The real estate developers are likely to cut property prices on subdued demand, it said.
"Fitch Ratings expects property sales in India to fall by at least 20-30% in 2017, owing to disruption caused by demonetisation and general caution on the part of buyers," the agency said in a statement.
"Home-builders already have high levels of unsold inventory and are likely to cut selling prices as demand weakens."
Fitch Ratings expects risks to home-builders to rise further this year, with leverage likely to increase and liquidity to tighten.
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"We expect home prices to decline this year because demand for residential property has weakened significantly in the fourth quarter of 2016, following the demonetisation of large denomination notes in November last year," the statement said.
Demonetisation has made it harder for home buyers to use undeclared wealth for property payments.
The number of residential property units sold in the fourth quarter of 2016 fell by 44 per cent yoy, dragging down overall units sold in 2016 by 9 per cent, as per data compiled by Knight Frank Research. The volume of new units launched declined 61 per cent year-on-year.
The NCR is also known to have the largest cash-based economy in the country and therefore, demand is likely to suffer more from the currency demonetisation than other regions, it observed.
Fitch expects demand for homes in Chennai and Pune to be less affected by the downturn as unsold inventory is the lowest in these cities at around 6-7 quarters of sales.
"Although property construction was hampered for a few weeks after the demonetisation announcement, we understand that most home-builders have been able to work around practical issues related to making payments to suppliers and contractors, and that construction has since resumed.