What Castons does

Castons is a UK-based multi-disciplinary construction consultancy founded in 1895 in Ipswich, operating as a wholly-owned subsidiary of the international Artelia Group and structured as a 100% employee-owned business. The firm delivers project and cost management, engineering and consulting, asset and facilities management, management contracting, turnkey solutions, and strategic advisory services across five end-markets: Buildings, Energy, Mobility, Water, and Industry. Its technical stack centres on BIM-based design (recognised with a 2017 BIM d'argent award for the Arturo Merino Benítez Airport terminal) and the proprietary ANG360 Property Recovery platform, which integrates 360-degree remote project monitoring with parallel design, planning, and procurement to compress disaster-recovery contract durations.

The company serves both public-sector clients — primarily NHS Trusts engaged in the New Hospital Programme and RAAC remediation (James Paget, Queen Elizabeth Kings Lynn, West Suffolk, Mid and South Essex, Homerton, Colchester) — and private enterprises including Shell, Costa Coffee, McDonald's, Copenhagen Airport, and the NeuConnect UK-Germany interconnector consortium. Revenue is generated through fee-based professional services and managed-services contracts, with multi-year engagements on major capital programmes; pricing is project-specific and quote-based. Go-to-market relies on direct enterprise sales, competitive public-sector tendering, and intra-group referrals via the Artelia network spanning 40+ countries.

Castons operates from 14 UK offices (London headquarters at High Holborn, Ipswich regional headquarters, and a network across Scotland, the Midlands, Wales, and the South West), and is led by Managing Director Mark Day alongside a director bench with sector specialisms in healthcare, heritage, residential, commercial, and education. Notable credentials include EcoVadis Gold Medal (top 2% of engineering and architecture firms), SBTi signatory status, RIBA Suffolk Design Award 2023 for The Nest SEND facility, and a Healthcare Estates Award win for the Hellesdon Rivers Centre.

Name

Castons

Legal name

Castons

Website

https://castons.com

Company type

Private

Founded year

1895

Operating status

Operating

Headcount range

51–100 employees

Short description

Castons is a UK construction consultancy founded in 1895, operating as a 100% employee-owned subsidiary of Artelia Group. It delivers project management, cost management, engineering, and specialist insurance-recovery services to NHS Trusts, infrastructure clients, and corporate enterprises across five end-markets from 14 UK offices.

Ownership category

akta.pro rank

Headquarters

HQ city

Ipswich

HQ country

United Kingdom

HQ region

Europe

Offices14 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Services - Consultancy: Fee-based professional services including project management, quantity surveying, cost management, contract administration, and engineering consultancy. Revenue generated through project-based engagements with public and private sector clients.
2. Management Contracting: Specialist main contractor service managing design to completion, working with trusted consultants, sub-contractors and suppliers. Fixed management fee structure.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Castons is a UK-based multi-disciplinary construction consultancy delivering project management, cost management, quantity surveying, engineering and design services. The firm operates across the healthcare, education, energy, mobility, water and industry sectors, supporting clients from feasibility and masterplanning through design, construction, asset management and insurance recovery.

Product overview

Castons is one of Ipswich's longest-established property and construction consultancies, founded in 1895, operating as part of the international Artelia Group. The company offers a multi-disciplinary consultancy providing services across five core markets: Building Construction, Energy, Mobility, Water, and Industry. Its service portfolio includes project and cost management, engineering and consulting, insurance recovery (ANG360), management contracting, and turnkey solutions. The offering operates as a unified consultancy model rather than a software platform, delivering end-to-end services from strategic consulting and masterplanning through to design, engineering, construction management, and asset management. Notable specialized services include the ANG360 disaster recovery solution for insurance reinstatement and heritage restoration.

Differentiator

Problem solved

Functional benefit

Products and services

• Project & Cost Management
• Engineering & Design Consulting
• Quantity Surveying
• Building Surveying
• Masterplanning & Feasibility
• Asset & Facilities Management
• Management Contracting
• Turnkey Solutions
• ANG360 Insurance Recovery
• Strategic Consulting

Quantifiable outcome

• Delivered award-winning James Paget Hospital Concept Ward in 9 months modular build, 1920m2
• +3 more outcomes

Named customers14 records

Segments9 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Artelia GroupcoreStrategic or Co-development PartnerCastons is a UK subsidiary of Artelia Group, an international multi-disciplinary consultancy, engineering and project management group. This partnership provides Castons with access to global expertise, innovative solutions and a network of specialists operating in more than 40 countries.
• St Elizabeth HospiceminorOthersCastons supports St Elizabeth Hospice as their Charity of the Year. The hospice provides specialist palliative and end-of-life care across East & Mid Suffolk, Great Yarmouth and Waveney.
• Suffolk New CollegeminorStrategic or Co-development PartnerCastons works closely with Suffolk New College to encourage new entrants into the built environment sector through education partnerships and career pathways.
• Suffolk Chamber of CommerceminorGTM or Marketing PartnerCastons Artelia has become a Patron of Suffolk Chamber of Commerce, participating in events including business showcases at the House of Commons.
• West Suffolk NHS Foundation TrustcoreImplementation/ SI/ Consulting PartnerCastons is supporting the Trust in delivery of a new specialist CL3 laboratory, continuing a partnership for healthcare facility development.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Pick Everard: UK multi-disciplinary consultancy providing project management, cost consultancy, and engineering across buildings, infrastructure, and energy. Closely matches Castons' service portfolio and UK regional delivery model.
• Currie & Brown: UK-headquartered cost management, project management, and advisory consultancy. Direct competitor for cost consultancy, quantity surveying, and PM mandates in healthcare, energy, and infrastructure.
• Gleeds: Global property and construction consultancy with UK heritage in cost management and project management. Comparable multi-disciplinary model, public sector tilt, and similar scale bracket to Castons.
• Turner & Townsend: Global cost management, project management, and advisory consultancy with deep UK presence across real estate, infrastructure, energy, and natural resources. Directly comparable to Castons' project/cost management core services and NHS/public sector exposure.
• Rider Levett Bucknall (RLB): International property and construction consultancy with strong UK quantity surveying and project management practice. Closely aligned to Castons' traditional surveying roots and sector mix including healthcare, education, and commercial developments.
• Mace: UK-headquartered consultancy and construction group providing project and cost management alongside main contracting. Comparable in offering management contracting, consultancy, and turnkey solutions for complex building and infrastructure programmes.

Broad incumbents

• Mott MacDonald: Large global engineering, management, and development consultancy with extensive UK presence. Overlaps with Castons in cost/PM advisory and infrastructure (mobility, water, energy) but operates at substantially greater scale.
• WSP: Global professional services consultancy with major UK property and infrastructure advisory operations. Comparable across mobility, water, energy, and building sectors; competes for similar public and private sector mandates.
• Arcadis: Global design, engineering, and management consulting firm with strong UK cost management and project management business. Competes on similar NHS, energy, and mobility mandates but at significantly larger scale.

Others

• Artelia Group: Parent company of Castons, an international multi-disciplinary engineering and project management group operating in 40+ countries. Relevant as the controlling parent that shares branding (Castons Artelia), ESG credentials, and cross-referral opportunities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/castons
• Xx.com/_castons
• Facebookfacebook.com/CastonsQS

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 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 Castons