House Addition Costs

Types

• The type of home addition you want will greatly affect the overall price. For example, a bathroom addition can cost anywhere from $3,000 to upwards of $80,000, depending on bathroom features, building supplies and whether the room will be added on to the home or converted from a pre-existing space, according to Costhelper, a website geared to helping consumers learn the costs of things.

Size

• Depending on the size of your house addition, you may need an abundance of materials and even building permits. For example, adding a 1,500-square-foot second story to your home can cost $105,000 to $450,000, depending on whether you do the work yourself or hire a contractor, according to Costhelper. Alternatively, a 400-square-foot living room addition may only cost $10,000 to $20,000 if you build it yourself.

Considerations

• You will still be paying for your home addition even after the project is completed because of a tax increase. A home addition can increase your taxes based on the size of the addition. For an estimate on how much your taxes will increase, contact your local property valuation office.