Business Details
We founded DJ O'Sullivan Building in 1990 and have proudly served the Sydney region for over two decades. Our 22year track record spans residential, commercial and industrial projects, consistently delivering innovative design solutions. From custom kitchens and bathrooms to fullscale new builds and groundfloor additions, we tailor every proposal to our clients budgets and aspirations. We pride ourselves on a philosophy that puts the clients vision first, combining costeffective strategies with cuttingedge design thinking. Every project is treated as if it were our own, ensuring meticulous attention to detail and uncompromising quality. We provide free, obligationfree design consultations to give clients clarity before any commitment.
Our fixedprice contracts and personalised service give you peace of mind and transparent budgeting. We manage all council development approvals and necessary documentation, streamlining the process for you. Our portfolio includes highprofile works such as the Randwick Garage, Cabana, Pool, Spa & Landscaped Gardens and the Singleton Court House heritage restoration. We are a preferred subcontractor for NSW Government Public Works Heritage Services, delivering specialised restoration and maintenance for historic buildings. Above all, we are dedicated to client satisfaction, delivering projects on time, within budget and to the highest professional standards.
Our fixedprice contracts and personalised service give you peace of mind and transparent budgeting. We manage all council development approvals and necessary documentation, streamlining the process for you. Our portfolio includes highprofile works such as the Randwick Garage, Cabana, Pool, Spa & Landscaped Gardens and the Singleton Court House heritage restoration. We are a preferred subcontractor for NSW Government Public Works Heritage Services, delivering specialised restoration and maintenance for historic buildings. Above all, we are dedicated to client satisfaction, delivering projects on time, within budget and to the highest professional standards.
Highlights and features
- We have 22 years of proven construction experience.
- We offer free, obligationfree design consultations.
- Our fixedprice contracts provide transparent budgeting.
- We manage all council development approvals.
- We specialise in heritage restoration for NSW Government.
Services
New Builds
New Builds is our flagship service, delivering highquality residential and commercial structures from concept to completion. We handle every phase, from custom design to construction, ensuring adherence to budgets and timelines. Clients benefit from our meticulous project management and commitment to safety, quality and environmental standards.
Additions
Additions specialises in second or groundfloor extensions that maximise space and value. Our team designs and builds additions that integrate seamlessly with existing structures, respecting architectural style and zoning requirements. Clients enjoy increased living area and improved functionality while maintaining cost efficiency through our fixedprice approach.
Heritage Restoration
Heritage Restoration delivers specialised conservation and maintenance for historic buildings, a niche we support for NSW Government Public Works. We refurbish toilets, demolish and rebuild garages, stabilise chimneys, and restore bell towers, ensuring heritage integrity while meeting modern safety standards. Clients gain assurance that their heritage assets are preserved with expert craftsmanship.
Design Consultation
Design Consultation offers obligationfree, expert guidance from initial concept to final design. We assess site conditions, budgets and client preferences to produce tailored design solutions that balance aesthetics and functionality. Clients receive clear, actionable plans that reduce uncertainty and set the foundation for a successful build.
Council Approval
Council Approval manages all development application processes, including full council DA submissions and required documentation. We liaise with local authorities to secure approvals swiftly, minimising delays and ensuring compliance with regulations. Clients benefit from a streamlined, transparent process that keeps projects on schedule and within budget.
