A Small Area is the finest standard geography used by Ireland's Central Statistics Office (CSO) for census reporting. There are 18,919 Small Areas covering the Republic, each containing roughly 80–120 households (around 300 people). iHouse uses Small Areas to attach demographic, income, and household-structure context to every property.
Small Area boundaries are designed to be: (1) compact and contiguous; (2) consistent with townland and electoral division boundaries where practical; (3) stable across census cycles so trend analysis works. They are revised lightly between censuses to track new estates and demolitions.
Each Small Area has a unique 9-character code. The first 6 characters denote the parent Electoral Division (ED), and the last 3 are the Small Area within that ED.
The Small Area Population Statistics (SAPMAP) release covers age structure, sex ratio, household composition, family type, nationality and ethnicity, religion, language at home, occupation by NACE category, industry, principal economic status, mode of travel to work/school, distance travelled, car availability, dwelling type, year built, period of construction, tenure, and rental sector.
Income is not published at Small Area level by the CSO directly — privacy thresholds prevent it. iHouse uses the Pobal HP Deprivation Index (which IS published at Small Area level) as a robust proxy for area affluence.
The geography hierarchy is: county → Local Electoral Area (LEA) → Electoral Division (ED) → Small Area. Counties (26) are the largest unit, Small Areas (18,919) the smallest standard one.
When iHouse reports neighbourhood statistics it uses Small Area where the data permits, falling back to ED-level data for fields that aren't published at SA level for privacy reasons.
The CSO publishes Small Area boundaries on its SAPMAP interactive map and as downloadable shapefiles. iHouse renders Small Area outlines on the map view for any property — toggle the demographics layer.
By design, around 80–120 households (300 people). In dense urban areas a Small Area may be a single apartment block; in rural Ireland it spans several townlands.
The headline demographics update with each Census of Population (every 5 years; last one was 2022, next is 2027). Pobal HP Index updates after each census release.