O'Brien Plumbing & Roofing delivers the full spectrum of licensed plumbing and roofing services across the Central Coast and Northern Sydney. Whether you need a 24/7 emergency plumber at 2am, a scheduled hot water system replacement, a full commercial roof restoration, or an ongoing strata maintenance contract, our qualified team operates from two permanent offices — Wyong and Hornsby — with a combined fleet that covers every suburb from Woy Woy to Berowra and from The Entrance to Pennant Hills.
Every job is performed by licensed tradespeople holding current NSW Fair Trading qualifications, backed by comprehensive public liability and professional indemnity insurance. We provide upfront pricing before work begins, written warranties on all labour and materials, and compliance certificates for every regulated installation.
Burst pipes, gas leaks, sewage overflows, and flooding cannot wait until business hours. Our emergency plumbers are on call around the clock, dispatched from the nearest office to minimise response time. We carry the parts and equipment needed to resolve most emergencies in a single visit — pipe repair clamps, isolation valves, gas fittings, drain clearing equipment, and common hot water components.
Tree root intrusion, grease build-up, and collapsed pipes are the leading causes of blocked drains on the Central Coast and in Northern Sydney. We diagnose the exact cause using CCTV drain cameras, then clear the blockage with high-pressure water jetting (up to 5,000 PSI). For recurring blockages, we provide pipe relining and root treatment solutions that prevent future failures without excavation.
We supply and install heat pumps, electric storage, gas continuous flow, and gas storage hot water systems from Rheem, Rinnai, Dux, Bosch, Thermann, Emerald, Stiebel Eltron, and Chromagen. All installations include removal of the old unit, full plumbing and electrical connections, tempering valves where required by code, and a NSW compliance certificate. We also repair and service existing systems — including anode replacements, thermostat adjustments, and relief valve replacements.
From a single cracked tile to a full Colorbond re-roof, our roofing team handles metal roofing, concrete and terracotta tile repairs, ridge capping repointing, valley iron replacement, and roof leak detection. We also provide roof painting and protective coatings to extend the life of ageing roofs. All work complies with AS 1562 (Design and Installation of Sheet Roof and Wall Cladding) and BCA requirements.
Hidden leaks inside walls, under slabs, and in underground supply lines cause thousands of dollars in damage before they become visible. Our leak detection service uses acoustic listening equipment, thermal imaging, and tracer gas to pinpoint the exact location of concealed leaks without destructive investigation. Once located, we repair the leak and document the findings for insurance claims where applicable.
Our licensed gas fitters (NSW gas fitting endorsement) install, repair, and certify gas appliances, gas bayonet points, gas line extensions, and commercial gas systems. We also provide gas leak detection using electronic sniffers and pressure testing to AS/NZS 5601. All gas work is certified and compliance certificates issued on completion.
We provide planned preventative maintenance contracts for commercial properties, strata buildings, schools, aged care facilities, and government assets. Our commercial maintenance service includes scheduled inspections, compliance reporting, asset condition assessments, and priority emergency response. We work with property managers, facilities managers, and body corporates to maintain plumbing and roofing assets cost-effectively over their full lifecycle.
Central Coast: Wyong, Tuggerah, Gosford, Terrigal, Erina, The Entrance, Bateau Bay, Woy Woy, Umina Beach, Kincumber, Avoca Beach, Toukley, Budgewoi, Long Jetty, Killarney Vale, Wamberal, Copacabana, Ettalong Beach, San Remo, Gorokan, Lake Haven, Charmhaven, Kanwal, Hamlyn Terrace, Woongarrah, Blue Haven, Tumbi Umbi, Berkeley Vale, Lisarow, Narara, Niagara Park, Point Clare, Wadalba, Noraville, Saratoga, East Gosford, and Erina Heights.
Northern Sydney: Hornsby, Waitara, Asquith, Normanhurst, Thornleigh, Pennant Hills, Wahroonga, Berowra, Mt Colah, Mt Kuring-gai, Brooklyn, Cowan, Galston, Dural, Cherrybrook, and Castle Hill.
Wyong Office: (02) 4351 3665 | Hornsby Office: (02) 9477 1519
O'Brien Plumbing & Roofing provides emergency plumbing, blocked drain clearing, hot water system supply and installation, roof repairs and restorations, leak detection, gas fitting, general plumbing maintenance, gutter and downpipe repairs, commercial maintenance, and strata property maintenance.
Yes. We service residential homes, commercial buildings, strata properties, schools, aged care facilities, hospitality venues, and government buildings across the Central Coast and Northern Sydney.
Yes. All O'Brien technicians are fully licensed under NSW Fair Trading (Licence 311087C), hold current Working with Children Checks where required, and carry individual trade qualifications for plumbing, gasfitting, and roofing.