Updated October 2026
Dee Why is one of the most apartment-heavy suburbs on the Northern Beaches, so a hot water problem here very often starts with a question about strata. Beaches Hot Water is a free referral service that connects you with licensed hot water plumbers who cover Dee Why. We do not do the plumbing ourselves, and there is no charge for the referral.
Units, cupboards and balconies
Dee Why's unit stock ranges from older walk-up blocks to newer strata buildings. In the walk-ups, many units still run a small electric storage tank in a laundry or kitchen cupboard. Newer blocks often use balcony-mounted continuous flow units or a centralised building system that serves every apartment.
Before you book anything, work out who owns the system:
- Inside your lot and serving only your unit: usually your responsibility.
- Centralised plant or common property: usually the owners corporation.
- Changing system type or location: often needs strata approval first.
Cupboard installs also limit your options. A like-for-like swap into the same footprint is usually the practical choice, because there is little room for anything bigger. The licensed plumbers we work with can look at the setup and tell you which side of the line it falls on before quoting.
Houses near the beachfront
Not every Dee Why job is a unit. The houses closer to the beach deal with salt air, which is hard on external tanks, valves and heat pump fins. Checking the sacrificial anode around year five helps a storage tank reach the typical 8 to 12 year lifespan.
What it costs
As a guide, repairs roughly cost $150 to $600 depending on the part. Electric storage swaps run from around $800 to $2,500 installed. Continuous flow and gas storage run around $1,200 to $3,500 installed. Heat pumps cost around $3,000 to $6,000 installed before incentives, which can cut thousands off, with the installer quoting the net figure. Unit jobs can add small costs for access or compliance parts. Mains gas availability varies street by street, so the plumber confirms what your building has. The plumber's quote is the price that counts. See the cost guide for more.
For standard cupboard tanks, same-day replacement is often possible when you get the request in early in the day.
Frequently asked questions
My unit's hot water is in a tiny cupboard. Can it be replaced?
Usually, yes. Slimline and compact tanks are made for tight spaces. The plumber matches the size to the cupboard and your household.
Do I need strata approval to replace my hot water system?
For a like-for-like swap inside your lot, often not. If the job touches common property or changes the system type, strata approval is usually needed. Check your by-laws or ask the strata manager.
The whole building has no hot water. Who do I call?
That points to centralised plant, which is generally a strata matter. Let your strata manager know first.
Nearby, we also cover Narraweena and Collaroy.