Sydney Council Backs Affordable Housing Requirements for New Developments

Sydney's planning authority voted 8-3 this week to enforce a minimum affordable housing contribution on new residential developments taller than 20 storeys or containing more than 100 dwellings. The rule, which comes into effect in September, mandates that 15% of units in qualifying projects be made available as affordable rental homes for at least 15 years. For a 200-apartment building, that means 30 homes locked in below-market rent.

The vote happened against a backdrop of severe housing stress across greater Sydney. The latest ABS quarterly report shows median rent for a two-bedroom apartment in inner Sydney hit $2,480 in June-up 22% from two years ago. Young workers, key service sector staff, and families on modest incomes have increasingly moved west and south-west, stretching commute times. The council's planning committee heard testimony from two local housing advocates who documented that a single-income household earning $70,000 annually can now afford only 15% of available rentals in Parramatta, well below the sustainable threshold of 30%.

What the rule means for Sydney residents

The affordable housing requirement applies to new projects in designated priority areas: the eastern suburbs, Parramatta, Chatswood, and Penrith corridors. Developers have two paths: build the affordable units themselves, or contribute cash to a council fund. For residents, this creates a direct outcome: more rental options at reduced cost, though still pegged to approximately 80% of market rent rather than deeply subsidised public housing. A one-bedroom apartment currently renting at $450 per week in a new Parramatta tower would be offered at roughly $360 under the affordable bracket.

The mechanism operates via a condition of development approval. When a developer lodges plans for a 150-unit project in Chatswood, the council now issues a requirement: deliver 22 or 23 affordable units at the specified rental level, or pay $2.8 million into the affordable housing fund instead. That fund money goes directly to council to acquire or lease existing properties for affordable rental. Developers told the planning committee that the requirement adds roughly 3-5% to project costs, a figure they said they will absorb rather than pass fully to purchasers of market-rate apartments.

The numbers and what comes next

Council staff projected the rule will generate 1,900 to 2,100 affordable rental homes over the next five years if development approvals continue at current rates of approximately 420 new-dwelling applications annually in the priority zones. The NSW government's 2025 housing strategy identified a shortfall of 84,000 homes across greater Sydney by 2036; council documents frame this rule as a partial response rather than a solution. The Grattan Institute has previously found that mandatory inclusionary zoning of 15% is moderate by international standards-Melbourne's inner council areas require 20-25%-but sits above the threshold developers said they could absorb without reducing project viability.

Dissenting councillors from the property development industry representatives expressed concern that the requirement might slow approvals in inner suburbs where land costs are highest. Four developers requested a 12-month transition period, citing contracts signed before the rule's announcement. Council voted to grant three months' transition for projects already under assessment. From September onward, every major residential planning application must include the affordable housing component unless the developer opts for the cash contribution path.

The rule does not apply to social housing (which remains the domain of the NSW Housing Commission and federal funding), nor to small boutique developments under 100 units. It also excludes commercial-residential mixed-use projects where residential makes up less than 50% of floorspace. Enforcement sits with council compliance officers, who will audit rental agreements and occupancy at five-year intervals to ensure affordable rents are maintained. The first affordable homes from this requirement are expected to come online by mid-2027, once approvals process and construction begins.