Home Size Statistics Ireland 2026: Average New-Home Size Was 31.5% Lower in 2025 Than in 2016

Last updated: September 2026. Human written and fact checked against each named source.

Ireland’s housing debate often focuses on how many homes are available, but the size and layout of those homes matter too. Floor area affects how people furnish, store and use a home, while bedroom and room counts help describe how much space is available to different households.

This 2026 roundup brings together the latest suitable figures from the Central Statistics Office and Eurostat. The year in the title is the publication year of this roundup. The underlying evidence spans Census 2022, full-year 2025 data and provisional results for the first half of 2026.

For complementary figures on household spending, retail prices and reuse, see our Irish furniture statistics roundup.

For a closer look at apartment residents, locations, tenure and space, see our apartment living statistics for Ireland.

Home size statistics at a glance

• Ireland had 1,836,728 occupied dwellings in Census 2022.
• There were 655,422 three-bedroom occupied dwellings, equal to 35.7% of the Census 2022 total.
• Across the homes included in the Domestic Building Energy Ratings Q2 2026 dataset, average floor area was 118 square metres.
• BER-rated detached houses averaged 169 square metres, compared with 93 square metres for mid-terrace houses.
• The estimated average size of a completed new dwelling was 114.3 square metres in 2025.
• Average completed-new-dwelling size fell by 31.5% between 2016 and 2025, calculated from the CSO’s published averages of 166.9 and 114.3 square metres.
• The provisional average for completions in the first two quarters of 2026 was 115.4 square metres.
• Ireland averaged 2.0 rooms per person in 2024, compared with 1.7 across the EU-27.
• Eurostat’s overcrowding rate was 5.0% in Ireland in 2024, compared with 16.9% across the EU-27.
• An estimated 66.8% of people in Ireland lived in under-occupied dwellings in 2024, about twice the EU-27 rate of 33.1%.

How many bedrooms do Irish homes have?

Census 2022 recorded 1,836,728 occupied private dwellings in permanent housing units. The bedroom question covered the home in which a household was living on Census Night, so the figures do not include every vacant dwelling or every property in the State.

Three-bedroom homes formed the largest group. The CSO bedroom table recorded 655,422 occupied dwellings with three bedrooms, which works out at 35.7% of the occupied-dwelling total. The CSO’s accompanying publication rounds this to 36%.

Four-bedroom homes were the next largest category. There were 471,449 occupied dwellings with four bedrooms, equal to 25.7% of the Census total. A further 291,785 homes had two bedrooms, representing 15.9%, while 101,644 had one bedroom, representing 5.5%.

At the larger end of the distribution, 113,041 occupied dwellings had five bedrooms, 22,391 had six and 7,013 had seven or more. Combining those published categories gives 142,445 homes with at least five bedrooms, or 7.8% of occupied dwellings.

These figures measure bedrooms, not total habitable rooms or floor area. A three-bedroom house can differ substantially from another three-bedroom house in its kitchen, living space, storage and overall square metres.

What is the average floor area of an Irish home?

A current official source for floor area by dwelling type is the CSO’s quarterly Domestic Building Energy Ratings release. As of Q2 2026, the dataset covered 1,367,605 uniquely rated dwellings. It is extensive, but it is not a census of every home in Ireland, so its averages should always be described as averages for BER-rated dwellings.

Across all construction periods and dwelling types, average floor area was 118 square metres. The type of home made a substantial difference. Detached houses averaged 169 square metres, while semi-detached houses averaged 112 square metres. End-of-terrace houses averaged 97 square metres and mid-terrace houses averaged 93 square metres.

The release separates several apartment categories. Ground-floor and mid-floor apartments both averaged 67 square metres, while top-floor apartments averaged 71 square metres. A separate generic apartment category averaged 73 square metres, but it should not be treated as a calculated total for the three floor-specific categories because it is a distinct BER classification.

Homes recorded in the 2025 to 2029 construction band averaged 105 square metres across all dwelling types. This band was only observed through Q2 2026, so it is incomplete. It also contained a different mix of dwelling types: apartments represented 41% of BER-rated homes in that band, compared with 20% of all rated dwellings.

That changing mix is important. A lower overall average does not automatically mean that every type of home has contracted by the same amount. It can also reflect a larger proportion of apartments and terraced properties in the homes being built and rated.

New homes have become smaller since 2016

The CSO’s New Dwelling Completions series links electricity-network connections with Building Energy Rating information to estimate the floor area of completed homes. It therefore measures new completions, rather than the size of existing housing stock.

In 2016, the estimated average size of a completed new dwelling was 166.9 square metres. By 2025, the full-year average was 114.3 square metres. The difference is a 31.5% decline, calculated as 114.3 divided by 166.9, minus one.

The latest partial-year result was slightly higher. The provisional average for Q1 and Q2 2026 was 115.4 square metres. Because this covers only the first six months of the year, it should not be presented as the final annual figure for 2026.

The averages also vary sharply by completion type. In 2025, single dwellings averaged 214 square metres, scheme houses averaged 112 square metres and apartments averaged 69 square metres. For the first two quarters of 2026, the provisional averages were 204 square metres for single dwellings, 112 for scheme houses and 72 for apartments.

The composition of new supply changed over the same period. Apartments represented an estimated 11% of the completion mix used in the size series in 2016, rising to 33% in 2025. Their provisional share for Q1 and Q2 2026 was 30%. The CSO explains that the reduction in average size since 2016 reflects both this change in dwelling mix and a general reduction in size, particularly for single dwellings. For the related supply and purchasing picture, see our Irish new homes statistics on completions, buyers and prices.

The average new-dwelling size index makes the overall movement easier to see. With 2016 set to 100, the index stood at 69 in 2025 and remained at a rounded 69 for the first half of 2026. The raw averages were not identical, however, at 114.3 and 115.4 square metres respectively.

When families have more children than bedrooms

Bedroom counts become more meaningful when they are considered alongside household needs. The CSO’s Census 2022 families publication found that nearly 29,000 families had more children than bedrooms in their home.

Adding the exact categories in Census Table 1.9 gives 28,774 families. This was 2.2% of the 1,279,951 families recorded in the State, while the CSO’s narrative rounds the share to 2%.

The likelihood rose with family size. Among families with two children, 2,167 had fewer bedrooms than children, equal to 0.7% of the two-child group represented in the table. The count was 6,161 among three-child families, or 3.9% of that group.

Among families with four children, 12,515 had fewer bedrooms than children, representing 27.9% of the four-child group. For families with five or more children, 7,931 had fewer bedrooms than children. That was 60.3% of the group, closely matching the CSO’s published rounded figure of three in five.

This is a focused family-level indicator. It should not be labelled as the national overcrowding rate because it compares the number of children with bedrooms and does not apply the broader household-composition rules used by Eurostat.

Rooms per person in Ireland and the EU

Eurostat measures housing space using the average number of rooms per person. Its definition covers qualifying habitable rooms and is broader than the number of bedrooms alone.

In 2024, Ireland averaged 2.0 rooms per person, compared with 1.7 across the EU-27. That comparison helps place the Irish housing stock in a European context, but it does not show how space is distributed within Ireland.

Tenure was associated with a sizeable difference. Owner-occupiers in Ireland averaged 2.2 rooms per person, compared with 1.6 for tenants. Building type also mattered: residents of houses averaged 2.1 rooms per person, while residents of flats averaged 1.4.

These are per-person room measures, not average dwelling sizes. They cannot be converted directly into square metres because rooms differ in size and homes contain different mixes of spaces.

Overcrowding and under-occupation are different measures

The Census persons-per-room ratio provides one view of relative crowding. In 2022, 58,869 occupied dwellings had more than one person per room, equal to 3.2% of occupied dwellings. At the other end of the distribution, 860,015 had fewer than 0.5 persons per room, representing 46.8%.

Eurostat’s overcrowding measure is not the same calculation. It applies a minimum-room requirement based on household size, age and family composition, and it reports the share of people rather than the share of dwellings.

Under that harmonised definition, 5.0% of people in Ireland lived in overcrowded households in 2024. The corresponding EU-27 rate was 16.9%.

Under-occupation measures the opposite type of mismatch: a dwelling has more rooms than the household is deemed to need. In 2024, 66.8% of people in Ireland lived in under-occupied dwellings, compared with 33.1% across the EU-27.

The Irish rate was especially high among older people. Among those aged 65 or over, 86.0% lived in under-occupied dwellings, compared with 47.3% across the EU-27. This can reflect people remaining in a family home after children have moved out, although the statistic itself describes room availability rather than the reason for it.

Ireland can therefore have a relatively low harmonised overcrowding rate and a high under-occupation rate at the same time, while particular families and tenure groups still experience serious space constraints. National averages do not mean every household has enough usable space.

Methodology and sources

This article was prepared from seven primary statistical sources and datasets and reviewed on 28 August 2026. The principal Irish sources were the Central Statistics Office’s Census of Population 2022 Profile 2 and Profile 3 publications, Domestic Building Energy Ratings Q2 2026 and New Dwelling Completions Q2 2026. Harmonised European comparisons came from Eurostat’s EU-SILC datasets on rooms per person, overcrowding and under-occupation.

Census bedroom figures cover occupied private households in permanent housing units on Census Night 2022. They do not represent every dwelling in the State. Census persons-per-room categories are dwelling counts and should not be treated as interchangeable with Eurostat’s population-based overcrowding definition.

BER floor-area figures cover 1,367,605 uniquely rated dwellings as of Q2 2026. They provide a broad view of rated stock but are not a complete census of Irish homes. Averages by construction period can be influenced by the mix of dwelling types, and the 2025 to 2029 band is incomplete.

New-home size figures are based on new electricity connections linked with BER assessment data. The 2025 figures are full-year results, while Q1 to Q2 2026 values are provisional and cover only the first half of the year.

Calculated percentages in this article use the exact published source values and are rounded to one decimal place. The 31.5% reduction in average completed-new-home size compares the CSO’s 166.9-square-metre average for 2016 with its 114.3-square-metre average for 2025. No projection has been treated as an observed result.

How M&I Interiors can help

M&I Interiors can help translate home-size considerations into a practical room plan tailored to an individual property. The number of people using the space, the arrangement of doors and windows, circulation routes, storage and the proportions of each room all influence which furniture will work.

The 2025 averages also show why a single furnishing formula cannot suit every Irish home. A new apartment averaging 69 square metres and a single dwelling averaging 214 square metres have very different constraints. In a smaller home, well-proportioned options such as small sofas, together with suitable storage solutions and clear circulation, can be more useful than simply reducing the number of pieces. Larger homes may need stronger zoning so that additional floor area does not become disconnected or awkward to use.

Through its interior design services for Irish homes, M&I Interiors can help with room layouts, furniture selection and creating a consistent scheme. National statistics provide useful context, but every room should be measured and planned around its own dimensions and how the household uses it.