Drawings acquisitions range for single items to sets of drawings for an individual building to the complete drawings archive of an architectural practice. Drawing can be accompanied by a range of related material including correspondence, planning, client and contractor files, bills of quantities and specifications, site meeting minutes, photographs, and financial documentation.

The earliest drawings in the Archive’s collections are designs of the 1690s for a magazine in St. John’s Castle, Limerick, and the collections  include drawings in every kind of medium used by architects over the past 400 years. In addition, the Archive houses over 90 architectural models.

Major collections include:
Ashlin & Coleman Collection (76/1)
Boyd Barrett Murphy O’Connor Collection (95/148)
Aodhagán Brioscú Collection (2003/71)
Buchan Kane Foley Collection (2000/12)
Burgage Collection (78/36)
R.M. Butler Collection Charleville Castle Collection (86/24)
Alfred Cochrane Collection (2000)
Coolmore Collection (82/59)
County of Cork Club House Collection (81/85)
T.J. Cullen Collection (85/62 and 2000/40)
Emo Court Collection (91/101)
Desmond FitzGerald Collection (99/21)
Dunphy O’Connor Baird Collection (2000/164)
J. Desmond Featherstone Collection (2002/74)
Forenaughts Collection (80/33)
Charles Geoghegan Collection (80/32)
Group 91 (2009/152)
Guinness Collection (96/68)
Alan Hope Collection (86/127)
Inis Gibson Collection (85/45)
Brendan Jeffers Collection (92/34)
W.A. Johnston Collection (2000/104)
Jones & Kelly Collection (88/62)
Simon J. Kelly Collection (2000/136)
McCurdy & Mitchell Collection (79/17)
Raymond McGrath Collection (78/30)
Noel Moffett Collection (98/48)
Niall Montgomery & Partners Collection (2001/73)
Brendan Morris Collection (2000/168)
Munden & Purcell Collection (85/141)
Brian O’Carroll Collection (96/95)
Brendan O’Connor Collection (86/126)
O’Donnell and Tuomey (2012/8)
Donal O’Neill Flanagan Collection (92/23)
Ormonde Collection (77/9)
Aidan Powell Collection (2004/4)
Powerscourt Albums (89/62)
Anthony Reddy & Associates Collection (97/45)
RIAI Murray Collection (92/46)
Robinson Keefe & Devane Collection (86/93)
Frederick Rogerson Collection (98/7)
Patrick Rooney & Associates Collection (95/73)
Royal Barracks Collection (94/5)
Michael Scott Collection (89/44)
Scott Tallon Walker Collection (80/21)
Sibthorpe Collection (78/22)
Sligo Lunatic Asylum Collection (89/11)
Stephenson Gibney Collection (89/24)
Townley Hall Collection (85/156)
Derek Tynan Architects (2010/53)
Tyndall Hogan Hurley Collection (98/61)
Workhouse Drawings Collection (85/138)