BCMS Commencement Notices 2020

A Commencement Notice (CN) is a notification to a Building Control Authority (BCA) that a person intends to carry out either works or a Material Change of Use to which the Building Regulations apply. The notice must be given to the authority not more than 28 days and not less than 14 days before the commencement of works or the change of use. Once validated by the building control authority, works must commence on site within the 28 day period.

In the case of large developments, it is practical to submit a CN for each phase. The number of units scheduled to commence under a specific phase should be recorded in the CN.

The Local Government Management Agency (LGMA) operates the Building Control Management System (BCMS). It facilitates CNS to be submitted online. The Department cleans and collates the data before publishing it on a monthly basis.

This data series on commencement notices is available from March 2014. It is broken down by local authority, number of notices for residential development, number of residential units and the number of one-off residential units. More granular data on commencement notices can be found at https://www.localgov.ie/

Data from March to May 2019 has been revised. The figures for those months were Originally under-stated due to a data processing error.

开工通知书（Commencement Notice, CN）是指向建筑监管当局（Building Control Authority, BCA）提交的通知，用于告知相关方拟开展属于《建筑法规》适用范围的工程或用途实质变更。该通知书须在工程开工或用途变更实施前不少于14天、且不超过28天提交至该当局。经建筑监管当局核验通过后，相关工程须于28天内启动现场施工。
针对大型开发项目，分阶段提交开工通知书（CN）更为符合实操需求。特定开发阶段计划开工的住宅单元数量，需在开工通知书中予以记录。
地方政府管理局（Local Government Management Agency, LGMA）运营建筑监管管理系统（Building Control Management System, BCMS），该系统支持开工通知书的在线提交。相关部门会对数据进行清洗与整合，随后按月发布数据集。
本开工通知书数据集的可获取时段始于2014年3月，数据按地方当局、住宅开发类通知书数量、住宅单元总数及独立住宅单元数量进行分类统计。更细分的开工通知书数据可通过https://www.localgov.ie/ 查询获取。
2019年3月至5月的数据已完成修订。此前因数据处理失误，该时段的统计数值被低估。