The short answer
Yes, McDermott Plumbing covers Girrawheen, Koondoola, Marangaroo and Alexander Heights for licensed plumbing and gas: blocked drains and sewers, burst pipes and leaks, hot water repairs and replacements, leak detection and gas fitting, for owners, tenants, landlords and property managers. Call (08) 6187 3999 or text 0406 882 648. It’s a run west from our Ellenbrook base, and we’ll give you a real ETA when you ring.
Girrawheen and Koondoola: the 1970s core
The Shire gazetted the name Girrawheen, meaning “place of flowers”, in June 1970. The schools show how quickly it filled: Blackmore Primary opened in 1971, Hainsworth Primary in 1972, Girrawheen Senior High in 1974 and Girrawheen Primary in 1975. Koondoola, next door, was mostly built in the 1970s too. Koondoola Primary opened in 1975 and Koondoola Plaza in 1978, and before that a large part of the suburb had been a regional landfill site. Its bushland reserve has had major fires as recently as 2012 and 2021.
So the oldest houses here are now around fifty years old. Unless the pipework has been replaced, that means sewer lines, copper supply pipe and hot water positions that date from when the house was built.
Marangaroo and Alexander Heights
Marangaroo, between Wanneroo Road, Hepburn Avenue, Mirrabooka Avenue and Marangaroo Drive, came later. Marangaroo Primary opened in 1987 and Rawlinson Primary in 2003, with the golf course in between. Alexander Heights was first named Alinjarra in 1977 and renamed in 1987 after Alexander Drive, its eastern boundary. Houses here are generally younger than Girrawheen’s, but even the newest streets are now past the 15-year mark Water Corporation uses when it warns about roots in sewers.
What we see around Girrawheen and Marangaroo
- 1970s sewer lines under established trees. Water Corporation says homes over 15 years old are less likely to have PVC sewer pipe and more at risk from roots, and the Girrawheen and Koondoola houses are well past that. Slow drains, a gurgling toilet and an overflow relief gully that fills up are the early signs.
- Original copper supply pipe: pinhole leaks, a water meter that keeps ticking with everything turned off, and water bills that jump for no clear reason.
- Hot water units squeezed into a laundry or onto a side wall, now on their second or third replacement in the older streets.
- Bathrooms and laundries that have been patched over the years, with old and new pipework joined behind the wall. We check what’s actually there before quoting a fix.
- Rental properties, where the tenant reports the fault and the landlord or agent authorises the work. Tell us who’s who when you book so the invoice goes to the right person.
Renting? How urgent repairs work in WA
Consumer Protection WA says a landlord has 24 hours to organise repairs to essential services, which include the water supply, the hot water system and sewerage. For other urgent repairs, the landlord has 48 hours to organise a suitable repairer. Tenants should tell the landlord or agent as soon as possible, in writing if they can, and keep copies of everything.
If you’re a tenant with sewage overflowing, call Water Corporation on 13 13 75 as well as your landlord or agent. If you’re a landlord or property manager, you can book us directly and we’ll arrange access with the tenant.
Jobs we do around Girrawheen and Marangaroo
- Blocked drains, sewers, toilets and gullies
- 24/7 burst pipe and leak call-outs
- Hot water repairs and replacements (gas, electric and continuous flow)
- Leak detection and high water bill checks
- Gas fitting and gas leak checks
- Rental maintenance for landlords and property managers
Common questions
- Which suburbs does this page cover?
- Girrawheen, Koondoola, Marangaroo and Alexander Heights. Landsdale, Darch and Madeley have their own page, and so do Mirrabooka and Dianella, Duncraig, and Wanneroo. If you’re not sure, call (08) 6187 3999 with the street.
- I’m renting in Girrawheen and the toilet is blocked. Who do I call?
- Tell your landlord or agent first, in writing if you can. Consumer Protection WA says landlords have 24 hours to organise repairs to essential services like sewerage. If sewage is overflowing, also ring Water Corporation on 13 13 75. Your landlord or agent can book us, and we’ll describe what caused the blockage on the invoice.
- Our 1970s Koondoola house keeps getting blocked drains. Why?
- In homes this age, roots getting into older sewer pipe are a common cause, especially near big trees. We clear the blockage and tell you where it was and what caused it, so you can decide whether a repair to that section is worth doing. Our tree roots page explains more.
- Is Girrawheen far from your base?
- It’s a run west from Ellenbrook, not around the corner and not right across Perth. The ETA depends on where we are when you ring, and we’ll give you a real time.
- Can you find a leak in old copper pipe?
- Yes. Start with the meter test on our leak detection page. If the meter moves with everything off, we track down where the water is going and repair or replace the section of pipe.
Nearby
Northern suburbs next to this one.
The jobs we get called for most here.
Related pages
Official sources
Last updated 8 October 2026. General information only. Every property is different, so call us to talk about yours.