Greenhill Road Upgrades: Watch for Disturbed Service Lines
City of Unley · Council intelligence · Last updated April 2026
“Administration work with staff from the City of Adelaide and the City of Burnside to investigate the provision of improved walking and cycling infrastructure along the southern boundary of the Adelaide Park Lands fronting Greenhill Road from Anzac Highway to Fullarton Road.”
Full Council, City of Unley, 23 March 2026
Greenhill Road runs right along Kings Park's northern edge — this investigation covers that exact stretch. When they start digging for shared paths and kerb upgrades, older drainage connections and water mains nearby tend to get disturbed. If you're on a block that drains toward Greenhill Road, keep an eye out for slow drains or a drop in water pressure once the shovels go in.
“NOTICE OF MOTION FROM COUNCILLOR M BRONIECKI RE: WALKING AND CYCLING INFRASTRUCTURE ON GREENHILL ROAD”
Full Council, City of Unley, 23 March 2026
This motion kicked off the whole Greenhill Road investigation. It's still early days — no shovel in the ground yet — but these things move from motion to construction faster than most people expect. Worth being aware of if you're planning any drainage work or sewer connections on the northern side of Kings Park.
“The total cost to Council of maintaining the playing surface at Unley Oval for football and cricket differs from year to year as there are various factors that can impact cost. For the 2024-25 financial year, the total cost to Council was $85,172 (excluding GST). This comprises a cost of $28,372 for football (excluding temporary fencing for Sturt Football Club matchdays) and $56,800 for cricket.”
Full Council, City of Unley, 23 March 2026
Not directly a plumbing issue for Kings Park residents, but it tells you something about where council money is going. Oval irrigation and surface drainage at facilities like this are ongoing jobs — and it means council maintenance crews and contractors are regularly active in the Unley area.
Kings Park sits tight against Greenhill Road, and the City of Unley is currently looking at ripping up that corridor for walking and cycling upgrades. That means road works, ground disturbance, and older service lines in the area could cop some stress. If your property backs onto or feeds off infrastructure near Greenhill Road, it's worth knowing what's moving — because council digs have a habit of shaking loose things that were already on the way out.
Kings Park's clay soil is the big story — it's not a problem until tree roots find the sewer line, then it becomes everyone's problem at once. The safest move if you're in one of the original estates is to get your line camera'd before you sell or before the council Greenhill Road works start shaking the ground. You don't need a burst to cost you ten grand; a cracked clay pipe discovered during an inspection will tank your sale price just the same. The other thing locals don't always clock: if you're on one of the flatter allotments, your stormwater design is fighting gravity. After heavy rain, water pools because there's nowhere for it to go. That's not a plumbing fault necessarily, but it's a plumbing conversation — whether you need a sump, better subsoil drainage, or just acceptance that your yard will be swampy for 48 hours after a downpour. Kings Park sits in a zone where council infrastructure upgrades are coming, so it's a good time to get ahead of it.
- Blocked clay sewer lines from tree roots — Kings Park has mature street trees (especially towards the reserve) and clay soil is root-magnet country; you'll know it's happening when the toilet backs up or the shower won't drain
- Hot water unit failures in original brick homes — a lot of units here are 15+ years old and showing it; storage heaters don't last forever and they rarely go quietly
- Stormwater pooling on flat allotments near Kings Park Reserve — the older properties have minimal fall and no subsoil drainage; after the April rains you'd have seen water sitting for days
- Worn-out tap washers and toilet internals in unfitted original homes — some of these places haven't had a plumber touch the internals since 1975; every tap drips and every toilet constantly runs
- Leaking underground stormwater pipes near Greenhill Road properties — the original pipes are getting brittle and the upcoming council works on Greenhill Road could vibrate them loose
- Burst or weeping clay pipes during ground disturbance — if council digs near your property line during the Greenhill Road upgrades, the vibration can crack pipes that were already stressed
- Slow drainage in properties with original 1950s-70s pipework — undersized and corroded lines are common; clearing one blockage doesn't fix the root cause
- Sewer inspection before property sale — tight-hold suburb with older housing stock means pre-sale CCTV checks are becoming standard practice
- Pressure issues in older homes with mineral buildup in galvanised lines — some original homes never had the lines replaced; restricted flow is the symptom
- Subsoil drainage failures on properties backing towards lower ground — Kings Park has subtle slope issues that older drainage designs can't handle