If your home is square or rectangular, multiply the lengths of two adjacent sides and that is the actual footprint. If you have an irregular home, break it up into smaller rectangular pieces, measure each, do the calculation on each and add the pieces together.
If you need the actual living space you will have to perform this same calculation on each living area. In most cases garages and basements are not counted as living areas.
If you need the actual living space you will have to perform this same calculation on each living area. In most cases garages and basements are not counted as living areas.