Perth consumers will miss out on extra shopping time this Monday public holiday after an application for extended trading was knocked back.

Four months ago the Chamber of Commerce applied for longer opening times for the upcoming long weekend, but the State Government has blocked the request.

Alfie Gryg opens his jewellery seven days a week, but will only be able to open between 11am and 5pm on Monday.

“They haven’t gone to the average businessman and gone, ‘look, what do you want’,” Mr Gryg said.

The Chamber had asked for extended hours in the CBD to trade from 8am to 9pm.

Last year, CBD stores were able to open from 8am to 6pm.

The Government defended its decision, saying shoppers don't want the extra time.

But critics say the trading hours refusal is a step backwards.

“The government should get on with running schools and hospitals and sorting out state finances, and get out of the way of businesses trying to open their doors to customers,” advocacy director Cath Langmead said.