Building Cost Estimator

TradeBot Building Cost Estimate

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Brick Wall Calculator

Wall Length (metres)

Wall Height (metres)

Wall Type

Single Leaf Cavity Wall

Single leaf = 102mm; Cavity = two 102mm leaves + 50mm insulation

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Enter your wall dimensions and click Calculate

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Concrete Floor Slab Calculator

Length (metres)

Width (metres)

Depth (millimetres)

Typical: 100mm paths, 150mm domestic floor, 200mm+ commercial

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Enter slab dimensions and click Calculate

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Roof Calculator

Roof Length (metres)

Length of the ridge (eave to eave along the ridge)

Building Span (metres)

Total width of the building (wall to wall)

Pitch Angle (degrees)

Typical: 22° shallow, 30° standard, 45° steep

Tile Type

Concrete Interlocking (~10.5/m²) Plain Clay Tiles (~60/m²)

Roof Type

Gable End Hipped

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Enter roof dimensions and click Calculate

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Plasterboard Stud Wall Calculator

Wall Length (metres)

Wall Height (metres)

Assumes double-sided plasterboard (2400×1200mm sheets), 47×100mm studs at 600mm centres

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Enter wall dimensions and click Calculate

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Garden Shed Calculator

Shed Length (metres)

Shed Width (metres)

Wall Height (metres)

Eave height (apex ridge will be higher)

Roof Style

Apex (pitched both sides) Pent (single slope)

Includes: CLS wall framing, OSB cladding, roof deck, floor panel, roofing felt and fixings

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Enter shed dimensions and click Calculate

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Timber Fence Calculator

Fence Run Length (metres)

Fence Height (metres)

Standard: 1.8m (6ft)

Fence Style

Closeboard / Featherboard Panel Fencing (1.83m panels)

Post Spacing (metres)

Typical: 1.8m or 2.4m for closeboard

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Enter fence dimensions and click Calculate

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Patio Calculator

Patio Length (metres)

Patio Width (metres)

Surface Type

Concrete Paving Slabs (450×450mm) Natural Stone Slabs Block Paving (60×100mm)

Sand/Mortar Bed Depth (mm)

Typical: 50mm for slabs, 25–30mm for block paving

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Enter patio dimensions and click Calculate

📦 Scraped Product Database

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Pointing & Mortar Calculator

Area to Point (m²)

Total wall face area requiring pointing

Job Type

Repointing New Build Pointing

Repointing uses less mortar than new build joints

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Enter area and job type, then click Calculate

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Plasterboard Ceiling Calculator

Room Length (metres)

Room Width (metres)

2400×1200mm boards, 10% wastage included

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Enter room dimensions and click Calculate

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AI Building Cost Estimator

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Ask me anything about your building project
I'll calculate materials and give you an estimate using live prices.

How much to build a 6m × 2.4m single brick wall? Cost of a 5m × 4m × 150mm concrete floor slab? Plasterboard a 3m × 2.4m stud wall — what will it cost? Roofing felt for a 50m² roof — how many rolls?

Estimates only — always verify with a qualified surveyor. Prices sourced from macblair.com and powered by TradeBot AI.