4m Small Extension

Best Answer

"Are you using building control? Because usually they decide on the depth of footings depending on what the ground is like, but usually it’s around 1m deep but could be deeper if there’s trees etc. You can furfix the new brickwork against the old or tooth it out, but again usually building control would tell you what they prefer but if your not using them you could do either"

""The depth depends on what the ground is like you have to dig to solid ground. For a single storey building strip foundations will typically be 450mm wide and at least 200mm deep, and for two storeys 600mm wide and 200mm deep."

"30cm width
1.5m depth
May require reinforcements"

"Hi there you are looking around £12,000 with the material."

"In clay. 1 metre deep x 600mm wide.
On sand 750mm deep x 600mm wide But dependant if trees are within 5 meters of the build.
Building are unlikely to allow toothing in but use a firfix/crocodile ties to attach the brickwork/blockwork to the existing house."

"Generally, the required depth of a footing for an extension is a minimum of 1 meter deep depending on the ground you are on. Sandy ground or clay 1m is fine."

"The footings for an extension are usually 1m deep and 60 cm wide."

"The depth is determined by the ground conditions and building control, they would normally want you to go as deep as the original house footing and as said depending on the conditions maybe deeper, as regards the walls just use the wall tie starter kits, their really good and perfectly acceptable"

"Firfix against existing property foundation same level as existing property thanks."

"You do have to go down 1 Meter for a curtain for a porch or a extension with either a flat roof or a pitched roof and if you do need any more help their contact Greenacres landscape and general building"