The award-winning interior architecture and interior design studio behind world class hotel makeovers and exclusive residences.

Who are del Castillo

Strongly influenced by the formalities and flamboyance of multiple cultures, we expertly unite structure with style.

del Castillo was founded in the French Alps by director Penny Del Castillo. Having moved around the world, the studio has now landed in Melbourne, Australia.

The award-winning team of interior architects and designers have an extensive portfolio of completed refurbishments for some of Australia’s iconic hotels, including most recently Sebel Sydney Manly Beach, Adina North Bank, Sebel Flinders Lane, (Grand Mercure) Basildene Manor WA, Novotel Brisbane and many more.

The studio is accustomed to creating bespoke spaces for exclusive wellness retreats and spas, including Novotel Nusa Dua, Grand Mercure Puka Park, One Wybelenna Brisbane, O’Reilly’s Lost World – Rainforest Retreat, Batu Karang Resort & Spa and more. Private residential projects extend across bachelor living, beach houses to contemporary homes for both high profile executives and celebrities. Studio del Castillo’s offering has spread to date only by word-of-mouth from repeat clientele who respect the studio’s dynamic team of experienced talent, with principles across interior design, furniture design, fashion, graphics, hospitality, marketing and business.

To achieve the best finish for each and every client project, the team collaborate with the finest hardware suppliers, material providers, architects, engineers and industry consultants.

Our specialty in designing residential and hospitality makes our homes feel more like a hotel, and our hotels feel more like a home. And every one feels unique to the people who live there and the places they exist in.


About Penny

Founder, principal and lead creative designer at delCastillo.

There are a lot of agendas on a big project. People wanting to
tick their boxes, meet their timelines, push their style, and you
end up with a place that doesn’t feel like you.

I’ve spent over two decades standing up for clients to make sure
they get exactly what they want. I hear “It can’t be done” a lot.
But when solutions are presented, we create something previously
inconceivable, and ask the unexpected questions, infinite possibilities
reveal themselves.

It’s my clients unspoken agenda that gives me the key to unlock
the process. It opens up a whole new world, one they didn’t
even know existed. It’s why I work closely with you, so the result
feels exactly like you.

Penny del Castillo

The delCastillo Team

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.

Penny del Castillo

Founder & Creative Director

One of Australia’s most versatile designers, Penny has spent 25+ years creating spaces all around the world that her clients celebrate, and their guests love to be in.

Fun Fact: Penny loves to crank up the music for a mid-morning dance break!

Claire Tew

PA & Office Manager

13 years as IDI admin manager, she is the boss's right and left hand! So much so that we had her bus cards printed with the title but ICE (In Charge Of Everything!).

Fun Fact: Claire’s passion is travel. She is a walking talking geography lesson based on her own travel experience!!

Alfie Pezzi

Business Development Manager

Comes to IDI with 31 years of senior executive experience in general management, sales and marketing, business development, brand management, product development, export, import and distribution.

Fun Fact: If Alfie is not passionately screaming at a Carlton football match you will find “Mr. Retail” shopping up a storm in a mens’ fashion boutique.


Office Therapist

2016 Cavoodle, graduated from Puppy school and has been a dedicated IDI team member his entire life, often making unassisted selections from the resource library!

Fun Fact: Asahi = Morning sunlight in Japanese.

And if you ask Asahi “where do good puppies go?” he will go straight to his designer puppy day-bed!

Working with Penny and her team was a delight from start to finish. The project was a massive one of complexity and logistics on top of pleasing two very detail oriented spouses who lived 14,000 km away.

Hamilton Island Home Owner

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We have worked with In Design International for almost a decade now on a number of major refurbishment projects. Penny and her team over this time have continued to deliver outstanding results, on time and on budget. Our guest experience scores as well as our hotel financial results have benefited considerably from the work of In Design International. The outstanding Sebel Manly refurbishment transformation has raised awareness of the quality of the Accor Vacation Club product in Australia and Internationally.

Craig Wood, CEO at Accor Vacation Club

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I need to say a huge thank you. You know I was real hesitant in engaging in an interior designer as I really didn’t know what to expect. You made us feel welcomed and comfortable from the get go. Such an enthusiastic team. You certainly exceeded our expectations for our home update.

Melbourne Home Owner

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An Interview with Penny Del Castillo