| Preliminaries | £17,640.00 |
| Site Set-Up & Establishment | £4,830.00 |
| Site set-up, welfare unit and temporary fencing | 1 | item | £2,850.00 | £0.00 | £0.00 | £0.00 | £2,850.00 | £2,850.00 |
| Temporary services, protection and general attendance | 1 | item | £1,980.00 | £0.00 | £0.00 | £0.00 | £1,980.00 | £1,980.00 |
| Access & Waste | £5,130.00 |
| Scaffolding to rear elevation, 12 week hire | 1 | item | £3,420.00 | £0.00 | £0.00 | £0.00 | £3,420.00 | £3,420.00 |
| Skip hire and waste removal | 6 | each | £285.00 | £0.00 | £1,710.00 | £0.00 | £0.00 | £1,710.00 |
| Management | £7,680.00 |
| Site management and supervision | 12 | week | £640.00 | £0.00 | £0.00 | £7,680.00 | £0.00 | £7,680.00 |
| Groundworks & Foundations | £10,452.40 |
| Excavation & Disposal | £3,516.80 |
| Reduce level dig and cart away spoil | 38 | m3 | £46.50 | £0.00 | £0.00 | £1,767.00 | £0.00 | £1,767.00 |
| Excavate for trench fill foundations | 22.4 | m3 | £52.00 | £0.00 | £0.00 | £1,164.80 | £0.00 | £1,164.80 |
| 3 tonne excavator hire | 3 | day | £195.00 | £0.00 | £585.00 | £0.00 | £0.00 | £585.00 |
| Foundations & Floor Slab | £6,935.60 |
| Ready-mix C25 concrete to foundations | 22.4 | m3 | £142.00 | £3,180.80 | £0.00 | £0.00 | £0.00 | £3,180.80 |
| Sand blinding and 1200g DPM | 42 | m2 | £9.80 | £411.60 | £0.00 | £0.00 | £0.00 | £411.60 |
| 100mm PIR floor insulation | 42 | m2 | £21.40 | £898.80 | £0.00 | £0.00 | £0.00 | £898.80 |
| Pour foundations, lay and power-float slab | 42 | m2 | £58.20 | £0.00 | £0.00 | £2,444.40 | £0.00 | £2,444.40 |
| Superstructure & Walls | £21,350.00 |
| External Cavity Walls | £15,408.00 |
| Facing brick, block and cavity materials | 78 | m2 | £118.00 | £9,204.00 | £0.00 | £0.00 | £0.00 | £9,204.00 |
| Facing bricks to match existing (PC sum) | 3.2 | 1000 | £720.00 | £0.00 | £0.00 | £0.00 | £2,304.00 | £2,304.00 |
| Bricklaying and blockwork to cavity wall | 78 | m2 | £50.00 | £0.00 | £0.00 | £3,900.00 | £0.00 | £3,900.00 |
| Structural Openings | £4,330.00 |
| Steel beam to rear opening | 1 | item | £1,650.00 | £1,650.00 | £0.00 | £0.00 | £0.00 | £1,650.00 |
| Install steel, padstones and make good | 1 | item | £2,680.00 | £0.00 | £0.00 | £2,680.00 | £0.00 | £2,680.00 |
| Internal Partitions | £1,612.00 |
| Blockwork and ties | 26 | m2 | £24.00 | £624.00 | £0.00 | £0.00 | £0.00 | £624.00 |
| Build internal partitions | 26 | m2 | £38.00 | £0.00 | £0.00 | £988.00 | £0.00 | £988.00 |
| Roofing | £9,976.00 |
| Flat Roof Structure | £2,520.00 |
| Firrings, joists and 18mm deck | 42 | m2 | £34.00 | £1,428.00 | £0.00 | £0.00 | £0.00 | £1,428.00 |
| Construct flat roof structure | 42 | m2 | £26.00 | £0.00 | £0.00 | £1,092.00 | £0.00 | £1,092.00 |
| Roof Insulation & Covering | £3,276.00 |
| 150mm PIR warm roof insulation | 42 | m2 | £28.50 | £1,197.00 | £0.00 | £0.00 | £0.00 | £1,197.00 |
| Lay and fix insulation boards | 42 | m2 | £9.50 | £0.00 | £0.00 | £399.00 | £0.00 | £399.00 |
| Single-ply membrane and trims | 42 | m2 | £22.00 | £924.00 | £0.00 | £0.00 | £0.00 | £924.00 |
| Install single-ply covering and detailing | 42 | m2 | £18.00 | £0.00 | £0.00 | £756.00 | £0.00 | £756.00 |
| Rooflights & Rainwater | £4,180.00 |
| Rooflights, 2 no. (PC sum) | 2 | each | £1,250.00 | £0.00 | £0.00 | £0.00 | £2,500.00 | £2,500.00 |
| Fascia, soffit and rainwater goods | 1 | item | £980.00 | £980.00 | £0.00 | £0.00 | £0.00 | £980.00 |
| Install rooflights and rainwater goods | 1 | item | £700.00 | £0.00 | £0.00 | £700.00 | £0.00 | £700.00 |
| Windows & External Doors | £8,020.00 |
| Bi-fold Doors | £4,680.00 |
| Aluminium bi-fold doors, 3.6m (PC sum) | 1 | each | £4,200.00 | £0.00 | £0.00 | £0.00 | £4,200.00 | £4,200.00 |
| Install bi-fold door set and make good | 1 | each | £480.00 | £0.00 | £0.00 | £480.00 | £0.00 | £480.00 |
| Windows | £3,340.00 |
| Double glazed windows, 4 no. (PC sum) | 4 | each | £680.00 | £0.00 | £0.00 | £0.00 | £2,720.00 | £2,720.00 |
| Install windows and make good | 4 | each | £155.00 | £0.00 | £0.00 | £620.00 | £0.00 | £620.00 |
| First Fix M&E | £6,478.00 |
| Electrical First Fix | £2,450.00 |
| First fix electrics to extension | 1 | item | £2,450.00 | £0.00 | £0.00 | £2,450.00 | £0.00 | £2,450.00 |
| Plumbing & Heating First Fix | £2,180.00 |
| First fix plumbing and heating, 3 radiators | 1 | item | £2,180.00 | £0.00 | £0.00 | £2,180.00 | £0.00 | £2,180.00 |
| Underfloor Heating | £1,848.00 |
| Underfloor heating kit | 42 | m2 | £18.00 | £756.00 | £0.00 | £0.00 | £0.00 | £756.00 |
| Install underfloor heating | 42 | m2 | £26.00 | £0.00 | £0.00 | £1,092.00 | £0.00 | £1,092.00 |
| Internal Finishes | £15,585.30 |
| Plastering & Screeding | £6,921.30 |
| Plasterboard, skim and screed materials | 1 | item | £2,400.00 | £2,400.00 | £0.00 | £0.00 | £0.00 | £2,400.00 |
| Plaster, skim and screed | 210 | m2 | £21.53 | £0.00 | £0.00 | £4,521.30 | £0.00 | £4,521.30 |
| Floor Finishes | £2,814.00 |
| Floor finish supply (PC sum) | 42 | m2 | £45.00 | £0.00 | £0.00 | £0.00 | £1,890.00 | £1,890.00 |
| Prepare and lay floor finish | 42 | m2 | £22.00 | £0.00 | £0.00 | £924.00 | £0.00 | £924.00 |
| Decoration & Second Fix Joinery | £5,850.00 |
| Painting and decorating throughout | 1 | item | £3,200.00 | £0.00 | £0.00 | £3,200.00 | £0.00 | £3,200.00 |
| Second fix joinery, skirting and architrave | 1 | item | £2,650.00 | £0.00 | £0.00 | £2,650.00 | £0.00 | £2,650.00 |
| Kitchen & Sanitaryware | £17,550.00 |
| Kitchen | £14,400.00 |
| Kitchen units and worktops (PC sum) | 1 | sum | £12,000.00 | £0.00 | £0.00 | £0.00 | £12,000.00 | £12,000.00 |
| Install kitchen and connect appliances | 1 | item | £2,400.00 | £0.00 | £0.00 | £2,400.00 | £0.00 | £2,400.00 |
| Sanitaryware | £3,150.00 |
| Sanitaryware to WC (PC sum) | 1 | sum | £1,800.00 | £0.00 | £0.00 | £0.00 | £1,800.00 | £1,800.00 |
| Second fix plumbing and sanitaryware | 1 | item | £1,350.00 | £0.00 | £0.00 | £1,350.00 | £0.00 | £1,350.00 |
| External Works | £6,920.00 |
| Patio & Landscaping | £3,850.00 |
| Rebuild patio and level rear garden | 1 | item | £3,850.00 | £0.00 | £0.00 | £3,850.00 | £0.00 | £3,850.00 |
| Drainage & Making Good | £3,070.00 |
| Drainage connections and gullies | 1 | item | £1,420.00 | £0.00 | £0.00 | £1,420.00 | £0.00 | £1,420.00 |
| Make good at junction with existing house | 1 | item | £1,650.00 | £0.00 | £0.00 | £1,650.00 | £0.00 | £1,650.00 |