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Use the Home Project Budget Calculator
The calculator gives the first number. The worksheet turns that number into a comparison you can revisit.
How much will my home project cost?
Estimate a home project budget with materials, labour, fees, delivery, disposal and contingency before work starts.
Project costs hide in the gaps between quotes
A home project estimate often starts with one obvious number: the quote, the materials basket or the contractor day rate. The final cost can move because of delivery, disposal, tools, protective gear, permit fees, extra fixings, wasted material, repair work found during the job and small items that were not written down.
The calculator keeps the estimate simple on purpose. It separates materials, labour, fees, tools and contingency so you can see whether the total is being driven by the quote itself or by the costs around it.
How to build a better estimate
Start with the best real numbers you have. If you have a contractor quote, enter labour or total quoted work. If you are doing the project yourself, materials and tools may be larger than expected. Add delivery, skip hire, disposal, protective sheets, equipment hire and small supplies as a separate line rather than hiding them in memory.
Why contingency matters
A contingency is not a trick to make the number bigger. It is a way to stop the first estimate pretending everything will go perfectly. Small decorating jobs may need a modest buffer. Projects involving plumbing, electrics, older walls, hidden damage or outdoor work can need a bigger one. The calculator simply shows what that buffer adds.
Make the estimate useful
Use the worksheet to record what is included, what is excluded and which prices still need checking. Then run a second calculator version with a higher contingency or a more expensive material choice. If the project only works in the optimistic version, pause before committing.