Building prices for extension double storey
These are the prices we have received for the total cost either per metre squared or for the whole job of building a double storey extension onto your property. The total area of the job in square metres is the sum of the area of both the lower and upper floor. Usually it is considered to be the internal floor area rather than the external one. Obviously the price can vary considerably depending on the level of finish varying from a basic build which may just be for a shell to a complete finish including kitchen and bathroom fittings as an example. In general it is found that double storey extensions work out to be cheaper than single storey ones in terms of m2 costs - again depending on the level of finish.
| Detailed Description of Work | Price/Cost | Units | Location | Last Updated |
|---|---|---|---|---|
| 32 m2 double storey includes electrical/plumbing work (Edit: changed to m2 cost was £38000) | £1,188 | m2 | Swindon | 2009-10-05 |
| 4m * 5.1m double story extension under a pitched roof to the building regulations. | £12,000 | item/job | London | 2009-09-22 |
| Double storey side extension (8m x 5m) plus loft conversion. 3 bathrooms which 2 of were wet rooms. Full new rewire/central heating system, underfloor heating, new kitchen supplied and fitted, house also rendered to complete finish. | £80,000 | item/job | West Midlands | 2009-08-15 |
| Had a double storey side & rear ext, includes converting garage to room, plus new kitchen to rear of garage, 1 new bedroom above garage plus enlarging box room. Some walls removing to create larger lounge. Block paving front garden and Decking rear. | £50,000 | item/job | Bradford | 2009-05-31 |
| 40m2 double storey gable roof (Edit: price was £53000 changed to per m) | £1,325 | m2 | Surrey | 2009-05-18 |
| Early 2008 Two storey domestic side /rear extension. Utility/laundry wwc at bround floor and family bathroom at first floor. Internal ize 2.2x5m with traditional cavity wall and pitched roof over. Including tiling to both rooms ,lighting and bathroom fittings | £25,000 | item/job | Birmingham | 2009-04-28 |
| Kitchen - Ground floor / Bathroom, shower room and bedroom - 1rst floor. Central heating, moving door way, 4 radiators, moving boiler, adding doors, 2 windows and 3 velux windows. | £46,000 | item/job | Wales | 2009-04-21 |
| 4 radiators 4 rooms bathroom bedroom kitchen lounge | £45,000 | item/job | Birmingham | 2009-04-17 |
| £1000 per sqm seems to be the average in the midlands | £44,000 | item/job | Midlands | 2009-03-01 |
| 2 storey. brick. tile roof, 3 windows. 1 f/door | £38,000 | item/job | Essex | 2009-02-22 |
| 3 bedroom extension | £100,000 | item/job | Glasgow | 2009-02-21 |
| Side extension. garage, toilet and utility room downstairs, 2 bedrooms upstairs, and en-suite, movement of stairs, and internal walls. rooms plasterd, 1 rad in each room, basic sockets and single light. external retaining wall 10m, | £41,000 | item/job | Bradford | 2008-09-19 |
| ground floor 2.650 mts by 8.700mts goal post shape. 2 room. play room and kitchen knock into existing kitchen to inlarge. first floor. bedroom. ensuite knock into existing bedroom 4 radiators | £22,000 | item/job | Warwicksrire | 2008-09-09 |
| double storey extension approx 40 square metres. bedroom upstairs with en-suite, and 3 rooms downstairs including wc. | £900 | m2 | Cambridge | 2008-08-21 |
| 5 radiators, 1 dining room, 1 bedroom, 1 utility room, 1 en suite, 1 toilet, 2 set French doors, 1 front door, 3 windows. Labour for fitting kitchen, labour for fitting en suite and down stairs toilet supplied and fitted. All building ames taped and all internal joiner work complete Size of build 36 square meters. |
£33,500 | item/job | North lanarkshire | 2008-07-17 |
| 2 storey plus attic room 1000sqft added main bathroom, master bedroom ensuite, guest bedroom, kitchen diner including ground underfloor heating and new single storey lounge extension | £115,000 | item/job | Midlands | 2008-07-05 |
| 3 meters long by 6 meters wide pitch roof | £20,000 | item/job | Kent | 2008-05-28 |
| cental heating, kitchen, bathroom, downstairs toilet, conservatory, gas boiler and 1 bedroom. | £90,000 | item/job | Wembley | 2008-05-04 |
| 2 Storey extension, kitchen on ground floor with conservatory on 1st floor. Glass conservatory roof. | £35,000 | item/job | Bridgend | 2008-03-17 |
| heating underfloor 2 storey 1 large master bedroom with ensuite upstairs and an open plan room downstairs both together at 100 square metres | £50,000 | item/job | Scotland | 2008-02-17 |
| heating underfloor 2 storey 1 large master bedroom with ensuite upstairs and an open plan room downstairs both together at 100 square metres | £500 | m2 | Scotland | 2008-02-17 |
| underfloor heating. attic roof trusses. slated roof. 6no velux roof windows. timber kit construction. upvc double glazing.combi boiler.3no rooms with 1no en-suite. | £86,000 | item/job | Lanarkshire | 2008-02-05 |
| double storey extension plus dormer 5m x 8.5m including re roofing entire house. This is for the shell only but includes 4 widows 1 skylight and 1 front door | £27,600 | item/job | West yorkshire | 2008-02-03 |
| 25m2 double story extension, Garage and store on the ground floor - bedroom and en-suite on the upper floor. | £58,500 | item/job | Central Scotland | 2008-01-21 |
| Garage and store on the ground floor - bedroom and en-suite on the upper floor. | £1,170 | m2 | Central Scotland | 2008-01-21 |
| 3 rooms 4 rads | £39,000 | item/job | Lincolnshire | 2007-12-07 |
| 2 radiators, 1 room grad floor and 1 1 floor | £10,000 | item/job | Warrington, cheshire | 2007-11-08 |
| Entire project 10ft x 15ft | £29,000 | item/job | Scarborough | 2007-11-06 |
| Includes shell along with all electrical and plumbing work. Size 3 x 2.5m | £1,210 | m2 | Peterborough | 2007-11-04 |
| £1500 per m2 for double storey extension | £1,500 | m2 | Swansea | 2006-03-20 |