Energy & sustainability consultancy — Ireland & UK
Building performance, measured and improved
Energy modelling, sustainability and building-performance analysis for architects, developers and contractors — used early enough in the design to change the result, not just report on it.
Who we are
An independent Irish practice
Established in 2024 and working across Ireland and the UK — dynamic, cost-effective and innovative, with direct principal involvement on every job.
Core focus
What we work on
Technical team
- Highly qualified, experienced staff
- In-house domestic BER assessor
- In-house non-domestic BER assessor
- LEED AP and BREEAM AP services
Why Renaissance Energy
What sets us apart
Integrated expertise
Energy, sustainability and building-performance analysis delivered under one consultancy — no hand-offs between suppliers.
Design-stage optimisation
Modelling and analysis used early, so the results inform practical design decisions while they can still be changed.
Compliance and performance
Regulatory, certification and real performance requirements supported together, not traded off against each other.
Cost-conscious advice
Value engineering and optimisation embedded in the service offering rather than charged as an extra.
Our capabilities
Four pillars, one consultancy
Energy, sustainability and building-performance analysis delivered under one consultancy — covering the full building-performance lifecycle, with no hand-offs between suppliers.
Energy performance
BER, Part L and NZEB compliance, and the thermal modelling behind them.
Building performance
Overheating, daylight, thermal comfort and load analysis on a dynamic model.
Sustainability
Planning-stage reporting, climate action and green building certification.
Renewable energy
Solar PV, storage, solar thermal and district heating sized against demand.
Energy performance and BER
Energy performanceDomestic and non-domestic BER, Part L and NZEB compliance modelling, and IES thermal modelling — from baseline assessment through to SEAI registration.
Overheating analysis
Building performanceDynamic 3D thermal modelling to CIBSE TM59, TM52 and TGD-020 — identifying overheating risk early enough to design it out rather than mitigate it later.
Daylight and building performance
Building performanceDaylight, thermal comfort and CIBSE load modelling — Radiance and IES analysis used to improve comfort, evidence compliance and size the plant properly.
Planning and sustainability consultancy
SustainabilityClimate Action Energy Statements, Sustainability Reports, Building Lifecycle Reports and the supporting technical analysis a planning application needs.
LEED, BREEAM and WELL certification
SustainabilityAccredited across all three systems — certification strategy backed by energy modelling, credit tracking and technical consultancy, from one point of contact.
Renewable energy
Renewable energySolar PV, battery optimisation, solar thermal and district heating — specified against the building as modelled, not against available roof area.
Not sure which of these you need?
Tell us about the project and the stage it is at. We'll set out which analysis is worth running now, which can wait, and what each one would tell you.
Selected work
Performance modelling on real buildings
BER assessments, dynamic energy modelling, overheating and daylight studies — delivered alongside architects, contractors and developers across Ireland.
Partners & clients
The teams we build with
Architects, contractors, developers, local authorities and engineering consultants across Ireland who bring us in on their projects — from early-stage compliance strategy through to as-built certification.
Get in touch
Start with a conversation
Tell us about your project. We respond to every enquiry within one working day.
Contact details
Credentials
SEAI registered energy assessors
In-house domestic and non-domestic BER
LEED, BREEAM and WELL accredited professionals
Projects across Ireland and the UK