impact assessment, and graphics/visualisation services to public and private sector clients across energy, infrastructure, minerals and waste, built development, rural, and public sectors, operating as a subsidiary of RSK Group.

Ownership category

akta.pro rank

Headquarters

HQ city

England

HQ country

Germany

HQ region

Europe

Offices4 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 Consulting Services: Fee-for-service professional consultancy model providing planning, landscape architecture, EIA, and graphics services to public and private sector clients. Revenue generated through project-based engagements ranging from feasibility studies through to full planning applications, appeals, and post-consent implementation. Services delivered across energy, infrastructure, minerals and waste, built development, and public sector segments.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Stephenson Halliday is a UK-based professional consultancy providing planning, landscape architecture, environmental impact assessment (EIA), and graphics/visualisation services. It delivers end-to-end project support from site identification and feasibility through planning applications, appeals, public inquiries, implementation and long-term landscape management, across energy, infrastructure, minerals and waste, built development, rural and tourism, and public sector clients.

Product overview

Stephenson Halliday is a UK-based planning, EIA, and landscape consultancy offering four integrated core service lines: Planning, Landscape, Environmental Impact Assessment (EIA), and Graphics/Visualisation. These services are delivered across six sector specialisms: Built Development, Energy, Infrastructure, Minerals and Waste, Public Sector, and Rural and Tourism. The company operates as part of the RSK Group and provides end-to-end consultancy from site selection and feasibility through to planning consent, project implementation, and landscape management. The service architecture is organized as a unified consultancy offering rather than a modular software product, with specialists collaborating across disciplines to deliver nature-based, sustainable solutions for clients.

Differentiator

Problem solved

Functional benefit

Products and services

• Planning Services Comprehensive planning consultancy covering the entire project lifecycle from inception to consent, including site identification, planning applications, stakeholder engagement, appeals, and post-consent implementation support for clients across energy, infrastructure, minerals and waste, built development, rural and tourism, and public sector.
• Landscape Services Full-spectrum landscape architecture including strategic landscape planning, landscape and visual impact assessments (LVIA), landscape design and management, site restoration, and landscape research services.
• Environmental Impact Assessment (EIA) Services Expert support through the EIA process including screening, scoping, appraisals, and constraint-led project design to help clients secure planning approvals through proportionate solutions.
• Graphics and Visualisation Services Visualisation and graphics specialist services including photomontage production, 3D modelling and animations, graphic design, GIS-based analysis, and CAD for project visualisation and planning requirements. Has informed the development of more than 200 wind energy projects across the UK.

Quantifiable outcome

• Over 200 wind energy projects informed by visualisation services
• +4 more outcomes

Named customers21 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• RSK GroupcoreStrategic or Co-development PartnerStephenson Halliday is a subsidiary of RSK Group Limited, a leading integrated environmental, engineering and technical services business. The merger has enabled the company to draw on experience and knowledge from other RSK businesses, providing bespoke end-to-end solutions. The merger with RSK Landscape has expanded the planning and landscape service offering, enabling broader knowledge access and more efficient delivery.

Scale indicators4 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Enzygo: UK environmental, planning and sustainability consultancy offering EIA, landscape and planning services to energy, minerals and development sectors - directly comparable SME peer.
• SLR Consulting: International environmental and advisory consultancy with strong UK planning, EIA and landscape practice serving energy, infrastructure, mining and built development clients - directly overlaps Stephenson Halliday's core service lines and sector mix.
• CSA Environmental: Specialist UK environmental and planning consultancy delivering EIA, LVIA and landscape services for energy, infrastructure and development clients - similar SME scale and sector focus to Stephenson Halliday.
• Wardell Armstrong: UK environmental, planning and engineering consultancy with a particularly strong minerals, waste and infrastructure practice - closely comparable to Stephenson Halliday on minerals/waste sector exposure and EIA delivery model.
• Land Use Consultants (LUC): UK-based consultancy combining landscape architecture, environmental planning, EIA and masterplanning across energy, infrastructure, and development sectors - the closest like-for-like comparable to Stephenson Halliday, similar size and client base.

Broad incumbents

• Royal HaskoningDHV: International engineering and environmental consultancy with UK planning, EIA and landscape capability serving energy, water, infrastructure and built development clients - comparable services from a larger platform.
• WYG (now Tetra Tech): Was a UK planning, environment and development consultancy serving built development, energy and infrastructure sectors; acquired by Tetra Tech in 2021 - comparable planning/EIA capability now within a global major.
• AECOM Environment & Planning: Major global consultancy delivering EIA, environmental planning and landscape architecture services across the same sectors as Stephenson Halliday, including UK renewables and infrastructure.
• WSP Environment & Planning: Global consultancy with a substantial UK environmental planning, EIA and landscape practice serving energy, infrastructure and built development - broader portfolio but overlapping Stephenson Halliday's core offerings.
• Barton Willmore (now Stantec): Was a leading UK planning, design and development consultancy before acquisition by Stantec in 2022; offers directly comparable town planning, landscape and EIA services across built development and energy - now part of a global major.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/EnvPlanners
• LinkedInlinkedin.com/company/stephenson-halliday

Revenue estimate

Valuation estimate

Number of profiles

Profiles22 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 Stephenson Halliday