Luxury residential interior architecture and interior design, Melbourne

Studio del Castillo is an award-winning Melbourne interior architecture and interior design studio creating luxury homes for private clients. Led by founder Penny del Castillo, we design new builds, whole-home renovations and penthouses across Toorak, Hawthorn, Malvern and Melbourne’s inner east, from first layout to the final piece of art.

Designing some of Australia’s best-known hotels taught us how a space should feel to live in. We bring that precision home.

In the world of interiors, we’re mind readers.
We nail your unspoken briefs. We spot your unseen issues.
And we see the end, right from the start.

We look inside your head to unlock what’s inside your heart.

Our Services About the studio Penny del Castillo

Living In The Sky Penthouse wins TIDA Apartment of the year

Situated high in a Melbourne iconic building this apartment pays hommage to the Eureka Gold Rush namesake.

Solid brass patina-ed to perfection deep lift reveals juxtaposed with 4 pairs of custom Italian solid brass erosion patterned doors are breath taking. Exotic rich red floorboards and timber lined tunnel leading to the east wing, and a luxurious 100% silk 100 knot hand tufted rug underfoot awaits your prestige arrival. Defying all design logic, we suspended a sizable & undeniably sculptural pendant light spanning east to west to ensure impact from any lift you may be welcomed from.

Eureka Penthouse

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Epic Coastal Home wins Gold

Sunshine Coast Home Queensland Australia wins Better Future Australian Design Award 2024 – International Residential Large.

Serving its family for at least four generations to come, KGB House is founded on bringing people together. Able to be expanded and contracted to accommodate fluxes, extraordinary detail underpins the home in its consideration of the future.

KGB House

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The Sebel Manly Beachfront Hotel

Named Australia’s best beach in the TripAdvisor 2019 Travellers’ Choice Awards, the stunning new design of the Sebel Sydney Manly Beach reflects the hotel’s enviable location on the southern end of popular Manly Beach.

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