Perth fashion designer Poppy Lissiman is the latest casualty of Western Australia's high manufacturing costs.

She's produced her fashion label in Perth's suburbs since 2008 but the clothing line is now on-hold indefinitely.

"It's just getting too expensive unfortunately," she said.

"You just can't compete with people who are getting their stock manufactured in Asia, China, Indonesia, Bangladesh, India."

Ms Lissiman is now focussing on running her Claremont boutique but she says she'll look offshore to resume production again.

"As soon as the dust settles a bit and I can work out what to do next and line everything up, I'll start manufacturing out of China."

The local industry doesn't have precise figures, but it estimates almost half of Western Australia's 250 designers have moved manufacturing overseas.

Perth Fashion Festival's Aleksanda Gajda says manufacturing overseas has become increasingly popular for WA designers due to rising costs and competition from other retailers, particularly department stores.

"We've certainly noticed perhaps in the past two or three years there's been a growing trend towards designers starting to manufacture offshore which brings with it it's own challenges and risks," she said.

Those challenges include overseas companies which can require minimum orders in the thousands.

Designers also say it would be hard to monitor the quality of garments without regularly flying to Asia, which would be costly.

Perth-based designer Garth Cook has considered moving offshore but instead cuts costs here to stay viable.

"I try and find the best way we can do it," he said.

"I find ways that we can save money.

"If it's cutting the collection ourselves and having it produced, we do all the buttons ourselves, all the hooks and eyes and swing tags, all that kind of stuff, we do in the studio."

Mr Cook says he's determined to keep his label local.

"The reason I started my business here in Perth was because I wanted to," he said.

"I wanted to work with local people, I wanted to be able to go to the manufacturer and have a look at the garments being produced."

The group behind the Perth Fashion Festival has recognised the challenges facing WA's fashion industry.

It's restructured to focus more on supporting and advocating for local labels, beyond the annual festival.

Ms Gajda is concerned designers who don't adapt to tougher financial conditions will be forced to close.

"If they can't keep up with [rising costs] or they can't find the right manufacturer either locally, that does it within a price that's viable for them, or offshore, then the reality is unfortunately they need to fold."

But she's optimistic local designers will pull through the challenging conditions.

"I'm going to be hopeful on it and say that we can maintain a stronger and growing industry here within WA because it's so important," Ms Gadja said.

"It has an onflow onto numerous areas of the sector and businesses here, if we can keep it local that's critical."