About Us

Coda Architects was established in 1996 by Nicki Cloonan and Brian O’Donnell.  Since that time we have gained valuable experience and established a reputation as an innovative but ultimately reliable practice. We have built up expertise in the following areas: Commercial; One off Residential & Residential Developments and Community & Public Works. We are a Grade One Conservation practice, with experience of work on Protected (Historic) Structures for both Public bodies and Private Clients. We also have a team specialising in large scale Commercial and Mixed Use developments, both new build and retrofit of existing including the design and detailing of  low energy solutions.

Coda Architects Limited is private limited company registered in Ireland (registered number 255392) trading as Cloonan O’Donnell Architects.


Brian O’Donnell, Director

B.Arch., Dip.Proj.Man, MRIAI

Brian graduated from UCD in 1991 with a B. Arch. degree. He became a member of the RIAI in 1996 and received a Diploma in Project Management in 1995 from Trinity College, and has been a guest lecturer to the UCD School of Architecture over a number of years. Brian is also a qualified PSDP since 2010 and holds a Grade II Conservation accreditation from the RIAI. Prior to establishing Cloonan O’Donnell Architects, Brian worked in private practice and with the Office of Public Works. Brian is Director with responsibility for project development.


Nicki Cloonan, Director


Nicki Cloonan graduated from UCD in 1991 where she also completed a Masters Degree in Urban and Building Conservation. She has a Diploma in Legal Studies from DIT and is a member of the RIAI since 1995 with whom she is also accredited as a Grade I Conservation Architect. Before establishing Coda in 1996 Nicki worked in private practice and for Dún Laoghaire Rathdown County Council. She has also taught Interior Architecture and Design in Blackrock Further Education Institute (formally SCD) for many years. Nicki is Director with responsibility for Conservation projects and both Domestic and Commercial interiors.