Quality home Builder
Custom New homes, Renovations, Extensions, decking and granny flats specilist
Welcome to Coastline Building: Your Trusted Residential Home Builder
Coastline Building is a trusted Central Coast builder specialising in custom homes, home renovations, extensions, granny flats, and quality building
services across the Central Coast NSW.
As a local, family-owned building company with over 20 years’ experience, we deliver high-quality workmanship, clear communication, and reliable project management from concept to completion.
Whether you’re planning a new home build, renovating your existing home, adding an extension, or building a granny flat, Coastline Building creates spaces tailored to your lifestyle, block, and budget, built properly, built to last.
Why Choose Coastline Building?
Coastline Building brings expertise and attention to detail to every project. Led by John, who has over 20 years of experience in the industry, John has handpicked a skilled team to ensure the highest standards of workmanship on every job. We specialise in custom new home builds, renovations, and extensions. Whether you’re building from the ground up or upgrading your current space, we have the experience to bring your vision to life.
Our fixed-price contracts provide complete transparency and eliminate any unexpected costs. You can rest assured your project will stay within budget, with no surprises along the way. We pride ourselves on our commitment to quality and professionalism. With clear communication and timely delivery, we ensure every project meets the highest standards, Central Coast Builder
Design, Planning Building
Build with Coastline Building — Simple, Stress-Free, Done Right
Plan
We listen, plan, and bring your ideas to life—homes, renovations, extensions, and granny flats.
Design & Approvals
We help with design and council approvals, keeping everything smooth, stress free and compliant.
Fixed Pricing
Clear, upfront quotes with no hidden costs.
Build
Quality workmanship from a trusted team, managed from start to finish.
Handover
Finished to a high standard, ready for you to enjoy.
One builder. One team. Built right.
Recent Projects
Custom Home Building - Berkley Vale
Commercial Construction - Hunter Valley
Custom Home Building - Berkley Vale
Coastline Building specialize in building custom homes tailored to your individual needs and style. Our team of experts will guide you through the entire process from start to finish, ensuring your dream home becomes a reality.
Renovations and extensions - Erina
Commercial Construction - Hunter Valley
Custom Home Building - Berkley Vale
Is your current home in need of a makeover? We specialise in transforming outdated spaces into functional, beautiful living areas catering for all budgets
Commercial Construction - Hunter Valley
Commercial Construction - Hunter Valley
Commercial Construction - Hunter Valley
We also offer commercial construction services for businesses looking to build or renovate their property. Our team has experience working on a variety of commercial projects, from office spaces festivals and retail stores.
Second Story Additions - Gosford
Second Story Additions - Gosford
Commercial Construction - Hunter Valley
Need more space? Whether it’s a second story addition, larger kitchen, or additional living area, we can design and build an extension that blends seamlessly with your existing home.
Granny Flats - Bateau Bay
Second Story Additions - Gosford
Granny Flats - Bateau Bay
Build fully functional granny flats that are perfect for guests, rental income, or multi-generational living.
Outdoor Living - Avoca
Second Story Additions - Gosford
Granny Flats - Bateau Bay
Take your home to the next level with an outdoor living space designed for relaxation, entertainment, and enjoyment. Whether it’s a spacious deck, a stylish patio, or a fully equipped outdoor kitchen, we create functional and beautiful outdoor areas that expand your living space and complement your home’s design.
What Our Clients Say
''We just wanted to say a huge thank you for all the effort that you and your team put in to building our homes at Green point. I couldn’t speak highly enough of Coastline Building and team.
Prior to meeting with John, we had shopped around and visited many different builders always leaving feeling confused and frustrated. Constanly being fed “hook” prices to get us in the door and finding out that to fully complete the home was considerably more expensive then once told. However, after speaking with John, we felt at ease. We knew what we could expect without any hidden costs. John quoting was very detailed nothing was left out, which gave us the reassurance that the quoted price was exactly what was expected to pay with no hidden costs. Thank you so much John and team one very happy client. Coastline building is definitely Number one builder central coast ''
Sarah and Nathan :)
''John and his coastline building team rectified a previous builder's mistake in our house on central coast. John and his team were very professional, punctual and they did a great job. We are very happy with the result, happy too, with the cost, which we felt was fair and very reasonable. We would recommend John and his team to anyone''
''John and the boys from coastline building did a fantastic job on our extension/renovation at our place. The attention to detail was 2nd to none and the boys were very professional and punctual.
John made the white process smooth and stress free Highly recommend these guys
number one builder on the central coast''
Andrew Richard
"From start to finish, Coastline Building was fantastic. They made sure everything stayed on budget, and the quality of the work was impeccable. We highly recommend them to anyone looking for a reliable and skilled builder."
— Sarah & Mark, Gosford
"We couldn’t be happier with our new home. The Coastline Building team took the time to understand exactly what we wanted, and the results speak for themselves. Their professionalism and attention to detail were outstanding throughout the entire process."
— Emma & David, Central Coast
''John and his team completed a challenging restoration job on my house at almost 1/3 of another competitors quote, with a very quick turnaround time and a first class result. John was an absolute pleasure to deal with from the minute he received my first call, to conducting the thorough quote and then completing the job whilst I was away on business travel. I highly recommend coastline building and his team and will no doubt use him again in the future when I need further work done - Especially on the Central Coast of NSW where finding decent, RELIABLE trades-people is almost impossible! ''
Thanks again John, Cheers Aaron.