Glue down is more for us. The glue often costs .75/ft. If the subfloor is concrete, sealer (2 coats) adds another .50/ft. Then you add $3/ft. minimum for the install itself. Nail downs start at $3/ft. Wood floors are all we do and we are very conscious of doing our jobs to the best of our ability.
1 Home addition cost estimates of $80 to $130 per square foot for a basic family room addition is common. 2  If the home addition includes a bathroom and/or a kitchen, the room addition costs can easily escalate to $200-250 per square foot.
Most family room additions will run between $120-$250 per square foot. Most bedroom additions will be similarly priced between $120-$250 per square foot. Most kitchen additions will be cost between $175-$450 per square foot.Most bathroom additions will fall in the $180-$400 per square foot range. Most master bedroom additions cost between $150-$300 per square foot.Most additions that add a second floor over an existing one story home cost between $150-$280 per square foot.ost family room additions will run between $120-$250 per square foot. Most bedroom additions will be similarly priced between $120-$250 per square foot. Most kitchen additions will be cost between $175-$450 per square foot.