Is the pipeline at Sydney’s new aerotropolis oversupplied?

The opening of Western Sydney International Airport (WSI) in July 2026 is poised to have a transformative impact on the structure and function of Sydney’s property industry, stretching Sydney from the eastern-centric Harbour City to a three-city metropolis. The immediate impact of the opening will be on the industrial sector, as new greenfield development in the surrounding aerotropolis is incentivised by infrastructure links, lower land prices, and a favourable zoning environment.

With the existing South Sydney air corridor at-capacity and land constrained, the NSW government’s launch of the precinct masterplan in 2020 catalysed a shift in capital towards the aerotropolis. Competition from residential and other uses is driving industrial rents in the South Sydney suburbs of Alexandria and Botany to be the highest in the nation, with occupiers looking to WSI for greater value. Macroeconomic factors support this move, with the population of Western Sydney increasing 57.6% faster than the rest of Sydney over the past five years.

JLL has been tracking the development, take-up and delivery of industrial property in the suburbs adjacent to WSI. Q2 2026 pipeline stock sits at 2,350,000 sqm, with pre-lease activity concentrated in the suburb of Badgerys Creek.

O’Brien Glass was announced in May 2026 to be taking a purpose-built warehouse in Charter Hall’s WSI Business Precinct, scheduled to be one of the first completions in the aerotropolis. Other notable pre-commitments include Aldi’s fully automated, 100,000 sqm distribution centre in Bringelly, and DHL’s plans to develop and occupy four warehouses on its exclusive landholding in the Burrah Park estate.

Figure 1: Forecasted pipeline availability surrounding WSI

Source: JLL Research, NSW Planning Portal, 2Q26. Note P = pre-committed facility.

However, while occupier sentiment for airport-proximate warehouses is positive, JLL leasing data indicates that take-up has lagged pipeline supply. The pre-commitment rate for under construction stock sits at 51.5% as of Q2 2026, and with several industrial estates surrounding WSI submitted for state significant development approval over the previous 12 months, the share of proposed stock with pre-commitments has dropped from 28% to 12%. More positively, take-up in the WSI precinct has outperformed the absorption precedent of nearby Kemps Creek, where only 1% of proposed stock was committed at a similar development stage in Q1 2021. Over the following five years, 85% of stock by area was absorbed in Kemps Creek before completion.

Near-term pipeline absorption is additionally constrained by lingering availabilities from Sydney's 'speculative supply wave', where 1.5 million square metres (sqm) of speculative starts were launched between mid-2022 and mid-2025. Consequently, developers have begun to revert to a pre-commitment model for development, waiting for the security of a locked-in occupier before commencing construction. This shift will likely extend project timelines but moderate supply growth, enabling pipeline supply to be incrementally absorbed without exacerbating market conditions.

Ultimately, while from the outside the WSI development pipeline exhibits signs of near-term oversupply, positive occupier sentiment remains. The shift away from speculative construction suggests this is a timing mismatch rather than structural oversupply, with take-up volumes likely to catch up as developers extend project delivery timelines.