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Cost of Materials. The cost of adding a new wall to a home depends on the material used. Brick walls are often an affordable option, and a hollow brick wall costs around $25.40 per square foot. Hollow bricks feature a unique design with a durable shell and a hollow space in the center of each brick. Traditional brick walls cost around $14.10 per square foot. If the wall reaches a certain height and requires additional reinforcement, most contractors will recommend the use of hollow brick walls. They can easily slide steel bars inside the bricks to reinforce the wall.
1 Do-it-yourself materials cost about $10-$15 a square face foot. 2  ThisOldHouse.com provides a video showing how to build a block wall, calling the project challenging and estimating it will take two people 8-10 hours for a low wall 10-16 feet long. Do-it-yourself materials cost about $10-$15 a square face foot. 2  ThisOldHouse.com provides a video showing how to build a block wall, calling the project challenging and estimating it will take two people 8-10 hours for a low wall 10-16 feet long.