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design and analysis

  • architecture & eco design

  • analysis & research

  • consultancy & advice

Daylight Analysis
Quantitative and Qualitative
, Sunlight, and Overshadowing analysis

We provide professional daylight sunlight and overshadowing analysis suitable for planning applications of multi family and individual housing projects in the private and public sectors in Ireland and abroad. 

Get in touch at

Cultural building interior daylit Solearth
Architectural Design

We can help you achieve your grand vision. We bring decades of design leadership, endless creativity, curiosity and patience to the unique question that is your project. Design is our passion. 


New House Design and Planning Applications Co Cork

We are experienced at designing new homes for families just like yours. We create uplifting bright and sustainable designs that are both unique and comply with Cork County Council's rural house design guidelines and we will apply for planning permission for you. .



Domestic Building Energy Ratings

We now provide building energy ratings, U Value calculations and energy improvement specifications for dwellings.

SEAI Energy Assesor No: 109555

Daylight design excellence Solas Bhride project Solearth Desgn
over 25 years design and architecture expertise available to you

For more than two decades Brian T O Brien has been at the forefront of professional architecture and sustainable and eco design in Ireland and further afield. He is now based in West Cork, Ireland. 


Through Solearth his expertise is now available as a registered architect or consultant for projects and clients across Ireland and internationally.

Consult me about writing your brief, setting up your project or to discuss  research or innovation.

Heathy bright sunspace Solas Bhride project Solearth Design
Design Reviews and Improvements

We provide a design review service where we can evaluate and help improve a design done by others . From a design for a new house to reviewing your current home's layout, we can suggest ways to  make them better.  

Daylit bright house interior
Healthy bright interior Dechc Shying project Solearth Design
About is a design consultancy led by Brian T O Brien architect, founder of Opoplan and  previously director of Solearth Architecture. Solearth is the trading name of Open Plan Design a limited company registered in Dublin, Ireland. 

Brian T O Brien
MRIAI registered architect

Get In Touch

+353 87 2357530

We have no  connection with the Chinese company operating the domain 

contemporary sustainable architecture Grow HQ project Solearth Design
dramatic modern building Dechen Shying proje
Help Finding and Hiring an Architect or Design Team

For larger and more unique projects includng those overseas, we can help you decide whether and how to select and hire an architect or a whole design team for your project. We can help with developing a  brief and scope, and also guide you on budget and process. Challenging or cutting edge projects are of particular interest


We can help with with fee negotiations and terms of appointment and later can act on your authority to help you get the building you want while you stay focused on your core business. 

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