These related to noise and vibration mitigation, details of materials and layout of the South Landing Building and counter-terrorism measures.
The trust has refined plans to reduce the impact of construction, including noise, and has promised to supply four female toilets, one male toilet and three urinals, and one wheelchair accessible toilet. It says this is enough public toilets for around three times the number of bridge visitors expected at peak - although Thames Central Open Spaces, which opposes the bridge, says these toilets will be insufficient for the number of visitors expected.
The colour of stone being used in construction has also changed from brown grey to a lighter quartz grey, after councillors raised concerns that the bridge design was "bleak" and offputting to visitors.
Although the counter-terrorism measures to be taken by the organisation are largely being kept secret, it was revealed last year that behaviour on the bridge would be carefully policed. Visitors' mobile phone signals will be tracked, and banned items can be confiscated.
Local politicians attending the planning meeting continued to raise concerns about the Garden Bridge, with Vauxhall MP Kate Hoey calling for it to be put on hold while the business case is being scrutinised.
Bee Emmott, executive director of the Garden Bridge Trust, said: "We are making strong progress on the project with 80 per cent of the Lambeth conditions signed off and over £145m raised towards building the bridge. It's a really exciting time for the project with real momentum building. We can't wait to begin construction this summer."
A further £1m has been raised toward the cost of building the bridge this month through private donations raised at a Glitter in the Garden event in Battersea.
Nearly 500 guests attended the event, bidding for luxury prizes such as a personal styling session with Stella McCartney, and a game of table tennis with mayor of London Boris Johnson.
The event is set to be held every second year, trust chairman Lord Mervyn Davies said. Funds raised would both paid for the bridge and later on help pay for the bridge's ongoing operating costs.