A folded steel staircase supported by criss-crossing rods connects the two levels of this duplex apartment in Tel Aviv, recently renovated by local studio Toledano + Architects (+ slideshow). More about Toledano + Architects inserts suspended steel staircase into Tel Aviv penthouse
Portuguese architect Eduardo Souto de Moura reconstructed a 19th century townhouse to create this Porto guesthouse, which is arranged around a pair of secluded courtyards (+ slideshow). More about Porto flat by Eduardo Souto de Moura features a pair of tranquil courtyards
Traditional Japanese interiors and natural landscapes influenced the design of this apartment in Moscow, which was recently renovated by local studio M17 (+ slideshow). More about M17 adds faceted wooden wall to renovated Moscow Apartment
A one-bedroom flat in a 1960s housing block in northwest London has been updated with modern fittings and furniture in this project by designer Adrian Manea (+ slideshow). More about Adrian Manea refurbishes Modernist flat in London's Belsize Park
Bespoke joinery and minimal materials feature throughout the interior of this London apartment, recently transformed into a contemporary home by local architecture practice MWAI (+ slideshow). More about MWAI adds copper fixtures and marble surfaces to Victorian apartment in London
Stainless steel surfaces are paired with solid oak cupboards inside this Amsterdam apartment, which was recently renovated by Dutch designer Frederik Roijé (+ slideshow). More about Frederik Roijé designs minimal interior for Amsterdam apartment
Inside Festival 2015: Massimo d'Alessandro explains how his studio MdAA transformed an old stable into an apartment by creating a treehouse-like room raised from the floor on a single column (+ movie). More about MdAA creates elevated bedroom "like a treehouse" inside Rome apartment
The two floors of this Kyiv apartment are connected by a long slide, which KI Design Studio added to make being at home more fun (+ slideshow). More about KI Design Studio adds slide and plant-covered wall to Ukraine apartment
PKMN Architectures has renovated an apartment on the Spanish coast, adding modular storage walls that spin around to create extra bedrooms for guests (+ movie). More about Rotating walls offer alternative layouts for MJE House by PKMN Architectures
Marble bathrooms and simple furnishings complement period mouldings and restored wooden floorboards inside this waterfront Lisbon apartment recently renovated by local office Rar.Studio (+ slideshow). More about Rar.Studio adds marble bathrooms in renovation of 19th-century Lisbon apartment
Anne Rolland Architecte has transformed a ground-floor space in a 17th-century Parisian townhouse into a studio apartment with a secret underground room. More about Studio apartment in Paris by Anne Rolland Architecte has a hidden converted slurry pit
A copper-clad box for storing, exhibiting and selling paintings will stand in the centre of this Hong Kong apartment, designed by Penda for one of China's biggest art collectors (+ slideshow). More about Penda designs copper "suitcase" to store paintings for Hong Kong art collector
A curved wooden staircase connects the two floors of this penthouse apartment in Brussels, which architecture office B-ILD converted from two flats (+ slideshow). More about B-ILD combines two apartments in Brussels to create live-work penthouse
Chinese architects Lee Chul and Liu Jing punched through the partitions of this small Beijing apartment to create a more open-plan layout with only one door (+ slideshow). More about Lee Chul and Liu Jing knock through walls to open up spaces in a Beijing apartment
Design Haus Liberty has converted a building with an triangular footprint in London's Shoreditch into rental apartments that fold around awkwardly shaped internal walls (+ slideshow). More about Design Haus Liberty squeezes three flats into angular period property in east London
Paris studio Atelier 37.2 has added a multifaceted wooden volume to an apartment in the French capital to house two shower rooms. More about Atelier 37.2 installs sculptural wooden bathroom inside Haussmann-era apartment
Hungarian firm Position Collective has renovated a Budapest studio flat, designing a furniture and storage system that caters for temporary occupants booking via Airbnb (+ slideshow). More about Position Collective tailors Budapest apartment towards Airbnb guests
Architects Anna and Eugeni Bach have suspended a desk from the ceiling of this renovated Barcelona apartment so residents can use its mezzanine level as a study (+ slideshow). More about Desk hangs from ceiling of Barcelona apartment by Anna and Eugeni Bach
A wooden bridge-like corridor connects a master bedroom to a walk-in wardrobe on the mezzanine level of this apartment in the Taiwanese city of Kaohsiung (+ slideshow). More about Taiwan apartment renovation by Hao Design includes a new floor with house-shaped doors
London studio Emrys Architects has converted a pair of warehouses in London's Covent Garden into apartments, including a pair of penthouses slotted underneath the original pitched roof (+ slideshow). More about Emrys Architects creates six homes in converted Covent Garden warehouses