Passivhaus diaries: What the Denby Dale home costs
The Green Building Store reveals the costs behind the Passivhaus home it's building in West Yorkshire
Substructure
Excavation, oversite, reduced levels, foundation trenches and disposal: £3,341.06Concrete 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: £26,188.06100mm 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 : £9,995.16Internal joinery work
Chipboard flooring to I-beams, softwood closed staircase and balustrading, OSB board to first floor ceiling, internal doors, linings and skirting: £11,340.86Stud 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: £8,869.37Services and fittings
Bathroom and shower room: £8,500.00Kitchen: £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: £2,500.00Site storage: £1,500.00
Total
£141,049.34Postscript:
Costs include for prelims, overheads and profit. Not included are: garage, any external works, service connections, decorating, and any sun shading work
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Readers' comments (7)
John Wilson | 4 Jun 09 12:21 pm
How many square metres is the house? And will you be doing any tests to see if the reality matches the theory?
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Chris Herring | 10 Jun 09 12:29 pm
The total floor area on 2 floors is 118 m2. We will be monitoring the building with the support of Leeds Metropolitan University, and of course will publish results in due course.
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peter Harris | 26 Jun 09 7:00 pm
Am I right that there is no thermal hot water allowed for in the construction? Seems a lost opportunity Peter
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Bill Butcher | 10 Jul 09 1:13 pm
Dear Peter, We will at the very least make the house solar thermal hot water 'ready'. We are also looking into a new local authority grant scheme against a charge on the property. We will elaborate later.
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Sophie Phillips | 20 Jan 10 11:42 am
Hi Bill, Just wondering what the costs are for project development and design work. From my limited experience of PHPP I know its a very thorough and detailed programme, but this means it takes a really long time. So these costs are bound to be higher for the first PassivHaus's that are built but hopefully drop as designers and architects become more experienced in the principles and PHPP. Thanks, Sophie
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Bill Butcher | 20 Jan 10 1:22 pm
Sophie, I was hoping I was going to get away with no one asking this question! We at Green Building Store/Company have used this project to learn not only how to use Passivhaus Planning Package (the software programme for designing) but about the necessary components and their interaction with the build. We have developed our product range alongside the design process so I find it difficult to separate. However the AECB's Carbonlite PHPP Certification Process manual gives figures gained from the German experience. Using an outside PHPP Consultant with all the help an inexperienced design team would need might be 10000.00 including certification. An experienced design team, they suggest, gets this down to 4000.00 per project. I hope this goes some way to answering your question.
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AJ FLEET | 10 May 11 8:43 pm
Are these costs inclusive or exclusive of VAT?
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