A report by the Grattan Institute suggests that the abolition of mandatory minimum car parking requirements for new residential developments would significantly reduce housing costs and increase dwelling supply in major Australian cities.

Grattan Institute 的一份報告指出，取消新住宅開發計畫中強制性的最低停車位要求，將能顯著降低房屋成本並增加澳洲主要城市的住宅供應。

The current regulatory framework, established in the 1950s, mandates that developers provide a minimum number of off-street parking spaces per unit. This institutional requirement has resulted in a systemic misalignment between infrastructure supply and actual demand. Data indicates that approximately 40% of parking spaces in capital city apartments remain unoccupied nightly, with 40% of studio or one-bedroom residents and 19% of two-bedroom residents not owning vehicles. In certain middle-ring suburbs of Sydney, Melbourne, and Brisbane, the volume of available parking spaces exceeds the number of registered vehicles.

現行的監管框架建立於 1950 年代，規定開發商每戶單位必須提供最低數量的戶外停車位。這項制度要求導致了基礎設施供應與實際需求之間的系統性失調。數據顯示，州首府城市公寓中約 40% 的停車位每晚處於空置狀態，其中 40% 的套房或一房單位住戶以及 19% 的兩房單位住戶並不擁有車輛。在悉尼、墨爾本和布里斯本的某些中環郊區，可用停車位的數量甚至超過了登記車輛的數量。

Financial analysis demonstrates that these mandates impose substantial capital expenditures on developers, which are subsequently transferred to consumers. For a typical two-bedroom apartment, the added costs are estimated at $70,000 in Sydney, $62,000 in Melbourne, $113,000 in Brisbane, $95,000 in Adelaide, and $137,000 in Perth. The Grattan Institute posits that these costs often serve as the decisive factor in the commercial viability of projects. Consequently, the removal of these constraints could render up to 140,000 additional dwellings viable in Sydney and Melbourne alone.

財務分析顯示，這些強制要求給開發商帶來了巨額的資本支出，而這些成本隨後被轉嫁給消費者。對於一個典型的兩房公寓，增加的成本估計在悉尼為 70,000 美元、墨爾本 62,000 美元、布里斯本 113,000 美元、阿德萊德 95,000 美元，以及珀斯 137,000 美元。Grattan Institute 指出，這些成本往往是決定項目商業可行性的決定性因素。因此，取消這些限制可能會使單單在悉尼和墨爾本就增加多達 140,000 戶可行的住宅。

To mitigate the potential for increased on-street congestion, the report proposes a transition toward residential parking permit schemes and the 'unbundling' of parking rights. This latter approach would allow parking spaces to be leased or purchased independently of the residential unit. While some local governments have marginally reduced these requirements, the report advocates for a total repeal of parking minimums, suggesting that state governments should intervene to override local council authority, citing New Zealand's 2020 policy shift as a precedent. Such a transition is estimated to prevent the construction of 86,000 unnecessary spaces over five years, yielding a projected saving of $5.2 billion.

為了減輕路邊擁堵增加的可能性，報告建議轉向住宅停車許可方案以及停車權的「解構」。後者將允許停車位獨立於住宅單位之外進行租賃或購買。雖然部分地方政府已略微降低了這些要求，但報告主張完全廢除最低停車位要求，並建議州政府應介入以否決地方議會的權限，並引用紐西蘭 2020 年的政策轉向作為先例。據估計，這種轉型可在五年內避免建設 86,000 個不必要的停車位，預計可節省 52 億美元。

The current situation involves a conflict between legacy planning regulations and contemporary urban mobility trends, where the removal of parking mandates is proposed to enhance housing affordability and supply.

目前的狀況涉及舊有規劃法規與現代城市移動趨勢之間的衝突，因此建議取消停車強制要求，以提升住房的可負擔性與供應量。