| Click the button on the right to use the Adobe Flash version of our construction cost calculator or use our original calaculator below. (Just follow the steps indicated.) |
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project type: | new home renovation & additions | ||
| On a per-square-metre basis renovations & additions are usually more expensive than building a new house. This calculator assumes they are twice as expensive, but this is not necessarily the case; we recommend you consult a licensed builder or architect. It is also prudent to explore two cost saving options: (1) knock-down & rebuild, or (2) leave the current building essentially untouched and attach a new building using a walkway or some other mechanism. | ||||
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size of house: | small medium large | ||
| Select from small, medium or large to set defaults for the areas specified in the table of areas below. Then change the default values to values appropriate for your renovation or new home design. All areas must be specified in square-metres. | ||||
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site conditions: | excellent good difficult | ||
| Flat/level blocks are of course the easiest & cheapest blocks to build on and if this is the case with your property select "excellent", unless the block has water drainage or other complications, in which case select "difficult". Steeply sloped properties should also be marked as difficult. Use "good" for slightly sloping properties. Note that if you selected "renovations & additions" whatever you select here will not change the per-square-metre cost; it is assumed this is already factored in by doubling the base rate for renovations & additions. | ||||
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quality of finishes: | basic standard luxury | ||
| Quality of finishes refers to PC items like toilets, tiles, bathtubs, sinks and taps as well as doors, door handles etc. By selecting "basic" you are implying that you will be buying PC items where cost is of higher concern than quality or style. Selecting "standard" implies that quality is as important as cost, but style is less important than either. If you select "luxury" you are implying that style and quality are more important than cost. | ||||
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cost per-square-metre: |
indoor areas $ garage $ decks, verandahs & patios $ |
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| The per-square-metre costs shown above are unlikely to be accurate for your area. To get more accurate values read the section below entitled: "Where to find costing data". | ||||
| kitchen | master bedroom | ||
| laundry | ensuite bathroom | ||
| dining area | walk-in wardrobe | ||
| lounge area | bedroom 2 | ||
| office / study | bedroom 3 | ||
| rumpus room / play area | bedroom 4 | ||
| main bathroom | other bedrooms | x | |
| 2nd bathroom and/or toilet | garage | ||
| other bathrooms and/or toilets | x | decks, verandahs & patios | |
| other indoor areas or rooms | x | indoor circulation | |
| The total calculated indoor area will include a minimum of 10% for "circulation"; i.e., areas such hallways, entrances and stairways. Select 20% or 25% if you want your house to feel spacious. | |||
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indoor area (includes circulation space) outdoor areas garage total area (in square metres) |
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indoor area (includes circulation space) $ outdoor areas $ garage(s) $ total cost |
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Sponsors
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For a complete range of construction materials, suppliers and trades professionals see buildingchoices.com.au. This complete all-in-one website caters for floor coverings, insulation, doors, bricks and more. |
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Aspect Designs are a multi-disciplined, award winning, Sydney based business who specialise in architecture, interior design, drafting and landscape design. |
Where you can find costing data
Cordell Estimating has a range of costing solutions to assist you with estimating.
Quantity Surveyors are frequently utilised to price large and small home building projects including renovations. Renovations often get out of control on price, but if you hire a quantity surveyor you have a better chance of sticking to your budget. Denary Quantity Surveying (02 4962 1505) are based on the east coast of NSW but service clients nationwide, providing construction cost estimates and tax depreciation reports.
Home Estimators are an economical option to costing your new home, renovation or large residential development. Home Estimators are Melbourne based but operate Australia-wide. You can call them on 0438 187 885.
Use a quoting service such as ServiceSeeking.com.au - post a job online and various builders quote on it. To date the value for home-construction quotes on Service Seeking has been between $1100 and $1650. Unfortunatly it is not known whether that was for additions & renovations or new homes.
Contact local home builders that have been recommended to you, a builder you have used before or try one of our sponsors:
- For the Perth and all of Western Australia contact the ABN Group of building companies and request indicative per-square-metre costs of a new home with different levels of finishes.
- For the Central Coast, Newcastle and Sydney areas try Gecko Homes. Bruce Louis at Gecko offers an initial consultation services for large renovations, new homes and house and land packages. Their contact number is 0413 77 99 79.
A final note: quoting on a new house or renovation is a time consuming process so please be considerate and only call in a builder to give you a detailed quotation when you are committed and ready to move forward.
Further reading
You may find it beneficial to browse the following related web pages. These web pages also provide bathroom and kitchen cost information: