A senior architecture lecturer says the future of Wellington's Town Hall should be considered - along with its heritage.

Mayor Tory Whanau wants to consider changing heritage laws, now the building's earthquake rebuild has blown out to a potential cost of $330 million.

Dr Elizabeth Aitken-Rose says sometimes buildings are saved that shouldn't be.

But she says New Zealand also tends to knock everything down and start again.

"If you think about the Wellington Town Hall, it's not just what it is or what it was- but the purpose it actually serves in the community going on."

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