Carried out by Westminster City Council (WCC) in the Hallfield Estate in Paddington, the project was aimed at making it easier for people who live in flats to recycle.
With over 85% of its population living in flats, Westminster was keen to encourage recycling on such estates.
And after finding that recycling rates on the estate tripled from one to three tonnes, the council has said the converted chutes will now remain a permanent fixture.
Cabinet member for street environment at WCC Alan Bradley explained the need for the trial. He said: A typical family in Westminster produces half a tonne of waste a year and half of that is recyclable, so to make a difference it became apparent that we would have to find a way to make it easier for people in flats to recycle.
Special recycling bags were issued to residents to help separate their waste, with advice to bundle their paper and glass together.
Hallfield Estate village manager Siobhan McAuliffe said: It doesn't surprise me that the amount of rubbish now being recycled has gone up so much. It was clear that residents across the estate were keen to recycle, but previous methods were always inconvenient. Now recycling fits into their daily routine."
The council now plans to roll out similar systems to other estates and is looking at door-to-door collections where chutes are not available.