With immediate effect, banks and developers will not be allowed to offer loans on homes under construction where the borrower need only put down as little as a 5 per cent cash downpayment and defer repayment of the principal until after building is completed.
The government also said it will reinstate its "confirmed list" of land sales in the first half of 2010 and increase the supply of land available to developers.
"Given the current market conditions, the government has decided to adopt several measures to temper the exuberance in the market and pre-empt any speculative bubble from forming," National Development Minister Mah Bow Tan said in Parliament.
Singapore's actions come as some Asian governments warn of speculative bubbles in real estate markets and said they may take steps to cool an overheated market Mah's announcement in Parliament caused property stocks to fall sharply.
CapitaLand dropped 15 cents to S$3.72 (S$1 = RM2.45), Keppel Land eased 17 cents to S$2.66 and City Developments was down 84 cents to S$10.24.
Home prices in Singapore have soared in recent months, with transactions hitting record monthly highs, as buyers flock to showrooms for new apartments.
"We are currently seeing signs of heightened speculative activity, although the level of speculation is not yet extreme," Mah said.
Song Seng Wun, regional economist at CIMB, described the Singapore government's action as a further sign that authorities are becoming concerned about the rise in home prices, but added the measures themselves appear relatively muted.
"It's a tentative step ... more significant would be if the government raises the 5 per cent downpayment," he said.
"It looks like the government is going down the softly-softly route first before seeing if it needs to bring out the big stick."
