New American owners Gillett and Hicks met planners last weeek and underlined their ambition to increase capacity of the new ground to 76,000.
Liverpool FC Chief Executive Rick Parry today insisted construction deadlines would not change.
News of massively improved plans will delight Reds fans.
But any proposal to significantly increase seating would mean the club had to submit a fresh application.
That would go before Liverpool planners - and could ultimately be "called in" by the government for scrutiny before any decision is made.
A delay could hit the wider regeneration of Anfield, which is tied in with the stadium project. Euro cash to fund the restoration of Stanley Park and improve the community around the new ground must be spent by the end of next year at the latest.
A spokesman for Liverpool council said: "If there was an increase in [stadium] numbers, it would require the submission of a new planning application."
Council leader Warren Bradley said: "It is early days yet. We met Liverpool last week and they did not say they wanted to change the scheme dramatically.
"But if that is what LFC as a commercial business wants to do, the council has to facilitate it.
"One of our greatest concerns is the people of Anfield and Breckfield. The cash we have drawn down for the project should be spent and not lost, and I look forward to a meeting with the new owners to discuss the matter further."
Council chief executive Colin Hilton said: "I would re-emphasise the need to meet with the club's new owners again and talk through the stadium issues.
"Irrespective of any new capacity, the development is something we wanted to discuss in terms of transport infrastructure and easing congestion.
"We want to explore the possibility of the development of the Bootle rail branch line with Merseytravel and encourage the new owners to take a wider view of regeneration in the area."
Liverpool's current planning application was approved in July 2004 and the government opted not to call it in. The club hopes the existing permission will cover any increase in size.
But Cllr Flo Clucas, executive member for economic development, said: "If there was a completely new planning application and they were looking to increase the size, the Secretary of State could call it in.
"That would be a matter for the Secretary of State and the club to deal with.
"Our concern is the regeneration of Anfield, which is dependent on the club completing the stadium."