What Carron + Walsh does

Carron + Walsh Construction Consultants Limited is an Irish professional consultancy founded in 2010 by Denis Carron (Quantity Surveying) and Marian Walsh (Project Controls and Project Management), headquartered in Dun Laoghaire, Dublin. The firm delivers three integrated core services — Quantity Surveying, Project Controls, and Project Management — for capital projects ranging from €1 million to over €1 billion in value across 10 sectors including Commercial Office, Education, Life Sciences & Healthcare, Industrial & Manufacturing, Residential, Public Realm, Sports & Leisure, Tourism, Conservation and Civic. Service delivery is anchored by chartered professionals (MRICS, FRICS, MSCSI, FSCSI) and specialist divisions in MEP Quantity Surveying and Conservation Surveying, using industry-standard tools including Oracle Primavera P6, Microsoft Project, ASTA Powerproject, @Risk for Monte Carlo Simulation and BIM modelling for complex pharmaceutical and healthcare environments.

The firm's go-to-market is enterprise and government field sales: services are scoped per engagement, billed on a professional services basis against multi-year project mandates, and delivered directly from three Irish offices (Dublin headquarters, Waterford, and Cork, the last opened March 2025). Customer logos span Irish public bodies (IDA Ireland, Office of Public Works, Health Services Executive, Department of Education & Skills, State Committee on Urban Planning and Architecture of the Republic of Azerbaijan) and private developers (Fawaz AlHokair Group, Eirgen Pharma, Smartply Europe/Coillte, U+I Group), with stated repeat business exceeding 90%. The business operates across Ireland, Europe and the Middle East, with over 500 projects delivered to date.

In March 2025 Carron + Walsh was acquired by Tetra Tech (NASDAQ: TTEK), a 30,000-employee global consulting and engineering firm specialising in water, environment, sustainable infrastructure and the built environment. The company retains its existing leadership and management team and continues to operate as an independent business unit within the Tetra Tech network, gaining access to broader technical resources and international infrastructure programs. Revenue is not publicly disclosed.

Name

Carron + Walsh

Legal name

Carron + Walsh Construction Consultants Limited

Website

https://carronandwalsh.com

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

11–50 employees

Short description

Carron + Walsh is an Irish professional consultancy founded in 2010 providing Quantity Surveying, Project Controls, and Project Management for capital projects ranging from €1M to €1B+ across 10 sectors, now operating within the Tetra Tech global network.

Ownership category

akta.pro rank

Product category

Construction Project Management and Cost Consultancy

NAICS

Utility System Construction (2371)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight) (EUANALAE)

akta.pro secondary industries

Capital Planning, Portfolio Prioritization & Funding (EUANALAB), Infrastructure & Project Finance Advisory (BPAHADAO)

Keywords

• Quantity surveying services
• Project management consultancy
• Project controls services
• Cost management consulting
• Construction cost consultancy

Headquarters

HQ city

Dublin

HQ country

Ireland

HQ region

Europe

Offices3 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 - Quantity Surveying: Cost control services from benchmarking to whole life costing models providing cost control through the development process from project inception to handover. Services include benchmarking, capital allowances, cost benefit analysis, cost control, due diligence, feasibility studies, grant application support, procurement advice, risk management, value engineering, and whole life costing.
2. Project Management Services: Full suite of project management services from project inception to project handover, including feasibility reports, funding process, design team appointment, planning process, tender process, commissioning and handover. Revenue is generated through professional service fees for managing capital projects.
3. Project Controls Services: Programme management, cost security and comprehensive risk management services. Includes project planning, scheduling, earned value analysis, cost engineering, change management, and risk assessment using specialized software tools.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Carron + Walsh provides professional consultancy services covering Quantity Surveying, Project Controls, and Project Management for capital construction and development projects. The firm delivers cost control, risk management, scheduling, contract administration, and full project management from inception through handover for projects ranging from €1 million to €1 billion across commercial, residential, life sciences, healthcare, education, civic, industrial, sports, conservation, and tourism sectors.

Product overview

Carron + Walsh is a professional consultancy practice offering three integrated core services: Quantity Surveying, Project Controls, and Project Management. These services are delivered as consulting engagements rather than software products, providing clients with cost management, program management, and project delivery solutions for construction and development projects. The firm manages capital projects across sectors including commercial, residential, life sciences, civic, education, and infrastructure.

Differentiator

Problem solved

Functional benefit

Products and services

• Quantity Surveying Cost control services including benchmarking, cost planning, cost benefit analysis, value engineering, whole life costing, capital allowances and procurement advice for construction projects across all sectors. Delivered as a B2B consultancy engagement to enterprise and government clients.
• Project Controls Programme management, cost security and risk management services covering project planning and scheduling, earned value analysis, cost engineering, change management, and risk assessment using Oracle Primavera P6, Microsoft Project, ASTA, and @Risk for Monte Carlo Simulation.
• Project Management Discipline of planning, budgeting, appointing, securing and managing resources to achieve pre-defined project goals, covering feasibility reports, funding process, design team appointment, planning process, tender process, commissioning and handover from project inception to completion.

Quantifiable outcome

• Over 90 percent of work is repeat business from loyal customers
• +2 more outcomes

Named customers15 records

Segments10 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• Tetra TechcoreStrategic or Co-development Partner · 27 March 2025Carron + Walsh joined Tetra Tech, a leading global provider of high-end consulting and engineering services with 30,000 employees specializing in water, environment, sustainable infrastructure, and the built environment. Tetra Tech operates 'Leading with Science' to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition. The partnership provides Carron + Walsh with greater opportunities while maintaining their existing leadership and management team. This marks a new chapter for the company while their mission remains the same.

Scale indicators6 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• WSP: Global professional services consultancy with a strong project management and cost management offering in built environment and infrastructure. Competes with Carron + Walsh on large public-sector programs.
• AECOM: Global infrastructure consultancy with extensive program management, cost consulting, and project controls capabilities. Larger-scale competitor for major public and private capital programs in Ireland and the UK.
• Arcadis: Global design and consultancy firm with a large project and program management practice. Broader portfolio than Carron + Walsh, but directly competes for Irish and European infrastructure and built environment mandates.
• Mace Group: International consultancy and construction firm with a dedicated cost consultancy and project management practice. Broader scope than Carron + Walsh, but overlaps on PM/QS engagements in real estate and infrastructure.

Direct peers

• Gleeds: International construction consultancy offering quantity surveying, project management, and advisory services. Overlaps with Carron + Walsh in life sciences, commercial, and public sector work.
• Turner & Townsend: Global cost management and project management consultancy with a strong Irish and UK presence, serving real estate, infrastructure, and natural resources. Directly competes for the same QS and PM mandates as Carron + Walsh.
• Currie & Brown: Global construction consultancy specializing in cost management, project management, and advisory across built environment sectors. Closely comparable service portfolio and target client base.
• Rider Levett Bucknall (RLB): Global construction cost management and project management consultancy with a strong QS heritage. Competes for the same enterprise and government capital-project mandates.
• Linesight: Irish-headquartered construction consultancy providing cost management, project management, and project controls across real estate, infrastructure, and data centers. Most direct comparable in geography, service mix, and target sectors.

Regional players

• Bruce Shaw Group (now part of Varming Consulting Engineers): Irish construction cost consultancy historically serving residential, commercial, and public sectors. Highly comparable in local market positioning, scale, and service mix, though now operating within a larger engineering group.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 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 Carron + Walsh