Passivhaus diaries: What the Denby Dale home costs

Substructure

Excavation, oversite, reduced levels, foundation trenches and disposal: £3,341.06
Concrete in foundations: £1,192.32
Cavity wall to dpc, 100mm 7KN lightweight block, 300mm polystyrene filled cavity (Dow Floormate 200), 100mm medium dense concrete blockwork/coursed natural stone in lime mortar: £5,618.11
Ground floor slab, compacted hardcore, 225mm extruded polystyrene, radon barrier, 100mm concrete slab power floated with A252 reinforcing: £8,086.14

Superstructure

Cavity walling, 100mm dense concrete block inner leaf, 3 x 100mm mineral wool batts, basalt wall ties, coursed natural stonework in lime mortar, reconstituted reinforced stone lintels: £26,188.06
100mm dense concrete block internal partitioning: £2,944.78
Steelwork to support SW corner of roof and full-height glazed screens: £1,500.00
302mm timber I-beam first floor: £2,847.30
Windows and doors: £22,969.37

Roof structure

Trusses, 500mm mineral wool insulation, wind membrane, battening, concrete interlocking tiles, timber facia, ply soffit and steel galvanised rainwater goods : £9,995.16

Internal joinery work

Chipboard flooring to I-beams, softwood closed staircase and balustrading, OSB board to first floor ceiling, internal doors, linings and skirting: £11,340.86
Stud partitioning with sound insulation: £856.81

Finishes

15mm two-coat wet plaster to all block walls, 12.5mm plasterboard and skim to ceilings and studwork: £8,869.37

Services and fittings

Bathroom and shower room: £8,500.00
Kitchen: £5,000.00
Electrical installation: £6,500.00
Space heating and hot water (natural gas): £3,000.00
MVHR: £4,800.00
Alcohol stove (focal point): £1,000.00
Timber laminate flooring to kitchen and living areas: £2,500.00

External

Drainage: £2,500.00
Site storage: £1,500.00

Total

£141,049.34