For longer stays, consider the newly opened five-star ADGE Apartment Hotel, a collection of two-bedroom, two-bath, open-plan apartments located in the creative hub of Surry Hills on the southern fringe of the CBD.

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That means no-one knows where they are staying - a one-star apartment or a three-star hotel - until they get there.

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However, the entire landscape has changed and hundreds of high-rise hotel buildings, apartment blocks and restaurants have mushroomed in the area.

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The best known extended-stay apartment hotel is AKA, which has nine locations in key markets throughout the US, including Philadelphia, Washington DC, Virginia and four in New York.

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Many companies are forgoing luxury hotel stays in favour of integrating budget-level hotels or apartment stays into their travel policies.

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The unusual condo apartment combines portions of the century-old Beaux-Arts hotel with a new loft-like rooftop construction with skylights and an angled wall of glass.

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Roughly one-third complete, it will boast 200 retailers, office space, a luxury hotel and apartment complexes with different levels of design, amenities and pricing to appeal to three different segments of the market.

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The gilded NoMad, drawing design inspiration from its 1905 Beaux-Arts structure and designer Jacques Garcia's former Paris apartment, boasts a Parisian-style restaurant flowing into the lobby of the hotel and furniture modeled after French originals.

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