Tiny, deeply quiet bush locality on the forested ridges north of Bells Line of Road, gazetted as a suburb of the City of Hawkesbury and perched at about 517 m elevation roughly 103 km north-west of the Sydney CBD. The 2021 census counted just 78 residents — one of the smallest communities in Sydney's outer fringe. Mountain Lagoon is a weekend-and-bush-block country of holiday cottages and acreage hidden along Mountain Lagoon Road, which loops off Bells Line between Kurrajong Heights and Bilpin; the name comes from the small ridge-top lake beside it, an unusual geological feature caused by tilting of the plateau. Services are essentially non-existent and the national-park wilderness presses in from the west, giving the locality a remote, self-sufficient feel that suits buyers seeking absolute peace, views and bush rather than convenience.
At a Glance
| Field | Details |
|---|---|
| Region | Hawkesbury |
| Council (LGA) | City of Hawkesbury |
| Postcode | 2758 |
| Distance to Sydney CBD | Mountain Lagoon is about 103 km north-west of the Sydney CBD by road.… |
| Median house price | $1,187,238 — median house value, Cotality/RP Data automated valuation as at 31 July 2026 (OnTheHouse) (mid-2026) |
| Price growth | +16.64% in median house value over 5 years |
Transport
Mountain Lagoon has no railway station — the nearest railhead is Richmond at the foot of the mountain, roughly a 40–50 minute drive down Bells Line of Road. No bus route enters the locality itself: Busways route 682 (the Richmond–Kurrajong via Berambing loop) runs entirely along Bells Line of Road with stops through Kurrajong Heights, Bilpin and on to Berambing, but its published stop list includes no stops on Mountain Lagoon Road, so the nearest stops are a drive away on Bells Line. In practice the suburb is car-dependent, like the rest of the Bells Line villages.
Schools
No school operates within Mountain Lagoon — a property-level check of the locality records 'no nearby primary or secondary schools' for addresses on Sams Way. Primary-age students are served by Bilpin Public School, the small NSW government K–6 school in the immediately adjacent suburb of Bilpin to the south-west, which serves the whole Bells Line district (Bilpin Public School; NSW Department of Education). There is no high school in Mountain Lagoon or its immediately adjoining villages — as Bilpin's own profile notes, secondary schooling sits further down the mountain around Kurrajong and Richmond.
Shopping & Amenities
Mountain Lagoon has no shops, cafes, post office or other commercial services of its own — the locality is almost entirely residential bush acreage with nothing in the way of a village centre. For the nearest village services residents drive a few kilometres down Mountain Lagoon Road to Bells Line of Road, where the immediately adjacent suburb of Bilpin offers fruit stalls, orchards, cafes and the local post office.
Parks & Outdoors
The suburb's namesake, Mountain Lagoon itself, is the centrepiece: a small lake on a ridge top at roughly 517 m, which Wikipedia describes as an unusual feature caused by geological tilting of the plateau (the mountain's uplift twisted the local drainage), sitting on private property but visible from Sams Way, which encircles the lake — part of Sams Way is planted as an avenue of exotic trees and shrubs with autumn and spring foliage contrasting with native evergreen bush. The locality is edged by national-park wilderness: Blue Mountains National Park borders it to the west and north-west, and the Wollemi National Park bushland around Colo Heights lies immediately to the north. For residents the outdoor life is bush blocks, firewood, wildlife and quiet gravel-road rambles rather than formal parks or lookouts.
Property Market
The median house price in Mountain Lagoon was around $1,187,238 — median house value, Cotality/RP Data automated valuation as at 31 July 2026 (OnTheHouse) (mid-2026). See our full Sydney property price map for how the suburb compares across the city. Extremely thin market: the whole suburb holds just 57 properties and only 2 sales were recorded in the 12 months to July 2026, with nothing on the market or for rent at that snapshot. The median is an AVM estimate rather than a sale-based median, so treat ~$1.19M as indicative — sales that do occur swing widely with land size, views and dwelling condition on these bush blocks. The hint range of ~$1.1–1.7M brackets the tracker value but the top end reflects only the best acreage sales. No unit market exists (median_unit null).
New Developments
Development activity is effectively nil: with 2 sales in 12 months, no listings and no project pipeline, the suburb sees only one-off house construction and renovations on existing rural-residential bush blocks under Hawkesbury's rural zoning.
Jobs & Local Economy
Local employment within Mountain Lagoon is minimal — the community is dominated by retirees, weekenders, hobby-farmers and remote workers on bush acreage. Working residents earn their living through orcharding and tourism in the adjacent Bilpin/Bells Line district, or commute down the mountain to Richmond and the wider Hawkesbury for mainstream employment.
Nearby Suburbs
Bilpin, Kurrajong Heights, Kurrajong Hills, Blaxlands Ridge, Upper Colo, Colo Heights
Sources & method
Researched 5 September 2026 from named public sources — census and government records, transport authorities, council and planning documents — plus published sales data. Where sources disagree on a figure, the guide says so rather than picking one.
Sources cited in this guide:
Corrections are welcome — if something here is out of date or wrong, tell us and we will fix it.
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