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Sustainable Architecture & Energy Efficiency Experts
Established in Derry with over two decades of expertise, we specialise in architectural design and energy consultancy focused on low-energy sustainable buildings. Our team combines extensive experience in residential, commercial, healthcare, and education sectors with unique qualifications in energy performance assessment and thermal efficiency. We deliver tailored solutions to enhance building sustainability, including SAP energy assessments, thermal bridge analysis, and air leakage surveys. Our approach prioritises measurable outcomes, such as reducing energy bills by up to 2,500 annually through targeted improvements. With accreditations including RIBA membership and Stroma-certified thermal bridge assessment, we provide technically rigorous yet practical design advice.

We advocate for local economic resilience through energy-efficient building practices and community-focused initiatives. Our work spans Northern Ireland and Donegal, supported by a proven track record of award-winning projects. We integrate cutting-edge tools like thermal imaging and SAP 2012 software to deliver precise, actionable recommendations. Our commitment to education extends to part-time lecturing in building technology, ensuring our practice remains at the forefront of industry advancements. We address both immediate client needs and long-term environmental challenges through holistic design solutions.
Services
Energy Assessments Thermal Bridge Analysis Air Leakage Surveys Building Insulation Ventilation Systems Boiler Upgrades Solar Panel Installation Sustainable Design Thermal Imaging EPC Reports
Highlights and features
  • We offer 20+ years of architectural experience across residential, commercial, and healthcare sectors
  • Our team holds specialist accreditations including SAP energy assessment and thermal bridge analysis
  • We guarantee measurable energy savings through data-driven recommendations
  • We combine practical building knowledge with academic expertise as former building technology lecturers
  • Our solutions integrate health-focused ventilation systems with cost-effective energy efficiency measures
Associations and certifications
  • Royal Institute of British Architects
  • Stroma Thermal Bridge Assessor
  • Code for Sustainable Homes Assessor
  • BRE Domestic Refurbishment Assessor
Services
Energy Assessments
We conduct comprehensive energy performance assessments for new and existing homes using SAP 2012 software. Our evaluations identify cost-effective improvements that can reduce energy bills by up to 2,500 annually. Clients receive detailed reports with prioritised recommendations for insulation, ventilation, and heating system upgrades.
Thermal Bridge Analysis
Our certified thermal bridge assessments identify areas of significant heat loss in building structures. Using advanced modelling techniques, we pinpoint weaknesses in insulation and construction that contribute to energy inefficiency. This analysis forms the basis for targeted retrofit solutions that improve comfort and reduce heating costs.
Air Leakage Surveys
We perform air tightness testing using door blower fans and thermal imaging to detect draughts. Our surveys reveal gaps equivalent to multiple basketball-sized openings in typical homes. We then recommend sealing strategies that can save up to 130 annually while improving indoor air quality and reducing condensation risks.
Ventilation Systems
We design mechanical ventilation systems that maintain healthy indoor air quality while preserving energy efficiency. Our solutions address CO2 levels exceeding 1,200ppm in occupied spaces, reducing health risks and improving productivity. Systems incorporate heat recovery to maintain thermal efficiency while preventing the spread of airborne illnesses.
Solar Panel Installation
We specify and install 3kW photovoltaic systems that generate 700 annual income through renewable energy production. Our designs optimise roof space while considering long-term efficiency, with panels guaranteed to retain 80% performance after 25 years. We integrate solar power with building energy strategies for maximum cost savings and environmental benefits.
People
Gavin Hegarty
Architect & Energy Consultant
With 20+ years' experience across Northern Ireland and Donegal, Gavin combines architectural practice with energy consultancy. He holds accreditations in SAP assessment, thermal bridge analysis, and domestic refurbishment. His work focuses on sustainable building solutions that improve both environmental performance and occupant health.
Questions
What energy efficiency grants are available for homeowners?
Grants of £400-£1,000 are available for boiler replacements through the Housing Executive. We can advise on eligibility and help maximise available funding for energy improvements.
How can I reduce my energy bills by £2,500 annually?
Our assessments identify priority measures like insulation upgrades, boiler replacement, and solar panels. Implementing these improvements typically reduces energy costs by £2,500 while increasing property value.
What causes poor indoor air quality in homes?
Carbon dioxide levels above 1,200ppm indicate poor air quality, often caused by inadequate ventilation. This leads to health issues and reduced productivity. We recommend mechanical ventilation systems to maintain healthy indoor environments.
How do I improve my EPC rating?
We conduct SAP assessments to identify specific improvements. Common recommendations include cavity wall insulation, air sealing, and heating system upgrades to move from average F32 to higher efficiency ratings.
What building types do you specialise in?
We work with 3-bedroom semi-detached and terrace properties from various eras, commercial buildings, healthcare facilities, and education institutions across Northern Ireland and Donegal.
How do energy efficiency measures affect property value?
Implementing our recommended improvements typically increases property value by £10,000 while reducing annual energy costs by £2,576 through enhanced insulation, ventilation, and renewable energy systems.