Granville facts that matter
Split down the middle
Of 6,817 homes in the ABS suburb at the 2021 Census, 4,004 (58.7%) were in Cumberland and 2,813 (41.3%) in the City of Parramatta.
Units and renters
55.4% of occupied homes were flats or apartments and 34.8% separate houses. 54.6% were rented, against 32.6% across NSW.
Cumberland's flood study
Cumberland's updated draft flood study for A'Becketts Creek, Duck Creek and Duck River names Granville and Granville South. Feedback closed on 14 September 2026.
Parramatta's flood study
Parramatta's draft A'Becketts Creek mapping covers parts of Granville, Harris Park and Rosehill, where around 1,500 properties were found to have a flood risk in a 1% AEP event.
What overland flooding means for your drains
Cumberland City Council describes local overland flooding as stormwater flowing over the ground, through the low spots, once the drainage system reaches capacity. No pipe on a single block can stop that. What you control is your own share: gutters, downpipes and pits kept clear so roof water drains away rather than adding to the flow.
If water pools at your place after storms, check both councils' draft maps for your street before you pay for bigger drainage. Our stormwater page explains what a plumber can and can't fix.
Units and shared pipes
With most Granville homes rented or in blocks, Sydney Water's shared pipe rule matters: each owner sharing a joint private service is responsible for it. Tenants should go to the landlord or agent first, and strata owners to the strata manager.
Water pipes from Sydney Water's system to the taps are the owner's too, and Sydney Water maintains the meter. For a blocked sewer see blocked drains in Sydney. We'll match it with a licence-checked drain specialist who covers Granville.
What we would do
If storms keep flooding your yard, find out first whether it's your stormwater line or overland flow from the catchment. A plumber can camera and clear your own line. If the line is fine, the water is coming over the ground, and the useful next step is the council flood map and a talk with Council, not a bigger pipe.