Home additions in Sun Valley, CA, can range significantly in cost depending on the type of addition, the size, and the quality of materials used. The average cost of a room addition in California ranges between $100 and $400+ per square foot. Initial estimates often fall between $80 and $200 per square foot for basic build-out, while more complex additions, including structural changes and specialized finishes, can reach $300 and $500 per square foot or higher. A 20x20 room addition can cost anywhere from $50,000 to $100,000, with costs averaging $125 to $250 per square foot. A 20x20 master suite addition in California could range from $60,000 to $500,000 or more. Let's delve deeper into the cost breakdown, considering various factors.
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