| Foundation | | |
| Walls | | |
| Roof | | |
| 4.1 | Excavate and dispose of top soil/subsoil to required level to install piles and construct reinforced concrete ground beams | | £4,090 |
| 4.2 | Supply and install 18 steel screw mini-piles to meet required loadings as shown on the drawings | PC Sum | £20,235 |
| 4.3 | Supply materials and construct 8 reinforced concrete ground beams as shown on the drawings | | £7,285 |
| 4.4 | Supply materials and construct beam and block concrete flooring with specified void space and vents | | £4,680 |
| 4.5 | Supply and install one steel column as specified on the drawing | | £1,685 |
| 4.6 | Supply materials and construct retaining walls as shown on the drawings | | £6,640 |
| 4.7 | Supply and apply waterproofing membrane to all external walls that lie below ground level | | £5,205 |
| 4.8 | Supply materials and construct floor build-up including insulation, screed and underfloor heating (final floor finish client supply) | | £5,635 |
| 4.9 | Supply materials and construct new internal and external walls from reclaimed brick, insulated block, plywood and plasterboard finishes | | £30,550 |
| 4.10 | Open up and rebuild existing wall for new windows and doors, replacing coping stones after installation | | £1,975 |
| 4.11 | Supply and install 5 high-level windows to the dimensions shown, with lintels/steel beams and cills | | £7,385 |
| 4.12 | Supply and install patio doors to the dimensions shown, with lintel as specified | | £6,920 |
| 4.13 | Supply and install two external doors with steps as required for specified floor levels | | £4,680 |
| 4.14 | Install concrete padstones and air/ventilation vents as shown on the drawings | | £625 |
| 4.15 | Supply materials and construct new roof with steel beams, timber rafters and trimmers as specified | | £11,890 |
| 4.16 | Install two low profile lanterns to manufacturer requirements (client supply) | | £930 |
| 4.17 | Roof build-up: rubber roofing, firrings, plywood, insulation layers, dropped ceiling and plasterboard/skim finish to achieve required fall | | £15,130 |
| 4.18 | Supply and install battens, upstands, ventilation and coping details to top of new walls (colour to client choice) | | £4,555 |
| 4.19 | Lift coping stones on existing wall, install DPM and reinstate coping stones with pointed joints | | £270 |