I'm hoping for a new build on a plot of land and the footing will be within the 3m to the neighbour garage which is on the boundary line, it's a precast sectional garage and as far as I know it's on the thick concrete base with no footing, if my new build footing is within 3m and deeper than the neighbour footing then the party wall act is in force. Do I still need the party wall act if there's no footing but just a concrete base? The garage is freestanding