Profectus Design is a licensed Sydney building design practice (BDAA Lic. 6844) with over 10 years' experience delivering dual occupancy, duplex and custom home projects across the Sutherland Shire and greater Sydney area.
Book Your Free SessionAt Profectus Design, we specialise in creating stunning dual occupancy homes and custom duplex designs tailored to needs of modern living. Whether you're developing for investment, family, or lifestyle, our Sydney-based team brings a wealth of architectural expertise and a strong focus on design and build solutions. Our unique approach combines smart planning, council-ready designs, and contemporary aesthetics, making your duplex home both functional and future-proof.
From home design duplex to full design & build services, we deliver solutions that maximise space, value, and liveability. As trusted home designers in Sydney, we offer innovative options for dual occupancy homes designs, duplex designs, and custom architecture home design across a range of block sizes and budgets.
Let Profectus Design guide your next development with precision, creativity, and proven results.
We specialise in creating timeless, high-end luxury home design plans for discerning homeowners across Sydney and New South Wales. Whether you're dreaming of a bold architectural statement or a refined family retreat, our expert team delivers bespoke home design solutions that combine form, function, and flair.
We offer a full suite of services — from architecture home design to design & build partnerships — guiding you through every step of the journey. Our process is collaborative and council-savvy, making it easy for you to navigate everything from early feasibility studies to DA/CDC approvals and final construction documentation.
Looking to transform your existing property? Our knockdown rebuild service allows you to start fresh on the land you love, reimagining it with a brand-new custom-designed home tailored to your lifestyle and future needs.
From start to finish, we manage all aspects of the DA journey, including:
Whether it's a duplex, knockdown rebuild, luxury home, renovation or commercial project - we know what councils want to see and how to position your design for the best chance of approval.
From start to finish, we manage all aspects of the CDC journey, including:
Whether it's a duplex, knockdown rebuild, luxury home, renovation or commercial project - we know what the SEPP requires and what certifiers want to see and how to position your design for approval.
Profectus Design is the trusted name in Sydney for discerning clients seeking refined, high-end living through luxury duplex designs and custom dual occupancy homes. With over a decade of design excellence, our studio is led by Stephen Petratos and brings together form, function and prestige in every project. Whether you envision a statement duplex residence or a bespoke multi-dwelling development, we deliver architectural outcomes that reflect sophistication, style and lasting value.
Partner with a dual occupancy designer who understands the nuances of luxury. Our tailored design process ensures every element is purpose-built for comfort, elegance and market appeal. Reach out to us today to book a private design consultation and explore how we can bring your custom duplex designs to life with absolute finesse.