Mr Brown said he had never been formally approached by the Government on the issue.
Yesterday, Mr Brown urged Aucklanders to accept a controversial plan for a motorway toll or a regional fuel tax to invest in public transport instead of the "basic transport plan" in the budget that contains $3.8 billion of spending cuts to transport over 10 years.
"We face a cost either way, but the cost of doing nothing is worse - the next generations face grinding to a halt," he said.
Mr Brown was optimistic Aucklanders were ready for tolls or a fuel tax and higher rates, saying people were already witnessing better transport and could be sure the new taxes would go directly into transport. But he said if Aucklanders said 'no' to tolls or a fuel tax he would accept the decision.
The mayor also pledged to work to deliver a 2.5 per cent overall rates increase by the end of the budget process. The figure in the draft budget is 3.5 per cent.
Early feedback to the Weekend Herald suggests that Mr Brown has an uphill battle selling the draft budget. There was criticism about rates increases, rising debt, big salaries and a council suggestion that Aucklanders are getting wealthier and can afford higher rates.
Len Brown's budget
• No money for convention centre
• 3.5% average rates rise, but Brown hopes to deliver 2.5%
• Two transport options - tolls/fuel tax scheme or $3.8b of cuts
• $2.5b city rail link proceeds under both options
• Early feedback is critical