Sewage Pumping Station 27, Heritage sewage pumping station in Callan Park, Australia.

Sewage Pumping Station 27 is a decommissioned low-level sewage pumping station in Callan Park, Rozelle, built in 1911–12. Its single-storey Federation Romanesque superstructure has random-course picked sandstone walls, a hipped corrugated iron roof with a timber louvered ventilator, and multi-paned timber sash windows with dressed sandstone surrounds. A recessed panel above the double timber door reads "MBWS & DB 1911". The site is enclosed by a brick dwarf wall and 1.8 m cyclone fence on three sides.

Built between 1911 and 1912 by the Metropolitan Board of Water Supply and Sewerage, the station formed part of Sydney's early sewerage system infrastructure. It operated for more than 80 years before being decommissioned in 1997 and later restored through conservation efforts.

The station's Federation Romanesque sandstone superstructure was designed to be sympathetic with the nearby Kirkbride block of Callan Park Hospital, lending stylistic continuity to the complex. The building is decommissioned and enclosed by a brick dwarf wall with a 1.8-metre cyclone fence on three sides, so it is not open to visitors.

The station stands on the southern side of King George Park in Callan Park, Rozelle, overlooking Iron Cove. It is decommissioned and closed: a brick dwarf wall and a 1.8 m cyclone fence enclose three sides of the site, with a natural sandstone outcrop on the fourth. The building can be viewed from outside only, so plan to see it on a walk through the park rather than as an interior visit.

The building is closed and fenced off, so the interior timber trusses arranged in a cruciform pattern around the ventilation shaft cannot be seen by visitors. What can be spotted from outside is the recessed sandstone panel above the door, inscribed "MBWS & DB 1911".