North Sydney is one of Australia's biggest office markets outside a capital CBD, a cluster of towers around the Pacific Highway and Miller Street. A lot of that stock dates from earlier office booms, so tired chillers and dated plant are common.

What the public energy register says about the commercial buildings in North Sydney (2060):
Pick a trade and we sort North Sydney worst-first for you. Each building gets a personalised piece of mail with your name on it.
New to this? Read what a NABERS rating tells you about a building's HVAC or why a 2-star building is a goldmine.
20 of 66 commercial buildings on the public energy register in North Sydney (2060) are rated 2.5 stars or worse, which is a strong signal of old, inefficient heating and cooling.
We sort North Sydney's buildings worst-first from the public NABERS and Commercial Building Disclosure register, then post each low-rated building a personalised card showing its rating and what an upgrade could save, with your name and a QR code.
Yes. The ratings are real, measured, and public, licensed for reuse (CC BY 3.0 AU). The mail is addressed to a role like The Facilities Manager, not a named person, which keeps it outside the Spam Act.
From $6 a piece, print and postage included. You approve every piece before you pay, and you can start with a single building.
More in NSW: Sydney CBD · Parramatta · Chatswood · Macquarie Park · St Leonards · Surry Hills · all cities
Counts from the public NABERS / Commercial Building Disclosure register, CC BY 3.0 AU. Aggregate figures only, building identities are not shown.