About us

The heart behind kastell.

We understand how vital it is to feel confident in your builder before committing to such a significant partnership. Explore more about us below and see if we’re the right fit to join you on your renovation journey.

Bright modern kitchen featuring a marble island with wooden stools, a black pendant light, and large glass doors opening to a lush outdoor dining area with greenery and natural light.
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who we are

We’re a husband-and-wife duo who believe every renovation starts with trust and a shared vision. Cam brings 15 years of construction experience, managing projects from family homes to luxury builds and Kate brings her expertise as a Product leader in the SaaS technology space - a unique, but perfect combo!

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what we do

We specialise in renovations, rebuilds, and extensions across Sydney, working closely with you to deliver results that fit your lifestyle and goals. We are experts in working with families looking to create safe and functional homes, and investors focused on maximising ROI through smart, budget-conscious renovations.

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and why we do it

Our passion stems from a desire to transform the renovation industry. We aim to eliminate common frustrations such as budget overruns and delays by providing a modern, customer-centric approach.  Our goal is to educate and support you every step of the way, ensuring a smooth and enjoyable renovation experience. 

Kate Smith and Cameron Gerardis, co-founders of Kastell Building Co., posing together in professional attire, showcasing their dynamic partnership and modern style.

Our story

Cameron and I have a unique perspective on the renovation industry. With 15 years immersed in the construction world, Cameron has worked with multiple residential builders, diving into everything from project homes to high-end custom luxury builds.

Along the way, he’s faced countless frustrations as a result of poor company set up—budget overruns, endless delays, and outdated processes—that often left both him and his clients feeling stuck and powerless. These challenges fueled our passion to create a renovation experience that truly puts our customers in control.

With my background in tech and product strategy, I saw a chance to bring a fresh, customer-focused approach to construction. By applying modern product frameworks we’re creating a renovation experience that’s not only innovative but also centered around your needs and goals.

We’re here to empower you with easy-to-understand education and we’re dedicated to making your renovation experience exceptional (even if you decide not to build with us), giving you the confidence to bring your vision to life.

We can’t wait to partner with you and make your dream build a reality.

Chat soon,
Kate & Cam

Our values

Learn about all the things that make us tick and the driving principles that will shape every aspect of your renovation.

From our commitment to transparency and collaboration to our focus on quality and education, these values ensure your journey with us is clear, collaborative, and tailored to you.

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    100% customer-centric
    We think differently. Renovation shouldn’t feel overwhelming or complicated. That’s why every decision, process, and person involved is focused on your goals.

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    Education first
    We believe knowledge is power. That’s why we provide no-cost educational resources. By understanding the details, you’ll feel confident in making decisions.

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    Quality obsessed
    We are dedicated to maintaining the highest standards in all aspects of our work from customer experience through to the quality of your build.

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    Passionate collaborators
    We thrive on working together with you and other consultants, combining our strengths to achieve shared goals.

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    Efficiency drivers
    We love streamlining processes and using the right technology to ensure your project stays on track, on time, and within budget.

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    Disruptive innovators
    We're here to question anything and everything in the construction world that doesnt make sense. Challenging the status quo with new ideas and solutions.

Our team

Meet the team behind kastell who are changing the renovation game, one client at a time.

Professional headshot of Cameron Gerardis, co-founder of Kastell Building Co., smiling warmly in a light-colored collared shirt against a plain background.
Cameron Gerardis
Co-founder and Licensed Builder

A carpenter by trade and licensed builder, Cameron brings 15 years of leadership in custom home building. His dedication to quality and passion for customer satisfaction ensures every project is built to impress.

Professional headshot of Kate Smith, co-founder of Kastell Building Co., smiling confidently in a black sleeveless outfit against a plain background.
Kate Smith
Co-founder and Product Lead

With expertise in tech and product strategy, Kate drives our innovative approach. Her customer-centered mindset and eye for efficiency have transformed us into a truly modern renovation service.

Person holding a smartphone displaying the Kastell website homepage with the text 'The heart behind Kastell,' featuring a modern interior image of a kitchen with large glass doors.
Sounds interesting?

Schedule a quick chat with Cam

At a convenient time that works for you. We're happy to answer your questions free of obligation.

Testimonials

Trusted reviews from our clients

Hear directly what our past clients have had to say about kastell. We put your experience at the heart of our business and we wouldn't have it any other way.

"The process was smooth from day one. Great ideas, no hidden costs, and a kitchen that fits our lifestyle down to the details."

Sam
Kitchen Renovation, Naremburn

"Kastell gave us practical advice and stunning results. The kitchen feels spacious, modern, and perfect for our growing family."

Priya & Arjun
Kitchen Renovation, Chatswood

"We were impressed by the communication and quality provided by Cameron. Kastell helped us design a kitchen that works beautifully in our apartment."

Mei & Daniel
Kitchen Renovation, Artarmon

“We’d been putting off our reno for years, but Kastell made it feel easy. The finishes are beautiful, and they kept us in the loop the whole way through.”

Priya & Daniel
Family Bathroom North Sydney

"Cam and the team were super professional. The ensuite turned out even better than we imagined, and everything ran on time. Would definitely use them again."

James & Sarah
Ensuite in Willoughby

"Kastell made our home extension easy and stress-free. They took care of everything, and we’re so impressed with the final result. It feels like the space was always meant to be this way."

Julia & David
Home Extension