Guidelines for Utilizing the Calculator to Compare Against Average Estimates

Ground Floor

1. New Construction: For brand-new ground floor extensions encompassing footings, walls, and roof, include the entire square meter (sqm) area.
2. Renovation: In cases of renovation where existing walls and floors are retained, estimate approximately 65% of the total area.
3. Considerations: Understand that this formula serves as a guideline and may not yield precise results.
4. Additional Spaces: Factor in rooms used for stair access to the second storey, as well as any renovated bathrooms or ensuites.

First Floor New Second Storey Work

1. Comprehensive Inclusion: Include the total square meterage, accounting for stair voids and any additional spaces associated with the new second-storey construction.

External Area

1. Scope: Exclude swimming pools from the calculation. However, include structural components such as retaining walls, tiling, pool coping, screens, and fences.
2. Clarification: Ensure a clear understanding of what constitutes the external area and include all relevant structural elements for comprehensive estimation.

Notes: By adhering to these professional guidelines, users can effectively utilize the calculator to compare their project estimations against average figures, aiding in informed decision-making during the construction process.