Singapore Airlines (SIA) will spend $100million - five times more than the $20 million it originally wanted to spend - to revamp its airport lounges around the world in a bid to maintain its edge in an increasingly competitive field.

The announcement on Tuesday came after SIA unveiled its new-look lounge in Sydney, the first of 15 lounges to be refreshed over the next five years.

Plans are now underway to roll out the new "home away from home" lounge concept in London, Hong Kong and Singapore (Terminal 3) next year, said SIA in a statement. The new look, developed by local firm Ong & Ong, is aimed at making premium passengers feel at home with fittings that replicate the living and dining room, as well as, the kitchen.

The lounge boasts more personal work spaces inside the workstation pod seats and new SIA-only high-back armchairs. Passengers will also be able to get a taste of home with the lounges serving local dishes like laksa and mee siam, while enjoying personalised service.

The lounge will also features art pieces that showcase Singapore and the country of departure. Mr Tan Pee Teck, SIA's senior vice-president for product and services, said: "Each space is thoughtfully designed to create the ambiance of home that is familiar and comforting, adding to the warm, authentic and personalised service that Singapore Airlines is well known for."