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Groundwork & Foundations

how wide are extension footings

Anonymous user 23 February 2024 - 2.34 PM

i am planing a single storey extension build and wondered how wide the foundations will be. I know they will need to be a 1m deep

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10 Answers

Walkden Bricklaying
Rating: 5 out of 5
61 reviews
Huddersfield
the standard minimum size should be 600mm wide for a standard width cavity wall of 300mm. (100mm brickwork, 100mm cavity, then 100mm blockwork). there should be a minimum of 150mm of concrete at either sides of the walls to = 600mm in total but all jobs and ground conditions vary, so your best advice is to check with your local building control which can be contacted through your local council.
Answered13 December 2011
58

Anonymous user

the standard footing width with a 100mm caverty wall will be 450mm, make sure to consult plans because this may vary due to ground condition and type of footing all info should be on a comprihensive set of plans,
Answered22 November 2011
37

Affordable construction
Rating: 5 out of 5
12 reviews
Waterlooville
600mm is the expected width and one mtr minimum depth
Answered22 November 2011
34

James White Brickwork
Rating: 4.7 out of 5
79 reviews
Morpeth
Typically 450mm wide. That will allow for, Brickwork - 100mm cavity - Blockwork And depth just depends on ground condition, 600mm would be good enough if you hit good clay..
Answered22 November 2011
24

S1 Builders Norfolk
Rating: 5 out of 5
19 reviews
King's Lynn
the best way to find these details out are to give the local building control officer a call as they will be more than helpful for you
Answered22 November 2011
19

Anonymous user

Normally 600mm wide.
Answered22 November 2011
17

R.Hughes Building and Conservation Ltd
Rating: 5 out of 5
40 reviews
Wellingborough
Normally 450mm but its dependant on ground conditions. Rick
Answered22 November 2011
12

K W Contracting Limited
Rating: 4.9 out of 5
102 reviews
Shrewsbury
they are generally 600mm wide but check with you Building Control Officer
Answered22 November 2011
11

Anonymous user

Your footings will need to be 1metre deep & 600mm wide.Unless you have any issues,Your building inspector will advise you on this.
Answered22 November 2011
9

Anonymous user

600MM
Answered22 November 2011
9