Two parallel brick walls, a poured footing, and a capstone or timber seat come together across a weekend to form a permanent garden feature that survives decades of weather. A well-built masonry bench outlasts most wood and metal alternatives by a wide margin, often serving a backyard for 20-plus years when drainage is correct and the right mortar is used.
Here’s how to build a brick garden bench from layout to finishing, including footing depth, mortar selection, and the mistakes that crack walls in the first winter.
Why a Brick Bench Belongs in Every Outdoor Space
A masonry bench does something almost no other backyard piece of furniture can: it disappears into the landscape while anchoring it. Two parallel brick walls topped with wood or stone settle into a garden, patio, or entryway as if they grew there, then quietly do their job for two decades or more.
Lifespan separates brick from its rivals. Wood benches rot at the joints where water sits. Metal benches corrode at the welds. Brick, by contrast, shrugs off rain, sun, and foot traffic, lasting 20-plus years when drainage keeps water moving away from the foundation. That longevity comes from the simplest ingredient list: brick, mortar, a concrete foundation, and patience.
Modularity is the second quiet advantage. The same plan that produces a two-seat nook against a fence also scales into a long curved retaining-wall bench beneath a tree, or a corner seat wrapping a patio. The shape changes; the technique does not.
Choosing a Layout: Straight, Angled, or Curved Designs
Layout choice drives almost every later decision, including brick count, footing length, and whether you will need to cut any units at all. Pick the silhouette before you buy materials.
Straight Runs and Corner Configurations
Straight walls are the friend of a first-time builder. They use unmodified bricks, uniform 3/8-inch mortar joints, and a string line that pulls taut from one end to the other. Most diy brick bench plans start here for good reason: every measurement is simpler and waste stays low.
An L-shaped or corner configuration adds seating around the edge of a patio, but the inside corner demands care. Measure the joint precisely where the two legs meet, and dry-fit the corner bricks before mixing mortar, because an off-square corner will telegraph up every course and worsen with each row.
For brick patio bench diy projects wrapping a fire pit or pergola, the corner is also where you’ll likely add the planter boxes that turn a seat into a true landscape feature.
Curved Walls and Arcs
Shifting into a curved layout instantly moves the project into a more complex building category. A gentle arc needs only slightly more brick than a straight run of the same length, but a tight curve requires angled cuts or special-shaped bricks to keep the bond true. Footings also widen under a curve to resist the lateral force that tries to push the arc outward.
A curved freestanding bench reads beautifully against a lawn, yet it costs more in both materials and time. If you’re choosing between layouts for a first build, a straight or gently angled wall will get you to a finished seat with far less frustration.
| Layout | Brick Skill Level | Cutting Required | Typical Brick Count |
|---|---|---|---|
| Straight wall | Beginner | None | 50–100 |
| L-shaped corner | Beginner–Intermediate | Minor | 80–130 |
| Curved arc | Intermediate–Advanced | Frequent | 100–150 |
Tools, Bricks, and Materials You Will Need
Gathering the right kit before mixing mortar saves an entire afternoon of mid-project trips to the store. A typical 4- to 6-foot bench uses 50 to 150 bricks depending on wall height and whether the seat is masonry or timber.
Core Masonry Kit
The basics have not changed in a century. A mason’s trowel, a level (4-foot for the courses, 2-foot for the tight spots), a string line, and a brick hammer cover nearly every beginner project. Add a margin trowel for mixing and a stiff brush for striking joints.
Type S mortar suits most outdoor brick bench seating in climates with mild freeze-thaw cycles. Type N works in warmer regions where the ground rarely freezes solid. Both are widely available at Home Depot, Lowe’s, and any Quikrete dealer; mixing in a wheelbarrow or 5-gallon bucket keeps cleanup easy.
Footing Materials and Reinforcement
Any bench taller than two courses should sit on a poured concrete footing at least 4 inches thick, with rebar laid in a grid for tensile strength. For a 6-foot bench, that footing runs the full length and width of both walls. This Old House and HGTV both show the same approach in their masonry segments: form, rebar, pour, cure.
Order 10 percent more brick than your count suggests. Breakage, cutting loss, and the occasional misaligned course will eat that surplus before you finish.
Preparing the Foundation and Footing
The footing is the single decision that determines whether your bench survives its first winter. Everything above it is detail; everything below it is structural.
Marking and Excavation
Begin with stakes and string, snapped tight to outline both wall footprints. Measure diagonally to confirm the layout is square, then excavate to the depth required by local code, which often means going below the frost line in cold regions. A footing that sits on frozen soil will heave, crack, and pull the bench apart within a season.
In warmer climates, a 6- to 8-inch excavation may be enough. In the upper Midwest, New England, or the Mountain West, plan for 12 to 36 inches depending on frost depth. Call 811 before you dig; irrigation lines and electrical conduits hide where you least expect them.
Forming, Pouring, and Curing
Build a simple wood form from 2x lumber, set a grid of #4 rebar on small chairs, and pour concrete to the planned bench footprint. Screed the top flat and let it firm up before finishing with a bull float.
Allow the footing to cure at least 24 hours before any brickwork begins, and 48 hours if temperatures are cool. Rushing this step is the most common cause of cracking in finished brick benches, because the wall’s weight lands on concrete that has not finished hydrating.
Laying the Brick Walls Course by Course
Once the footing has cured, the brickwork moves fast. Spread a 3/8-inch mortar bed on the footing, butter the head joints of each brick, and lay the first course with extra care, because every error here compounds upward.
Running Bond and Joint Pattern
Stagger the bricks in a running bond so vertical joints never line up between courses. This pattern locks each row into the ones above and below, distributing load across the wall instead of down a single seam.
Check level horizontally and plumb vertically every two or three bricks. Tap gently into place rather than shimming, because mortar wants to be compressed into a tight bond, not patched later.
Building Two Parallel Walls
Two walls set parallel to each other, spaced exactly the width of the seat, form the structural backbone of any freestanding bench. For a timber seat, that distance is typically 15 to 17 inches inside-to-inside; for a stone or capstone seat, the walls sit slightly farther apart to support the wider slab.
Keep both walls rising at the same rate, course by course, and tie them together at the top with the seat itself. Some plans call for steel anchors or rebar pins driven into the footing every few feet, which keeps the walls from kicking outward under load.
Crowning the Seat: Capstones, Wood Tops, and Final Finishing
The seat top transforms the wall into something you actually want to sit on. Aim for a finished seating height of 17 to 18 inches, the comfortable adult standard found in parks and on porches since the Victorian era.
Choosing Between Stone and Wood
Capstones or bluestone slabs give the bench a heavy, classical look and shrug off weather for decades. A treated 2x lumber seat, by contrast, adds warmth, costs less, and can be replaced in 10 years without touching the brick. Both approaches are correct; the choice is aesthetic.
Many DIYers build the bench from brick and wood together, gluing down a composite or hardwood seat on top of a masonry wall. That hybrid look suits modern patios and reads well next to a fire pit.
Curing and Sealing
Let the mortar cure 24 to 48 hours before seating anyone, longer if the weather is humid or cool. Once cured, seal porous caps with a breathable masonry sealer to prevent moisture staining and slow freeze-thaw damage at the surface.
Test the sealer on a single capstone before coating the whole bench. Some products darken the stone noticeably; others leave it nearly invisible.
Common Mistakes and How to Keep Your Bench Standing
Most brick bench failures trace back to three causes: a weak footing, the wrong mortar, or trapped water. Avoid those, and your bench will outlast its builder.
Footing Shortcuts
Skipping or skimping on the footing guarantees cracks within the first freeze-thaw cycle. A bench sitting on bare soil shifts with the ground, and any minor movement breaks the mortar bond between bricks.
Mortar Mix Errors
Using the wrong mortar type in cold or wet climates leads to crumbling joints within a season. Type N is too soft for freeze-thaw regions; Type S is the safer default anywhere the temperature drops below freezing. Pre-mixed bags from Quikrete remove the guesswork for beginners.
Drainage and Water Traps
Water pooling behind the wall or beneath the seat silently attacks mortar joints and accelerates structural failure. Leave small weep holes at the base of the back wall if the bench is built against a slope, and slope the seat top slightly toward the front so rain runs off rather than pooling.
Putting It Together
A brick bench rewards the builder who respects the footing, picks the right mortar, and lets every layer cure before stacking the next. Get those three things right and the seat will anchor your garden for the next two decades, weathering winters and hosting conversation long after the lumber alternative has rotted out.
FAQ
How do you build a DIY brick bench without mortar?
A mortarless brick bench relies on gravity and precise stacking, often using shaped bricks or a sand-and-gravel base. The technique works for low, decorative walls but is not recommended for any structure meant to support weight, because the joints will shift over time.
What type of brick is best for an outdoor bench?
Solid clay brick or concrete brick rated for below-grade use handles weather and load best. Avoid hollow cinder block for seat walls unless you fill the cores with grout, because the cavities collect water and crack from the inside.
How many bricks do I need to build a garden bench?
Most diy brick bench plans call for 50 to 150 bricks, depending on bench length and wall height. A 4-foot bench with two low walls uses roughly 60 bricks, while a 6-foot bench with taller walls and a curved footprint can reach 150.
Can you build a bench out of bricks and a wooden top?
Yes, and that hybrid is one of the most popular outdoor brick bench seating approaches. Two short brick walls act as supports for a treated 2x or composite lumber seat, combining masonry durability with the warmth and comfort of wood.
How long does it take to build a brick bench?
Plan for two to four weekends: one to dig and pour the footing, one to lay the brick once it has cured, and a final day for capstones, sealing, and cleanup. Add a few extra days if your design includes a curved wall or matching planter boxes.
Do brick benches need a foundation?
Any brick bench taller than two courses needs a poured concrete footing at least 4 inches thick for stability. Shorter decorative benches can sit on a leveled gravel pad, but free-standing seating that will hold people should always rest on cured concrete.
