450x450 concrete paving slabs cost about R50 to R125 each in 2026 and cover one square metre with five slabs. That works out to roughly R250 to R625 per m² supplied, before delivery and before anyone lays them.
It is the most forgiving square format on the market, and for a garden path it is usually the right call.
What 450x450 concrete paving slabs cost right now
Prices vary by finish and by whether delivery is baked in. Published 2026 figures from South African suppliers land like this.
- Smooth grey, collected: from about R50 a slab, roughly R250 per m²
- Sandstone and tan tints: around R59 to R80 a slab
- Charcoal and coloured, delivered: around R119 to R125 a slab, roughly R595 to R625 per m²
- Rockface and textured on promotion: around R320 per m², marked down from R370
Watch the word delivered. Some yards price the slab low and charge transport separately, others quote a landed price that already includes getting it to Cape Town. Compare the per-square-metre landed figure, never the shelf price.
The coverage maths
A 450 x 450mm slab covers 0.2025m². Five slabs cover one square metre with a small joint allowance.
- Measure length by width in metres for your area
- Multiply by five to get the slab count
- Add 7 to 10 percent for a straight running layout
- Add 10 to 15 percent if you have curves, angles or many cuts
- Round up to a full pallet if the yard sells that way
A 3m by 4m patio is 12m², so 60 slabs plus waste, call it 66. At R80 a slab that is about R5,280 in materials alone.
Why 450×450 suits a garden path
At roughly 23kg a slab, one person can carry and place them. That matters more than it sounds on a narrow path where a wheelbarrow cannot reach.
- Path width: two slabs side by side gives a comfortable 900mm walkway
- Stepping stones: single slabs at 600mm centres suit a normal stride
- Curves: smaller slabs follow a bend with fewer awkward cuts
- Repairs: a stained or cracked slab lifts out and swaps for a new one
For a larger open patio the bigger format covers faster, and the trade-off is set out in our 500×500 concrete pavers price guide. For anything carrying a car, neither format applies.
Laying 450×450 slabs so they stay flat
Most slab failures are bed failures. The slab is rarely the problem.
- Excavate roughly 150mm below the finished level for a pedestrian area
- Compact the natural ground before anything goes on top of it
- Lay a compacted sub-base layer, wetted and rolled in lifts
- Screed 25 to 30mm of bedding sand or crusher dust dead flat
- Set a fall of about 1 in 60 away from walls and doors
- Bed each slab and tap it down, checking level as you go
- Fill joints and fit an edge restraint around the perimeter
Skipping the edge restraint is the quiet killer. Without it the outer slabs creep outward over a season or two, the joints open, and the whole field starts to wander. Proper paving always finishes with a restrained edge.
Falls and drainage in a wet Cape winter
Water must have somewhere to go. Aim the fall away from the house and towards a bed, a drain or open ground.
- Never fall towards a wall — that is how damp starts
- Keep the finished level below the damp-proof course
- Leave a small gap at planted edges so water can soak away
Sealing: worth it or not
Concrete is porous. Sealing does not make slabs stronger, it makes them easier to clean and slows staining.
- Worth sealing: pool surrounds, braai areas, anywhere oil or wine lands
- Usually not worth it: a plain back garden path nobody eats on
- Timing: wait until the slabs are fully dry and any efflorescence has weathered off
- Upkeep: most sealers need reapplication every few years
A sealed slab can be slippery when wet. On a pool surround choose a textured or non-slip finish first and treat sealing as secondary. Paver strength classes and laying guidance come from the Concrete Manufacturers Association.
Budgeting the whole job
Installed concrete paving in Cape Town generally runs R330 to R495 per m², inside a wider all-in band of about R390 to R680 per m² across all materials. Labour on a prepared base is R100 to R200 per m², and R200 to R370 per m² once excavation, base and edging are in the price.
If your budget is tight, read our honest look at cheap paving bricks before you buy on price alone. When you know your area and the slab you want, send us the measurements for a written quote. The assessment is free and there is no call-out fee.
Frequently asked questions
How many 450×450 slabs are in a square metre?
Five. A 450 x 450mm slab covers 0.2025m², and five cover a square metre once a small joint allowance is included. Add 7 to 10 percent waste for a straight layout and 10 to 15 percent where there are curves, angles or a lot of cutting at the edges.
How much does a 450×450 paving slab cost?
About R50 to R125 each in 2026. Smooth grey collected from a yard starts near R50, sandstone and tan sit around R59 to R80, and charcoal or coloured slabs quoted with delivery included run R119 to R125. That is roughly R250 to R625 per square metre supplied.
What are 450×450 concrete pavers called?
Usually paving slabs, precast paving slabs or flags, and manufacturers often use a product code such as PSC18 for the 450 x 450 x 50mm size. They are distinct from paving bricks or interlockers, which are small units around 200 x 100mm used for driveways.
Do paving slabs need to be sealed?
Not structurally. Sealing makes concrete easier to clean and slows staining, so it is worth doing on pool surrounds and braai areas where oil, food or wine lands. A plain garden path rarely justifies it. Wait until the slabs are fully dry, and remember a sealed surface can be slippery when wet.
What goes under 450×450 paving slabs?
A compacted sub-base, then 25 to 30mm of screeded bedding sand or crusher dust. Excavate roughly 150mm for a pedestrian area, compact the natural ground first, build the base up in layers rather than one deep dump, set a fall of about 1 in 60 away from the house, and finish with an edge restraint.