How Much Does Hardwood Floors Cost? Installing a standard solid-strip hardwood floor averages about $8 a square foot for materials, insulation and site finishing, and up to $12 a square foot for wide pine planks, or $1,150-$1,750 for a 12x12-foot room. Factory-finished wood starts at $8 a square foot installed, but generally runs $10-$14, or $1,140-$2,000 for a 12x12 space.