National Inventory of Architectural Heritage (NIAH) National Dataset

Category: Environment
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The National Inventory of Architectural Heritage (NIAH) is a state initiative under the administration of the Department of Housing, Local Government and Heritage and established on a statutory basis under the provisions of the Architectural Heritage (National Inventory) and Historic Monuments (Miscellaneous Provisions) Act 1999.The purpose of the NIAH is to identify, record, and evaluate the post-1700 architectural heritage of Ireland, uniformly and consistently as an aid in the protection and conservation of the built heritage. NIAH surveys provide the basis for the recommendations of the Minister for Housing, Local Government and Heritage to the planning authorities for the inclusion of particular structures in their Record of Protected Structures (RPS).

This dataset is provided for re-use in a number of ways and the technical options are outlined below. For a live and current view of the data, please use the web services or the data extract tool in the Historic Environment Viewer. The NIAH also provide an Open Data snapshot of its national dataset in CSV as a bulk data download. It contains all the Ministerial Recommendations published to date and is updated as surveys are published.

Open Data Bulk Data Downloads (version date: 11/10/2023)

The NIAH Survey data is provided as a national download in Comma Separated Value (CSV) format. This format can be easily integrated into a number of software clients for re-use and analysis. The Longitude and Latitude coordinates are also provided to aid its re-use in web mapping systems, however, the ITM easting/northings coordinates should be quoted for official purposes.

GIS Web Service APIs (live views):

For users with access to GIS software please note that the NIAH data is also available as spatial data web services. By accessing and consuming the web service users are deemed to have accepted the Terms and Conditions. The web services are available at the URL endpoints advertised below:

NIAH Feature Service:

Historic Environment Viewer - Query Tool

The "Query" tool can alternatively be used to selectively filter and download the data represented in the Historic Environment Viewer. The instructions for using this tool in the Historic Environment Viewer are detailed in the associated Help file:

Data Resources (3)

available as CSV
available as html
available as esri rest

Data Resource Preview - NIAH Feature Service

Theme Environment
Date released 2023-10-11
Date updated 2024-01-12
Dataset conforms to these standards The INSPIRE Directive or INSPIRE lays down a general framework for a Spatial Data Infrastructure (SDI) for the purposes of European Community environmental policies and policies or activities which may have an impact on the environment.
Rights notes ['', 'Copyright Government of Ireland. This dataset was created by National Inventory of Architectural Heritage, Department of Housing, Local Government and Heritage. This copyright material is licensed for re-use under the Creative Commons Attribution 4.0 International licence.', 'otherRestrictions']
Update frequency Continuously updated
Language English
Geographic coverage in GeoJSON format {"type":"Polygon","coordinates":[[[-11.265947788472001, 51.205966241541006],[-11.265947788472001, 55.820224054041], [-5.7508110697222, 55.820224054041], [-5.7508110697222, 51.205966241541006], [-11.265947788472001, 51.205966241541006]]]}
Spatial Reference Systems (SRS) Irish Transverse Mercator (ITM, EPSG:2157)
Vertical Extent {"verticalDomainName": "EPSG Projection 5731 - Malin Head height", "minVerticalExtent": "0", "maxVerticalExtent": "0"}
Provenance information It is important to note that this mapping uses the Irish Transverse Mercator (ITM) co-ordinate system. In order to facilitate users during the transition from Irish Grid (IG) to ITM, downloads will include both sets of co-ordinates. The existing point centroids for the records were digitised relative to the OSI 6-inch mapping and the move from this older IG-referenced series to the larger-scale ITM mapping will necessitate revisions.