How Much Does It Cost to Add a Room to a House?
A room addition costs $25,000 to $150,000, or roughly $150 to $350 per square foot for a ground-level build. A simple 200 sq ft bedroom lands near $30,000 to $5
Cost Guides
How Much Does a Modular Home Addition Cost in 2026?
A modular home addition is built in sections at a factory, then trucked to your home and craned into place on a prepared foundation. In 2026, modular additions
Cost Guides
Bump Out Addition vs Full Room Addition Cost Guide
A bump-out addition pushes an existing room out by as little as 2 feet or as much as 10 to 15 feet, adding targeted square footage without the cost of a full ro
Cost Guides
How Much Does a 400 Sq Ft Master Suite Addition Cost in 2026?
A 400 sq ft master suite addition costs $90,000 to $200,000, with most projects landing between $120,000 and $170,000. That works out to roughly $225 to $500 pe
Cost Guides
How Much Does a Dormer Addition Cost in 2026?
A dormer addition projects out from a sloped roof to add headroom, light, and usable floor space to an attic or top floor, often turning unusable space into a r
Cost Guides
How Much Does a Mudroom Addition Cost in 2026?
A mudroom addition creates a hardworking transition space, a place to drop coats, shoes, bags, and wet gear before they reach the rest of the house. In 2026, mu
Cost Guides
How Much Does a 20x20 Room Addition Cost?
A 20x20 room addition gives you 400 square feet of new living space, enough for a generous family room, a large bedroom, a home office, or a full master suite.
Cost Guides
How Much Does a Second Story Addition Cost in 2026?
Adding a second story is one of the most dramatic ways to expand your home's living space. Rather than expanding outward on your lot, you're building up, which
Cost Guides
How Much Does a Home Office Addition Cost in 2026?
The COVID-19 pandemic permanently transformed how Americans work, with hybrid and remote work now standard across many industries. One in three workers now spen