EstiFlow
Preliminary Cost Estimate
Sample Duplex Project NSW			Attached dual-occupancy duplex — 2 × 4-bedroom dwellings
Sample Project NSW			28 April 2026
Total Contract Value (inc GST)
Priced area (m²)	279.07
FSR-regulated GFA (m²)	245		Council / DA reporting area basis
Total Items	Total Trades	RFI Count	0.0%	0.0%
	26	12
CHART DATA (Top 8 trades + Other — charts above update automatically)
Specialty / Joinery / Fitout		215,300	17.9%
Site Management		150,090	12.5%
Preliminaries		120,463	10.0%
Framing & Roof Carpentry		98,400	8.2%
Masonry & Brickwork		56,710	4.7%
Plumbing & Hydraulics		56,040	4.7%
Drainage & Stormwater		47,365	3.9%
Electrical		46,725	3.9%
Other (18 trades)		411,235.2	34.2%
TOTAL		1,202,328.2
TOTAL
COST SUMMARY
Net Construction Total (ex GST, ex margin)
Builder Margin
Contract Subtotal (ex GST)
GST (10%) on Contract Subtotal
Total Contract Value (inc GST)
Lockup Estimate
Fitout Balance to Completion
Rate Source: Published industry cost data (current edition)
TRADE COST BREAKDOWN
Specialty / Joinery / Fitout		11	215,300	17.9%
Site Management		5	150,090	12.5%
Preliminaries		16	120,463	10.0%
Framing & Roof Carpentry		7	98,400	8.2%
Masonry & Brickwork		7	56,710	4.7%
Plumbing & Hydraulics		14	56,040	4.7%
Drainage & Stormwater		5	47,365	3.9%
Electrical		12	46,725	3.9%
Doors & Door Hardware		7	45,740	3.8%
Glazing & Windows		10	45,240	3.8%
Mechanical Services / HVAC		3	41,200	3.4%
Internal Linings & Plaster		3	38,598	3.2%
Slab & Substructure		5	32,562.6	2.7%
External Works & Landscape		2	31,950	2.7%
Demolition & Asbestos		8	29,812.6	2.5%
Render to Masonry		2	21,450	1.8%
Roofing & Sheet Metal		5	19,002	1.6%
Painting		4	18,855	1.6%
Paving & Driveway		2	17,400	1.4%
Site Fencing		1	16,000	1.3%
Insulation		3	12,690	1.1%
Floor Finishes (timber/carpet)		2	11,670	1.0%
Waterproofing		3	8,750	0.7%
Termite Management		1	8,000	0.7%
Wet-area Tiling		2	7,045	0.6%
Excavation & Cut-to-level		2	5,270	0.4%
Site Preparation & Earthworks		2
TOTAL				100.0%
ESTIMATE DETAILS
Job Reference
Dwelling Count		2
Project Type		Attached dual-occupancy duplex — 2 × 4-bedroom dwellings
Project Type		Attached dual-occupancy duplex — 2 × 4-bedroom dwellings
Estimate Date		28 April 2026
Estimate Type		Combined Rates (Supply + Install)
Revision ID		N/A
MEASUREMENT TIERS
Documented (Scheduled/Stated)			Values taken from printed schedules and specifications
Derived (Measured/Computed)			Quantities computed from scaled drawings and geometry
Estimated (Indicative)			Estimated quantities requiring verification
Provisional			Provisional sums and allowances
HOW TO USE THIS WORKBOOK
1. Start with this Summary sheet to review the total contract value and trade breakdown.
2. ALL dollar values on this sheet are live formulas linked to the "Bill of Quantities" sheet.
3. Open "Bill of Quantities" and edit any Rate or Quantity -- all totals on this Summary and the Trade Summary sheet will update automatically via Excel formulas.
4. Use "Program Dashboard" for the visual program overview: milestones, phase timing, critical path and procurement releases.
5. Use "Schedule Inputs" to set a project start date, edit trade lead times, and apply builder overrides.
6. Review "Indicative Program" for the dependency-aware baseline schedule and override durations where required.
7. Check "Procurement Schedule" for long-lead release dates and on-site requirements.
8. "Program Gantt" shows the printable colour-coded program with procurement, milestones, and critical path highlighting.
9. Check "Provisional Sums" for items that are allowance-based and will be subject to final measurement.
10. The "RFI Register" lists all items requiring further information or verification. Use the Status dropdown to track responses (OPEN / IN PROGRESS / CLOSED / N/A).
11. "Trade Exclusions" and "Scope Assumptions" document what is and is not included in this estimate.
12. All data sheets have filters enabled -- use the dropdown arrows in the header row to filter by trade, status, or any column.
13. Charts above are native Excel charts linked to the "Chart Data" table. When you edit rates or quantities in BOQ, the charts update automatically.
Generated by EstiFlow \| 28 April 2026 \| Confidential