How much does a basement remodel cost with Lamont Bros.?

Basement remodels with Lamont Bros. fall into three cost tiers based on how much structural work is needed: refinishing an existing basement starts around $100,000, a partial excavation with new rooms and egress is around $325,000, and a full excavation with a house lift is $450,000 or more.

The Lamont Bros. basement cost calculator shows the three tiers:

• Refinish existing space: around $100,000, or about $150 per square foot
• Partial excavation: around $325,000, or about $270 per square foot
• Full excavation with a house lift: $450,000 or more, or about $400+ per square foot

Foundation and access work drive the price far more than finish level. A legal bedroom needs an egress window, about $5,000 each, and legal living space in Oregon needs at least 6 feet 8 inches of ceiling height. Lamont Bros. recommends a 10 to 15 percent contingency for surprises in older Portland homes. Try the basement cost calculator for an estimate based on your project.