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About Us

Let us Introduce Ourselves

Our Mission

Our Mission, in partnership with our clients, to develop inspirational, relaxing and enjoyable living spaces through architectural design that combines clean elegant lines with low energy design solutions and to work with my clients vision for their home, whether it’s a new-build, conversion or extension.

architect dublin project one somerton castlenock

Garden Facade with Stunning View into the back garden

Our Philosophy

Our Philosophy is that your home is a reflection of you, your identity and your values and I work hard to get beneath the surface, to truly understand what it is you want to achieve. What’s important to you – lots of family space, entertaining, quiet spaces, or being green? It’s important to decide these things before you begin.

low energy architect project for ballyweelin rosses point sligo

Our Skills

Architectural Design

Energy Retrofits

Environmental Building Design

Master's Degree in Environmental and Energy Studies 2012

Construction Detail Analysis

CPD Diploma in Thermal Bridge Assessment 2013

Certified Passive House Designers

Why not get in touch to discuss your project. 

low energy architect project for ballyweelin rosses point sligo image one

Our Expertise

Sustainable Design

Project Planning


Energy Efficiency Design

3D Modelling

Planning & Project Management

Feasibility Studies


Isover Awards 2019 - Energy Efficient Design and Building


Low Energy Design received the Designer Award for Excellence in Residential Renovation Category at the Isover Awards 2019 for work on retrofitting St. Bricin's Park to EnerPHit standard. The announcements were made at a special event on 6th June at Smock Alley Theatre.

Irish Building and Design Awards

2019. | IBDA

St Bricin's Park won Retrofitting/ Renovation Project of the Year at the IBDA Award ceremony on 29th November 2019 at the Clayton Hotel

SEAI Energy Awards 2019

2019. | Sustainable Energy Authority of Ireland

St Bricin's Park was one of only 3 buildings in the country selected as a finalist in the National Building Energy Efficiency Awards 2019. A video of the project shown on the day adjoins this description.

Irish Construction Excellence Awards 2020

2020 | ICE Awards

St Bricin's Park is the only Retrofit project selected as a finalist in the ICE Awards 2020 in the Fit Out and Refurbishment category. The Award ceremony is on 28th March, 2020 at the Convention Centre.

Passive House Magazine Publications

Ballyweelin in Rosses Point, Sligo

St Bricin’s Park, Arbour Hill, Dublin

A few words about James Walsh


As a registered architect with the RIAI and with advanced energy and environmental training, my expertise covers all stages of design and build of hundreds of dwellings from the smallest projects to projects valued at over €150M.  I have over 28 years professional experience (13 years working as Director in OMS Architects), and I am one of the experts in Ireland on deep retrofit and passive house design, an emerging and important aspect of architecture.  They choose me for my unrelenting attention to detail, professional process and pride in the work I do.

Essentially though, they choose me for my ability to translate their vision into reality, to infuse their dreams and their unique style into what is a very personal and meaningful endeavour.  They know they have the freedom to express their unique style and preferences, to assert their overriding influence on the design of their home and be listened to by an expert with all of the necessary skills to do the job right, that also avoids long-term problems.

It is extremely frustrating for me to see builds that just don’t work, due to carelessness at the design stage and which could have been avoided had the designer the knowledge and experience to adjust the plans at the beginning.  Often, projects take on an aspect of problem solving. I can spot these problems a mile off, and work the design to get the best solution possible within the confines of the project.

Ultimately, all of this translates into the fusing of your vision with quality design aesthetic and the rigours of building performance targets. And it shows in the final result: Considerate and stylish solutions that create a delightful ambiance, reflecting your identity, combined with well-proportioned space, warmth and high air quality in a home that will bring you joy for many years to come.

With almost three decades of experience, expert masters degrees, most recently MSc Architecture in Advanced Environmental and Energy Studies awarded with Merit in 2012, I have all of the skills required.
I am a registered architect with RIAI Environmental CPD Accreditation received in 2013 in recognition of my expertise in the field of Environmental Architecture. I am a Certified Passive House Designer and Thermal Modeller following successfully completing a third level diploma course at Dublin Institute of Technology in June 2013 and am on the NSAI Thermal Modeller’s Register.

I continuously keep abreast of latest research, and I am often found attending key industry conferences both in Ireland and abroad, as well as architectural forums and groups online. I also maintain a network of vibrant industry partners.

low energy building designed by John walsh from Low Energy Design



Low energy architect dublin project of Minna Deep Retrofit five


Abbeytown Ballisodare Renovation



St. Bricins Park Dublin



Passive House Magazine Publications

Ballyweelin in Rosses Point, Sligo

St Bricin’s Park, Arbour Hill, Dublin