Some of the damage at the newly-reopened Victoria Square, which crown agency Ōtākaro says amounts to more than $100,000.

Skaters have caused "well over $100,000" damage to a Christchurch square that reopened after a multi-millon dollar revamp weeks ago.

That is according to Crown agency Ōtākaro, which says skaters removed 46 brass "skate fins" designed to prevent them grinding on the new stone block walls.

"It is deeply disappointing that after all the time, money and effort that has gone into this much-loved space that someone would willingly damage it," Ōtākaro limited development manager John O'Hagan said.

Ōtākaro A removed anti-skating device at Victoria Square.

"These skate fins are easily identifiable and anyone who sees one or knows anything about this senseless act should report it to police."

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According to Ōtākaro the damage was done on Monday night.

ALDEN WILLIAMS/STUFF The Bowker fountain at the recently re-opened Victoria Square.

O'Hagan said it was not yet known how long it will take or how much it will cost to repair the damage.

"We expect the repair work will take several weeks and cost well over $100,000. Replacement stone will need to be cut and in some cases etched to repair the damage to the new Parerau artwork behind the Queen Victoria statue.

"High-quality materials were used in Victoria Square because we know it is an important place for people. This sort of selfish act only spoils the experience for those wanting to visit this restored space."

Victoria Square, near the corner of Colombo and Armagh streets, reopened on March 9 after a 13-month, $7.6 million restoration.

A security guard would guard it at night while a permanent solution was considered, Ōtākaro said.

It was the second attack on Victoria Square by vandals since the park reopened.

Just hours after it reopened the historic fountain in the newly-opened Square needed to be checked for damage after it was vandalised.

The Bowker Fountain was a foamy mess on the Saturday morning after the opening. The culprit left behind one clue – an empty box of Persil washing powder.

Adding detergent to fountains can badly damage them and flushing the detergent out can cost hundreds of dollars and cause major drainage issues.