Material costs of building the extension
This is the total material costs for building the extension based on 2007 costs.
As I undertook all the work myself there was no builder, contractor or other costs other than those I had to the local council.
If I had used a managing builder I'm sure my costs would have been several tens of thousands of UK Pounds so I saved myself an awful lot of money and learnt a lot too.
If you have the time - have a go yourself!
| Size | Number | Cost | VAT | Total | |
| Building notice | £310.00 | ||||
| Moving the gas pipe | £455.90 | ||||
| Skip hire | 6 Metre | £155.10 | |||
| Floor grinder | £55.81 | ||||
| Electrician sign off & connection | £130.00 | ||||
| Tool hire | |||||
| Kango masonary saw | day | £47.00 | |||
| Electric bolster hammer | weekend | £28.50 | |||
| Window | |||||
| Window casements | 50 x 75 par x 2.4m | 6 | £28.40 | £4.97 | £33.37 |
| Wood filler | £4.98 | ||||
| Wood glue | £6.40 | ||||
| Spacer | 44mm x 12mm x 2.4m par | 2 | £1.29 | £2.58 | |
| Window frame | 69 x 94 mm x 2.4m par | 5 | £62.60 | ||
| Lead came | 16mm x 5mm | 2 | £5.28 | £0.92 | £6.20 |
| Lead came | 10mm x 5mm | 10 | £16.60 | £2.91 | £19.51 |
| Roundals | 3 | £9.57 | £1.67 | £11.24 | |
| Whiting | 1 | £0.85 | £0.15 | £1.00 | |
| Cement | 5kg tin | 1 | £5.95 | £1.04 | £6.99 |
| Shipping cost | £6.99 | £1.22 | £8.21 | ||
| 3mm glass panes | 118mm x 148mm 3mm | 54 | £27.00 | ||
| Brass butt hinges | £13.96 | ||||
| Gimp pins to fix lead lights | £1.30 | ||||
| Putty | 2 | £3.96 | |||
| Primer paint | £11.40 | ||||
| screws | 80mm x5mm | £1.30 | |||
| Door Frame | |||||
| 69 x 94 mm x 2.4m par | 3 | £37.56 | £6.57 | £44.13 | |
| Drains & water | |||||
| Water pipe | 3/4" Primo coupling | 1 | £10.87 | £1.90 | £12.77 |
| 22mm adapter | £1.68 | £0.29 | £1.97 | ||
| Clay pipe coupling | £10.98 | ||||
| Foundations | |||||
| Sand | 1 tonne bags | 3 | £117.16 | £20.50 | £137.66 |
| Cement | Bags | 24 | £76.08 | £13.31 | £89.39 |
| Aerated Blocks | 20 | 1 | £16.80 | ||
| Steel reinforcing rods | 3 | £20.52 | £3.59 | £24.11 | |
| Floor slab | |||||
| Timloc telescopic vents | 4 | £31.32 | £5.48 | £36.80 | |
| Timloc extensions | 4 | £31.32 | £5.48 | £36.80 | |
| Timloc drain pipe adaptors | 4 | £19.20 | £3.36 | £22.56 | |
| Timloc airbrick | 2 | £5.48 | £0.96 | £6.44 | |
| Drain pipe | 4 metre | 1 | £20.98 | ||
| Sealing tape (to seal vents) | £7.38 | ||||
| Black DPM | 25m x 4m | 1 | £32.84 | ||
| Inspection chamber cover | 1 | £101.05 | |||
| Steel reinforcement mesh | 3.6m x 2.0m (+delivery) | 2 | £148.00 | ||
| RC30 ready mix concrete | 2 cubic metres | £258.50 | |||
| Walls | |||||
| Aerated Blocks | 1 pallet @ 100 | 1 | £79.80 | ||
| Aerated Blocks | 35 | £29.40 | |||
| More aerated blocks | 30 | £24.00 | |||
| Rudgewick Red Multi | 3 Pallets @ 390 bricks pp | 3 | £671.46 | ||
| Rudgewick Red Multi | 50 | £28.20 | |||
| Wall ties | 125 | £14.25 | |||
| Insulation retaining clips | 125 | £10.10 | |||
| DPC | 30M | 1 | £5.99 | ||
| 85mm Dritherm insulation | 1200x455mm (14 per pack) | 3 | £123.37 | ||
| Tiles to insert | 40 | £14.78 | |||
| Lintel | 1.2mm | £24.68 | |||
| Lintel | 2100mm | 1 | £47.29 | ||
| Roof | |||||
| Roof joists | 3m - 150 x 47mm | 12 | (Total price) | £168.28 | |
| Wall plates | 5.4 - - 150 x 47mm | 2 | |||
| Rafters | 2.4 - 150 x 47mm | 11 | |||
| Additional joists | 3.6m - 150 x 47mm | 3 | £40.75 | ||
| Rawlbolts | 6 | £26.88 | |||
| Expandite wall tie-bars | 2.3 metre | 3 | £60.00 | ||
| Various bolts, screws and plates | £60.00 | ||||
| Right angle brackets | 26 | £30.42 | |||
| Wall plate straps | 1 metre | 4 | £8.72 | ||
| Tile battons | 200metre | £76.70 | |||
| Extra tile battons | £12.94 | ||||
| Barge and soffit boards | 150 by 20mm PAR | £73.85 | |||
| Breathable membrane | 30 metre | £39.98 | |||
| Clout nails for tiles | 1.5" | £7.48 | |||
| Nails for battons | 2" | £6.21 | |||
| Roof felt | 5 metre | £5.38 | |||
| Reclaimed clay tiles | 900 | £581.63 | |||
| Reclaimed clay tiles | 400 extra tiles | £258.50 | |||
| Waney wood for gables | 5 off 3.6 metres | £83.86 | |||
| Lead flashing, 3m x 240mm | 3 | £113.97 | |||
| 2.4 x 1.2m by 50mm insulation | 1 | £25.98 | |||
| 2.4 x 1.2m by 90mm insulation | 4 | £162.15 | |||
| Floor slab | |||||
| Bitumen masic | £7.99 | ||||
| 2.4 x 1.2m by 90mm insulation | 4 | £103.92 | |||
| Floor screed sand and cement | £89.62 | ||||
| Internal walls | |||||
| 40mmx25x2.4m wood | 24 | £47.52 | |||
| 70mmx38x2.4m wood | 10 | £26.80 | |||
| Miscellaneous timber | £90.82 | ||||
| Frame fixing screws (packs of 16) | 7 | £59.36 | |||
| 12.5mm moistureproof plasterboard | 6 | £50.88 | |||
| 12.5mm palsterboard | 5 | £22.96 | |||
| 2" nails | £2.98 | ||||
| Yale night latch for rear door | £39.98 | ||||
| MDF sheet | £8.68 | ||||
| Skirting & architrave@2.4m | 13 | £68.25 | |||
| Cladding @1.8m | 8 | £42.00 | |||
| 38mm x 19mm sawn timber | 2 | £8.42 | |||
| Floor tiles | 3 | £44.94 | |||
| Tile spacers | 2 | £5.96 | |||
| Tile cutter | £29.98 | ||||
| Floor tile adhesive | 3 | £77.94 | |||
| Paint | £39.84 | ||||
| White wall tiles | 10 | £69.80 | |||
| White tile edging | 2 | £6.96 | |||
| Skirting board | £44.72 | ||||
| Double glazing | £168.74 | ||||
| Glass bead & screws | £32.07 | ||||
| Paint and stuff | £69.36 | ||||
| Step quarry tiles | £35.43 | ||||
| Paint brushs | £12.94 | ||||
| Electricals | |||||
| 5-way Consumer unit | 1 | £58.98 | |||
| 2-way Consumer unit | 1 | £11.98 | |||
| MCBs | 6 | £50.88 | |||
| 45 Amp pull cord switch | £11.98 | ||||
| ceiling pull cord switches | 2 | £5.58 | |||
| 10m 10mm cable | 10 mtres | £32.98 | |||
| 5-way Consumer unit | 1 | £58.98 | |||
| Cables, sockets, sleeving etc | £113.26 | ||||
| 2w consumer unit for house end | £13.24 | ||||
| 16 amp breaker | £8.48 | ||||
| 2-way light switch for kitchen | £5.88 | ||||
| Shaver socket | £12.75 | ||||
| Extractor fan for shower room (delay) | £37.98 | ||||
| Extractor fan for utility room | £32.98 | ||||
| Metal cable cover @ 2.4m | 3 | £4.15 | |||
| Black Cable ties | £3.40 | ||||
| Earth clamps | 3 | £4.44 | |||
| 5m 100mm cable for shower | £15.48 | ||||
| Plumbing | |||||
| Single radiator, 1000x50mm | 1 | £32.40 | |||
| 15mm copper pipe | 3 | £15.78 | |||
| Towele3 radiator | 1 | £99.00 | |||
| Shower trap | 1 | £8.48 | |||
| Shower tray, 900x900mm | 1 | £79.98 | |||
| Waste stuff | £10.26 | ||||
| copper piping, connectors, valves etc | £208.99 | ||||
| Mira shower | £164.98 | ||||
| Bolts to mount basin | £0.60 | ||||
| various 15mm bits | £11.25 | ||||
| Toilet connector | £8.98 | ||||
| offset bends | 2 | £6.36 | |||
| various seals and bits | £41.80 | ||||
| Toilet pipe extension | £8.85 | ||||
| Shower enclosure | £349.00 | ||||
| Miscellaneous plumbing | £74.52 | ||||
| Guttering | £58.40 | ||||
| Floor | |||||
| Floor self levelling compound | £7.28 | ||||
| ready mixed cement | £6.35 | ||||
| Tile spacers | £2.48 | ||||
| Diamond electric tile cutter | £29.98 | ||||
| Floor tile adesive | £43.96 | ||||
| PVC sealer | £9.98 | ||||
| 3 tile packs for shower room | £44.94 | ||||
| 7 tile packs for utility room | £90.86 | ||||
| sheet steel to cover channels | £12.94 | ||||
| Fittings | |||||
| Cupboard | £105.88 | ||||
| Door furniture | £22.29 | ||||
| Miscellaneous | £48.98 | ||||
| Total to date | £8,551.16 | ||||