Business Details
50+ Years
experience
Trusted Engineering Consultants in the UK & Ireland
Established in 1911, Delap & Waller has built a century-long reputation for engineering excellence. Our firm specialises in mechanical, electrical, and sustainability engineering, alongside digital construction solutions. With offices in Antrim, Dublin, and London, we serve clients across the UK, Ireland, and internationally. Our approach combines heritage innovation with modern methodologies, ensuring projects meet NZEB, LEED, and BREEAM standards. Accredited under ISO 9001, ISO 14001, and ISO 19650, we prioritise quality, sustainability, and leadership. Clients like Marks & Spencer and Titanic Quarter Ltd. trust our hands-on director-led service, which spans retail, healthcare, and heritage sectors.Our team's expertise in BIM and low-carbon design has delivered award-winning projects, including LEED Platinum-certified developments. We maintain transparency, responsiveness, and technical excellence, fostering long-term client relationships through tailored solutions.
Services
Mechanical Engineering
Electrical Engineering
Sustainability Services
Digital Construction
MEP Consulting
Details
- Year established: 1911
Highlights and features
- Direct director involvement from project inception to completion
- 100+ years of engineering innovation and client trust
- ISO 9001 and ISO 14001 accredited quality and environmental systems
- BIM-certified engineers with Autodesk Revit expertise
- Proven track record in LEED/BREEAM-certified developments
Associations and certifications
- ISO 9001
- ISO 14001
- ISO 19650
- SSIP
- Cyber Essentials
What people say
Professional manner
Added value
Responsive expertise
Successful re-launch
Quality design information
Services
Mechanical Engineering
We design tailored mechanical systems for new builds, expansions, and refurbishments. Our expertise covers ventilation, heating, and chilled water systems, ensuring optimal building functionality. With experience in commercial, industrial, and heritage projects, we prevent costly planning errors while prioritising energy efficiency and occupant comfort.
Electrical Engineering
Our electrical design services include lighting controls, fire protection, and power distribution systems. We specialise in complex installations for residential, healthcare, and retail sectors. Achieving Platinum LEED certifications, our engineers integrate security, telecommunications, and energy-efficient solutions across large-scale developments.
Sustainability Services
We deliver NZEB, LEED, and BREEAM-certified projects through thermal modelling and renewable energy strategies. Our ISO 14001-accredited team provides SAP calculations, daylight assessments, and life cycle costing. Expertise spans passive house designs and low-carbon retrofits for commercial and healthcare sectors.
Digital Construction
Using Autodesk Revit and Navisworks, we create 3D models to prevent construction clashes. Our BIM services improve collaboration across education, retail, and residential projects. We provide execution plans, MEP coordination, and common data environments to enhance project efficiency and safety.
MEP Consulting
We integrate mechanical, electrical, and plumbing systems for optimal building performance. Our consultants address fire safety, energy efficiency, and regulatory compliance. With cross-sector experience, we deliver coordinated solutions for hospitals, stadiums, and mixed-use developments across Europe and the Middle East.
People
Michael O'Doherty
Director
Leading mechanical engineering projects with 25+ years' experience in commercial and industrial sectors. Specialises in energy-efficient HVAC systems and complex refurbishments.
Eamonn Drummond
Director
Chartered mechanical engineer specialising in sustainable building systems. Brings expertise in low-carbon design and BREEAM certification for healthcare and retail developments.
Chris Walker
Associate Director
Electrical engineering lead with 18 years' experience in power distribution and smart building systems. Manages large-scale retail and infrastructure projects across the UK and Ireland.
Neil Fox
Associate Director
Specialises in digital construction and BIM implementation. Oversees MEP coordination for education and residential projects using Revit and Navisworks clash detection.
Ryan Scott
Sustainability Manager
Environmental engineering expert with ISO 14001 accreditation. Leads thermal modelling and renewable energy strategies for LEED-certified developments across Europe.
Questions
What engineering services do you offer?
We provide mechanical, electrical, sustainability, and digital construction services for new builds, refurbishments, and expansions across commercial, healthcare, and retail sectors.
Are you accredited for quality standards?
Yes, we hold ISO 9001 (quality), ISO 14001 (environmental), and ISO 19650 (BIM) certifications, alongside Cyber Essentials and SSIP health & safety accreditation.
Which sectors do you specialise in?
We focus on retail, healthcare, commercial, and heritage projects, with extensive experience in large-scale developments like hospitals, stadiums, and mixed-use buildings.
How do you handle international projects?
With offices in Antrim, Dublin, and London, we deliver projects across the UK, Ireland, Europe, Middle East, and Africa using coordinated BIM methodologies.
Can you support BREEAM or LEED certification?
Yes, our sustainability team provides thermal modelling, daylight assessments, and energy strategies to achieve BREEAM Excellence and LEED Platinum/Gold certifications.
How do directors engage with projects?
All projects benefit from direct director involvement, with mechanical, electrical, and sustainability leads maintaining hands-on oversight from feasibility to completion.
