The new house next door has a shallow foundation and because it is such a tight footprint substantial shoring was needed to stabilize both this house and the neighbors.
Garage door infill foundation.
Pouring the foundations and blocking.
You must ensure the foundations are strong enough to carry any additional masonry loads.
To span the opening of a single garage door.
As the foundation to the existing garage is not likely to be traditional it s probably a shallow slab a new foundation may be needed for the new wall.
The ends of the lintels should be cut into the existing brickwork to ensure a minimum end bearing of 150mm c if the existing floor slab was thickened at the door opening and a lightweight form of construction is proposed for the infill it may be possible to carry this infill on the existing floor.
The retaining wall on the uphill side of the foundation is ten feet high and the building will be four stories tall the maximum allowed for this infill site.
Check the condition and suitability of the existing foundation or floor when the door infill area is excavated.
As the foundation to the existing garage is not likely to be traditional it s probably a shallow slab a new foundation may be needed for the new wall.
A new inner skin on the external wall or filling in the garage door with brick block and a window will all add extra weight.