To rise, the biggest might be the cost of replacements. Everything needed to build a house has gone up in price with wage inflation. That is t going to come down maybe ever. Unlike technology houses are old school with little means of reducing expenses. Lots of companies are playing with new building methods to reduce product and production costs, but with only minor impacts

Another thing has been the demand for tier one products in starter houses. Granite, solid cabinets etc has driven the cost sky high