Home and Dry
- Guidance from The Ulster Architectural Heritage Society on the repair and maintenance of old buildings. Includes visual guides to style and parts of a building, information on planning and the law, glossary and events listing.
- http://www.homeanddry.info/

The National Trust Northern Ireland
- Descriptions and visitor information for the National Trust's historic houses, gardens, scenic coastal walks, countryside estates, beaches and industrial heritage properties.
- http://www.nationaltrust.org.uk/main/w-global/w-localtoyou/w-northernireland.htm

Houses and Gardens of Ireland
- Association of owners and operators of great Irish houses and gardens, providing clickable mapping, news and property details, with details of country house accommodation also presented.
- http://www.gardensireland.com/

Hearth
- Committee for the restoration of historic buildings which are at risk of dereliction or loss. Provides details of current projects, news and information on how to apply for tenancy of completed buildings.
- http://freespace.virgin.net/hearth.nireland/

Ulster Architectural Heritage Society
- Promotes the appreciation and conservation of architecture from the prehistoric to the present in the nine counties of Ulster.
- http://freespace.virgin.net/mp.hearth/

Queen's University Belfast School of Architecture
- Offers BSc Architecture, BArch and MSc in Architecture. Course information, staff and research.
- http://www.qub.ac.uk/arc/

Environment and Heritage Service Northern Ireland
- The government agency protecting and conserving the natural and built environment explains its responsibilities and activities.
- http://www.ehsni.gov.uk/

Planning Architecture Design Database Ireland
- PADDI is a searchable bibliographic database on all aspects of the built environment and environmental planning in Ireland, north and south.
- http://www.paddi.net/