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Home Addition Costs

When you purchase a home, you’ll likely have a vision that differs from that of the original homeowners—and that’s where home additions come in handy. Whether you’re interested in adding an in-law apartment to give guests and family members a place to call their own, a bathroom to serve the needs of a growing family, or an indoor pool for your kids, we have all the cost info you need to get started.

Bathroom Addition

If you have an existing space that needs to be converted into a bathroom, expect to pay between $7,500 and $50,000, depending on the work that needs to be done and the materials used in its construction. For an entirely new structure, it can cost anywhere from $25,000 to $80,000.

Bedroom Addition

bedroom addition

On average, a 10x15 bedroom can cost anywhere from $7,500 to $22,500, depending on the complexity of the layout. Expect to pay more for a master suite.

Laundry Room Addition

Laundry rooms are tricky to price, depending on whether the addition is new construction or a renovation of existing space. If you’re building a laundry room from scratch (attaching it to the garage or kitchen, for example), your costs range from $5,000 to $7,000 or more. New appliances or shelving systems will cost more as well.

Living Room Addition

living room addition costs

The cost of converting an existing space into a living room can be as little as $7,500 or as much as $25,000, depending on the size and the amount of work that needs to be done. Adding new space to a home can be $10,000-$20,000 for 400 square feet.

Home Office Addition

Costs of adding a home office can vary greatly by the type of equipment that you want to put in the space. Get price quotes for more information.

Sunroom Addition

sunroom addition cost

When it comes to adding a sunroom, expect to pay $5,000-$15,000 for a two season room, and anywhere from $15,000-$35,000 for a prefabricated 8x10 room with glass walls. Adding extras can make the cost jump to upwards of $70,000.

In-Law Apartment Addition

The cost of adding an in-law apartment can vary greatly in price, depending on the size and scope of the project, the type of materials used, where the addition is located, the complexity of the layout, the amount of plumbing and electrical work that needs to be completed, and more. It’s highly recommended that you get estimates for an addition so broad in price range.

Indoor Swimming Pool Addition

swimming pool addition

While an indoor swimming pool can be bought for as little as $10,000, you also need to factor in other costs, like any structures that must be built around the pool, heating, cleaning and filter systems, maintenance, etc.



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