New build plumbing, Central Coast New Builds & Fitouts
Licensed plumber & gas fitter · the Central Coast & Lake Macquarie
New-build, extension and renovation rough-ins, plus commercial kitchens, grease traps and ongoing maintenance for strata, real-estate and property managers. We plan the runs, set the points and fit off cleanly, then certify the work so it passes inspection and settlement.
Request a callback
Get a callback from Josh
Leave a name and number and Josh calls you back, usually the same day. Can't wait? Call 0431 549 178.
What's included
- New-build & extension rough-ins
- Commercial kitchens & grease traps
- Large-scale fit-outs
- Strata & property maintenance
- Light-commercial fit-outs
- Certified to AS/NZS 3500
What's not included
- Design and drafting, we plumb to the drawings you already have
- Fixture and appliance supply unless it is written into the quote
- The certifier sign-off on the overall build, that stays with your certifier

Licensed & insured
Every job is carried out by Josh, a licensed plumber and gas fitter (NSW licence 498220C; Donza Plumbing Pty Ltd, ABN 51 697 209 153), and certified to AS/NZS 3500 plumbing & AS/NZS 5601 gas.
Servicing
On the tools





Try this first
When it is a job for us.
Worth a go yourself
- Get the plumber involved before linings go on, rough-in stage
- Lock in fixture positions before the slab or frame stage where you can
Call us when
- A new build, extension or granny flat needs rough-in and fit-off
- A commercial kitchen, grease trap or trade-waste requirement
- Strata or property maintenance that needs a licensed contractor on file
- A renovation where the plumbing has to work in with other trades
What it costs
New work is quoted to the plans as a fixed price by stage, rough-in and fit-off, so there are no padded hours on site. Send the drawings through and we will come back with a number.
Recent work
Recent work covers the range: stack drainage, drains and rough-in for a double-storey extension and renovation at Summerland Point, a laundry and powder-room rough-in on a larger renovation at Woongarrah, and a three-room renovation at Bateau Bay where the old external sewer stack was renewed to 100 mm PVC and redesigned for the new rooms. At Millfield, about 70 m of new stormwater connects 8 downpipes, with surface inlet points and clear-outs for cleaning. On a rural property at Jilliby, a floor waste set in a shed slab was later run to a new absorption trench. Before Donza, Josh ran crews on large commercial sites across the Hunter.
How the job runs
What to expect, start to finish.
Quote to the drawings
The plumbing priced against the plans, stage by stage, before anyone is on site.
Rough-in
Drainage, water and gas runs set with the frame open, sequenced with the other trades.
Fit-off
Back once linings and tiling are done for fixtures, tapware and appliances.
Certify
Work certified to AS/NZS 3500, with the paperwork your builder or certifier needs.
Good to know
New Builds & Fitouts FAQs
When does the plumber come in on a new build or extension?
Early, and twice. The rough-in happens once the frame is up and before linings, which is why fixture positions need deciding before then. We come back for fit-off once tiling and joinery are done. The quote is set against the drawings at the start so both stages are priced.
Do you do commercial kitchens and grease traps?
Yes. Trade waste, floor wastes and grease traps are part of the commercial work. A kitchen that sends greasy wastewater to sewer needs trade-waste approval first, from Hunter Water in Lake Macquarie and Newcastle or Central Coast Council on the Coast, and the trap goes in to what that approval sets. If the site has a food-prep requirement, we scope the plumbing against it.
Can you work to a builder's program?
That is how the work already runs. Josh ran crews on large commercial sites across the Hunter before Donza, so hitting a set-out date and sequencing with other trades is normal practice rather than a special request.
Do you take on strata and property maintenance?
Yes. Ongoing maintenance for strata, real-estate and property managers is part of the week. Compliance items like backflow testing and TMV servicing can be put on a schedule so nothing lapses between inspections.
Keep reading
Guides & local pages
Customer feedback
What customers say.
Josh did an incredible job for us, the way he conducts himself is outstanding. Polite, respectful and great workmanship Highly recommend him.
Very happy with the service and the jobs we have had done. Turns up on time pricing is great and time frame to book was good I would recommend
Professional with high attention to detail
Related services
Bathroom Renovation Plumbing
Full renovation plumbing from rough-in to fit-off, in-wall cisterns, freestanding baths, slab core-holes, NDIS bathroom set-outs, working in with your builder and tiler, or bringing ours.
Hot Water Systems
Install, relocate, repair and replace gas, electric, heat-pump and continuous-flow hot water units, with the old unit taken away.
Gas Appliance Installation & Gas Lines
Gas appliance installs and changeovers, new and extended gas lines, cooktops, heaters, bayonets and gas hot water, finished with the compliance certificate to AS/NZS 5601.

