About one in eight (12.3%) dwellings in Ireland was vacant in 2016.
The Border (22.6%) and the West (18.4%) had the highest vacancy rates while Dublin (6.2%) and the Mid-East (7.3%) had the lowest.
Leitrim (29%), Donegal (27.4%) and Kerry (24%) had the highest vacancy rates in 2016 at county level. The lowest rates were in all in the Dublin region with South Dublin at 3.6%, Fingal at 5% and Dún Laoghaire-Rathdown at 5.5%.
About three out of every ten dwellings (29.4%) in Ireland in 2016 was built since 2001, with 27.3% of these built between 2001 and 2010. Nationally just 2.1% of dwellings were built since 2011.
Close to a third of all dwellings in the Midland and Border regions were built in the period 2001-2010 while at the other end of the scale in Dublin only 20.8% of dwellings were built in this period.
Dublin has the highest proportion of older houses. Pre-1961 dwellings accounted for 27.6% of the dwellings in Dublin compared to 17.3% in the Mid-East and 20.5% in the West.
The average weekly rent was €200 for households in private rented accommodation, according to the 2016 Census of Population.
The highest average weekly rent by region was in Dublin at €279, while the lowest weekly rents were in the Border at €110 and the Midlands at €127.
At county level the four highest average weekly rents were all in in Dublin: Dún Laoghaire-Rathdown €335, Dublin City €276, Fingal €261 and South Dublin €259.
Only eight counties had average weekly rents above €200 - the four counties in Dublin, the cities of Cork and Galway and counties Kildare and Wicklow.
Leitrim (€99) and Longford (€101) had the lowest average weekly rents.
Nationally, 42% of all dwellings were detached houses in 2016. Nearly two-thirds of dwellings in the Border and West regions were detached houses compared to just 11.5% in Dublin.
At county level, more than 70% of dwellings were detached houses in Galway county, Roscommon and Leitrim. In contrast, the proportion of dwellings which were detached was very low in Dublin City (4.9%), South Dublin (10.5%) and Cork city (11.1%).
Apartments accounted for 12% of all dwellings in Ireland in 2016 but this varied from a high of 25.4% in Dublin to 4.3% in the Border.
Over a third (35.2%) of all dwellings in Dublin city and 23.9% in Galway city were apartments in 2016.
The lowest proportions of apartments were 2.5% in Roscommon and 3.6% in Donegal, Tipperary and Offaly.
In the Mid-East and in Dublin owner occupied dwellings were more likely to have a mortgage or loan than to be owned without a mortgage or loan.
However, in all other regions owner occupied dwellings were more likely to owned outright.
At county level, the highest proportions of dwellings which were owner occupied with a loan or mortgage were in Meath (43.3%), Fingal (41.4%) and Kildare (41.3%).
Cork City (18.1%) and Galway City (21.1%) had the lowest proportions of dwellings which were owner occupied with a loan or mortgage.
Nationally 29.3% of dwellings were rented in 2016, with the highest proportions in the cities of Galway (48.5%), Cork (45.2%) and Dublin (44.2%).
The lowest proportion of rented dwellings were in Galway county (20.8%), Meath (21.6%) and Roscommon (21.9%).
There were 14,446 new dwellings completed in 2017, compared to 4,911 in 2012.
Nearly six out of every ten new dwellings built in 2017 were in Dublin or the Mid-East region, with 38.8% of all new dwellings in Dublin and 20.4% in the Mid-East.
The counties with the largest number of new dwellings completed in 2017 were Dublin (5,602), Cork (1,402) and Meath (1,108). Less than 100 new dwellings were completed in 2017 in Leitrim, Longford and Carlow.
Three out of every ten new dwellings completed in 2017 were single units, (i.e., separate detached houses). The Midland region had the highest proportion of single houses at 70.1% while Dublin had the lowest at 5.4%.
At county level, just over 80% of all new dwellings built in Laois and Kilkenny were single units.
The average price for new residential dwellings in 2017 was €345,206. The highest regional price was in Dublin at €446,782 with the lowest in the Border at €159,758.
The highest average prices for new dwellings at county level were in Dún Laoghaire-Rathdown at €649,736 followed by Dublin City at €434,365 while the lowest prices were in Leitrim at €130,584 and Cavan at €138,836.
Average prices for existing dwellings in 2017 were lower than for new dwellings, a reversal of the pattern in 2012.
The average price for existing dwellings in 2017 was €259,548 with the highest regional price in Dublin at €424,255 and the lowest in the Border at €127,318.
The highest prices for existing dwellings at county level were in Dún Laoghaire-Rathdown at €585,306 followed by Dublin city at €414,540 while the lowest prices were in Longford at €98,094 and Leitrim at €107,347.
Average prices of new dwellings increased by 12.3% each year between 2012 and 2017 while prices of existing dwellings rose by 4.8% each year.
Westmeath had the highest annual percentage change in new dwelling prices at 14.6% between 2012 and 2017 while there were price decreases in Galway and Tipperary of just over 1% each year over the same time period.
The highest annual percentage change in existing dwelling prices was in Laois at 9.3% while prices decreased in Limerick City by 2.7% each year.
Air quality was monitored at 14 stations across the country during 2017. In Ennis the value of PM10 was greater than 50 μg/m3 on nine days during 2017, while Rathmines exceeded this limit on five days.
The highest daily maximum was in Rathmines at 103 μg/m3 followed by Castlebar at 97.
The highest annual mean value for PM10 during 2017 was the South Link Road in Cork at 17 μg/m3 followed by Ennis at 16, while the lowest annual mean values were Kilkitt at 8 and the Phoenix Park at 9.
The Border region had the highest proportion of household waste collected as mixed residual waste, (i.e., kerbside black bin collection) in 2016 at 57.7%, while the lowest proportion was in the South-West at 44.7%.
The counties with the highest proportion of household waste collected in black bins were Monaghan (65%), Donegal (64%) and Longford (60.8%).
Kerry (34.8%), Fingal (35.1%) and Galway City (35.5%) had the lowest proportion of household waste collected in black bins.
There was a large variation across Ireland in the proportion of household waste collected in kerbside recyclables (i.e., green bin, brown bin and glass) from a high of 40.3% in Galway City to just 9.8% in Westmeath.
There was also a wide range in the proportion of household waste brought to bring banks and civic amenities in 2016, varying from 32.5% in Kerry to 7.1% in Cork City.
There were 558 private cars per 1,000 persons aged 17 and over in Ireland in 2016, an increase of 18 per 1,000 since 2011.
The South-East region (616) had the highest rate of private car registrations per 1,000 people aged 17 and over, while the Dublin region (496) had the lowest.
At county level, the highest rates of private car registrations were in Roscommon (645), Carlow (637) and Wexford (635). The counties with the fewest cars per 1,000 people aged 17 and over were Dublin (496), Louth (522) and Donegal (524).
The private car registration rate increased in all counties between 2011 and 2016.