THE SANCTUM

BALMAIN, NSW

SECTOR

Residential, Restoration, Heritage

STATUS

Complete

COMPLETION YEAR

1999

ARCHITECT

Mayoh Architects

Overview

Transformation of a 150-year-old former schoolhouse into 12 loft-style residences while constructing three new pitch-roofed apartment buildings that added 22 contemporary units. Retaining the historic Thames Street façade, we blended heritage restoration with modern design to enhance residential density without compromising the precinct’s character. Delivered under a conversion and new-build contract, the project overcame significant structural and logistical challenges—including limited site access, basement excavation beneath the heritage structure, and complex support works—through precise planning and coordinated delivery.

Construction Features

Heritage Façade Conservation

Expert restoration of the existing schoolhouse frontage, preserving the original character on Thames Street

New-Build Apartment Blocks

Delivered three complementary buildings with pitched roofs and classical detailing, adding 22 contemporary units

Loft-Insertion Structure

Installed new internal floors, walls, windows, stairways, and a lift within the restored building to create 12 two‑level loft apartments

Basement Carpark & Shoring

Excavated and constructed two underground levels beneath the heritage building—requiring temporary propping along the rear western boundary