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a) Calculate the basic house value
Type Rate ($/m²)
Standard home $1,800
Quality home $2,300
Luxury home $3,800
b) Add garages, carports
Single carport (15m²) $6,000
Double carport (35m²) $13,300
Single garage (15m²) $12,600
Double garage (35m²) $28,000
c) Add timber verandas and decks
Approximate area (m²) at $160 per m² deck only
Approximate area (m2) at $ 140 per m2 verandah roof
d) Home extension
Standard home
Typical brick veneer or timber extension.
Under 30m² $1,800 - $2,700/sq.m
Over 30m² $1,200 - $1,800/sq.m
Quality Home
Timber or brick veneer extension with design feature walls, bay windows.
Under 30m² $2,400 - $3,500/sq.m
Over 30m² $1,600 - $2,420/sq.m
Luxury Home
Timber or brick veneer extension with high ceilings, quality wall and fl oor finishes.
Under 20m² $3,620 - $4,300/sq.m
Over 20m² $2,600- $3,900/sq.m
Kitchen
Standard kitchen $10,320 - $14,200
Quality kitchen $16,300 - $25,600
Luxury kitchen $23,500 - $36,600
Bathroom
Standard bathroom $10,100 - $16,400
Quality bathroom $15,200 - $23,100
Luxury bathroom $23,000 - $36,200
Ensuite
Standard ensuite $ 6,100 - $ 9,400
Quality ensuite $10,800 - $15,300
Luxury ensuite $16,200 - $24,500
Laundry
Standard - luxury $ 4,300 - $16,300
Powder Room
Standard - luxury $4,700 - $15,500
GST, Professional Fees
You will need to add 10% GST to your estimate. You may be able to claim some of this back depending on your personal taxation structure and the nature of your renovation. Your accountant or taxation consultant can advise you of this.
You will also need to make an allowance for architects, structural engineers and possibly other design consultants fees and for building and possibly development approval fees. These would typically be a total of 10% to 12% up to the stage of completed working drawings.
Total Cost Structure
The approximate cost structure of new homes and renovations is as follows:
Materials 40%
Labour 30%
GST, taxes, fees, permits 20%
Builders pro fi t margin 10%
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