Local context — Murwillumbah
The Tweed Valley's volcanic soils are some of the most fertile in Australia — and they're heavy. Basalt-derived clays hold water, which lengthens absorption trenches but doesn't change the tank you install. Most Murwillumbah-area properties have generous block sizes, so septic siting is rarely constrained. Tweed Shire processes the approval; your licensed plumber lodges the on-site sewage management paperwork as part of the install.
Delivery to Murwillumbah
We deliver poly septic tanks across the Northern Rivers from our depot, typically 3–10 working days after order. Pickup is available where practical and is the cheapest option.
Council and approvals
Septic approvals in Murwillumbah are processed by Tweed Shire Council under the NSW on-site sewage management framework. Your licensed plumber lodges the paperwork as part of the install — see our council approval guide for the full process.
Frequently asked questions — Murwillumbah
Do you deliver septic tanks to Murwillumbah?
Yes. We deliver 1500L and 2500L polyethylene septic tanks to Murwillumbah and across Northern Rivers NSW. Lead time is typically 3–10 working days from order. Pickup from our depot is also available and is the cheapest option where it's practical for you.
What size septic tank do I need in Murwillumbah?
For most Murwillumbah-area households, a 1500L tank covers a 2–4 person home. Larger households (4+ permanent occupants), farmhouses or homes with a second dwelling typically step up to a 2500L three-chamber tank. Where there's a separate granny flat or workers' cottage, a dedicated 1500L tank for that dwelling is usually simpler than oversizing one shared tank.
Which council handles septic approvals in Murwillumbah?
Tweed Shire Council processes on-site sewage management approvals for Murwillumbah. Your licensed plumber lodges the Notice of Work before install and the Notice of Completion afterwards — that paperwork is part of every legitimate septic install, regardless of which tank brand you buy.
How much does septic installation cost in Murwillumbah?
All-in install in the Northern Rivers NSW region typically runs $5,500–$9,500 for a 1500L poly system (tank, sand bedding, excavation, plumber connections, absorption trench, council fees). Concrete equivalents typically add $2,000–$4,000 on top, mostly in freight and crane costs. See our full cost breakdown for a line-by-line picture.
Does Mount Warning's clay soil need a special septic tank?
No — the tank stays standard. What changes is the absorption trench sizing. Heavy basalt clays percolate slowly, so your licensed plumber lengthens the trench based on a percolation test. The 1500L or 2500L poly tank itself is identical to what you'd install on sandy coastal country.