St Huberts Island is one of the Central Coast’s most distinctive places to live: a canal estate set in Brisbane Water where almost every home is arranged around water access. The two streets sit on the same island yet offer two takes on that lifestyle. Mainsail Avenue is canal-front with a sunny northerly aspect, while Mercator Parade faces deep water with heavier boating infrastructure. This guide compares the two for buyers deciding which side suits them.
The Shared Island Setting
Both streets share the same fundamentals. St Huberts Island is a canal estate and suburb of the Central Coast, connected to the mainland at Daleys Point and forming part of the Woy Woy Peninsula, as set out in its Wikipedia entry. The 2021 Census recorded a population of 1,080, a median age of 58 and a median household income of $1,605 a week, according to the StMate suburb profile. The ABS QuickStats show a settled, older community where childless couples dominate (56.2% versus 32.2% with children) and most residents are in their late sixties and seventies. It is overwhelmingly owner-occupied, at roughly 90%, per Domain. Schools, transport and village amenities are effectively common to both streets, so the comparison returns to frontage and lifestyle rather than location.
Canal Living vs Deep-Water Frontage
Mainsail Avenue is canal-front with a predominantly northerly aspect, wide water outlooks and long, sunny views that run to the sunsets, as described in a sold listing for 11 Mainsail Avenue. Homes carry jetties, mooring poles and slipways on calm, tranquil canals.
Mercator Parade is the island’s deep-waterfront product, with homes fronting deeper water and a stronger boating emphasis: private jetties, mooring pens, slipways and sandy beach edges. A listing for 34 Mercator Parade describes an outstanding deep waterfront with a jetty and 25 metres of frontage. For buyers, the choice is a sunny canal outlook or direct deep-water access.
Homes, Blocks and the Property Mix
Mainsail Avenue is a consistent family street. Its Domain street profile counts 37 properties, all houses, with 85% owner-occupied and 15% rented. The typical configuration is four bedrooms, three bathrooms and four car spaces, and the street is characterised by two-storey double-brick builds, with blocks clustered tightly around 655 to 696 square metres.
Mercator Parade follows a different pattern. Its Domain street profile records 36 properties at 95% owner-occupancy, on larger, more varied lots ranging from 664 square metres up to 854, 946 and 1,022 square metres, with historical holdings to 3,003 square metres on OldListings. It also turns over roughly every 11 years, per Microburbs. Mainsail offers a consistent, family-oriented streetscape, while Mercator delivers larger, more varied prestige lots.
Price and Value on Each Street
Neither street has a clean street-level median, so the best read comes from dated sales and current estimates. Mainsail Avenue trades mostly in the $1.97m to $2.6m band: 25 Mainsail Avenue sold for $1,970,000 in 2025, 13 Mainsail Avenue for $2,600,000 in 2023 and 33 Mainsail Avenue for $2,000,000 in February 2026. Estimates run from about $2.0m to $2.43m, from 6 Mainsail Avenue at $2,015,000 up to 11 Mainsail Avenue at $2,432,000, also listed at $2,600,000 to $2,700,000.
Mercator Parade reaches the island’s premium end: 13 Mercator Parade at $3,400,000 in January 2026, 9 Mercator Parade at $3,200,000 in December 2025 and 30 Mercator Parade at $2,950,000 in July 2025. Estimates run to about $3.07m, and 34 Mercator Parade, on a 1,022 square metre holding, carries a guide of $2.6m to $2.7m. There is also a genuine entry point, 1 Mercator Parade, a corner block, at $1,380,000 in February 2026. For context, the suburb’s median house price is $1,950,000, per OnTheHouse.
Waterfront Lifestyle and Boating
Life on both streets is built around the water. On Mainsail Avenue the rhythm is sunny canal living, with pools at the canal’s edge, easy boat access and long sunset outlooks. There is also a short-term holiday-let: MainSail, a north-facing three-bedroom waterfront home with a pool and jetty, from $695 a night. Mercator Parade leans into direct deep-water boating and entertaining. 7 Mercator Parade is a five-bedroom waterfront home on one of the island’s most prestigious streets, with a private in-ground pool and spa and a north-east aspect. Along the parade, homes add drive-through garages to slipways with electric winches, plus mooring pens and sandy beach edges. Around the island, kayaking, paddleboarding, sailing and fishing fill the canals and Brisbane Water, with Ettalong Beach, Umina and Woy Woy a short drive away.
The Essentials Both Streets Share
For day-to-day practicalities, the two streets are close to identical. Both fall in the same school catchments: Empire Bay Public School is the primary school, a 16 minute walk from Mainsail and 18 minutes from Mercator, while Brisbane Water Secondary College Umina Campus is the secondary school, an 11 minute drive from Mainsail and 10 minutes from Mercator.
Transport is shared too. The island’s bus boarding point sits on Helmsman Boulevard, served by Busways route 64 and route 59, and Woy Woy railway station gives a direct rail connection to Sydney, roughly a 10 minute drive away, per StMate. There are no shops or cafes on the island, so Ettalong, Umina and Woy Woy, about five minutes away by car, are the shared amenity base for both streets.
Frequently Asked Questions
What is Mainsail Avenue St Huberts Island known for?
Mainsail Avenue is known for canal-front living with a predominantly northerly aspect, wide water outlooks and long, sunny views with sunsets. Homes carry jetties, mooring poles and slipways, as the sold listing for 11 Mainsail Avenue describes.
How much do houses sell for on Mainsail Avenue St Huberts Island?
Recent sales span roughly $1.97m to $2.6m, from 25 Mainsail Avenue at $1,970,000 to 13 Mainsail Avenue at $2,600,000. Estimates sit around $2.0m to $2.43m, from 6 Mainsail Avenue at $2,015,000 up to 11 Mainsail Avenue at $2,432,000, against a suburb median of $1.95m.
What are typical block sizes on Mainsail Avenue St Huberts Island?
Blocks cluster tightly around 655 to 696 square metres, with recorded sizes of 655, 661, 688, 691 and 696 square metres, per the Domain street profile.
Is Mainsail Avenue St Huberts Island good for boating?
Yes. Canal frontage with jetties, mooring poles and slipways is standard, with easy access out into Brisbane Water, and the 11 Mainsail Avenue listing notes a full-width canal front.
What type of homes are on Mainsail Avenue St Huberts Island?
They are all houses, typically four-bedroom with three bathrooms and four car spaces, and predominantly two-storey double-brick. The Domain street profile records 85% owner-occupied.
How many properties are on Mainsail Avenue St Huberts Island?
There are 37 properties, all houses, with 85% owner-occupied and 15% rented: a consistent family street, per Domain.
What is Mercator Parade St Huberts Island known for?
Mercator Parade is known for prestige deep-waterfront living with private jetties, mooring pens, slipways and sandy beach edges. 34 Mercator Parade is described as an outstanding deep waterfront with a jetty.
How much do houses sell for on Mercator Parade St Huberts Island?
It reaches the island’s premium end. 13 Mercator Parade sold for $3,400,000 in January 2026, with $3.2m and $2.95m sales also recorded. Estimates run to about $3.07m, and 34 Mercator Parade carries a guide of $2.6m to $2.7m on a 1,022 square metre holding, while the entry point was $1,380,000 for a corner block in February 2026.
What are the block sizes on Mercator Parade St Huberts Island?
They are larger and more varied than Mainsail’s, from 664 square metres up to 854, 946 and 1,022 square metres, with historical holdings to 3,003 square metres, per OldListings.
Does Mercator Parade St Huberts Island have deep-water frontage?
Yes, that is its defining feature. Homes offer deep-water frontage with private jetties, mooring pens, slipways and sandy beach edges: a private jetty with mooring pen and sandy beach edge at 34 Mercator Parade and a sandy beach edge with shared jetty, boat mooring and slipway at 30 Mercator Parade.
Is Mercator Parade St Huberts Island a prestige street?
Yes. It has 36 properties at 95% owner-occupancy, larger lots and top-of-market sales, and 7 Mercator Parade is described as one of the island’s most prestigious streets.
How many properties are on Mercator Parade St Huberts Island?
There are 36 properties, 95% owner-occupied and 5% rented, with a recorded sale of $3.2m in December 2025, per the Domain street profile.
Conclusion
Schools, transport and village amenities are shared, so the real choice comes down to frontage and how you want to live on the water. Mainsail Avenue suits buyers after consistent, sunny canal-front family living around the $2m mark, while Mercator Parade suits buyers chasing the island’s premium deep-waterfront boating product on larger lots. Match the street to the waterfront lifestyle you actually want, and either way you are buying into a strongly owner-occupied island setting.