2019 Featherstone Young, London for Tŷ Pawb, Wrexham
2018 KKE Architects, Worcester for their work on St Davids Hospice Care in Newport
2017 Stride Treglown for Ysgol Bae Baglan, Port Talbot
2016 Hall & Bednarczyk for the Visitor and Water Sports Centre, Llandegfedd
2015 Loyn & Co. Architects for Millbrook House in Cardiff
2014 Loyn & Co. Architects for Stormy Castle, a family home in the Gower
2013 John Pardey Architects, Lymington for Trewarren House in the Pembrokeshire National Park
2012 HLM Architects, Cardiff for the Archbishop McGrath Catholic High School, Bridgend
2011 Ellis Williams Architect, Warringon for Mostyn Gallery, Llandudno
2010 No medal awarded
2009 Ray Hole Architects, Croydon for Hafod Eryri on the Snowdon Summit
2008 Purcell Miller Tritton, Bristol for the Blaenavon World Heritage Site
2007 Loyn & Co. Architects, Penarth for the Water Tower, Cyncoed, Cardiff
2006 Richard Rogers Architects, London for the Senedd, National Assembly for Wales, Cardiff
2005 Capita Percy Thomas, Cardiff for the Wales Millenium Centre, Cardiff
2004 Powell Dobson Architects, Cardiff for the Brewery Quarter area, Cardiff
2003 Nicholas Hare Architects, London for No 1 Callaghan Square, Cardiff
2002 Pembroke Design Ltd, Pembroke Dock for Ysgol Bro Dewi, St Davids
2001 David Lea and Pat Borer, Pen-y-bont Fawr for WISE at the Centre for Alternative Technology, Machynlleth
2000 Foster + Partners, London for the Great Glasshouse, National Botanic Garden of Wales, Llanarthne
1999 Smith Roberts Associates, Bristol for the Pembrokeshire Coast National Park Visitor Centre, St Davids
1998 Arup, London for the Control Techniques Research and Development HQ, Newtown
1997 PCKO Architects, Middlesex for The Swansea Foyer, Swansea
1996 Holder Mathias Alcock, Cardiff for the NCM Building (now Atradius), Cardiff Bay
1995 No medal awarded
1994 No medal awarded
1993 Niall Phillips Architects, Bristol for Lower Treginnis Farm, St Davids
1992 No medal awarded
1991 Allen Jenkins and Phil Read, South Glamorgan County Council, for the County Hall, Cardiff
1990 No medal awarded
1989 No medal awarded
1988 Welsh Health Common Services Authority for the Ystradgynlais Community Hospital
1987 Merfyn Roberts and Dewi-Prys Thomas for Gwynedd Council, Caernarfon
1986 Welsh Health Common Services Authority Architects for the Mold Community Hospital
1985 Bowen Dann Davies Partnership, Colwyn Bay am National Outdoor Centre for Wales, Plas Menai
1984 Bowen Dann Davies Partnership, Colwyn Bay for Capel y Groes, Wrexham
1983 Percy Thomas Partnership, Cardiff for Amersham International Laboratories, Cardiff
1982 Bowen Dann Davies Partnership, Colwyn Bay for Hafan Elen, Llanrug, Caernarfon
1981 No medal awarded
1980 No medal awarded
1979 Percy Thomas Partnership, Cardiff for the Hugh Owen Building, Aberystwyth University
1978 Percy Thomas Partnership, Cardiff for St Fagans National Museum of History, Cardiff
1977 Bowen Dann Partnership for the Hostel, Cefndy Road, Rhyl
1976 Percy Thomas Partnership, Cardiff for the Parke-Davis Pharmaceutical Building, Pontypool
1975 John Sam Williams, Pwllheli for the Special School in Y Ffôr, Pwllheli
1974 Percy Thomas Partnership, Cardiff for Albert Edward Prince of Wales Court Care Home, Porthcawl
1973 No medal awarded
1972 T G Jones and J R Evans for Little Orchard, Dinas Powys
1971 Percy Thomas Partnership, Cardiff for the Great Hall and Students Union, Aberystwyth University
1970 Sir Percy Thomas and Son, Cardiff for the Physics and Mathematics Building, Swansea University
1969 Ormrod Partnership, Liverpool for the Pilkington Perkin-Elmer Building, St Asaph
1968 Hird & Brooks, Cardiff for The Gore (house and swimming pool), Llantrisant Road, Cardiff
1967 No medal awarded
1966-61 – Medal not offered
1960 G Grenfell Baines & Hargreaves, Preston for the H J Heinz Offices, Cardiff
1959-54 – No medal awarded