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
Carport
16.7 m² internal · £21,894.00 inc. VAT
£21,894.00
Selling price inc. VAT
£18,245.00
Before VAT
16.7 m²
Internal floor area · £1,089/m²
2 wks
199 person-hours of labour
Cost to selling price
Materials£4,901.10Labour (at cost)£5,969.55Provisional allowances£2,590.00Plant hire£335.00Direct cost£13,795.65Overheads — 10% of direct cost£1,379.57Contingency — 5% of direct cost£689.78Profit — 15% markup on cost£2,379.75Rounding to nearest £1.00£0.25Net selling price£18,245.00VAT at 20%£3,649.00Total£21,894.00
Pricing coverage
Cost backed by a price100%— of which verified (your prices)0%— of which catalogue allowances (dated 2026-09-24)38%— of which provisional allowances18.8%Lines missing a price0Stale prices0Assumptions that could move the price0
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 | £60.00 | £480.00 | £0.00 | £540.00 |
| Excavation & foundations | £195.00 | £1,096.80 | £0.00 | £1,291.80 |
| Floors | £988.00 | £1,205.40 | £0.00 | £2,193.40 |
| Structural elements | £0.00 | £0.00 | £1,440.00 | £1,440.00 |
| External walls | £607.00 | £675.45 | £0.00 | £1,282.45 |
| Roof | £1,640.10 | £2,211.90 | £0.00 | £3,852.00 |
| Electrical | £31.00 | £210.00 | £0.00 | £241.00 |
| Scaffold & access | £300.00 | £0.00 | £0.00 | £300.00 |
| Plant hire | £335.00 | £0.00 | £0.00 | £335.00 |
| Waste removal | £1,080.00 | £0.00 | £0.00 | £1,080.00 |
| 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.
- Posts, beams and pad foundations (8 posts) builder to confirm£1,440.00Treated timber or steel posts on concrete pads with a beam carrying the open sides of the roof.
- Material deliveries builder to confirm£250.00Delivery charges depend on the supplier and order size. Confirmed against supplier baskets when prices are verified.
- 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)
- Open on the front and left; walls priced on the other sides as single-skin blockwork.
- A carport open on at least two sides and under 30 m² is normally exempt from building regulations; check the planning position.
- Foundations: strip 600mm wide × 0.6m deep in GEN1 concrete under all new external walls.
- Ground floor: 150mm concrete slab on 150mm compacted hardcore.
- External walls: single-skin 100mm masonry with piers at 3m centres (unheated, unlined).
- Flat roof: 47×195 C24 joists at 400 centres with firrings to fall, epdm rubber roof membrane with adhesives & trims.
- 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 — 32 lines (measured → with waste → purchased)
| Item | Measured | + waste | Buy | Unit price | Cost | Price status |
|---|---|---|---|---|---|---|
| Alloy tower scaffold hire per week access equipment · from access | 2 wk | 2 | 2 × week | £150.00 | £300.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| LED downlight (fire-rated, dimmable) electrical · from electrics | 1 nr | 1 | 1 × each | £9.00 | £9.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Socket/switch point: faceplate, back box, cable share electrical · from electrics | 1 nr | 1 | 1 × each | £22.00 | £22.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Ready-mix concrete GEN1 (foundations) excavation foundations · from foundations | 1.30 m3 | 1.37 | 6 × m³ (0.25 m³ steps) | £32.50 | £195.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Concrete block 100mm 7.3N external walls · from below-dpc, single-skin | 263.6 nr | 276.8 | 4 × pack of 72 | £130.00 | £520.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Building sand external walls · from below-dpc, single-skin | 0.35 m3 | 0.38 | 1 × bulk bag | £52.00 | £52.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Cement 25kg external walls · from below-dpc, single-skin | 3.16 bag | 3.48 | 4 × bag | £6.50 | £26.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| DPC 100mm × 30m external walls · from single-skin | 8.70 m | 10.0 | 1 × roll | £9.00 | £9.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Damp-proof membrane 1200 gauge 4m × 25m floors · from slab | 16.7 m2 | 19.3 | 1 × roll | £45.00 | £45.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| MOT Type 1 sub-base 150mm compacted floors · from slab | 3.26 m3 | 3.59 | 8 × bulk bag | £48.00 | £384.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Reinforcement mesh A142 4.8m × 2.4m floors · from slab | 16.7 m2 | 19.3 | 2 × sheet | £32.00 | £64.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Ready-mix concrete GEN3 150mm slab floors · from slab | 2.51 m3 | 2.64 | 11 × m³ (0.25 m³ steps) | £35.00 | £385.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Sand blinding 50mm floors · from slab | 0.84 m3 | 0.92 | 2 × bulk bag | £55.00 | £110.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| 1t dumper hire per day plant · from foundations | 1 day | 1 | 1 × day | £70.00 | £70.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| 1.5t mini digger hire per day plant · from foundations | 1 day | 1 | 1 × day | £95.00 | £95.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Cement mixer hire per week plant · from prelims | 2 wk | 2 | 2 × week | £45.00 | £90.00 | 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 | 2 wk | 2 | 2 × week | £30.00 | £60.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Flat roof joists C24 47×195 @ 400 centres roof · from flat-roof | 53.1 m | 58.4 | 59 × m | £4.60 | £271.40 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC downpipe 68mm × 2.5m with clips & shoe roof · from flat-roof | 2 nr | 2 | 2 × each | £18.00 | £36.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| EPDM rubber roof membrane with adhesives & trims roof · from flat-roof | 23.4 m2 | 26.9 | 27 × m² | £16.00 | £432.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC fascia board 175mm × 5m roof · from flat-roof | 19 m | 20.9 | 5 × length | £32.00 | £160.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Firring strips (tapered) per m roof · from flat-roof | 53.1 m | 58.4 | 59 × m | £2.00 | £118.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC half-round gutter 112mm × 4m roof · from flat-roof | 19 m | 20.9 | 6 × length | £14.00 | £84.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Gutter bracket roof · from flat-roof | 19 nr | 19 | 19 × each | £1.30 | £24.70 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Gutter fittings (outlet, stop ends, unions) per run roof · from flat-roof | 2 nr | 2 | 2 × set | £25.00 | £50.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| OSB3 18mm structural deck roof · from flat-roof | 21.2 m2 | 23.4 | 8 × sheet | £28.00 | £224.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| uPVC soffit board 300mm × 5m roof · from flat-roof | 19 m | 20.9 | 5 × length | £30.00 | £150.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Vapour control layer 50m² roof · from flat-roof | 21.2 m2 | 24.4 | 1 × roll | £42.00 | £42.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Wall plate 100×50 treated roof · from flat-roof | 17.4 m | 19.1 | 20 × m | £2.40 | £48.00 | Catalogue allowance BuildLegend catalogue · 2026-09-24 |
| Muck-away of excavated spoil (grab lorry) waste · from foundations | 2 nr | 2 | 2 × load | £380.00 | £760.00 | 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 — 12 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 | 7.53 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 | 1.30 m3 | 4 | 8 | 2× groundworker @ £30.00/hr blended | £240.00 |
| Blockwork below DPC Bricklayer · 0.70 h/m2 | 4.35 m2 | 3.04 | 4.56 | 1× bricklayer @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £136.80 |
| Hardcore, blind, DPM, insulation, mesh and pour slab Groundworker · 1.20 h/m2 · min 8h | 16.7 m2 | 20.09 | 40.18 | 2× groundworker @ £30.00/hr blended | £1,205.40 |
| Single-skin blockwork with piers Bricklayer · 0.75 h/m2 · min 8h | 20.0 m2 | 15.01 | 22.52 | 1× bricklayer @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £675.45 |
| Flat roof joists, firrings and deck Carpenter / joiner · 0.90 h/m2 · min 8h | 21.2 m2 | 19.12 | 38.24 | 2× carpenter / joiner @ £30.00/hr blended | £1,147.20 |
| Lay epdm rubber roof membrane with adhesives & trims Roofer · 0.50 h/m2 · min 6h | 21.2 m2 | 10.62 | 21.24 | 2× roofer @ £30.00/hr blended | £637.20 |
| Fascia, soffit, guttering and downpipes Carpenter / joiner · 0.50 h/m · min 4h | 19 m | 9.5 | 14.25 | 1× carpenter / joiner @ £30.00/hr + 0.5× labourer @ £30.00/hr blended | £427.50 |
| Electrical first fix: cables, back boxes, circuits Electrician · 1.10 h/nr · min 4h | 2 nr | 4 | 4 | 1× electrician @ £30.00/hr blended | £120.00 |
| Electrical second fix: faceplates, fittings, connection Electrician · 0.60 h/nr · min 3h | 2 nr | 3 | 3 | 1× electrician @ £30.00/hr blended | £90.00 |
| 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 |
|---|---|---|---|---|---|---|
| Carport | 16.74 | 8.70 | 20.01 | 21.24 | 19.00 | 8.70 |