Fairfield City · postcode 2176
Home Extensions in St Johns Park: Adding a Master Suite
Three bedrooms, one bathroom, and a queue every morning at 7.
That's the 1970s floor plan most St Johns Park families inherit. The fix that changes daily life the most usually isn't a bigger living room. It's a proper main suite behind the living areas, with its own bathroom and somewhere to put your clothes.
Short answer
What does it cost to add a master suite in St Johns Park?
For a bedroom, ensuite and walk-in robe of about 35m², allow roughly $64,000 to $69,000 for the shell on Rawlinsons' Sydney brick veneer rates, plus $23,500 to $26,500 for the ensuite fit-out. Small additions cost more per m² than big ones, so treat that as a floor. Plenty of single-storey suites here fit complying development; otherwise Fairfield assesses DAs in 8 to 12 weeks.
Written and reviewed by Oliver Alameri
Licensed builder, NSW Contractor Licence 487805C · Founder, Buildana
Fact-checked
Where the suite goes
Usually the rear corner, off the existing hallway, as far from the living areas and the street as the lot allows. Quiet. Private. Close enough to the kids' rooms to hear a cough at 2am.
The old main bedroom then becomes a fourth bedroom or a study. One addition, two problems solved.
A good suite has three zones in a row. The bedroom by the window, the robe as a buffer, the ensuite at the back where plumbing is easiest. Walk-in robes around two metres by two work well; the ensuite needs roughly five square metres to feel comfortable with a separate shower and toilet.
- Bedroom on the garden side for light and quiet
- Walk-in robe between bed and bathroom
- Ensuite placed where it can reach the sewer line
- Old main bedroom freed up as a fourth bedroom
The best addition in a busy house is the second bathroom. Everything else is a bonus.
Getting water in and out
The ensuite drives the layout more than the bedroom does. Waste has to fall to the sewer, so we locate the house drain and the Sydney Water connection before drawing anything. If a sewer main crosses the backyard, building over or beside it needs Sydney Water's sign-off.
Waterproofing follows the Australian Standard for wet areas, with the membrane inspected before tiling. An exhaust fan ducted outside, not into the roof, keeps the new room from growing mould behind the robe.
Hot water is the sleeper issue. A 1970s system at the far end of the house can take a long time to reach a new ensuite. Sometimes a second small heat pump unit makes more sense than a longer pipe.
Ready to end the bathroom queue?
Sketch the current floor plan on paper, snap it, and send it with your address. I'll suggest where a main suite would sit and what it's likely to cost.
0476 300 300Joining a 1970s brick house
Most homes here are brick veneer or double brick on M to H class clay, and the new footings get engineered to the soil report rather than copied from 1978 drawings, with a control joint at the junction so old and new can move independently through wet winters and dry summers.
Then the roof. Matching the existing pitch and tiles usually looks best on a single-storey suite. Old tiles unobtainable? A skillion set below the gutter line can look intentional rather than patched.
Cost and approval
Rawlinsons' Sydney schedule prices single-storey brick veneer additions in the 50 to 75 square metre band at $1,825 to $1,965 per square metre. So a 35 square metre suite lands around $64,000 to $69,000 for the room itself, and Fairfield's slightly lower cost index trims that a little. Add the ensuite fit-out: $23,500 to $26,500.
Single-storey additions that meet the state codes qualify for a CDC. The rest go to Fairfield City Council, typically 8 to 12 weeks. Any work worth $50,000 or more also triggers BASIX.
Before the suite is drawn
Questions I'd answer on any St Johns Park main-suite addition.
- 01
Where does the house drain run, and is there a sewer main in the yard?
- 02
Which corner of the lot is quietest and most private?
- 03
Will the old main bedroom become a bedroom or a study?
- 04
Can the existing hot water system reach the ensuite quickly?
- 05
What does the soil report say about footings?
- 06
Can the new roof match the old tiles and pitch?
Adding a main suite in St Johns Park
How big should a master suite addition be?
Around 30 to 40 square metres covers a generous bedroom, walk-in wardrobe and ensuite with a separate toilet.
Can I add an ensuite without extending?
Sometimes, by taking space from a large bedroom or linen cupboard. It depends on where the plumbing can run.
Do I need Sydney Water approval for an addition?
If you build over or close to a Sydney Water pipe, yes. Checking the sewer location early avoids redesigns.
Does a master suite add value in St Johns Park?
A second bathroom and a fourth bedroom are two of the most valued upgrades in this part of Fairfield, and a suite delivers both.
Sources and references
Costs are from the Rawlinsons handbook with the local cost index applied; rules and timeframes are checked against the sources below.
A room that's actually yours.
A St Johns Park main suite, planned around the plumbing and priced before you commit.