Central Coast Custom homes Renovations & Extensions
- Family Owned and operated 25 + years Experience - fully licensed and insured - Fixed price contracts
Build with confidence
Welcome to Coastline Building: Your Trusted Residential Home Builder
- Coastline Building is a trusted Central Coast builder specialising in custom homes, home renovations, extensions, second story additions, Granny flats and much more.
- 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.
Handpicked Trades. Exceptional Results.
- At Coastline Building, we work with a carefully selected team of trusted tradespeople who share our commitment to quality workmanship. Every tradesperson is chosen for their experience, reliability, and attention to detail. We believe great results come from working with skilled professionals who take pride in every aspect of their work. Together, we ensure your project is completed to the highest standard from start to finish.
Our fixed-price contracts
- At Coastline Building, we provide fixed-price contracts to give you complete transparency and confidence from the very beginning. You'll know exactly what your project will cost, with no hidden fees or unexpected surprises along the way. Our commitment to quality workmanship, clear communication, and professional service ensures every project is completed to the highest standard, on time and within budget. If you're looking for a trusted Central Coast builder, you can count on Coastline Building to deliver exceptional results with honesty and reliability.
Build with confidence
- Design & planning - We help turn your ideas into practical plans
- Council Approvals - Guild through approvals and documentation
- Fixed price contracts - Clear pricing with no hidden surprises
- Construction - Experience trades delivering quality workmanship
- Completion - Built right and ready for your family to enjoy
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.