Retiling the Floor. At the time of publication retiling a bathroom floor yourself can cost between $100 to more than $1,500. The cost of tiles range from $1 to up to $40 or more a square foot and tools and other material can cost you from $60 to more than $200.The average costs to hire a professional to retile a bathroom floor including materials and labor is about $10 to $40 a square foot.Removing existing tile can cost an additional $200 to more than $800 and repairing any damages underneath the old tiles can cost anywhere between $1,000 to more than $5,000.he average costs to hire a professional to retile a bathroom floor including materials and labor is about $10 to $40 a square foot. Removing existing tile can cost an additional $200 to more than $800 and repairing any damages underneath the old tiles can cost anywhere between $1,000 to more than $5,000.