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| The contest | ||
| OSM | Traditional build | |
| Round One: Construction costs (capital costs): | ||
| £860,000 | On-site workers – 30% | £1,380,000 |
| £740,000 | Manufacture – 26% | £270,000 |
| £340,000 | Plant overheads and profit – 12% | £240,000 |
| £910,000 | Materials – 32% | £1,110,000 |
| £2,850,000 | TOTAL | £3,000,000 |
| Round Two: Maintenance costs per unit (revenue costs): | ||
| £18,000 | General repairs | £30,000 |
| £3000 | Window replacement | £6000 |
| £6000 | Door replacement | £6000 |
| £12,000 | Cleaning/painting facade | £24,000 |
| £5000 | Roof covering renewal | £5000 |
| Repointing | £5000 | |
| £30,000 | Internal redecoration | £30,000 |
| £13,000 | Fittings renewal | £13,000 |
| £20,000 | Heating installation | £23,000 |
| £40,000 | Ventilation installation | £45,000 |
| £28,000 | Electrical installation | £31,000 |
| £175,000 | TOTAL | £188,000 |