Retirement village operators do not currently pay a capital gains tax on the sale of the occupancy rights for the units.
While Labour's leader Jacinda Ardern has said its tax working group would look into a capital gains tax and if it recommended one, it would not take effect until after the 2020 election, a possible coalition partner - the Green Party - has said it would be a priority.
While it is not clear whether a capital gains tax would apply to the sector, UBS New Zealand analysts warn house prices could be negatively impacted by a change in government.
"Not only do higher interest rates and slower growth put downward pressure on house prices, but Labour, Greens and NZ First all have aggressive policies to lower house prices," they said in a note.
According to UBS, house prices could fall as far as 5 per cent by the end of 2018, below its current forecast of 4 per cent house price inflation.
"Given these assumptions, we expect the majority of stocks to fall slightly as a result of a change in government. In particular negative residential house price inflation does not bode well for the aged care sector," they said.
While Gordon agreed that the sector is "very much exposed to the fortunes of the housing market", he said up to a 10 per cent fall in house prices would have a negligible impact.
Retirement village operators tend to price the units at around half-to-two-thirds the median house prices in the areas they are located, providing them with margin room to hold pricing, said Gordon.
On top of that, demand is not waning. "The number of elderly people reaching that stage (where they might move into a unit) is not falling, it is growing," he said.
According to government data, there is a 90 per cent probability that the 700,000 people over the age of 65 in 2016 will increase to 1.32 million to 1.42 million in 2043, and to 1.62 million to 2.06 million in 2068.
Currently, some 12 per cent of the population over 75 live in retirement villages "and if that increases by only a couple of percent then these guys aren't building enough," said Gordon.
There are five listed companies on the New Zealand stock exchange: Summerset, Ryman, Metlifecare, Oceania Healthcare and Arvida Group, representing around 5.5 percent of the total $127 billion of equity on the stock exchange.
Oceania Healthcare has jumped 22 per cent since listing last May, while Arvida has gained 26 per cent since its December 2014 initial public offering. While Metlifecare is the second largest retirement village operator, Gordon said its portfolio is fairly mature and their development is smaller and so it has the lowest margins of the three largest.