Inside Festival 2015: a converted stable home featuring a treehouse-like bedroom and a hotel featuring a sculptural timber entrance are among the first category winners at this year's Inside Festival awards (+ slideshow).

Revealed today as part of the Inside World Festival of Interiors in Singapore, the winners also include a Bangkok restaurant and a Singapore lifestyle store. Five more winners will be revealed tomorrow, and each category winner will be put forward for the title World Interior of the Year, which will be selected on Friday.

Dezeen is media partner for the Inside Festival 2015. The event continues at the Marina Bay Sands hotel and conference centre in Singapore until 6 November, coinciding with the World Architecture Festival.

Here are the details of today's four winning interior projects:

Hotels: Hotel Hotel Ground Floor Interior, Canberra, Australia, by March Studio

Australian office March Studio used thousands of pieces of recycled wood to create a sculptural entrance for Canberra's Hotel Hotel, which is part of a mixed-used development in the city's arts and culture precinct. Supported by steel rods that run from floor to ceiling, the timber creates irregular patterns through the space.

Bars and restaurants: Vivarium, Bangkok, Thailand, by Hypothesis

An converted warehouse is the setting for this Asian-fusion restaurant by Thai studio Hypothesis. The architects reused elements from around the site, including iron doors, steel pipes, and tree roots. They combined these with new red-painted elements, designed to reference the colouring of the masala spice, and hanging plants.

Residential: Tree House, Rome, Italy, by MdAA Architetti Associati

MdAA Architetti Associati transformed what was left of an old stable to create this home for a pair of fashion designers in Rome. To give the couple a private bedroom without compromising the open-plan nature of the space, the architects created a treehouse-like room floating above the ground floor, featuring a stained-glass window facing up to the sky.

Retail: KKi Sweets and the Little Drom Store, Singapore, by Produce Workshop

Located inside Singapore's School of the Arts, this project involved creating two shops – one selling art and design products, and one offering a mix of sweet treats and homeware. Produce Workshop's design involved creating a porous trellis, which integrates tables and shelves.