Second Storey Additions on the Central Coast

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A Large House with A Lot of Windows and A Garage — Blue Horizon Projects in Bateau Bay, NSW

Central Coast Second Storey Additions

Running out of room but don’t want to move? A second storey addition is a great way to stay in the area you love while gaining the extra space your family needs.


At Blue Horizon Projects, based on the Central Coast, we help homeowners go up instead of out—maximising space without taking up your yard. Whether you’re creating extra bedrooms, a private retreat or a functional upstairs living area, we make sure every addition blends seamlessly with the original home in both design and structure.


Our team takes the time to understand your needs and guides you through approvals, design options and practical considerations like stair placement, natural light and layout flow.


If you're thinking about extending upwards, we’re here to make it easy. Call 0410 733 550 to speak with our experienced team and get started on your second storey addition.

Built for Comfort, Space & Style

We know that second storey additions can be a big step, but they’re also one of the most rewarding upgrades a homeowner can make. From start to finish, we focus on getting the details right—ensuring the addition feels like a natural extension of your home, not an afterthought. That includes matching rooflines and external finishes, aligning plumbing and electrical systems and designing layouts that work for your lifestyle.


We also help you think ahead: where to place the stairs, how to manage privacy and noise and how to create the kind of space that truly adds value. Every project is different, and we take the time to tailor the process to your goals, timeline and budget.


A second storey is about more than just extra space—it’s about transforming how your home works for your family. Let’s talk about what’s possible for your place.

A Modern House with A Large Garage Door and A Driveway — Blue Horizon Projects in Bateau Bay, NSW

  • Do I need council approval for a second storey?

    Yes, you’ll generally need council approval or a complying development certificate (CDC) for a second storey addition. This ensures that your plans meet local building regulations and zoning rules. The approval process can include design assessments, heritage or environmental checks, and neighbour notifications, depending on your area. It’s important to factor this into your timeline, as approvals can take several weeks or even months in some cases.

  • Can I stay in my home while a second storey is being built?

    In many cases, yes—but it depends on the scope of work. Some additions allow homeowners to stay in the home with minimal disruption, while others may require temporary relocation for safety or convenience, especially during demolition or structural work. Your builder should provide a detailed timeline and help you weigh the pros and cons of staying versus moving out during the process.

  • Will a second storey match my existing home?

    A well-designed second storey should blend in seamlessly with your existing home, both inside and out. Architects and builders work to match roof pitches, external finishes, windows and interior features to ensure the extension feels cohesive. It’s important to choose a builder who prioritises design continuity and takes the time to get the small details right.