Brick Wall Calculator
Planning a brick wall project? Enter the length and height to see how many bricks and bags of mortar you need, plus a cost estimate.
Single-Wythe vs. Double-Wythe Construction
A single-wythe brick wall consists of one layer of bricks. It's common for veneers over wood or steel framing, where the brick is non-structural and simply provides weather protection and aesthetics. Single-wythe walls are tied to the backing with metal anchors spaced 16 inches on center. They're lighter, faster to build, and use half the brick of a double-wythe wall.
Double-wythe walls use two layers of brick with headers or metal ties bonding the wythes together. This creates a structural wall capable of supporting roof loads and lateral wind or soil pressure. Double-wythe construction is traditional for freestanding garden walls, boundary walls, and older load-bearing buildings. The air gap between wythes can be filled with insulation or grouted solid for maximum strength.
Cost and time roughly double for double-wythe walls. You need twice the brick and mortar, plus the labor to lay two faces and coordinate headers. The payoff is a wall that's stronger, more durable, and better insulated. If you're building a retaining wall or a freestanding wall taller than 4 feet, double-wythe construction is the safer, longer-lasting choice.
Footings and Foundation Requirements
Every brick wall starts with a solid footing. The footing spreads the wall's weight over a larger area, preventing settling and cracking. As a rule of thumb, the footing should be twice the wall thickness and at least 8 inches deep. For a 4-inch single-wythe wall, that means an 8-inch-wide by 8-inch-deep footing. An 8-inch double-wythe wall needs a 16-inch-wide footing.
Footing depth must reach below the frost line to prevent heaving. In cold climates, frost penetrates 4 feet or deeper, so footings must go down that far. Check local building codes for the required depth in your area. Shallow footings in freeze zones will lift, crack the wall, and destroy your work within a single winter.
Pour footings on undisturbed soil or a compacted gravel base. Loose fill settles unpredictably and causes differential movement. Add rebar—typically two continuous runs of #4 bar—in the footing to resist cracking from soil expansion and contraction. For retaining walls, include vertical dowels projecting up into the wall core to tie the wall to the footing and resist overturning.
Material Costs and Budgeting
Brick prices vary widely. Basic red common brick costs $0.30-$0.50 per unit. Mid-range face brick runs $0.50-$1.00 per brick. Premium handmade or imported brick can reach $2-$5 per brick. For a 100-square-foot wall, that's a material cost swing from $200 to over $3000 just for the brick.
Mortar is cheap by comparison. An 80-pound bag costs $8-$12 and covers about 2 cubic feet of joints. A typical wall uses one bag per 30-40 bricks, adding roughly $0.20-$0.30 per brick in mortar cost. Sand, lime, and portland cement are even cheaper if you mix your own, but the labor savings of pre-mixed bags usually outweigh the cost difference for small projects.
Labor is the big variable. DIY projects eliminate labor costs but take longer and risk mistakes. Professional masons charge $10-$25 per square foot of wall face depending on region, wall complexity, and job size. A simple 100-square-foot single-wythe wall might cost $1000-$2500 installed. Complex bond patterns, arches, or double-wythe construction push costs higher. Always get multiple quotes and check references before hiring.
Frequently Asked Questions
How thick should a brick wall be?
A single-wythe (one brick thick) wall is 4 inches and works for non-structural veneers and garden walls up to 4 feet high. Double-wythe (two bricks thick) walls are 8 inches and suitable for structural walls, retaining walls, and freestanding walls above 4 feet.
Do I need rebar in a brick wall?
Freestanding walls over 3 feet high and retaining walls of any height should have rebar in the footing and vertical bars grouted into cores or joints. Check local codes—many jurisdictions require engineered reinforcement for walls over 4 feet.
What is the cost per square foot for a brick wall?
DIY material costs run $3-$6 per square foot depending on brick type. Installed costs range from $15-$40 per square foot, with regional variation, wall height, and complexity affecting the price.
Can I build a brick wall without a footing?
No. All masonry walls need a continuous footing to prevent settling, cracking, and collapse. The footing must sit below the frost line, be at least twice the wall width, and rest on undisturbed soil or compacted fill.
How long does it take to build a brick wall?
An experienced mason can lay 300-500 bricks per day on simple walls. Complex patterns, stepped footings, and arches slow production. DIYers average 100-200 bricks per day as they learn technique and pacing.