Derry Ltd offer a Mechanical & Electrical Services Design capability to suit all Client requirements from inception through to full co-ordinated installation information for the construction team.

We have made significant investment to support the increasing integration of 3D software and industry requirement for BIM Modelling and as such can offer a true multidisciplinary approach to Design development and co-ordination in order to significantly reduce cost risk for our Clients.

BIM – Building Information Modelling

Derry Ltd are committed to meeting and exceeding our Clients Level 2 BIM expectations by creating internal workflows that encourage a ‘BIM is business as usual’ culture on all projects.

Through the use of specialist design and coordination tools; Revit MEP, MagiCAD and Navisworks Derry Ltd are delivering projects with improved efficiency and quality. Prototyping the build changes traditional design and build into design and assembly.

The virtually engineered model is the single source of truth that offers transparency and clarity of information for the design team, supply chain, and stakeholders. The BIM model enables better understanding through the design coordination and construction phases, reducing the number of errors and downtime.

Thermal Modelling

Derry Ltd are able to undertake detailed renewable technology feasibility and HVAC system analysis through the use of detailed 3D dynamic thermal models and simulation software.

We offer our Clients analysis and detailed reports to demonstrate compliance BREEAM & CIBSE requirements such as Overheating Analysis (BB101), Natural Ventilation Studies and Carbon Emission Reductions.

Energy & Sustainability

Derry Ltd can provide benchmark or detailed feasibility reports for all Low/Zero Carbon and Renewable Energy Systems such as; CHP (Combined Heat & Power), Solar Thermal, Air Source Heat Pumps and PV (Phot-voltaic).

The provision of these detailed Energy Reports provides Clients with important information to be utilised in support of BREEAM Credits and Planning Applications.

Part L & Energy Certification (EPC)

We are able to provide advice in relation to compliance with Part L Building Regulations requirements from inception through to construction.

Part L compliance calculations are undertaken by the use of industry accredited Dynamic Simulation Modelling software to produce detailed Part L Reports (BRUKL) and Energy Performance Certificates (EPC).

The provision of these detailed Energy Reports provides Clients with important information to be utilised in support of BREEAM Credits and Planning Applications along with recommendations for future energy saving strategies.


Derry Ltd if required can offer a complete BREEAM service – from early pre-assessments at planning application stage, through formal design stage submissions, to final post-construction stage certification or alternatively will offer advice and support through the Design & Construction Stage to external assessors.

A well designed BREEAM building will reduce energy, water and running costs and provide improved staff productivity through a comfortable, productive environment.

The positive public image a BREEAM rating can provide offers increased market value/rental costs to the end Client.

All our Design staff are experienced in all aspects of BREEAM across varied market sectors and construction types.

"Derry are one of the few building services engineers who have fully embraced BIM in their design work. Derry are able to provide a fully coordinated services model for BIM based projects. Derry were able to provide us with quality COBie data for Derby Innovation Centre." Chris Dixon - Franklin Ellis Architects