Home Extensions in
Illawarra – Free
Design & Quote

Ground Floor Extension

Expand your living area, add a new bedroom, or create an open-plan kitchen and dining space. Ground floor extensions are the most popular and cost-effective way to add space without disrupting your daily life.

Second Storey Addition

Maximise your block without sacrificing your backyard. A second storey addition adds bedrooms, bathrooms, and living space above your existing home — ideal for growing families in the Illawarra.

Granny Flat / Secondary Dwelling

Add a self-contained living space for family, rental income, or a home office. We handle design, approvals, and construction from start to finish.

Kitchen & Dining Extension

Open up your kitchen and dining area with a rear extension that flows seamlessly to your outdoor entertaining space. Perfect for modern family living.

Bedroom Addition

Need an extra bedroom for a growing family or a dedicated home office? We design and build bedroom additions that blend perfectly with your existing home.

Alfresco & Outdoor Living

Extend your living space outdoors with a covered alfresco, deck, or pergola — designed to complement your home and the Illawarra lifestyle.

"We recently had our home extended by Coastal Renovation Group and could not be happier with how it turned out. The team was easy to deal with, showed up when they said they would, and kept the place tidy throughout the job. Communication was clear the whole way through and the finish looks great. Would definitely recommend."

"We chose Coastal Renovation Group after speaking with a few companies and are glad we did. The team was professional, respectful of our home, and easy to deal with throughout the project. They kept us updated on progress and delivered exactly what was promised. The final result looks great and feels solidly built, not rushed."

"Our home extension with Coastal Renovation Group went smoothly from day one. The team arrived on time, worked efficiently, and kept disruption to a minimum. Any issues that came up were handled quickly and without excuses. The attention to detail really stood out and the finished extension looks fantastic."

"From the first quote through to the final walk through, everything was handled professionally. The boys did a full home extension for us and the quality of work really shows. No shortcuts and no dramas. They also finished pretty much on schedule which was a big plus."

10 Year Warranty

Our home extensions are built to last and we stand behind our work. Every project is backed by a full 10 year warranty for your peace of mind.

Always Ahead Of Schedule

Our team works to a clear plan so your extension runs smoothly and finishes on time, without unnecessary delays or disruption to your family.

Satisfaction Guarantee

We believe you should only pay for work you are happy with. That is why we don't get paid unless you are 100% satisfied with the result.