Cut the cost of beams
An extension open to the original house is what many of us are after. If you’re prepared to leave part of an existing wall in place or to include a supportive column with the result that a shorter steel beam is needed to take the load, you could save. It doesn’t have to compromise your design. A section of wall could help create a broken-plan effect (where the space is partly broken up into separate areas), and a column could be a decorative feature.