There are many ways to try to reorganize or repurpose space in our homes, but there comes the point in time when there’s nothing more to be done. Investing in a home addition is the best way to stop the endless cycle of finding usable space in a home that no longer has any. Before starting a home addition project, however, you must consider home addition costs and the factors that influence them. 

Home Addition Costs

Average Cost: $46,000

Low Cost: $21,000

High Cost: $73,000

According to HomeAdvisor, the national average for a home addition is about $46,000. However, this entirely depends on what kind of rooms you are adding during a home addition. Lower-cost home additions don’t require extensive or any plumbing and electrical services. On the opposite end of the spectrum, higher-cost home additions include extensive plumbing and electrical services and cost well above $50,000. 

These prices can be driven up by many factors, including rooms to be added during the addition, the size of the addition, and the electrical and plumbing services required.

Living Room Addition

Home Addition Types

One of the first factors that dictate home addition costs is the types of rooms you add to your house. Below is a list of several and their estimated costs, according to HomeAdvisor. 

  • Attic conversion into livable space: $40,000
  • Bathroom addition: $35,000
  • Dining room addition: $20,000-$45,000
  • Kitchen addition: $20,000-$90,000
  • Laundry room addition: $8,070
  • Living room addition: $20,000-$45,000
  • Mudroom or sunroom addition: $8,000-$16,000

Factors that Influence Home Addition Costs

Home additions cost more than typical remodeling or renovation services since many more factors are involved. If a home addition is being made to the ground floor, for example, a new foundation, wood, and shingles will need to be added. Furthermore, more pressure exists to make the addition fit in with the existing property and the surrounding neighborhood. 

Size and Scope

Regarding home addition projects, the bigger the space, the higher the price. According to HomeAdvisor, most home additions cost $80 to $200 per square foot, including materials and labor. However, if the home addition is a second-story addition, $300 to $500 per square foot is the rough estimate. 

Type of Addition

There are many different types of additions homeowners choose to make when they consider home addition costs. Some of the most common additions include bathrooms and bedrooms, though others are more geared towards enlarging a space. This could mean a bump-out for a larger kitchen or creating an addition for an in-law suite. 

For example, adding a bathroom could cost $35,000, while a larger, more luxurious bathroom at 100 square feet could cost $90,000. Bathroom additions, like kitchen additions, are highly expensive due to the plumbing and electrical work required. 

Kitchen Remodel

Electrical and Plumbing Work

Electrical work is tied into all home addition costs, but how extensive these services are needed can inflate the cost. The basic electrical code covers the minimum requirements for outlets and lighting, but once the home addition becomes larger, the electricity bill will reflect this. Certain rooms require more electrical work than others. For instance, if you plan to install a home theater, the electrical work required for this project will affect the cost. 

As for plumbing, it is not always necessary for each home addition project. Professionals do this work, and the cost of plumbing is entirely dependent on the type of home addition being performed. If a bathroom is not part of your home addition, but a bedroom is, you will not need to worry about plumbing costs. 

Explore Your Options with BetterBuilt Builders

At BetterBuilt Builders, we have been operating for 15+ years in the Greater San Jose, CA area. Our years of experience have prepared us for any home remodeling project. Contact us at (408) 752-1069 or get a free estimate today. Choose BetterBuilt Builders.