6 Onthonna Tce, Umina Beach is a 4 bedroom, 3 bathroom House with 4 parking spaces. The property has a land size of 740m2. While the property is not currently for sale or for rent, it was last sold in February 2025. There are other 4 bedroom House sold in Umina Beach in the last 12 months.
Showcasing the perfect fusion of inspired architectural design, a magnificent natural setting, and a dream address just minutes to an array of breath-taking beaches, this coastal masterpiece is a rare find. Backing onto Brisbane Water National Park, a contemporary design awaits, welcoming family and friends through established gardens via sandstone paving and timber walkways. Inside, a superbly crafted dual-level design offers spacious family living across two levels, linked by a timber deck to a bonus self-contained guest accommodation. Outside, a selection of al fresco entertaining zones offer multiple spaces to sit back, relax, and take in the beauty of this incredible location. With scenic bushwalks available from your backyard and your choice of beaches just minutes away, this captivating property is ready and waiting to elevate your everyday experience.
Features include:
- Architecturally designed masterpiece offering a dual-level residence + bonus self-contained guest studio, all perfectly nestled into stunningly scenic surrounds with immersive views.
Extras include: split-system air conditioning and an extensive solar system (minimal power bills) with 19 panels servicing the whole house.
Properties of this calibre and location are far and few between. Onthonna Terrace rests within the sought-after 'South Umina' area, prized for it's deep sense of serenity while being within easy reach of every lifestyle convenience and a stunning coastal corridor of beaches, bushwalks, and waterways. For those heading further afield, local train stations are close by, and Wahroonga is less than an hour's drive (62 km) for easy access to Sydney and surrounds.
For further information or to secure your inspection, call Adrienn Stenner today on 0414 729 453.
The size of Umina Beach is approximately 7.0 square kilometres. It has 20 parks covering nearly 14.3% of total area. The population of Umina Beach in 2016 was 16733 people. By 2021 the population was 17372 showing a population growth of 3.8% in the area during that time. The predominant age group in Umina Beach is 50-59 years. Households in Umina Beach are primarily childless couples and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Umina Beach work in a professional occupation.In 2021, 63.60% of the homes in Umina Beach were owner-occupied compared with 65.40% in 2016.
Umina Beach has 8,701 properties. Over the last 5 years, Houses in Umina Beach have seen a 54.34% increase in median value, while Units have seen a 54.23% increase. As at 30 November 2025:
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