Question: how much does it cost to build a indoor fireplace?
Answer: The average cost to build a fireplace is $2,415 with most homeowners spending $1,050 to $3,780 depending on if it's gas, wood-burning, or electric. A new fireplace unit costs $1,600 to $2,000 on average, while installation and finishing adds $2,100, or about 25% to 50% of total cost.