Upper-Level Addition Planning

"Before" To-Do List for Upper-Level Additions

Upper-level house additions dramatically alter the look of your home, but they also affect the home in less visible ways. Consider these items before you build a second-story addition.

Always check zoning laws.
Depending on restrictions in your area, you might need to maintain your home's footprint or incorporate substantial upgrades to the existing house to meet building codes.

Talk to a professional.
Have an architect or structural engineer evaluate the house to make sure it is structurally sound and can support the weight of an upper level. Often attic floor joists are smaller-size ceiling joists that need reinforcement.

Evaluate the cooling and heating systems.
Generally existing units are sized to take care of the current square footage. An addition may require either system upgrades or installation of a second unit.

Prepare for a mess.
Outside walls are usually adequate to carry the load of a second story. Most modifications happen inside the house. Structural columns need to go down to the basement, and plumbing and heating chases need to connect the upper level.

Plan for Stairs.
Allow space for a safe and comfortable stairway. It's easy to underestimate the square footage required for stairs.