Half of the 108 intermediaries that took part in the survey predicted growing levels of buy-to-let business during the period, with 46% expecting remortgage activity to grow as well.
Brokers also predicted a 44% increase in next-time buyers although only a third thought first-time buyer business would increase.
Meanwhile 49% of intermediaries reported that mortgage market conditions improved during the third quarter compared to 14% who thought that conditions in the sector worsened. The remaining 37% said that conditions remained unchanged.
John Heron, chairman at IMLA, said: “This positive attitude from intermediaries is a reflection of the general improvement seen recently in the mortgage market.
“The pick-up is slow but market conditions are gradually improving, particularly in the buy-to-let and remortgage markets.
“Intermediaries can provide invaluable advice and support to anyone seeking a mortgage whether first-time buyer, home mover, buy-to-let investor or remortgage.
“There has been a recent perception that mortgage deals are not available. This research indicates that good deals are out there and that intermediaries are strongly placed to help find them.”