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.
It depends. If you add something simple like a bedroom or family room the cost will be $100 to $150 per sq foot. If the add-on includes a bathroom, it will be much more.It also depends on your existing home.n the low end if this 500 sqft will be a 2 car garage then possibly you can build it for $100 a square foot..depending on who you hire, how much work you do yourself. if this new space will be a big kitchen and family room then it could easily cost $200k or even $300k depending on your taste.