The company had previously announced plans to open on 29 November, however that date has been revised.
In a note to members, Costco Whole Australia Managing Director Patrick Noone said “we regret the delay and apologise for any inconvenience”.
“Although the warehouse itself has progressed well, and despite the best efforts of our contractors, we cannot open until the roadwork upgrades and related services completed,” he said.
“For this reason, we will be delaying the opening until the new year, with a date to be announced.
“We would like to assure you that your membership will be valid for 12 months from the date we open early next year.
“In the meantime, you are welcome to use your membership at any Costco location around the world, in Australia and also in North Lakes, Brisbane.”
Costco has said recent wet weather had delayed the completion of associated roadworks near the site.
The completion of associated roadworks before the store’s opening is a condition of local and state planning approvals.
The first sod was officially turned on the project in June.
Ipswich residents have already begun embracing the US giant, with a ‘Qld Costco Geeks – Bundamba Ipswich’ Facebook group having grown to almost 2,800 members in recent months.
Mr Noone has previously said Costco Bundamba was a $50 million project that would generate 90 jobs during construction, with 280 full-time and casual positions to follow once it was completed.
As well as the Costco store, the development in the $1 billion Citiswich Business Park includes 825 car parks and a 24-hour service station.
“We are delighted to be a part of the strong economic growth story in south-east Queensland and believe our outlet will boost economic activity and further activate Citiswich Business Park,” Mr Noone said.
Costco is the latest business to join the $1 billion Citiswich Business Park.