Colebee is a contemporary residential suburb in Sydney's outer north-west growth corridor, sitting within the City of Blacktown local government area approximately 47 kilometres west of the Sydney CBD. Its SEIFA IRSAD raw score of 998 places it fractionally below the national mean of 1000, landing in decile 7 of 10 nationally and at the 56th percentile within New South Wales. That combination puts Colebee in the advantaged band, reflecting a household income and resource profile that is broadly middle-to-upper for Western Sydney. The reading is useful context for investors, but it is one input among many, not a verdict on any specific listing.
ABS 2021 IRSAD release. Score 998 (national mean = 1000).
Colebee's SEIFA position is consistent with its character as a planned estate suburb that attracted owner-occupier families seeking modern housing with access to the M7 motorway, Marsden Park retail, and the Stonecutters Ridge Golf Club precinct. The suburb's population was recorded at 4,914 in the 2021 census, reflecting rapid growth from a much smaller base earlier in the decade, and ongoing urban development continues in the surrounding corridor. A decile 7 reading means PropertyRanker's model treats Colebee as a moderate positive on the economic_strength criterion. The raw score of 998 is close enough to the national mean that it does not generate a strong signal in either direction on hazard_risk or entry_point_risk; those criteria will be shaped more by the specific asset, its pricing against comparable sales, and overlay status than by the postcode-level SEIFA frame. Investors should note that Colebee sits within a broader Western Sydney corridor where SEIFA scores vary considerably suburb by suburb. Neighbouring Dean Park shares the 2761 postcode but has older housing stock and a different demographic profile, which illustrates why postcode-level data requires careful interpretation. The suburb's car-dependent layout and reliance on Schofields or Quakers Hill stations for heavy rail are structural factors that affect tenant demand and should be weighed alongside the SEIFA reading. For PropertyRanker's four strategies, the suburb's price point and yield tendencies suggest it sits most naturally in the Capital Growth or Balanced strategy range, though investors should score a specific listing to confirm which strategy anchor applies.
According to CoreLogic data published via yourinvestmentpropertymag.com.au (as of April 2026), Colebee houses have a median price of $1,340,000, reflecting a -0.74% change over the past 12 months, with 115 house sales recorded in that period and an average of 55 days on market. RateMyAgent separately reports the median at $1.4m with sales volume down 13% year-on-year, consistent with a softening demand picture. Domain Insight (December 2025) noted Colebee was Sydney's fastest-growing suburb over five years, with the median rising from $485,000 in 2020 to $1.37 million, though momentum has since plateaued.
Anchor points pulled per refresh from publicly available suburb profiles. Approximate; not a moving average.
Two of three available signals are softening: national rental vacancy is edging up and days on market at 55 days is elevated, while vendor discount direction could not be determined from available sources.
Sources: Colebee NSW 2761 Suburb Profile & Property Report (2026-04-30); Colebee: Sydney's fastest-growing suburb (2025-12-01); Find Real Estate Agents & Agencies in Colebee - RateMyAgent (2026-07-01); The Latest Rental Vacancy Rates around Australia - PropertyUpdate (2026-08-01) · Refreshed 2 Sep 2026
PropertyRanker scores any Australian property against 12 criteria across three pillars: Growth, Cashflow, and Risk. SEIFA is a primary signal for economic strength and a supporting one for entry-price risk. It also informs the crime side of hazard risk, though physical overlays like flood, bushfire and coastal exposure, and recorded crime data where available, take priority there. The decile of 7 shown above gives a listing in Colebee a stronger starting line on economic strength than the national median postcode, and a softer one on entry-price risk, since more advantaged postcodes usually carry higher entry prices.
On top of that, PropertyRanker chooses one of four strategies (Balanced, Growth, Yield, Regional) and applies a per-strategy yield anchor. The anchors are 3.5% for Growth, 5% for Balanced, 6% for Yield, and 7% for Regional. A postcode at this level of relative advantage tends to suit the Growth (3.5% anchor) and Balanced (5% anchor) strategies more readily than Yield (6%) or Regional (7%), because a higher entry price compresses the gross yield a listing can reach without a specific value-add.
Read the scoring guide for the full criteria list and how the verdict thresholds work.
SEIFA is a postcode-level read. The fastest sanity check on any single decile reading is to compare it against the suburbs that surround it.
Before drawing conclusions from Colebee's SEIFA reading, investors should confirm several things that a postcode-level score cannot see. First, check current SQM vacancy data for the 2761 postcode, because a tight or loosening rental market will affect yield assumptions regardless of the SEIFA band. Second, review any flood, bushfire, or planning overlay status for the specific lot via the NSW Planning Portal, as Western Sydney growth corridors can carry localised constraints that do not appear in suburb-level indices. Third, if the listing is a strata or community title property, obtain a current strata or body corporate report to assess levy levels and any outstanding special levies. Fourth, price the listing against recent comparable sales in Colebee and the immediately adjacent 2761 suburbs to assess whether the asking price is consistent with the market or represents a premium that compresses the yield. Score the specific listing in PropertyRanker for a verdict that accounts for what this postcode-level reading cannot see, including current SQM vacancy, body corporate health, flood and overlay status, and pricing against recent comparable sales.
Colebee's SEIFA IRSAD score of 998 places it in decile 7 nationally and at the 56th percentile within New South Wales, which PropertyRanker treats as a moderate positive on economic strength. That said, a suburb-level SEIFA reading does not determine whether a specific listing is a sound investment; the asset's price, yield, vacancy rate, and overlay status all matter independently. Investors should score the specific listing in PropertyRanker to see how all twelve criteria combine for that property.
Colebee's profile as a planned estate suburb in Sydney's outer north-west growth corridor, with a household income base near the national mean, tends to align more naturally with PropertyRanker's Capital Growth strategy (anchored around 3.5 percent gross yield) or the Balanced strategy (anchored around 5 percent). High Yield and Regional strategies typically require a higher gross yield anchor that is harder to achieve at Sydney metro price points. Investors should score the specific listing to confirm which strategy anchor the actual numbers support.
The suburb's car-dependent layout and distance from heavy rail (residents typically drive to Schofields or Quakers Hill stations) are structural factors that can limit the tenant pool compared to more transit-accessible suburbs. Colebee also sits within a broader growth corridor where new housing supply continues to be released, which can affect resale competition and rental demand over time. At the postcode level, the 2761 area includes Dean Park, which has a different housing profile, so investors should verify that comparable sales used for pricing are genuinely like-for-like within Colebee itself.
PropertyRanker uses twelve scoring criteria across macro and asset-level signals. SEIFA IRSAD is a primary input for three of those criteria: economic_strength, hazard_risk, and entry_point_risk. For Colebee, the raw score of 998 and decile 7 reading feed into those macro criteria. The remaining criteria draw on asset-level data including current SQM vacancy rates, body corporate health, flood and planning overlay status, and pricing against recent comparable sales, none of which are visible at the postcode level.
Colebee, Quakers Hill (2763), and Marsden Park (2765) all sit within the City of Blacktown LGA and the outer north-west Sydney corridor, but they have different housing stock, price points, and infrastructure profiles. Quakers Hill is a larger, more established suburb with direct T1 Richmond Line rail access, while Marsden Park is a newer growth area anchored by a major retail and business park precinct. SEIFA scores, yield tendencies, and vacancy rates differ across these suburbs, so investors should score each specific listing rather than treating the corridor as uniform.
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