New extension concerns

Question

Hi,

I live in a semi-detached house. My new neighbour is building a single story extension to the front side and back and a planning application was approved for the extension. No application was made for the back toom extension as it is within 3m. 

They built the foundation exactly in line with boundary line that we agreed on. Foundation is about 50cm wide. Now, they have started building a wall and built it up to the DPC, back filled soil around the wall but dont think it was inspected since the foundation was dug. The new wall is built right on the edge of the foundation and exactly in line with the boundary line leaving no space whatsoever between the wall and boundary line. Is my new neighbour allowed to build the wall so close to the boundary line and on the edge of the foundation, and how will this impact the roof on the new extension as i have told them that roof should not overlap the boundary line into myside?  Your advise would be appreciated.

Kind regards

Ref

John · Accepted Answer

Well when building a wall on a boundary line it is generally common practice to lay back 100mm off the accepted line, I myself have always done so & I have built many. As regards the law on this matter you would need to seek legal advice.

Mickey · Answer

Should be inspected at damp and before concrete was laid

Ade · Answer

Hi.
No wall should be built on the edge of a concrete foundation. If there is a cavity wall, concrete footings should be 600mm wide.Usual practice is at least 100 mm back from the edge.Although the neighbour may have planning permission they should have registered with  the local council Building Control to ensure all Building Regulations are followed and regular stage inspections are completed especially in the light of the new Part L regulations.As for boundary disputes you would need to take legal advice

Sanj · Answer

Hi. Firstly building control should have passed off the footing depth and width before the builder poured in the concrete. If building control is not involved then they are cowboys. Whenever we build a rear extension such as yours we leave a minimum 50mm gap, usually 100mm if we can that will allow the undercloak/tiles to overhang by 50mm if it's a pitched roof. Call building control and see what they have to say.

Alan · Answer

The brickwork should sit in the footing and not on the edge of it. If for any reason the ground should move the bricks are not seated properly and could potentially come down. Nothing should pass over the boundary line.

Peter · Answer

The is a thing called the party wall act there should be 100mm step back from the boundary off your property.
For 2 reasons 
1, when you excavate the footings you should have 100mm spread off concrete from the face off brickwork to the outside of your footing excavation ( this is so you don’t encroach upon your property) 
2, for any roof overhanging ( so it doesn’t encroach onto your property ) 
All footings should be inspected before concrete is poured or photographed evidence

Barry · Answer

Their roof must not cross the boundary, that includes the guttering.

If a building inspector is familiar with the work of a particular builder they may request photos of the work.

Stephen · Answer

The extension should be built within a 100mm from the edge of the extention but if you call the local  planning  they would advise  and as you say the roof could pertude over on to your property so if you was to have a extension you would have to set it right back on to your land as they would be to far over

Michael · Answer

Your local building control officer at the council who would be overseeing the build is the person to answer your concerns , and rectify any grievances under the third party wall act 👍🏻

William · Answer

Normally you try to have brickwork or block work at least 50mm from edge of footing and you are correct the roof isn’t supposed to breach boundary line . If in doubt raise concerns with local council they have to inspect if you do

New extension concerns

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