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How to Create a Construction Budget for Your House
Residential

How to Create a Construction Budget for Your House

OneEstimateFebruary 1, 202620 min read
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Building a House Budget from Scratch

Building a house is one of the biggest financial decisions most people make. A well-prepared budget is essential to avoid unpleasant surprises and keep the project within financial reach.

Step 1: Define the Scope

Before calculating any numbers, you need to clearly define:

  • Total area (m² of construction)
  • Number of floors
  • Finish quality (economic, mid-range, premium)
  • Special features (pool, garden, garage, etc.)
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    Step 2: Structural Costs

    The structure typically represents 35-45% of total construction cost:

    ActivityTypical Cost Range
    Foundation$80-150 USD/m²
    Structure (columns, beams)$120-200 USD/m²
    Walls$60-100 USD/m²
    Roof$80-150 USD/m²

    Step 3: Finishes

    Finishes can represent 25-40% of total cost, varying greatly by quality:

  • Floors: $15-80 USD/m²
  • Paint: $5-15 USD/m²
  • Bathroom fixtures: $1,500-10,000 USD per bathroom
  • Kitchen: $3,000-25,000 USD
  • Step 4: Installations

  • Electrical: 8-12% of total budget
  • Plumbing: 6-10% of total budget
  • Gas: 2-4% of total budget
  • Step 5: Add Indirect Costs

    Don't forget:

  • Permits and licenses (1-3%)
  • Professional fees (8-15%)
  • Insurance (1-2%)
  • Contingency fund (5-10%)
  • Common Mistakes to Avoid

  • Underestimating finish costs — finishes always cost more than expected
  • Ignoring site preparation — demolition, excavation, soil studies
  • No contingency fund — always add 10% for the unexpected
  • Skipping professional help — a good estimator saves money
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