Does Aircraft Noise Suppress Property Prices, Growth, and Rents?
Abstract
We tested three questions: does aircraft noise suppress sale prices, capital growth, and rents? The study draws on nearly 8 million transaction records from 1990 to 2026. This includes paired resales for growth analysis and recent single sales for current price comparisons, plus suburb-level median prices and rents. Across 71,747 noise-zone resales and 1,063,172 nearby controls at seven Australian airports, we found that noise zones carry a modest price discount and slower growth, but rents hold firm. Around Sydney Airport, units inside noise zones sold for roughly 8% less than same-suburb units outside the boundary from 2024 to 2026. Growth trailed by 0.5% to 0.7% per year. But rents were not consistently suppressed, meaning noise-zone properties in cities like Tullamarine (Melbourne, VIC) and Forrestfield (Perth, WA) actually delivered higher gross rental yields than their neighbours. The penalty is not universal: Perth noise-zone properties outperformed, and the effect varies dramatically by airport.
Key Findings
- Sale prices: Noise-zone suburbs are about 2% cheaper than price-matched peers nationally (117 matched pairs, 2026 medians). Within suburbs around Sydney Airport, houses sold for roughly 10% less inside the noise boundary than outside from 2024 to 2026. Houses showed no clear price gap.
- Capital growth: Noise-zone properties grew 0.5% to 0.7% slower per year than nearby at Sydney, Adelaide, and Gold Coast airports from 1990 to 2026. Perth was the exception: noise-zone properties outperformed by roughly 0.4% per year over the same period.
- Rents are not consistently suppressed. Across 117 matched suburb pairs from 2004 to 2026, noise-zone suburbs charged slightly higher rents on average. Perth and Brisbane showed modest rent discounts (3-5% lower), but Sydney and Adelaide noise-zone rents were equal or higher.
- Yield opportunity. Because prices are slightly discounted but rents hold firm, noise-zone properties in Melbourne and Perth delivered higher gross yields (roughly 0.3% to 0.5% higher) than nearby non-noise suburbs as at 2026.
- Units are more affected than houses. Around Sydney Airport, apartments experienced about 60% more growth penalty than houses from 1990 to 2026, and a clearer price discount from 2024 to 2026.
- The gap is widening around Sydney. The growth penalty roughly quadrupled from the 1990s to the 2010s, consistent with doubling flight volumes and inner-city densification.
Methodology
Microburbs mapped official aircraft noise contour boundaries for 35 airports across six states, covering all major civilian airports and 16 defence airfields. These boundaries come from state planning authorities and represent the zones where governments impose building restrictions due to projected noise levels.
We classified every microburb in Australia (368,255 in total) as either inside or outside a noise zone. About 4,400 microburbs (roughly 1.2%) fall within at least one airport noise boundary, spanning 218 suburbs.
For the property-level analysis, we matched each resale transaction in our database against these boundaries. A property is classified as “noise-exposed” if its precise coordinates fall inside an official noise contour, and “control” if it sits within roughly 5 kilometres but outside the boundary. This gives us a nearby-area comparison: both groups are in the same broad area, but differ in noise exposure. The comparison is not perfectly controlled for distance from the CBD or local amenities, which is why we also run within-suburb tests (see Results).
For the suburb-level analysis, we matched each noise-affected suburb to three non-affected suburbs in the same metropolitan area with similar starting prices in 2004. We then tracked median house prices, capital growth, and rental yields through to 2026.
The study covers nearly 8 million transaction records from 1990 to 2026, including paired resales for growth analysis and recent single sales for current price comparisons. This makes it one of the largest property-level noise studies conducted in Australia.
Results
Airport-by-Airport Comparison
The effect of noise on growth varies dramatically by airport. The table below shows the annual growth differential between noise-zone and nearby properties from 1990 to 2026.
| Airport | Noise Zone Transactions | Control Transactions | Annual Growth vs Nearby | Confidence |
|---|---|---|---|---|
| Sydney (Kingsford Smith) | 29,705 | 260,135 | ~0.6% slower | Very high |
| Adelaide | 10,025 | 174,507 | ~0.7% slower | Very high |
| Gold Coast (QLD) | 9,734 | 71,881 | ~0.4% slower | Very high |
| Melbourne (Tullamarine) | 3,922 | 219,016 | ~0.3% slower | Moderate |
| Brisbane (QLD) | 1,323 | 53,880 | ~0.3% slower | Low (small sample) |
| Sunshine Coast (QLD) | 4,259 | 57,212 | ~0.2% slower | Low |
| Perth | 12,779 | 226,541 | ~0.3% faster | Moderate (fading in recent data) |
What That Looks Like in Dollar Terms
Small annual differences compound over long holding periods. To illustrate:
- Mascot (Sydney, NSW) had a median house price of $669,000 in 2004. By 2026 it reached $2,140,000. Had it grown at the same rate as the typical non-noise Sydney suburb, it would have reached roughly $2,260,000 over the same 22 years. The gap: about $120,000, or roughly 5% of the property’s final value.
- Tullamarine (Melbourne, VIC) started at $250,000 in 2004 and reached $759,000 by 2026. The Melbourne-median counterfactual: $859,000. That is roughly $100,000 in foregone equity over 22 years, or about 12% of the final value.
Now the counter-example:
- Forrestfield (Perth, WA) started at $161,000 in 2004. It sits inside Perth Airport’s noise zone. By 2026, it reached $880,000, roughly $185,000 ahead of where it would be if it had grown at the Perth median over the same period. The Forrestfield-Airport rail link, combined with new housing estates, drove growth that overwhelmed any noise discount.
The Penalty Is Getting Worse Around Sydney Airport
Note: Sydney Airport’s noise boundary was digitised from a planning document rather than official geographic data. The estimates below are directionally reliable but carry slightly more uncertainty than other airports.
Around Sydney Airport, the gap between noise-zone properties and their neighbours has widened over time. For houses specifically, noise-zone properties grew about 0.2% slower than nearby in the 1990s (from 1990 to 1999). By the 2010s (2010 to 2019), that gap had roughly quadrupled. Flight volumes at Sydney Airport doubled between 1995 and 2019, and inner-city densification pushed thousands more residents into noise-affected microburbs.
For apartments, the penalty is about 60% larger than for houses over the same periods. This fits expectations. Apartments have less sound insulation and no backyard buffer. The 2010s apartment boom around Mascot (Sydney, NSW) and Erskineville (Sydney, NSW) flooded the noise zone with new supply.
Suburb-Level Comparison: 117 Matched Pairs
We matched each noise-affected suburb to three comparable suburbs in the same city. Over 22 years (2004 to 2026):
| City | SUA | Matched Pairs | Noise Suburbs Grew | Noise Rents Were |
|---|---|---|---|---|
| Sydney | Sydney | 18 | ~0.5% slower/yr | About the same |
| Melbourne | Melbourne | 20 | ~0.5% slower/yr | About the same |
| Perth | Perth | 17 | About the same | About 3% lower |
| Adelaide | Adelaide | 26 | About the same | About 5% higher |
| Brisbane | Brisbane | 12 | About the same | About 5% lower |
| Regional NSW | Various | 9 | About the same | Higher |
| Regional QLD | Various | 14 | About the same | Higher |
The growth penalty only reaches statistical significance in Sydney and Melbourne. In other cities, noise-zone suburbs perform indistinguishably from their matched peers. Rents are not consistently suppressed. In Adelaide and regional areas, noise-zone suburbs actually command higher rents, likely because the noise zone overlaps with inner-city suburbs close to employment centres.
Sale Price Suppression
Do noise-zone properties sell for less? The answer depends on how you measure it. Nationally, noise-zone suburbs are slightly more expensive in raw terms (about 3% higher median house prices as at 2026) because noise zones overlap with expensive inner-city suburbs. But when we match each noise suburb to comparable suburbs in the same city, the picture flips. Noise suburbs are about 2% cheaper than their matched peers.
The clearest signal comes from within-suburb comparisons around Sydney Airport. Looking at sales from 2024 to 2026, properties inside the noise boundary sold for meaningfully less than properties in the same suburb but outside the boundary:
| Suburb | SUA | Noise Zone Median | Same-Suburb Control | Discount |
|---|---|---|---|---|
| Brighton-Le-Sands | Sydney | $847,250 | $1,655,000 | -49% |
| Monterey | Sydney | $795,000 | $1,451,000 | -45% |
| Erskineville | Sydney | $1,170,000 | $1,760,000 | -34% |
| Redfern | Sydney | $1,262,500 | $1,335,000 | -5% |
| Newtown | Sydney | $1,420,000 | $1,500,000 | -5% |
These are large discounts. A property inside the noise boundary in Erskineville (Sydney, NSW) sold for roughly a third less than one outside the boundary in the same suburb from 2024 to 2026. Note that the “control” properties are often a different mix (more houses, fewer new-build apartments), so part of this gap reflects property type, not just noise. Houses show a much smaller within-suburb gap than units.
Rents and Rental Yields
The most surprising finding: rents in noise zones are not consistently lower. Across the 117 matched suburb pairs (2004 to 2026), noise-zone suburbs charged about 2% more rent on average than their matched peers. The result varies by city:
| City | SUA | Noise-Zone Rent vs Nearby | Noise-Zone Gross Yield | Non-Noise Gross Yield |
|---|---|---|---|---|
| Sydney | Sydney | About the same | 2.7% | 2.8% |
| Melbourne | Melbourne | About the same | 3.7% | 3.4% |
| Perth | Perth | About 3% lower | 4.4% | 3.8% |
| Adelaide | Adelaide | About 4% higher | 3.3% | 3.5% |
| Brisbane | Brisbane | About 5% lower | 3.6% | 3.3% |
In Melbourne and Perth, noise-zone properties deliver notably higher gross yields (roughly 0.3% to 0.6% more) because prices are discounted more than rents. A buy-and-hold investor focused on cash flow rather than capital growth may find noise-zone suburbs attractive, particularly around Tullamarine (Melbourne, VIC) and Perth Airport’s eastern suburbs.
Defence Against Criticism
“You’re comparing different types of suburbs”
Fair point. The control group includes all nearby properties within a radius, not just properties at the same distance from the CBD or with the same amenities. We address this with within-suburb tests. In 8 of 11 testable suburbs near Sydney Airport, properties inside the noise boundary underperformed those outside it in the same suburb (1990 to 2026). The Perth counter-example shows this is not universal, but the Sydney within-suburb result is hard to dismiss.
“The noise contours may be out of date”
The noise boundaries represent current or recently published planning forecasts (2022 to 2039 depending on the airport). We apply them to transactions going back to 1990. A property sold in 1995 may have experienced a different noise footprint. This matters most for the decade-by-decade trend: the 1990s result should be interpreted cautiously. The core finding, that the gap exists and is widening, holds regardless of the exact 1990s magnitude.
“Correlation is not causation”
Correct. This study demonstrates a statistical association, not a causal relationship. Noise zones often overlap with industrial land, flight-path corridors, and lower-amenity areas. The Perth result is the clearest demonstration: noise zones can coincide with high-growth areas when transport infrastructure and new housing dominate. We do not claim that noise alone causes the growth gap. We claim that noise zones are a useful risk indicator for investors, and that the indicator behaves differently in different cities.
Limitations
- Sydney data quality. The noise boundary for Sydney Airport was derived from a planning document rather than official geographic data. This affects roughly one-quarter of the total dataset. Results for Sydney should be treated with slightly more caution than for other airports.
- Missing airports. Cairns (QLD), Hobart (TAS), Launceston (TAS), Canberra (ACT), and Darwin (NT) are not yet covered. The study covers the five largest capital city airports but does not yet include every regional airport.
- No causal design. A true causal test would require a natural experiment, such as comparing growth before and after a change in flight paths. This study uses a cross-sectional comparison.
- Same-property repeats. The same property can appear more than once in the dataset (bought and sold, then bought and sold again). This means individual transactions are not fully independent.
Conclusion
Aircraft noise affects three dimensions of property performance differently. Sale prices carry a modest discount (about 2% nationally against matched peers, and up to 35% for units within specific Sydney suburbs from 2024 to 2026). Capital growth trails by 0.5% to 0.7% per year at Sydney, Adelaide, and Gold Coast airports from 1990 to 2026, compounding to roughly $100,000 in foregone equity on a typical Melbourne house over 22 years (2004 to 2026). But rents hold firm, creating a yield premium in noise zones around Melbourne and Perth as at 2026.
The story is not simple. Around Forrestfield (Perth, WA) and Caversham (Perth, WA), noise-zone properties outperformed from 2004 to 2026. Defence airfield suburbs grew faster than surrounding areas over the same period. The effect varies dramatically by airport, by city, and by property type.
For investors, the practical implication: noise zones create a small but persistent price discount without a matching rent discount. That is a yield opportunity for buy-and-hold investors. It is a growth risk for capital-gains-focused buyers, particularly around Sydney Airport where the penalty is widening. Check whether a property falls inside an official noise contour, but weigh it against transport infrastructure, supply dynamics, and the specific airport. The noise zone is one signal in a much larger picture.