They have now applied for permission to make various alterations inside and out, including the repair and replacement of shopfront windows and new external lights awnings, canopy and signage.
The plans also include a new entrance on King Street and solar panels on the roof.
The new showroom is expected to cover 3,000sqft, with more space on the second floor for storage and offices.

Pictured: Burton left Jersey’s high street after nearly 90 years in 2020.
Announcing the plans last year, Managing Director Jeffrey Chinn said the new showroom would “echo our remarkable values and retain the air of elegance Hettich is renowned for”.
He added that they were “excited about moving into a new era”.
The former Burton building was built in the early 1930s in the art deco style.
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Hettich plans to make former Burton store jewel in the town
Pictured top: Hettich Managing Director Jeffrey Chinn. (Jon Guegan/JEP)