NetZero Group Retrofit Solutions

NetZero Group retrofit solutions are large-scale energy upgrade services for apartment, multi-unit, and residential buildings across Ireland. Working with local authorities, approved housing bodies, private rental schemes, and SEAI-supported programmes, NetZero Group’s Retrofit Division improves thermal performance, building fabric, and long-term property value, with 2,100 units completed across Ireland to date.

Whether you need apartment retrofit Ireland, deep retrofit Ireland, or multi-unit retrofit Ireland delivery, our team manages the full process from assessment to BER rating improvement.

Enquire about your retrofit programme today.

Aerial view of suburban homes, rooftops, and tree-lined streets under a clear sky, showing residential retrofit potential. Aerial view of suburban homes, rooftops, and tree-lined streets under a clear sky, showing residential retrofit potential.

Multi-Unit Retrofit
Solutions in Ireland

NetZero Group Retrofit Division partners with local authorities, approved housing bodies, private rental scheme and institutional landlords and SEAI supported programmes to deliver large scale and high quality retrofit and energy upgrade solutions. We focus on improving the thermal performance, comfort and long-term value of apartment developments, multi-unit residential buildings, PRS portfolios and individual homes.

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Our Retrofit Process for
Energy Efficient Buildings

Our fully integrated team manages every stage of the process, from initial assessment and design to installation, commissioning, compliance, and occupant handover. This coordinated approach ensures measurable energy savings, reduced operational costs, and buildings that are ready for the future.

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Define Objectives & Scope

We begin by shaping a shared brief clarifying retrofit goals, budget parameters, and success metrics across energy efficiency, carbon reduction, compliance, and asset value.

Assess Current Performance

Our engineers complete detailed surveys and energy assessments to establish the baseline: building fabric condition, existing heating and ventilation systems, and existing level of energy use.

Develop Retrofit Options

We create a suite of upgrade pathways, modelling the impact of insulation improvements, heat pump solutions, ventilation improvements, solar PV, and other measures. Each option includes projected energy savings, carbon reduction, grant eligibility, investment requirements, and expected occupant disruption.

Approve Investment & Design

Once the preferred pathway is agreed, we support funding approval (including SEAI schemes), then develop a coordinated technical design package covering everything from deep retrofit programmes and heat pump installations to insulation upgrades, ensuring full regulatory compliance and integration across systems.

Deliver, Commission & Handover

Our delivery teams install each measure to the highest standard across apartment, multi-unit, and mixed-use retrofit projects throughout Ireland. We commission all systems, complete quality and BER verification, and hand over fully operational, optimised buildings ready for long‑term performance.

Building Performance Upgrades

NetZero Group brings together decades of experience in sustainable energy, delivering energy efficiency and retrofit projects that reduce costs and carbon emissions – accelerating the shift toward greener, more efficient buildings across Ireland.

Scalable Retrofit Solutions for Ireland

As Ireland moves towards a more sustainable, energy-efficient future, the demand for expert delivery is growing across new developments, large-scale regeneration, retrofits and home energy upgrades. NetZero Group provides solutions that combine technical know-how with smart design, value engineering and a coordinated approach. This ensures long-term impact and maximises the value of every project.

Aerial view of Irish housing estate for large-scale residential retrofit, BER upgrades and low-carbon energy improvements plan.

New build developments

Partnering with residential developers nationwide, we deliver smart, scalable, and sustainable energy solutions at scale, combining industry leadership with the capability to deliver complex developments safely, efficiently, and on schedule.

View our new build energy solutions

Dublin docklands apartments and commercial buildings for retrofit, BER upgrades and low-carbon energy improvements in Ireland.

Commercial

Powering commercial projects with high-performance, energy-efficient building services.

Find out about our commercial building services

Net Zero Group technician inspecting external heat pump units during retrofit works for Irish houses and commercial buildings.

Servicing

Protecting system performance, efficiency and manufacturer warranties through expert nationwide servicing.

Learn about our nationwide servicing

Technician installing solar PV panels for residential and commercial retrofit projects, BER improvements and energy upgrades.

Solar PV

Helping homes and businesses reduce costs and carbon with expert Solar PV and clean energy solutions.

See our Solar PV installations

Find out more about Innovation
and green transition

Insight
23rd June 2026

Case Study: Bray Fire Station

Read More
Insight
9th April 2026

Solar PV for Apartments: Procurement Guide

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Insight
8th April 2026

Solar PV for Housing Developments: Developer Guide

Read More

Retrofit Accreditations and Certifications

Focused on risk-based thinking, leadership, and continual improvement

Focusing on reducing environmental impact, waste, and energy consumption

Dedicated to managing risks and improving safety performance

Frequently asked
questions.

Can’t find your question in the list?
Get in touch, we’ll be happy to help.

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NetZero Group delivers large-scale retrofit programmes for approved housing bodies, local authorities, and private rental landlords across Ireland. Our services cover insulation upgrades, heat pump installation, ventilation, solar PV, and heating controls managed end-to-end from initial assessment through to BER verification and handover. We work across SEAI-funded schemes and privately commissioned programmes. Speak to our team about your programme requirements.

We handle every stage in-house from defining objectives and energy assessments through to technical design, installation, commissioning, and occupant handover. This fully integrated approach reduces coordination risk for clients managing large residential portfolios and ensures measurable energy savings, regulatory compliance, and quality sign-off at every stage. Speak to our team about your programme requirements.

Yes. NetZero Group is experienced in delivering large-volume retrofit programmes for approved housing bodies, local authorities, and REIT-owned residential stock. We hold a 4.7% market share of the Irish retrofit market, with 2,100 units completed across approved housing body, local authority, and REIT-owned residential stock.Our team handles tendering, programme management, installation, and compliance reporting.

NetZero Group is experienced in responding to public procurement tenders and framework agreements for retrofit programmes across approved housing bodies and local authorities. We understand the compliance, reporting, and BER verification requirements that apply to publicly funded works, and our team can support clients from the tender scoping stage through to full programme delivery.Request a project consultation to discuss your procurement requirements.

Can’t find your question in the list?
Get in touch, we’ll be happy to help.

Contact us