| An introduction to the architectural heritage of County Leitrim | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dept. of the Environment and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2004 |
| An introduction to the architectural heritage of County Roscommon | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dept. of the Environment and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2004 |
| An introduction to the architectural heritage of Dublin north city | Kelly, Merlo | Monograph or Collective Volume | An Roinn Ealaíon, Oidhreachta agus Gaeltachta. Department of Arts, Heritage and the Gaeltacht | 2015 |
| An introduction to the architectural heritage of South Tipperary | National Inventory of Architectural Heritage | Monograph or Collective Volume | National Inventory of Architectural Heritage | 2007 |
| Ballyknockan : a Wicklow stonecutters' village | O'Reilly, BarryÓ Maitiú, Séamas | Monograph or Collective Volume | Woodfield Press | 1997 |
| Chapelmidway in transition | O'Reilly, Barry | Article in Journal | | 1988 |
| Hearth and home : the vernacular house in Ireland from c. 1800 | O'Reilly, Barry | Article in Journal | | 2011 |
| Living under thatch : vernacular architecture in Co. Offaly | O'Reilly, Barry | Monograph or Collective Volume | Mercier Press | 2004 |
| North Dublin - a case in point : the Skerries Heritage Project | O'Reilly, Barry | Article in Book | | 1994 |
| Now you see it, now you don’t : Irish legends of buried treasure | O'Reilly, Barry | Article in Journal | | 1994 |
| Ó bhun go barr an bhaile | Mac Cárthaigh, CríostóirO'Reilly, Barry | Article in Book | | 2001 |
| River claiming its due & the sod of death predestined (ML 4050 & MLSIT 4051) : two legends of fate in Irish tradition | O'Reilly, Barry | Article in Journal | | 1991 |
| St John's Church, Coolclogh, Co. Cork | O'Reilly, Barry | Article in Journal | | 2011 |
| The almshouses of Fethard, County Tipperary | O'Reilly, Barry | Article in Book | | 2007 |
| The Bolton Library | O'Reilly, Barry | Article in Journal | | 2008 |
| The vernacular settlements of south Kilkenny: an interim statement | O'Reilly, Barry | Article in Journal | | 2010 |