Building prices for extension single storey
Total cost of project and m2 costs for having a single floor extension added to your home. The area of the house is usually specified by its internal floor area though sometimes it can be the external area. Also, pay attention in the detailed comments to what was and wasn't included in the build costs. A simple construction may be just a shell structure (basic plumbing, electrics and building work) whereas many people will specify the actual cost i.e. after you have put in all the fittings (e.g. new kitchen or bathroom/shower suite) furnished and decorated (including carpets or other type of flooring) the extension.
| Detailed Description of Work | Price/Cost | Units | Location | Last Updated |
|---|---|---|---|---|
| Single storey extension to living space, no windows or doors, pitched roof. Knock through and make good inside. | £5,000 | item/job | Surrey | 2009-09-24 |
| extention length 5910.width 4820.foundation walls are 3course inside wall.2 course outside wall.super structure 11 course high.with 1800 patio door. | £1,500 | item/job | Nairnside | 2009-08-24 |
| Single story extension to lounge, pitched roof with double ridge marley tiles upvc facias all drainage, upvc windows/doors, all steel (inc calculation) and lintels, electricals, plastering and stud work. All materials for above. | £13,550 | item/job | Northamptonshire | 2009-07-27 |
| sunroom, pitched tiled roof, pvc windows all round with french doors. one radiator and 4 double sockets and roof light. slabs round extension and all rubbish taken from site. 16 meters squared. | £1,000 | m2 | Aberdeen | 2009-05-29 |
| 30m2 Single storey extension. Remove 2 walls and install RSJ for kitchen and dining room. Shell only + plasterboad ceiling plus move soil stack. 6m opening to rear of extension with steel bean. Supplying own folding sliding door and window (extra £8000). No electrics or plumbing. | £23,000 | item/job | Kent | 2009-02-25 |
| single story extension 20meters shell fixtures and fitting no rads move boiler and electric box plumbing and electric plus plaster fit rsj and knock out wall | £17,000 | item/job | Westmidlands | 2009-02-03 |
| Remove existing conservatory and replace on same foot print a more substantial structure. Plumbing, electrics, three radiators, plastering etc. (Edited from previous submission to be in metre squared) | £1,560 | m2 | Hampshire | 2008-12-04 |
| 5 metre by 3.4 metre single story pitched roof extension with 2 velux rooflights, large patio doors. Construct internal walls to make a separate toilet, provide drainage, external retaining wall (6.5metres in length by 900mm high)and steps; pave area outside patio doors (12sq metres). Edit: Changed to price per meter 2 was £18500 | £1,089 | m2 | Swansea | 2008-12-01 |
| Single storey Conventional pitched roof
kitchen extension to provide Breakfast area. Internal size 3.1 x 3.3 Metres. Two windows and French Doors. Complete with heating and Electrics but no decoration or floor finish. Standard brick built. Planning and building regs complied with. No access problems but required relocation of water main. |
£38,000 | item/job | North Surrey | 2008-07-28 |
| 4.8x3.5 single storey 2 upvc windows and pair of French doors with pitched tiled roof (edit: changed price to per m2 Total was £18,000) | £1,071 | m2 | Buckinghamshire | 2008-07-07 |
| 25 square metres . Remove existing conservatory and replace on same foot print a more substantial structure. Plumbing, electrics, three radiators, plastering etc. | £39,000 | item/job | Hampshire | 2008-07-01 |
| Central Heating: 2 radiators,1 rooms, 1 BATHROOM | £20,000 | item/job | WEMBLEY | 2008-06-16 |
| Single storey side extension. Pitched roof with gable. En- suite bedrooom. Labour only in shower en- suite. 2 rads. Customer supplied windows. Patio to rear and paved path to side. | £27,000 | item/job | Gillingham, Kent | 2008-04-29 |
| kitchen,pitched roof, 1 radiator,electrics,plumbing | £10,000 | item/job | Cambridgeshire | 2008-04-10 |
| 28m2 Kitchen extension; Timber Frame, block and render. Including new Kitchen, new Gas CH Boiler. 35m2 engineered flooring with underfloor heating. | £40,000 | item/job | EH38 | 2008-03-26 |
| 4 radiators | £35,000 | item/job | Norwich | 2008-03-09 |
| Extension to the kitchen Timber Frame, block and render. Including new Kitchen, new Gas CH Boiler. 35m2 engineered flooring with underfloor heating. | £1,250 | m2 | EH38 | 2008-03-05 |
| Single story extension, Pitched roof, Patio doors on two sides. One room bedroom, with private bathroom, no toilet. overall size 4.5m x 6m | £15,000 | item/job | Yorkshire | 2008-02-15 |
| 10m x2.4m ,200mm block wall shell with three openings,insulated concrete floor,50% new foundations,sloping roof,wet dash render,lead work coupes,not joinerwork or internal finish | £16,500 | item/job | Fife | 2008-02-01 |
| one room+one batroom build including fundation, flat roof, under floor heating, new boiler, lights, 2windows+4doors rendering+plastering including all materials | £42,000 | item/job | Croydon | 2008-01-30 |
| BED EXTENTION TOBE 3600 X 3000 X 2100 INTERNAL SIZES TO INCLUDE 2 OFF SOCKETS AND LIGHT PLUS 1 OFF SENSOR FOR ALARM 1 OFF DOOR 1 OFF WINDOW IN GOLDEN OAK UPVC FLAT FELT ROOF | £6,200 | item/job | CANNOCK STAFFS | 2008-01-09 |
| Costs is really just for the shell as did much of the internal work/labouring my self. Floor area 20m^2 with pitched roof Includes all materials and additional labour Total cost of extension £12000 | £594 | m2 | Nottingham | 2007-11-02 |
| Build 2 new exterior kitchen walls. Knock down existing kitchen wall to create a larger kitchen and a new utility room. The plans require that the existing kitchen wall is replaced with a RSJ.The single storey extension has a pitched tiled roof | £25,000 | item/job | Northamptonshire | 2007-10-24 |
| Dig out & lay foundations for 3x walled structure at side of house. Perspex roof, fully plastered. 15m2 in total £341/m2 | £5,300 | item/job | Southport, Merseyside | 2007-10-16 |
| Needed extra space for downstairs kitchen. Kitchen not included, supplied and fitted separately at additional cost of £5k | £1,050 | m2 | Rotherham | 2007-10-07 |
| Needed more room for kids and a home office. 4.5x3.5m ground floor extension. Total cost £19000 | £1,206 | m2 | Darlington | 2007-09-04 |
| Downstairs toilet and washroom. Interior needs finishing up Pitched roof 12 m^2 | £12,100 | item/job | Worcester | 2007-08-28 |
| Double skin brickwork, inc mat, qualified builders and guaranties. | £500 | m2 | Teesside | 2006-12-18 |
| Shell only | £500 | m2 | Shropshire | 2006-06-25 |