Sky News reports that Haché, which has four sites across the capital, is working with Interpath Advisory on an accelerated auction process.
Prospective buyers have begun being sounded out in recent days, according to insiders, with the group said to be exploring a range of sale or investment options.
Haché is part of The Hush Collection, which is led by Jamie Barber and Ed Standring, and launched its first site in Camden in 2004.
In a statement provided to Sky News, the group said it had received ‘considerable interest’ in its remaining estate after selling its sites in Clapham and Shoreditch last year.
“Following the sale of two of our sites last year, we have received considerable interest in our remaining sites and as such, we have recently appointed advisors to help us explore our strategic options in relation to them,” a spokesperson said.
Haché currently operates sites in Balham, Camden and Chelsea under its Parisian-inspired burger concept.
A single restaurant in Kingston is branded as Haché Brasserie.
Whilst the brasserie menu retains a tight selection of the steak burgers which the original brand was known for, it expands this with a range of modern European-style brasserie dishes.
Last year, Barber and Standring said they planned to focus on expanding the Haché Brasserie concept following the success of the Kingston site and relaunched their burger restaurant in Holborn under the all-day brand.
However, the group has subsequently flipped that restaurant again and it now operates as Hush Holborn.
The Hush Collection also encompasses Brazilian restaurant brand Cabana, which has three sites across London.
In November last year Barber said the group was ‘considering options and opportunities’ having cleared its bank debt and built up a ‘significant war chest’.