Fictional demo. Computed live by the estimating engine from a template's default answers, default labour rates and dated catalogue allowances. It is not a real business, customer or supplier price.
Live demo
Attached garage
17.3 m² internal · £39,218.40 inc. VAT
£39,218.40
Selling price inc. VAT
£32,682.00
Before VAT
17.3 m²
Internal floor area · £1,891/m²
3 wks
370 person-hours of labour
Cost to selling price
Materials£11,346.80Labour (at cost)£11,084.85Provisional allowances£1,735.00Plant hire£545.00Direct cost£24,711.65Overheads — 10% of direct cost£2,471.17Contingency — 5% of direct cost£1,235.58Profit — 15% markup on cost£4,262.76Rounding to nearest £1.00£0.84Net selling price£32,682.00VAT at 20%£6,536.40Total£39,218.40
Pricing coverage
Cost backed by a price100%— of which verified (your prices)0%— of which catalogue allowances (dated 2026-09-24)48.1%— of which provisional allowances7%Lines missing a price0Stale prices0Assumptions that could move the price2
Selling price before VAT divided by internal floor area. A reasonableness check only — it does not replace the line-by-line estimate. Template status: provisional
By work package (at cost)
| Package | Materials | Labour | Allowances | Total |
|---|---|---|---|---|
| Preliminaries & site setup | £90.00 | £480.00 | £0.00 | £570.00 |
| Excavation & foundations | £747.50 | £1,350.75 | £0.00 | £2,098.25 |
| Floors | £988.00 | £1,244.40 | £0.00 | £2,232.40 |
| External walls | £2,817.50 | £2,640.75 | £0.00 | £5,458.25 |
| Roof | £2,927.80 | £3,622.95 | £0.00 | £6,550.75 |
| Windows & external doors | £1,800.00 | £630.00 | £0.00 | £2,430.00 |
| Drainage | £410.00 | £720.00 | £0.00 | £1,130.00 |
| Electrical | £106.00 | £306.00 | £0.00 | £412.00 |
| Scaffold & access | £0.00 | £0.00 | £585.00 | £585.00 |
| Plant hire | £545.00 | £0.00 | £0.00 | £545.00 |
| Waste removal | £1,460.00 | £0.00 | £0.00 | £1,460.00 |
| Deliveries | £0.00 | £0.00 | £250.00 | £250.00 |
| Testing & certification | £0.00 | £90.00 | £0.00 | £90.00 |
| Fees & approvals | £0.00 | £0.00 | £900.00 | £900.00 |
Provisional allowances (3)
Items that need a design, a supplier quotation or your confirmation. Edit the figure, or confirm it, on the review page. Material allowances appear on the customer's quote as provisional sums.
- Material deliveries builder to confirm£250.00Delivery charges depend on the supplier and order size. Confirmed against supplier baskets when prices are verified.
- Scaffolding supplier quotation required£585.00Independent scaffold to 13m of elevation, for the build duration. Scaffold is quoted by the scaffolder; this is an allowance at £45/m.
- Building control fees regulatory£900.00Plan check and inspection fees vary by council and project value. Allowance only; confirm with your local authority or approved inspector.
Assumptions (9)
- Garage floor: 150mm concrete slab, power-floated, uninsulated.
- Foundations: trench fill 600mm wide × 1.0m deep in GEN1 concrete under all new external walls.
- Ground floor: 150mm concrete slab on 150mm compacted hardcore.
- External walls: facing brick outer skin, 100mm full-fill insulated cavity, 100mm block inner skin.
- could move the price Gable roof at 30° on manufacturer-designed trusses, covered in concrete interlocking tile. Truss price is an allowance until the manufacturer quotes.
- could move the price Rainwater to a new soakaway at least 5m from the building; a percolation test may be required by building control.
- The existing consumer unit has spare capacity for the new circuits; if not, a new unit is extra.
- No planning application fee, party wall surveyor or planning drawings are included. Permitted development or existing consent is assumed.
- Work to comply with the building regulations applying in England; design by others where a design is required.
Materials — 49 lines (measured → with waste → purchased)
| Item | Measured | + waste | Buy | Unit price | Cost | Price status |
|---|---|---|---|---|---|---|
| Underground drainage pipe 110mm × 3m drainage · from drainage | 6 m | 6.60 | 3 × length | £14.00 | £42.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Bottle gully 110mm drainage · from drainage | 1 nr | 1 | 1 × each | £22.00 | £22.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Pea gravel 10mm drainage · from drainage | 1 m3 | 1.10 | 3 × bulk bag | £52.00 | £156.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Soakaway crate 1 m³ with membrane drainage · from drainage | 2 nr | 2 | 2 × each | £95.00 | £190.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| LED downlight (fire-rated, dimmable) electrical · from electrics | 2 nr | 2 | 2 × each | £9.00 | £18.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Socket/switch point: faceplate, back box, cable share electrical · from electrics | 4 nr | 4 | 4 × each | £22.00 | £88.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Ready-mix concrete GEN1 (foundations) excavation foundations · from foundations | 5.46 m3 | 5.73 | 23 × m³ (0.25 m³ steps) | £32.50 | £747.50 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Composite external door set external openings · from doors | 1 nr | 1 | 1 × each | £900.00 | £900.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Garage door up-and-over single 2134 × 1981 external openings · from garage-door | 1 nr | 1 | 1 × each | £550.00 | £550.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC double-glazed window (A-rated) per m² — 0.9×0.9m ×1 external openings · from windows | 0.81 m2 | 0.81 | 1 × m² | £350.00 | £350.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Concrete block 100mm 7.3N external walls · from below-dpc, cavity-wall | 395.1 nr | 414.8 | 6 × pack of 72 | £130.00 | £780.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Building sand external walls · from below-dpc, cavity-wall | 1.44 m3 | 1.58 | 4 × bulk bag | £52.00 | £208.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Full-fill cavity insulation 100mm external walls · from cavity-wall | 27.8 m2 | 29.9 | 7 × pack | £30.00 | £210.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Insulated cavity closer 2.4m external walls · from cavity-wall | 14.4 m | 14.4 | 6 × length | £6.00 | £36.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Cement 25kg external walls · from below-dpc, cavity-wall | 13.1 bag | 14.4 | 15 × bag | £6.50 | £97.50 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| DPC 100mm × 30m external walls · from cavity-wall | 26 m | 29.9 | 1 × roll | £9.00 | £9.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Facing brick (standard 65mm) external walls · from cavity-wall | 1668.4 nr | 1751.8 | 4 × pack of 500 | £300.00 | £1,200.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Steel cavity lintel 1200mm external walls · from cavity-wall | 2 nr | 2 | 2 × each | £45.00 | £90.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Steel cavity lintel 3000mm over garage door external walls · from cavity-wall | 1 nr | 1 | 1 × each | £150.00 | £150.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Stainless wall ties 225mm external walls · from cavity-wall | 83.4 nr | 83.4 | 1 × box of 250 | £35.00 | £35.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Weep vent external walls · from cavity-wall | 5 nr | 5 | 5 × each | £0.40 | £2.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Damp-proof membrane 1200 gauge 4m × 25m floors · from slab | 17.3 m2 | 19.9 | 1 × roll | £45.00 | £45.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| MOT Type 1 sub-base 150mm compacted floors · from slab | 3.37 m3 | 3.71 | 8 × bulk bag | £48.00 | £384.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Reinforcement mesh A142 4.8m × 2.4m floors · from slab | 17.3 m2 | 19.9 | 2 × sheet | £32.00 | £64.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Ready-mix concrete GEN3 150mm slab floors · from slab | 2.59 m3 | 2.72 | 11 × m³ (0.25 m³ steps) | £35.00 | £385.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Sand blinding 50mm floors · from slab | 0.86 m3 | 0.95 | 2 × bulk bag | £55.00 | £110.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| 1t dumper hire per day plant · from foundations | 2 day | 2 | 2 × day | £70.00 | £140.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| 1.5t mini digger hire per day plant · from foundations | 2 day | 2 | 2 × day | £95.00 | £190.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Cement mixer hire per week plant · from prelims | 3 wk | 3 | 3 × week | £45.00 | £135.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Plant delivery/collection plant · from foundations | 1 nr | 1 | 1 × each | £80.00 | £80.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Site toilet hire per week preliminaries · from prelims | 3 wk | 3 | 3 × week | £30.00 | £90.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Breathable roofing membrane 50m² roof · from trussed-roof | 31.2 m2 | 35.9 | 1 × roll | £55.00 | £55.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Bracing and binders 47×100 roof · from trussed-roof | 27.1 m | 29.8 | 30 × m | £2.40 | £72.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC downpipe 68mm × 2.5m with clips & shoe roof · from trussed-roof | 2 nr | 2 | 2 × each | £18.00 | £36.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Dry verge system per m roof · from trussed-roof | 9.47 m | 9.47 | 10 × m | £11.00 | £110.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC fascia board 175mm × 5m roof · from trussed-roof | 13.2 m | 14.5 | 3 × length | £32.00 | £96.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Lead/lead-free abutment flashing with cavity tray per m roof · from trussed-roof | 6 m | 6 | 6 × m | £28.00 | £168.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC half-round gutter 112mm × 4m roof · from trussed-roof | 13.2 m | 14.5 | 4 × length | £14.00 | £56.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Gutter bracket roof · from trussed-roof | 13.2 nr | 13.2 | 14 × each | £1.30 | £18.20 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Gutter fittings (outlet, stop ends, unions) per run roof · from trussed-roof | 2 nr | 2 | 2 × set | £25.00 | £50.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Ridge tiles with dry-fix system per m roof · from trussed-roof | 6.60 m | 6.60 | 7 × m | £33.00 | £231.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Roofing batten 25×50 treated (graded) roof · from trussed-roof | 90.6 m | 99.7 | 100 × m | £0.80 | £80.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Roof trusses (gable, 30°) designed and supplied roof · from trussed-roof | 27.1 m2 | 27.1 | 28 × m² plan | £45.00 | £1,260.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC soffit board 300mm × 5m roof · from trussed-roof | 13.2 m | 14.5 | 3 × length | £30.00 | £90.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Tile clips and nails (per m² allowance) roof · from trussed-roof | 31.2 m2 | 31.2 | 32 × m² | £0.90 | £28.80 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Concrete interlocking tile roof · from trussed-roof | 312.5 nr | 328.1 | 329 × each | £1.60 | £526.40 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Wall plate 100×50 treated roof · from trussed-roof | 19 m | 20.9 | 21 × m | £2.40 | £50.40 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Muck-away of excavated spoil (grab lorry) waste · from foundations | 3 nr | 3 | 3 × load | £380.00 | £1,140.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Skips for construction waste waste · from waste | 1 nr | 1 | 1 × each | £320.00 | £320.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
Labour — 22 activities
| Activity | Qty | Crew hrs | Person hrs | Rate basis | Cost |
|---|---|---|---|---|---|
| Excavate trenches and reduced level (machine) Groundworker · 0.60 h/m3 · min 8h · +4h setup | 13.1 m3 | 12 | 24 | 1× groundworker @ £30.00/hr + 1× labourer @ £30.00/hr blended | £720.00 |
| Place and level foundation concrete Groundworker · 0.80 h/m3 · min 4h | 5.46 m3 | 4.37 | 8.74 | 2× groundworker @ £30.00/hr blended | £262.20 |
| Blockwork below DPC Bricklayer · 0.70 h/m2 | 11.7 m2 | 8.19 | 12.29 | 1× bricklayer @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £368.55 |
| Hardcore, blind, DPM, insulation, mesh and pour slab Groundworker · 1.20 h/m2 · min 8h | 17.3 m2 | 20.74 | 41.48 | 2× groundworker @ £30.00/hr blended | £1,244.40 |
| Facing brickwork outer skin Bricklayer · 1.20 h/m2 · min 8h | 27.8 m2 | 33.37 | 50.05 | 1× bricklayer @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £1,501.65 |
| Blockwork inner skin Bricklayer · 0.70 h/m2 · min 8h | 27.8 m2 | 19.46 | 29.19 | 1× bricklayer @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £875.70 |
| Wall ties, cavity insulation and closers Bricklayer · 0.10 h/m2 | 27.8 m2 | 2.78 | 2.78 | 1× bricklayer @ £30.00/hr blended | £83.40 |
| Bed lintels Bricklayer · 1.00 h/nr | 3 nr | 3 | 6 | 1× bricklayer @ £30.00/hr + 1× labourer @ £30.00/hr blended | £180.00 |
| Set out and fix roof trusses with bracing Carpenter / joiner · 0.80 h/m2 · min 8h | 27.1 m2 | 21.65 | 43.3 | 2× carpenter / joiner @ £30.00/hr blended | £1,299.00 |
| Breathable membrane and battens Roofer · 0.25 h/m2 · min 4h | 31.2 m2 | 7.81 | 15.62 | 1× roofer @ £30.00/hr + 1× labourer @ £30.00/hr blended | £468.60 |
| Lay concrete interlocking tiles Roofer · 0.60 h/m2 · min 8h | 31.2 m2 | 18.75 | 37.5 | 1× roofer @ £30.00/hr + 1× labourer @ £30.00/hr blended | £1,125.00 |
| Ridge, hip and verge details Roofer · 0.45 h/m | 16.1 m | 7.23 | 10.85 | 1× roofer @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £325.35 |
| Abutment flashing and cavity tray Roofer · 0.60 h/m | 6 m | 3.6 | 3.6 | 1× roofer @ £30.00/hr blended | £108.00 |
| Fascia, soffit, guttering and downpipes Carpenter / joiner · 0.50 h/m · min 4h | 13.2 m | 6.6 | 9.9 | 1× carpenter / joiner @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £297.00 |
| Fit garage door Carpenter / joiner · 5.00 h/nr | 1 nr | 5 | 10 | 2× carpenter / joiner @ £30.00/hr blended | £300.00 |
| Fit external door set Carpenter / joiner · 3.00 h/nr | 1 nr | 3 | 6 | 2× carpenter / joiner @ £30.00/hr blended | £180.00 |
| Fit windows, seal and make good Carpenter / joiner · 2.50 h/nr | 1 nr | 2.5 | 5 | 2× carpenter / joiner @ £30.00/hr blended | £150.00 |
| Excavate and install soakaway with rainwater run Groundworker · 12.00 h/nr | 1 nr | 12 | 24 | 2× groundworker @ £30.00/hr blended | £720.00 |
| Electrical first fix: cables, back boxes, circuits Electrician · 1.10 h/nr · min 4h | 6 nr | 6.6 | 6.6 | 1× electrician @ £30.00/hr blended | £198.00 |
| Electrical second fix: faceplates, fittings, connection Electrician · 0.60 h/nr · min 3h | 6 nr | 3.6 | 3.6 | 1× electrician @ £30.00/hr blended | £108.00 |
| Test, certify and notify (Part P / equivalent) Electrician · 3.00 h/nr | 1 nr | 3 | 3 | 1× electrician @ £30.00/hr blended | £90.00 |
| Site set-up, protection, welfare and daily clean General builder · 8.00 h/nr | 1 nr | 8 | 16 | 1× general builder @ £30.00/hr + 1× labourer @ £30.00/hr blended | £480.00 |
BuildLegend platform default v1 — provisional, derived from published UK estimating norms; validate against your own site records.
Measured geometry
| Module | Floor m² | New wall m | Net wall m² | Roof slope m² | Eaves m | Foundation m |
|---|---|---|---|---|---|---|
| Single garage | 17.28 | 13.00 | 27.81 | 31.25 | 13.20 | 13.00 |