IDI are...  forward...curious...responsive ...personal...experienced. The diverse background of our team brings a multitude of disciplines together via interior architecture, interior design, fashion, graphics, marketing/branding & business to help us translate your dream and vision into an inspired unique space.

STUDIO IDI

Founded in 2003, In Design International (IDI) is a Melbourne based multidisciplinary interior architecture + design studio.  Built on a reputation of repeat clientele and word of mouth, we are known for our dynamic, intelligent sophisticated interiors. Day to day these spaces function brilliantly all the while being infused with passion and creativity.

Our studio is bursting with a talented, friendly, approachable and absolutely committed team. We will achieve the best design solutions from inception to completion for every given project, whether it be a private residence, resort, hotel, spa, boutique development, or hospitality venture.

IDI collaborates extensively with leading industry consultants and contractors such as architects, landscape designers, lighting, sound and hydraulic engineers, builders and trades to achieve what may often seem impossible.

IDI benefits from excellent return business as existing clients extend their property portfolios, with loyalty driven by the studio's commitment to delivering not only creative excellence, but a design journey that is both seamless and enjoyable. We set the tone by maintaining the company policy which is  “not to do business without pleasure”.

DIRECTOR & FOUNDER

Penny del Castillo is the founder, principle and lead interior architect + designer at IDI. Penny has spent 25+ years nationally and internationally creating spaces that celebrate sophisticated innovative elegance. Penny draws her inspiration from having lived and travelled extensively throughout Europe, South East Asia & the Americas. Strongly influenced by the formalities and flamboyance of multiple cultures, she expertly unites structure with style, generating spaces which reflect the unique lives of those who live, work, play, love and grow within them.

Penny’s vision for IDI has a positive, collaborative, approachable and refreshing energy that not only produces great creative work but also ensures that her clients enjoy the entire design journey experience. It is no coincidence that she has an impressive track record of returning clientele, some dating back to the earliest IDI days over 15 years ago!

When not obsessing over design details, Penny is a very proud wife, step mum, Pyjama Angel*, novice Yogi, world traveller, theatre and gallery enthusiast, expert champagne taster and loves nothing more than spending cuddle time with her little ray of sunshine Cavoodle pup, Asahi*.

*https://thepyjamafoundation.com/

**Asahi (朝日, 旭, or あさひ) means "morning sun" in Japanese