Mambourin (VIC 3024) in Focus 2026: Is It a Good Investment? R-Score 95/100, 3.5% Yield & Best Streets

Market Classification: High-Supply Growth Corridor (Street Selection Critical) · R-Score: 95/100 (National Rank #842 of 15,286) · Street Average: 94/100 across 126 streets.

On the surface, Mambourin attracts heavy buyer attention because of its $662,500 entry point and modern housing stock. However, council-wide building approvals in Wyndham are running at 4.3% of existing stock. In high-supply corridors like this, buying a generic new-build on the fringe exposes you to years of competing stage releases. The only way to outperform the Mambourin median is to buy established homes on tightly held, 75–100 scored owner-occupier streets where land is already built out.

“I would not treat the 0% vacancy rate as permission to stretch on price. With rents at $450 a week and estimated cashflow at negative $327, I’d use the strong 83% owner-occupation reading to narrow the street shortlist, then stress-test the holding cost.”

Looking for the live, monthly-updated numbers? The Mambourin (VIC) suburb profile tracks the current median house price, rent, vacancy and R-Score, and the Mambourin street-by-street scores rank every street. This article is our investment analysis of what those numbers mean.

Below is our full October 2026 quantitative and street-level breakdown for Mambourin (VIC 3024), combining 36 months of settled price and rental history from our Aurora research warehouse, council-level supply and employment data for Wyndham (VIC), and block-by-block ABS 2021 Census SA1 tenure and yield rankings across 2,704 residential addresses.

1. Mambourin (VIC) 3-Year Market Trajectory & 27-Indicator R-Score (October 2026)

Over the past 12 months, Mambourin’s median house price moved +3.8% (from $638,000 to $662,500), bringing its 3-year cumulative price movement to +1.5% (from $653,000 three years ago). On the rental side, median weekly asking rents moved -2.2% over the past year to $450/wk (+26.6% over 36 months), equating to a 3.5% gross rental yield. Compared with 12 months ago—when Mambourin carried an R-Score of 95/100—its current composite R-Score of 95/100 represents a +0-point shift in underlying market pressure.

Indicator / R-Score Pillar	Mambourin (VIC) Current	12-Month / 36-Month Context
Composite Suburb R-Score	95 / 100	Ranked #842 of 15,286 suburbs (was 95/100 12m ago)
Median House Price	$662,500	12m change: +3.8% · 36m change: +1.5%
Median Weekly Rent & Gross Yield	$450/wk (3.5%)	12m rent change: -2.2% · 36m rent change: +26.6%
Rental Vacancy & Days on Market	0% vacancy	Median selling time: 76 days on market (1.5% vacancy is the tight-market line)
Pillar 1: Buyer Demand	36 / 100	Measures days-on-market compression, vendor discounting & sales velocity
Pillar 2: Supply & Ownership	90 / 100	Measures stock on market, building approvals vs stock & owner-occupier share
Pillar 3: Price Momentum	74 / 100	Measures short/medium-term price velocity vs Wyndham & VIC
Pillar 4: Yield Pressure	47 / 100	Measures gross rental yield, rent trajectory & vacancy compression

2. The “Two-Speed Suburb” Test: Best & Worst Streets in Mambourin (VIC)

Why do two 4-bedroom houses in Mambourin achieve completely different bank valuations and tenant quality? Because suburb medians blend every pocket together. When we map all 2,704 addresses across 126 streets in Mambourin through G-NAF to their ABS 2021 Census SA1 blocks, the suburb splits into three distinct tiers:

• Strong Street Profile (Score 75–100): 100 streets (100% of scored streets) pass both ABS Census tenure tests (owner-occupiers >65% and public housing ≤5%) plus at least one—or both—of the Mambourin rent and yield benchmarks.
• Mid / Mixed Street Profile (Score 50–74): 0 streets pass the core owner-occupier and public-housing thresholds but sit below the suburb median on weekly rent or yield.
• Weaker / Caution Street Profile (Score 0–25): 0 streets fail one or both census tenure thresholds—meaning either owner-occupation sits at or below 65% or state/community public housing exceeds 5% on those specific SA1 blocks.

Top 5 Highest-Scoring Streets in Mambourin (VIC)

These streets sit in SA1 census blocks with high homeowner pride of ownership, minimal social housing concentration, and strong block-level rents (inspect all 126 streets in Mambourin):

Top Street in Mambourin	Street Score	Addresses	Owner-Occupiers	Public Housing	SA1 Rent & Yield
#1 Merula Drive	100/100	50	83%	0%	$480/wk (4.1%)
#2 Thrums Road	100/100	30	83%	0%	$480/wk (4.1%)
#3 Nettle Street	100/100	25	83%	0%	$480/wk (4.1%)
#4 Shoal Circuit	100/100	19	83%	0%	$480/wk (4.1%)
#5 Karakul Street	100/100	13	83%	0%	$480/wk (4.1%)

3. Economic & Supply Drivers in Wyndham Council (Victoria)

Mambourin sits within the Wyndham Local Government Area, which has a residential population of approximately 347,830 (+12.8% population movement over the past 3 years) and 75,310 total dwellings. Three council-level fundamentals shape Mambourin’s medium-term outlook:

• Local Employment Diversity (ABS Census): The largest employment sectors across Wyndham are Retail Trade (13%), Transport, Postal and Warehousing (13%), Education and Training (10%), Health Care and Social Assistance (10%). Multi-sector employment reduces reliance on any single employer or commodity cycle.
• New Building Approvals vs. Existing Stock: Over the latest 12-month financial year, Wyndham approved 4.3% new dwelling stock (~4,147.704 dwellings). Because new approvals exceed 1.8% of stock, investors in Mambourin must avoid generic greenfield house-and-land pockets and stick to established, built-out streets.
• Tracked Infrastructure Pipeline: Wyndham currently has $13.0 billion in tracked major infrastructure projects (placing it in the 91th percentile of Australian councils).

4. Worked Cashflow, Deposit & 80% LVR Stress-Test for Mambourin (October 2026)

What does it actually cost to acquire and hold a typical house in Mambourin at today’s median price of $662,500 and median rent of $450/wk? Below is the baseline 80% Loan-to-Value Ratio (LVR) model we use to stress-test serviceability before shortlisting a property:

Cashflow & Capital Item	Mambourin Worked Figure	Assumptions & Notes
Purchase Price (Suburb Median)	$662,500	Settled house median as of October 2026
20% Deposit + Est. Stamp Duty & Costs	$164,300	$132,500 deposit (80% LVR) + ~$31,800 stamp duty, legal & inspection allowance (can be funded via usable home equity)
80% LVR Loan Amount	$530,000	Standard no-LMI investor loan threshold
Gross Annual Rental Income	$23,400/yr ($450/wk)	3.5% gross rental yield before vacancies and expenses
Est. Annual Interest + Operating Costs	$40,413/yr	Assumes 6.25% interest-only ($33,125/yr) + ~1.1% for council rates, insurance & property management ($7,288/yr)
Pre-Tax Weekly Cashflow Position	-$327/wk top-up	Before tax deductions / depreciation (confirm post-tax position with your accountant)

5. Who Should Buy in Mambourin—And 3 Rules Before You Make an Offer

Strong Buyer Activity Meets an Active New-Build Pipeline. Based on our October 2026 data, Mambourin is best suited to equity-backed homeowners and portfolio builders seeking a balanced entry price ($662,500) and 3.5% rental yield in VIC.

1. Never Buy Blind on the Suburb Median: In Mambourin, 0 streets score below 50/100 on our census tenure and yield tests. Always run the exact street through the Mambourin Street Score Hub and target the 100 streets scoring 75–100/100.
2. Check Lot-Level Overlays (Flood, Bushfire, Slope & Easements): Even on a 100/100 streetlike Merula Drive, individual lots can carry overland flow paths, steep gradients, or sewer easements that restrict granny-flat additions or spike insurance premiums.
3. Price Against Street-Matched Settled Comparables: Do not let a selling agent justify an asking price on a 25/100 street using comparable sales from a 100/100 street. Compare settled sales within the same SA1 Street Score band.