Belfast·SPG009 Retail and Main Town Centre Uses·Page 16·3.2.3
Retail impact assessment threshold limits
Council may set a threshold up to 2500m² gross external area above which retail or town centre development proposals require impact assessment, with flexibility to set lower thresholds.
Paragraph 6.283 of the SPPS gives councils the flexibility to set an appropriate threshold for their area, above which all applications for retail or town centre type developments should be accompanied by an assessment of retail impact and need. This threshold can be up to, but must not exceed, 2500m² gross external area.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/belfast/SPG009 Retail and Main Town Centre Uses.pdf