Sydenham to Bankstown Rezoning Push Could Reshape Sydney's Inner-South for a Generation

State planners are advancing a rezoning proposal that would allow buildings of up to 22 storeys along a stretch of the T3 Bankstown Line between Sydenham and Bankstown, a corridor that housing economists say has sat frozen in low-density amber for decades while Sydney's median house price climbed past $1.4 million. The Department of Planning, Housing and Infrastructure has been working through submissions on revised precinct plans for stations including Marrickville, Dulwich Hill, Hurlstone Park and Campsie, with formal determinations expected before the end of 2026.

The timing is deliberate. The NSW Government's Transport Oriented Development program, which mandates denser housing within 400 metres of certain train stations, is now in force across dozens of Sydney suburbs. The Sydenham-to-Bankstown corridor sits within the program's scope, meaning councils along the line, Canterbury-Bankstown City Council chief among them, face pressure to either align their local environment plans with state targets or risk the department stepping in with its own planning controls.

What the Maps Actually Show

Draft precinct plans for Campsie station, located on Canterbury Road in Canterbury-Bankstown LGA, show land currently zoned R2 Low Density Residential shifting to MU1 Mixed Use and R4 High Density Residential. Tower envelopes of between 15 and 22 storeys are proposed within the immediate station catchment, stepping down to eight to twelve storeys further along Beamish Street and around the Campsie CBD. At Marrickville, where Inner West Council has jurisdiction, proposed heights are lower, generally six to ten storeys, but the affected area is larger, taking in parts of Illawarra Road and Marrickville Road that currently carry a patchwork of two-storey shops and interwar terraces.

For the broader Dulwich Hill precinct, which sits at the intersection of the T3 and the light rail network, planners are proposing a mid-rise transition zone that would allow seven-storey residential flat buildings on lots currently zoned for townhouses. Dulwich Hill's existing median unit price is tracking around $850,000, based on recent sales data reported through the first half of 2026, and agents working the suburb say developer interest has been building for months ahead of any formal determination.

The NSW median house price has now held above $1.4 million for consecutive quarters, making the inner-south corridor, priced well below the Northern Beaches and Inner West premium pockets like Balmain or Newtown, an obvious magnet for both first-home buyers and institutional build-to-rent operators. Canterbury-Bankstown LGA recorded more development applications in 2025 than any other council area in Greater Sydney, a figure cited in the department's own monitoring reports.

The Sticking Points

Not everyone is ready to welcome the cranes. Resident groups in Hurlstone Park, a leafy pocket between Canterbury and Dulwich Hill stations, have raised concerns about heritage streetscapes along Crinan Street and the adequacy of existing water and stormwater infrastructure. The relevant submissions lodged with the department during the public exhibition period last autumn ran to hundreds of pages, with objections focused on school capacity at Canterbury Girls High School, which is already operating above its design enrolment.

Developers, for their part, are watching construction cost pressures closely. Concrete and labour costs remain elevated across Sydney, and several apartment projects approved under earlier Bankstown City Centre rezoning decisions from 2016 are only now entering the market, a reminder that planning approval and actual delivery can be separated by years.

For buyers and investors trying to work out what to do before decisions land, the practical calculation is fairly straightforward: sites within 400 metres of Campsie, Marrickville and Dulwich Hill stations are already attracting uplift premiums in off-market sales, meaning the rezoning value may already be partly priced in. Anyone holding land in the affected precincts should seek formal planning advice before the end of 2026 determination window, after that, the rules, and the price benchmarks, will look different.

This article is general information only and is not personal financial or investment advice. Consider your own circumstances and seek licensed professional advice before making financial decisions.