How Much Does It Cost to Add a Bedroom? (2026)

Q: How Much Does It Cost to Add a Bedroom?

Adding a bedroom costs about $10,000 to $60,000 in 2026. Converting existing space like a den, attic, or basement runs $10,000 to $25,000, while building a bedroom addition runs $25,000 to $60,000 or more. A legal bedroom needs an egress window and a closet.

How Much Does It Cost to Add a Bedroom?

Cheapest to most expensive

The cost depends on whether you convert or build:

Convert a den or finish basement space: $10,000 to $25,000
Finish an attic into a bedroom: $20,000 to $50,000
Build a bedroom addition: $25,000 to $60,000+

What makes a bedroom legal

To count and appraise as a bedroom, a room generally needs a closet, a minimum size, and an egress window or door for emergency escape. Adding an egress window to a basement or interior room is a common extra cost.

Frequently asked questions

Does adding a bedroom increase home value?

Yes. Bedroom count strongly affects how a home is valued and searched for, so adding a legal bedroom can raise both value and saleability, especially going from two to three or three to four.

How Much Does It Cost to Add a Bedroom?

Cheapest to most expensive

What makes a bedroom legal

Estimate it yourself

Frequently asked questions

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