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.
Answer: it is best to estimate the cost of adding the bedroom separately from the cost to add a bathroom since the cost of each varies greatly. The average cost per square for an additional medium bedroom is approximately $125 while the cost to add on a bathroom is $300 or more. Try our bedroom addition cost calculator and our bathroom addition cost calculator for a free instant home addition estimator.