Petrie Terrace Police Depot is a heritage-listed former police barracks at 25–61 Petrie Terrace, Petrie Terrace, City of Brisbane, Queensland, Australia. It was built from 1850s to 1960s. It was added to the Queensland Heritage Register on 23 July 1999.

The site was vacated by the police in the mid-1980s and sold in 1987. The police barracks remained unused for two decades, while the two other surviving buildings saw alternate uses for some years. In 2007–08, the entire site was redeveloped as a commercial and retail precinct known as "The Barracks".

History The site of the former Petrie Terrace Police Depot occupies the southwest edge of a ridge formerly known as Green Hills, which overlooks the former Roma Street railway yards and the Brisbane central business district. The place has been associated with penal and police activity in Queensland since the 1850s. The site was occupied by the second purpose-built Brisbane Gaol from November 1860 until July 1883, and functioned as a police barracks from 1885 until the mid-1980s. Within the former Petrie Terrace Police Depot, the former Police Barracks, opened in September 1939, is a highly visible and prominent landmark in Brisbane.

The site was early associated with a penal facility. When Moreton Bay was opened to free settlement in February 1842, the only prison accommodation available was at one end of the former military barracks in Queen Street – the remainder of the building was occupied by storekeepers. In the second half of 1847 the former female factory in Queen Street, which had served as an immigration barracks for some years, was refurbished as a gaol. This was a temporary measure until Brisbane's first purpose-built gaol was erected in 1848–49. However, within a few years the construction of a larger gaol complex was considered necessary.

By 1856, a gaol reserve had been proposed in the vicinity of what is now Petrie Terrace – the area known in the 1850s as Green Hills. The site was considered remote, well-drained, healthy and extendable. In 1857 the New South Wales Colonial Architect provided plans for a gaol to accommodate nearly 100 prisoners at Green Hills. The contract was let in mid-1858 to Andrew and John Petrie of Brisbane – their name being commemorated in Petrie Terrace – who submitted a tender of . Construction commenced in October 1858, and was completed by September 1860, when the complex was proclaimed as the Brisbane Gaol. The buildings were masonry, and included 2 two-storeyed cell blocks; 2 two-storeyed guard houses containing offices, warders' room and store rooms, flanking the main entrance to the gaol (which faced southeast, overlooking the Town of Brisbane); kitchen block; washhouses; and lavatory blocks. The gaol reserve was enclosed by a wooden fence, which was replaced in 1862 by a high stone wall, constructed by contractor Joshua Jeays of Brisbane. Stone for the gaol wall was obtained from the Woogaroo Quarry.

Almost from its inception, the Brisbane Gaol on Petrie Terrace was overcrowded. By 1865, overflow prisoners were being accommodated on the hulk Proserpine, anchored at the mouth of the Brisbane River, and in 1867 the decision was taken to convert the quarantine buildings then under construction on St Helena Island, in Moreton Bay, into gaol buildings. St Helena was gazetted as a prison in the same year, and operated in tandem with the Brisbane Gaol on Petrie Terrace. In 1870 the female prisoners at Petrie Terrace were relocated to the Toowoomba Gaol. These measures afforded only temporary solutions to the overcrowding at the Brisbane Gaol, and in the late 1870s plans for the new Boggo Road Gaol in South Brisbane were prepared. This complex was constructed in the early 1880s and completed in 1883, with the gaol on Petrie Terrace closing on 2 July 1883.

The colonial government initially intended that the Queensland Defence Force, which was reorganised and expanded in the mid-1880s following the "Russian scare" of 1883, should occupy the former Petrie Terrace gaol reserve, along with the adjacent former military barracks, which had been established in 1864 to accommodate a small contingent of Imperial troops, but which had been occupied since 1874 by the Queensland Police Force.

However, in 1885 the gaol reserve on Petrie Terrace was divided between the newly established permanent Queensland Defence Force and the Queensland Police Force. The QDF occupied the 1864 military reserve and the northern end of the gaol reserve, the whole of which was renamed Victoria Barracks by mid-1885. The Queensland Police Force occupied the remainder of the gaol reserve on Petrie Terrace, as a police depot and training centre. At this time the former guard houses and a block which contained the chapel, kitchen and workshop, were renovated as quarters and offices for the police, but the former cell blocks were demolished. The police occupied the former gaol reserve for a century, from 1885 until the mid-1980s, although the site was not officially gazetted as a reserve for police purposes until 1901.

The re-use of the gaol reserve for police and military purposes necessitated the demolition of the surrounding stone wall, most of which was removed in 1885, although the arched stone entrance gate on the southeastern perimeter remained until the mid-20th century. The stone was recycled and used on various government projects in Brisbane, including the foundations supporting the iron palisade separating Queen's Park (now part of the City Botanic Gardens) in Alice Street. It is understood that the stone base to the surviving fence along Petrie Terrace at the former Petrie Terrace Police Depot, and the stone retaining wall between the Defence and Police Reserves, are constructed from fabric from the 1862 wall.

In the 1880s, as the Queensland economy boomed and new districts were opened to settlement, the number of men recruited into the Queensland police force increased significantly. Recruits received a brief period of training at the Petrie Terrace Police Depot, where facilities were strained. Along with recruits, the depot accommodated probationary officers and unmarried officers serving in the Brisbane area. In 1889, the police barracks at Petrie Terrace was described as a very bad barracks, damp in wet weather, without a washhouse or proper earth closets, and overcrowded. Despite the poor conditions, prior to 1901 only minor alterations and additions were made to the depot buildings.

In the period 1895 to 1925 the Queensland population almost doubled. The Queensland Police Force, while not quite matching this growth rate, increased by one third, especially after 1910, when pay and conditions for police officers improved. In the first two decades of the 20th century a number of new structures were erected at the Petrie Terrace Police Depot to accommodate the increase. These included: a washhouse near the southern boundary of the reserve (timber, 1901, since demolished) a residence for the Police Drill Instructor at the southwest corner of the reserve near the junction of Roma Street and Petrie Terrace (timber, 1907, demolished) a dormitory block at the northeastern end of the reserve, near the Victoria Barracks boundary (2-storeyed, timber, 1907, demolished) a stables building in the northern corner of the reserve, abutting Petrie Terrace and the boundary with Victoria Barracks (brick, 1912, extant) extensive additions to No.2 dormitory block (the former gaol kitchen and chapel building) at the southern end of the reserve (1914–15, since demolished)

The 1912 brick stables building contained stables for 40 horses, harness room and feed room. The building was E-shaped with external dimensions of . As motor vehicles gradually replaced horses in police work, alterations to the stables building were undertaken in 1927 to provide some garage accommodation, and in 1936 a substantial brick garage and workshop was erected between the 1912 brick stables building and the 1907 timber dormitory block. At this period the 1912 stables still contained 15 loose boxes and 16 stalls.

In the late 1930s, following decades of police complaint that the buildings at Petrie Terrace were totally unsuitable for police purposes, the Queensland Government finally resolved to address police accommodation at both the Petrie Terrace Police Depot and the Roma Street Police Station and Barracks – the latter erected in 1879, and by 1899 considered inadequate. Early in 1938, work commenced on construction of a new three-storeyed, brick and concrete police barracks at the Petrie Terrace Police Depot, on land formerly utilised as a parade and drill ground. It was intended to accommodate recruits, probationers and single officers stationed at Petrie Terrace, Roma Street, and the Traffic and Criminal Investigation branches in Brisbane. At this period, single officers still were obliged to reside in barracks. When the new barracks were completed in 1939, however, it was occupied only by probationers and single officers – recruits were accommodated in the 1907 timber barracks.

The design for the new barracks was developed after extensive consultation with officers of the Queensland Police Force, with consideration given to providing commodious quarters for unmarried men, and taking advantage of the prominent ridge site to establish a distinctive and forceful presence as a sentinel building overlooking the centre of Brisbane and to the major arterial road of Petrie Terrace. The ground floor comprised offices, store, armoury, guard room, lecture theatre with folding partitions, kitchen and mess. The second and third floors contained bedrooms, bathrooms, drying rooms, and recreation rooms, and accommodated 100 unmarried officers. The first floor contained 18 two-men bedrooms and 4 three-men bedrooms and the second floor accommodated 18 two-men bedrooms and 8 three-men rooms. Every effort was made to provide maximum privacy for the occupants, and to admit as much light and air as possible. The warm Brisbane climate was accommodated with verandahs and balconies on each floor. The building was constructed largely of fireproof materials (brick and cement and fibrous-cement roofing tiles), and enclosed escape stairs were provided at each end of the building.

When the barracks was officially opened on Friday 29 September 1939 by the Minister for Health and Home Affairs Ned Hanlon, it was considered one of the best investments that the Government had made; it would enhance the reputation of the force and give dividends daily in efficient service. The Architectural and Building Journal of Queensland considered that the new barracks represented the new idea in the construction of public buildings, that they were not "institutional" in their appearance, and that they were impressive in their architectural line and mass of brickwork, and the tiled roof makes the building a prominent landmark.

The Police Commissioner, in his report for the year ended 30 June 1939, stated of the new depot barracks: "It is at this centre that a member of the Police force receives his early training prior to his admission as a constable, as well as his accommodation in the early years of his official life. Environment has a great influence on the future career of any person, and it is felt that the change in accommodation as well as the increased facilities for training will benefit both the public and the administration."