The relationship between population change and housing vacancy in Ireland

The prelim results for Census 2016 make it clear that housing vacancy continues to be a serious issue in Ireland.  Given that new housing units grew by only 18,981 to 2,022,895 and population grew by 169,724 to 4,757,976m between 2011 and 2016, one might have expected vacancy to have fallen substantially.  However, housing unit vacancy fell by only 29,889 to 259,562.  Of these 61,204 are holiday homes (HHs), a slight growth of 1,809 from 2011.  On a base level vacancy of 6%, oversupply is 76,984.

Vacancy and oversupply varies geographically as Map 1 demonstrates.  Excluding holiday homes all but three local authorities – South Dublin (4%), Dún Laoghaire-Rathdown (5.7%) and Fingal (5.3%) – having vacancy rates (exc. HHs) above base vacancy.  In several cases housing vacancy (exc. HHs) is running above 10% and four local authorities have rates above 15%.  The issue is particularly acute in the north west.

Map 1: Housing vacancy (exc. HHs) in Ireland

One might expect that the vacancy rate has been declining everywhere, but this is far from the case.  In fact, vacancy has been rising in many EDs.  In Figure 1, each dot is an ED, with each dot above the line representing an increase in vacancy (exc. HHs).  In some cases the increase is quite dramatic.

So, the question is what has led some EDs to increase in vacancy?  Some of it is obsolescence – in any housing market 3-5 properties drop out of use in a year.  Some of it might be properties under-construction and on unfinished estates being completed (and thus counted) but are not yet occupied.  And some of it will be related to population change and migration.

Here, we want to look at the latter since a large number of EDs lost population between 2011-2016, especially those in rural areas (with towns in rural counties growing).

Map 2 shows population and vacancy (exc. HHs) categorised into four classes.

1. (light blue): population decreased and vacancy decreased (687)
2. (blue): population decreased and vacancy increased (705)
3. (red): population increased and vacancy decreased (1497)
4. (light red): population increased and vacancy increased (517)

The relationship we would expect would be classes 2 and 3 – where population decreased, vacancy increased, and where population increased, vacancy decreased.  And that happens in 2022 EDs (out of 3406).  However, in 1204 cases (c. a third), something odd happens: as population increases, vacancy increases (517 cases), or as population decreases, vacancy decreases (687 cases).  In the case of the latter this might be explained by obsolescence and household fragmentation.  We would be interested to hear of other possible explanations.

Without further analysis it’s not possible to determine the causes of this inverse relationship.  However, what the data does show us is that how housing vacancy is unfolding is not universal and there are different social and spatial processes at work.

Rob Kitchin and Martin Charlton

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Displacement in Dublin – some thoughts on Airbnb, vacancy and the preliminary census

Much of the coverage concerning the preliminary Census release from yesterday has focused on vacancy. This has meant distinguishing between those housing units classed as holidays homes in each area and units that are ordinarily vacant. One of the more puzzling statistics to emerge from this distinction is the 190% increase in the number of holiday homes in Dublin city since 2011. In that year, there were 322 vacant holiday houses in the city but those rose dramatically to 937 in April’s census.

What might account for this near trebling in five years? In particular why, in the middle of a housing shortage, is there almost twice as many housing units classed as holiday homes in a dense urban area when compared with five years previously? Speculation with some others on twitter concentrated on the possibility of these being AirBnB properties. I decided to put some focus on this explanation to see if there’s any truth to it.

In recent months there has been a number of online features concerned with how AirBnB (a company which matches bodies with beds across the world) might be affecting rents. If people are renting their city property through AirBnB for much of the year, how might this affect people seeking to live and work in the city full time? For example, in a number of North American cities there are concerns that full-time AirBnB rentals are displacing residents (e.g. see here or here) who are in lower paid jobs and subject to ever-increasing rents. Some city authorities are coming under pressure to restrict the use of full-time rentals through the company. A property owner can make far more renting out short term lets to passers-by than s/he can from locals who are seeking merely to continue living in a city they work and have a life in.

There is a vital politics to this displacement where AirBnB rentals are pricing people of lesser means out of particular areas of a city bustling with tourists. It is an extreme example of gentrification by displacement, almost making the popular term redundant in its bluntness. The uneven geographies of AirBnB rentals hits home for many in this city too.

In Dublin in June, the city council raised the prospect that full-time AirBnB rentals in Temple Bar, a particular zone of intense tourist activity, would be subject to planning permission. The Council argued that a particular property in the neighbourhood was effectively a material change of use from residential to commercial. It insisted of course that this ruling was “site specific” and did not cover the entire Temple Bar area. The prospect of an imposition of a change of use for the area as a whole is remote though: this seemed like a shot across the bow.

Luckily for us, InsideAirBnB allows us all access to data for rentals across a large number of cities to determine if the company is facilitating displacement. I took the January 2016 data from this site and, aside from knowing the first names of each of the renters, the database contains a number of interesting data.

There are 3,772 properties in the AirBnB database in the four local authority areas. Of this number, 3,116 (83%) are in the Dublin City Council area. 1,222 or 39% of this subtotal are for rent, according to the dataset available under Creative Commons, for 300 days or more per year. The heatmap below (Map 1) shows that near-year long rentals are broadly clustered within the Temple Bar, Cow’s Lane and north Docklands areas. Those rented 365 days per year (249 properties) are distributed slightly differently. They are by no means overlooking the splendour of Dublin Bay.

Map 1: a heatmap of the 1,222 properties available for 300 days or more on AirBnB. Data: InsideAirBnB and OSM contributors.

They are scattered across the city with some clusters in Drumcondra, Rathmines and Portobello. Map 2 below shows the distribution of these year-long AirBnB properties across the Dublin City area, Map 3 shows the distribution of entire house/apt available for rent for 300 plus days a year (as opposed to a room in an already occupied dwelling).  It is not beyond the realm of possibility therefore that the >300 days per annum rentals in this database includes a figure of 937 holiday houses recorded in the census. In fact, there are 934 properties rented out for 335 days or more per annum in the database. If you spent the month of December in your own city centre apartment, and rented it out for the remaining 335 days of the year, you might well be among the 937 recorded in the Census.

Map 2: Year-long AirBnB rental properties (n=249) in the Dublin city area. Data: InsideAirBnB and OSM contributors.

Map 3: 300 plus days per year of entire housing unit /apartment for rent on Airbnb. Data: InsideAirBnB and OSM contributors

But this is a numbers game. We’ll have a better sense of the distribution of the city’s holidays homes when the more extensive data release begins in April 2017.

Eoin O’Mahoney

 

 

Why does Dublin City have 21,781 vacant units?

For the past couple of years the housing discourse for Dublin city has been one of housing shortages and a homeless crisis. The preliminary census figures published yesterday reveal that while the vacancy rates (exc holiday homes) for South Dublin (4%), Dún Laoghaire-Rathdown (5.7%) and Fingal (5.3%) are below a base vacancy level of 6% (in a ‘normal’ market we would expect c.6% of stock to be vacant due to selling/rental gaps, deaths, etc), suggesting that they have housing undersupply, Dublin City Council has a vacancy rate of 8.6% (exc. holiday homes).

In total DCC has 21,781 vacant units (20,844 exc holiday homes).  On a base vacancy of 6% (14,544 units) that suggests an oversupply of 6,300.

In other words, there is something pretty odd going on given the homeless rate has been increasing, large numbers are on the housing waiting list, and there’s a widespread belief that the city desperately needs to build housing.

So, what constitutes these 6,300 excess vacant units?

It’s somewhat difficult to know without visiting them and doing an on-the-ground survey, but let’s start with looking at the geography of vacancy in DCC.  Map 1 shows the % vacancy in the city minus holiday homes, and Map 2 shows change in the number of vacant units since 2011.

Map 1: DCC vacancy rates (exc holiday homes)

 

Map 2: DCC vacancy change 2011-16

In Map 1, all the areas not shaded pale yellow has a vacancy rate (exc. holiday homes) above 6% base vacancy.  Much of the city centre and to the south have rates above 10%, and two EDs have rates above 20% (Mansion House B, Pembroke West B).  In Map 2, the blue areas have seen vacancy rates decline between 2011 and 2016, whereas red areas have seen an increase.  Interestingly, a number of areas have seen quite large increases in vacancy, especially within the canals near to the city centre, Ballsbridge and Rathmines.

Here’s some speculation as to what constitutes the excess vacancy:

• some unreported airbnb/similar stock;
• some second homes (used during week, but primary residence recorded as somewhere else);
• some investment stock left empty;
• some bedsits not yet converted after change in regulations that made them illegal;
• some inner city obsolescence.

I’d be interested to hear about other possibilities.

Whatever the reason for the vacancy, it appears that this stock is not presently available to the market and therefore there continues to be a shortage of housing in the capital.

Rob Kitchin