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Construction cost calculator

Questions? Read "", see the FAQ below or ask questions on our Facebook page.

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Step-1. Project size
Small
average
large




Step-2. Type of project
new building
renovation/addition






Step-3. Site condition
excellent
good
difficult




Step-4. Quality of finish
basic
standard
luxury




Step-5. Cost data





internal space inc. circulation
$
x
144.1
$216,150.00
decks, verandahs, patios
$
x
9.0
$8,100.00
garage
$
x
36.0
$43,200.00

kitchen
m2
master bedroom
m2
laundry
m2
ensuite bedroom
m2
dining area
m2
walk-in robe
m2
lounge area
m2
bedroom-2
m2
office/study
m2
bedroom-3
m2
rumpus area/ play area
m2
bedroom-4
m2
main bathroom
m2
other bedrooms
x
m2
second bathroom/ toilet
m2
decks, patios, verandahs
m2
other bathroom / toilets
x
m2
garage
m2
other indoor areas or rooms
x
m2
indoor circulation
hallways, stairs, entry
%

Construction cost estimates. New homes. Renovations.

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Central Coast Builder (NSW)

Central Coast Builder. New homes & renovations.

Aspect Designs, Sydney, NSW

Frequently asked questions (FAQ)

Q. Where can I get construction costs?

  1. For accurate estimates let us get you 3 free quotes
  2. For approximate per-square-metre costs for your local area refer to BMT's
    construction cost table

Q. What is circulation?

A. Circulation refers to hallways, entrances and stairways. Use 10% for a basic no-frills house. Use 20% - 25% if you want your house to feel spacious.

Q. How accurate is your construction cost calculator?

A. Our construction cost calculator is only an initial estimation tool. Only use it before you start drawing up plans. Experienced builders who have used our calculator for initial estimates have told us they can get to within 10% of the final cost. So it is important to do your research - the better your research the more accurate your results. Read our article about Building Cost Estimates for more detailed information. It includes a section explaining how and where to get Costing Data.

Q. How will my non-standard features such as high ceilings affect the cost?

A. Hard to say. The best you can do before detailed house plans are drawn up is increase the per-square-metre rates used by the calculator. The calculator has an option called 'Quality of finish' which allows you to select 'basic', 'standard' or 'luxury'. Selecting standard increases the per-square-metre rate by $300. Selection 'luxury' increases the rate by $600.

iPhone version of calculator

Builders Buddy icon

Builders Buddy is an iPhone construction cost estimator & calculator for new houses, renovations & additions. Builders Buddy gives a preliminary estimate of building costs. It is only suitable for use before any detailed plans are made.

Video: How to keep construction costs down

Six essential tips you need to know. Read the article.

Sponsors

Denary Quantity Surveyors Denary Construction Estimating Services. Denary utilises vast experience in the construction industry to provide detailed estimates using the latest computerised measuring and estimating technologies available. Ph: 02 4962 1505.
Coastal Construction & Building If you are building a new home or renovating on Sydney's North Shore, the Central Coast or the Hunter region, Coastal Construction & Building offer full-contract, project management or labour-only contracts so you can choose which contract option works best for you.
Aspect Design Aspect Designs are a multi-disciplined, award winning, Sydney based business who specialise in architecture, interior design, drafting and landscape design.
A&M Flynn Based on the Central Coast of NSW Andrew Flynn, principal owner of A&M Flynn Building Pty Ltd, is a fully certified Master Builder. Andrew's crew of quality tradesmen specialise in the construction of new homes and the implementation of major renovations. Andrew has been a builder for 20 years. Andrew can be reached at 0414-518-465.
Angela Elliss Design Angela and her team understand that communication is the key to making your new home design or renovation a success. They are with you every step of the way, answering every question. Angela has over 15 years of experience in residential building design combined with an architecture degree from the University of Newcastle, NSW. If you are starting from scratch, renovating, or just need advice on where to start and how the building process works, give Angela a call. For detailed information visit the website.
Gecko Homes Gecko Homes specialise in new homes and renovations. Gecko Homes service the NSW Central Coast, Sydney and Newcastle.
Les Smith Les Smith, Master Builder, has been in business for over 30 years. Les specialises in building custom homes, units and townhouses. To date Les and his team have successfully completed more than 100 construction projects.