UPDATE: The building destroyed by flames in Pialba in the early hours of Monday morning was believed to be a new business set to officially open this morning.

About 3.15am a fire started at Quality Workwear on Islander Rd, destroying the store.

Surrounding business were unaffected by the flames, however some received smoke damage.

Owner of TradeTools, Richard Boase, said he feared his store was destroyed when he received a text early this morning notifying him of the blaze.

"I called my business partner and he was (at Islander Drive) at 4am," Mr Boase said.

"The message said 79 Islander Drive and I thought it was our building."

Mr Boase said he knew Monday was the planned opening day of Quality Workwear and

"They'd been working a lot of and doing a lot of hours to get it up," he said.

"I left here at 6pm last night and they were still packing up so I definitely feel for them because they've certainly been busting their guts."

Acting superintendent James Gill said the fire was being treated as suspicious until the cause of the blaze was known.

"We have the investigators there and they'll go through (the building) today with the aim of finding out what happened," Mr Gill said.

Mr Boase said despite the devastation he was pleased to see surrounding businesses unaffected.

"The engineering in the building is pretty good and it's lucky the fire didn't go any further," he said.

If you have any information regarding fire contact Hervey Bay police on 4128 5333.

EARLIER: A building in Hervey Bay has been destroyed by an overnight fire last night.

Torquay Fire Station acting station officer Dave Crisp said about 3.15am, emergency services were called out to Quality Workwear on Islander Rd where flames were visible.

Mr Crisp said the entire premises was "pretty much destroyed".

"The main fire was in the centre of the building," Mr Crisp said.

"Due to the building fire safety construction of the complex, the adjoining premises were not affected by the fire but were affected by smoke."

Mr Crisp said the flames were extinguished within an hour but emergency services were on scene for hours.

"Police offers have secured the premises and they'll be there today," he said.

The cause of the blaze is unknown and investigations will continue today.

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