Costs for a Bump-Out Addition to a Home

What Is a Bump-Out Addition?

Suggested Uses of a Bump-Out Addition

• Kitchen: You can use a bump-out addition to extend the kitchen counter, add space for an appliance, install an island, incorporate a breakfast nook or dining area, or add a cooking area.
• Bedroom: A bump-out addition could accommodate a window seat, build out an existing bedroom suite, or add a bathroom or walk-in closet to a suite.
• Bathroom: An addition could include adding a bathtub or new shower to an existing space or separating your bathtub from your shower.
• Living space: You can make more space in a smaller room for another living space, such as a TV room, home office, playroom, or living room. 

Costs of Building a Bump-Out

• 20 square feet: $1,700 to $4,200
• 30 square feet: $2,500 to $6,300
• 40 square feet: $3,400 to $8,400
• 90 square feet: $7,650 to $18,900

Factors That Impact Bump-Out Costs

• Flooring: The type of flooring you choose may affect your costs. For example, if you choose natural stone, exotic hardwoods, or high-end designer carpeting, you will pay more than simple laminate flooring. You can expect to pay between $1,500 and $4,500, with an average of $3,000, to cover 500 square feet.
• Decoration: It costs about $1.50 to $3.50 per square foot to paint an interior wall, and hiring a professional painter will cost more, about $2 to $6 per square foot. Beyond that, you may want to add furniture, wall art, and decor, which will make up the bulk of your costs. 
• Windows: The average cost of windows runs between $3,500 and $15,000. Of course, the cost depends on the brand, size, material, type, and style.
• Electrical work: A simple electric wiring project can cost about $500, plus labor and permits, depending on the scope of the project and the wiring accessibility.
• Interior design: Interior designers typically charge between $50 and $500 per hour, depending on their experience level. You may pay around $5,200 in design fees, which doesn't include the cost of furniture and decor.
• Siding: You'll also need to add siding, soffit, and fascia to match the original exterior of your house. New siding costs between $2 and $9 per square foot and up to $50 for materials like brick and stone. It might be hard to match the original vinyl siding or stone, so consider using a different material altogether.
• Roofing: You may need to extend or cover the roof of your bump-out, and the typical cost runs about $50 to $85 per foot.

How Big Can You Make a Bump-Out?

Financing a Bump-Out Addition

• Home equity loan or second mortgage: You can tap into your home's equity with a home equity loan, also called a second mortgage. Your equity is the amount of home that you own — not the part you still owe to the bank. Your home equity lender gives you money in a lump sum and you repay it in installments with a fixed interest rate. A home equity loan uses your home as collateral, meaning the lender can foreclose on your property if you stop repaying your loan.
• Credit cards: Credit cards can also finance a bump-out addition. By paying with a credit card, you may earn rewards, cash back, points, or miles on the cost of your bump-out addition. Some credit cards offer a 0% introductory annual percentage rate (APR), the yearly interest you'll pay to use the card. Evaluate the best credit cards so you avoid getting stuck with high-interest credit card debt later on.
• Home equity line of credit (HELOC): A HELOC, another type of second mortgage, allows you to continue borrowing against your home equity. HELOCs work similarly to credit cards, where you draw on the money, pay it back, and can then draw on it again. Like a home equity loan, a HELOC uses your home as collateral.
• Personal loan: Personal loans for home improvement can also help you finance your bump-out addition. Your lender will give you the money in a lump sum, and once you use it for your bump-out, you repay the loan with interest in monthly installments. You must qualify for a personal loan with certain credentials, such as your credit score and income. A personal loan does not require you to put your home up as collateral.

The Takeaway