Deer Park is a western Melbourne suburb sitting 17 kilometres from the CBD inside the City of Brimbank. Its SEIFA IRSAD score of 974 places it below the national mean of 1000, in decile 5 of 10 nationally and at the 38th percentile within Victoria. That reading signals a mid-band socioeconomic profile: not among the most disadvantaged areas in the state, but meaningfully below the Victorian midpoint. Investors should treat that positioning as a structural input to their analysis, not a verdict on any individual property.
ABS 2021 IRSAD release. Score 974 (national mean = 1000).
A SEIFA IRSAD score of 974 tells PropertyRanker that Deer Park sits in a zone where relative income and resource constraints are present at the postcode level. The national mean is 1000, so the 26-point gap is modest but consistent. Within Victoria, landing at the 38th percentile means roughly six in ten Victorian suburbs score higher on this index. PropertyRanker feeds this reading directly into three of its twelve scoring criteria: economic_strength, hazard_risk, and entry_point_risk. On the economic_strength dimension, a below-mean SEIFA reading tends to compress the ceiling on rental income growth and can slow the pace at which capital values re-rate upward during broad market recoveries. On entry_point_risk, a mid-band score suggests the suburb is not priced at a premium that requires a strong socioeconomic tailwind to justify, which can be a relative advantage for investors who are comfortable with the trade-off. Deer Park carries a mixed-use character, with residential, industrial, and commercial zones coexisting across the suburb. Its freeway and arterial access to the CBD is a genuine structural positive, and the suburb's population of roughly 18,000 provides a reasonable rental demand base. However, SEIFA operates at the postcode level and cannot distinguish between a well-maintained house on a quiet residential street and a property adjacent to an industrial corridor. The score is one of twelve signals in the PropertyRanker model, and it cannot see the specific street, the strata, the build year, or the orientation. A strong or weak SEIFA reading does not by itself make a suburb a buy or a pass. A specific listing can score well or poorly inside the same postcode frame. For strategy alignment, the suburb's mid-band profile and mixed yield environment suggest the Balanced strategy (anchored around 5 percent gross yield) is the most natural starting point, though individual listings may align better with Capital Growth or High Yield depending on current asking price and achievable rent.
According to CoreLogic data via yourinvestmentpropertymag.com.au (to May 2026), Deer Park VIC 3023 recorded a median house price of $700,000 with 4.48% annual capital growth and 245 house sales over the past 12 months, with houses averaging 18 days on market. Supply-side conditions are tight, with stock on market at 0.3% and inventory at 1.57 months per htag.com.au (September 2026), supporting upward price pressure. A vacancy rate of 1.88% is balanced and auction clearance sits near 79%, pointing to a warming but not overheated market.
Anchor points pulled per refresh from publicly available suburb profiles. Approximate; not a moving average.
Days on market are short and falling (18 days per CoreLogic/YIP vs 26-27 days in Dec 2024-Nov 2025 per auspropertyreport.com.au), stock on market is very low at 0.3%, and vacancy at 1.88% is balanced, combining to a warming signal; vendor discount direction could not be confirmed from retrieved sources.
Sources: Deer Park VIC 3023: Suburb Profile & Property Report (2026-09-01); Deer Park, VIC 3023 Property Market and House Prices 2026 (2026-09-16); Home Buyers Guide - Deer Park VIC (2025-10-22); Deer Park VIC Real Estate: Prices, Lifestyle and Local Insight (2026-06-01); DEER PARK VIC, AU SUBURB PROFILE - Smart Property Investment (2026-01-01) · Refreshed 22 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 5 shown above gives a listing in Deer Park a broadly mid-band starting line on economic strength and entry-price risk relative to the national median postcode.
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 mid-band postcode does not favour one strategy outright; Balanced (5% anchor) is the common fit, with Yield (6%) reachable where a specific listing rent-to-price ratio supports it.
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 the SEIFA reading, investors should confirm several things at the listing level. First, check the specific street's proximity to industrial land uses, as Deer Park contains active commercial and industrial zones that can affect both liveability and resale liquidity. Second, review any planning overlays, including flood overlays along the Kororoit Creek corridor, which runs through parts of the suburb. Third, assess the property's build era: the suburb contains a mix of post-war brick homes and newer estate stock, and the condition gap between these cohorts can be significant. Fourth, examine comparable sales within the immediate street rather than the broader postcode, given the internal variation across Deer Park's residential precincts. Finally, score the specific listing in PropertyRanker for a verdict that accounts for what a postcode-level reading cannot see, including current SQM vacancy, body corporate health, flood and overlay status, and pricing against recent comparable sales.
Deer Park presents a mixed picture at the postcode level. Its SEIFA IRSAD score of 974 sits below the national mean of 1000 and at the 38th percentile within Victoria, which PropertyRanker treats as a moderate constraint on economic_strength and entry_point_risk. That does not make the suburb unsuitable for investment, but it does mean individual listing quality matters more than the postcode average. Score the specific property in PropertyRanker to see how it performs across all twelve criteria.
The suburb's mid-band SEIFA profile and mixed residential character suggest the Balanced strategy, anchored around 5 percent gross yield, is the most natural fit for most listings here. Capital Growth (around 3.5 percent yield) requires a stronger socioeconomic tailwind than a 974 SEIFA score reliably provides, while High Yield (around 6 percent) depends on finding a listing where the rent-to-price ratio supports that anchor. Check the current asking price and achievable rent for the specific property before committing to a strategy.
The primary macro-level risk flagged by PropertyRanker is the below-mean SEIFA reading, which can limit rental income growth and slow capital re-rating relative to higher-scoring suburbs. At the property level, the suburb's mix of industrial, commercial, and residential zoning means that street-level location matters considerably. Flood overlay exposure along the Kororoit Creek corridor is a further item to verify, as is the build era of the specific dwelling, since the suburb contains both ageing post-war stock and newer estate homes with different maintenance profiles.
PropertyRanker uses the SEIFA IRSAD reading as a primary input for three of its twelve scoring criteria: economic_strength, hazard_risk, and entry_point_risk. For Deer Park, the score of 974 (decile 5, 38th Victorian percentile) sits on the macro side of the model and sets a baseline for those three criteria. The remaining nine criteria draw on listing-level data that SEIFA cannot see, including current SQM vacancy, body corporate health, flood and overlay status, and pricing against recent comparable sales.
Cairnlea shares the 3023 postcode with Deer Park and sits within the same Brimbank LGA, so its SEIFA frame is closely related. Ardeer (3022) lies immediately to the east and is slightly closer to the Sunshine activity centre, which can influence both rental demand and comparable sales benchmarks. Investors comparing these suburbs should score individual listings in PropertyRanker rather than relying on postcode-level averages, as internal variation within each suburb can be as significant as the differences between them.
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