Census Bureau puts the cost higher at an average of 397800 and the National Association of Home Builders NAHB figure is higher still at 485128. Now before you rush off to the bank hang on. 19 Free House Building Budget Templates Ms Office Documents Remodel Budget Worksheet Budgeting Budget Template How much will a self-build cost. How much should i budget for building a house . According to HomeAdvisor the average cost to build a new home in 2021 is 297953. Thats the size of house you should start looking for on new home plan web sites or elsewhere as discussed on my How to Read House Plans. You might think I want the house of my dreams designed exactly to my specifications - price bedamned Building your home yourself can make those dreams come true as youll be in charge of absolutely. The average cost to build a house is more than 485000. From where the house is located to the size and cost of the block its built on to the finishes selected and even the impact of Covid th...