Licensing is the same across NSW: a licence for plumbing, draining or gasfitting work of any value, a contractor licence to contract for it, and Fair Trading guidance asking ads, websites included, for the licensee's name, licence number, category of work and a business phone. Our Sydney plumbers page explains those rules. What's unusual here is where the shire sits on the NSW Government's list of local plumbing regulators: in the same table as Sydney and Wollongong, with Building Commission NSW inspecting wherever Sydney Water provides the service and Wingecarribee Council inspecting wherever it doesn't. In the towns council supplies, that means council's MyInspect team.
Booking works by phone. Plumbers and builders register on council's booking site first, then ring to book, and council asks for bookings by 3pm on weekdays; same-day or next-day inspections can't be promised. For applications lodged through the NSW Planning Portal on or after 1 October 2025, the inspection charges are paid at lodgement, while older applications pay for each inspection when it's booked, along with any re-inspection. Bigger jobs, such as units or commercial buildings, also need hydraulic plans and a design certificate covering stormwater, sanitary drainage, water and fire services.
Sewer work is the busy part of the local story. Bowral's sewage treatment plant has had a $56 million upgrade: construction began in June 2023, and the NSW Minister for Water announced in July 2026 that the plant was commissioned, with 50 per cent more capacity and room for up to 7,000 more residents. Council paid $49.4 million of that and the NSW Government $6.6 million. Out in the streets, council spent January to July 2026 upgrading and renewing selected sewer mains in Moss Vale and Bowral, starting with high-pressure jet cleaning and CCTV and then relining pipes without digging wherever it could, and residents were asked to keep toilet lids shut, with a small weight on top, while their section was cleaned. Owners who watched that happen now know the word relining, so if you camera and reline private lines, say so.
Water restrictions haven't been needed since 1 March 2020, when record rain ended the last round, though council keeps its water-wise measures going all year. Off the sewer, the shire has thousands of on-site sewage systems, and the shire sits inside the Sydney drinking water catchment, and our Bowral and Mittagong tradies page covers the approvals and catchment rules behind that work. For gasfitters, Jemena lists the Southern Highlands among the regional areas its gas network supplies.
We're an Adelaide team on Hutt St, so we'd work with you by phone and email. We haven't built for a Highlands plumber yet. Send us your licence details, services, the towns and villages you cover and a few job photos, and we'll send back a draft link to look over on your phone. You pay once you approve it.