Realistically the cost of a third floor addition can be 50 more than other house addition projects.
Third floor addition.
A third floor addition was constructed which had to span over the existing house to eliminate interior supports which would have disrupted the first floor layout.
The third floor is built above the second floor.
Beyond practical considerations and who best to design and implement them schedules and disruption of daily routines there are neighbours.
Second floor addition with multiple rooms 1 500 sq ft.
If you are on a shorter lot and do not want to take up too much of the backyard this is a big plus.
In order to support the new floor we had to add two 4 steel columns down to the first floor foundation to support a large new header on the east side of the house.
The 2nd floor now had full ceiling heights in all rooms and closets reconfigured to provide the best storage.
A third floor addition will also require some amount of re work to the second floor to accommodate stairwell access to the upper floor.
These can be as much as 5 7 of the total cost.
Third floor there was much more engineering required to complete this job than we anticipated.
A main floor or second floor addition will often require an excavation for a foundation ultimately leading to landscaping work.
The third floor option would eliminate the need to re landscape.
Adding a third floor to one s home is difficult enough.