Northern Beaches · NSW 2097
Premium home builder in Collaroy.
CSN Constructions delivers high-performance custom homes, renovations and additions in Collaroy and the surrounding Northern Beaches - built with craftsmanship, modern building science and clear, builder-led communication.
What we build
Building services in Collaroy.
Whether you're planning a new home, a renovation or an addition in Collaroy, CSN brings the same premium process to every project.
Custom House Builds
Architectural and custom new homes built with careful planning, clear communication and premium execution.
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Renovations & Restorations
Thoughtful transformations of existing homes, balancing modern comfort with respect for the structure already there.
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Additions & Extensions
First-floor additions, second-storey additions and extensions that create more space, light and value.
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High Performance Passive House Builds
Comfortable, efficient and healthier homes using modern building-science principles and Passive House expertise.
Explore serviceWhy Collaroy homeowners choose CSN
Local knowledge, premium execution.
CSN understands the homes, sites and expectations of Collaroy clients planning substantial Northern Beaches projects.
Certified Passive House Tradesperson
Australian Passivhaus Association Member 2026
Master Builders Association Member
NSW Builder Licence 271210C
Servicing Collaroy and the wider Sydney's Northern Beaches and North Shore.
Start the conversation
Book an initial consultation with CSN.
Every project is different. Share your plans with us and we'll help determine the best approach for your goals.