Crazy paving — the laying of irregular broken stone, slate, or concrete pieces in a random, puzzle-like pattern — is one of the most cost-variable paving options available. Depending on the stone you choose and whether you use a contractor or lay it yourself, costs in 2026 range from around £60 to £120 per m² installed, with some premium natural stone installations running higher.
It is a style that has come in and out of fashion, but it remains a practical and affordable option for patios, paths, and informal garden areas. Because the pieces are offcuts, reclaimed material, or purpose-broken slabs, the supply cost is often significantly lower than for regular cut paving.
What is Crazy Paving?
Crazy paving uses irregularly shaped pieces — either naturally fractured stone (slate, limestone, sandstone) or broken concrete slabs — laid on a mortar bed with gaps filled by pointing mortar or, in dry-lay applications, by aggregate or fine sand. The random geometry is the defining characteristic; no two crazy paving installations look the same.
It is typically used for:
- Patios and seating areas
- Garden paths and stepping areas
- Informal driveways (concrete reconstituted only — natural stone can be slippery)
- Retaining wall capping
- Pool surrounds (with appropriate slip-resistant finish)
Stone Types and Supply Costs
The choice of stone has the largest single impact on supply cost. Natural stone is generally more expensive than reconstituted (manufactured) concrete products, but offers better aesthetics and typically a longer lifespan.
| Stone type | Supply cost (per m²) | Character | Durability |
|---|---|---|---|
| Reconstituted concrete (broken slab) | £8–£18 | Functional, neutral colours | Good for 20–30 years; can fade and develop moss |
| Natural sandstone (random pieces) | £18–£35 | Warm buff, honey, and grey tones | Excellent; typically 40+ years |
| Natural limestone (random pieces) | £22–£40 | Light grey to cream; fossil textures | Excellent; harder than sandstone |
| Natural slate (broken / riven) | £20–£38 | Dark grey, purple, green hues | Very good; can be slippery when wet |
| York stone (reclaimed random) | £30–£60 | Warm buff; heritage appearance | Excellent; highly durable |
| Indian sandstone (crazy pieces) | £15–£28 | Wide colour range; widely available | Very good when properly sealed |
Supply costs above are approximate 2026 figures for material only, including delivery to site for orders over 10m². Smaller orders typically attract a delivery surcharge of £40–£100. Reclaimed or salvage crazy paving can sometimes be sourced cheaply from reclamation yards (£5–£20/m²) but availability is inconsistent.
Installed Cost by Stone Type
The installed price includes materials, mortar/adhesive, pointing, and labour. It assumes a competent contractor laying to a prepared sub-base on a domestic patio or path project.
| Stone type | Installed cost (per m²) |
|---|---|
| Reconstituted concrete | £45–£70 |
| Indian sandstone (crazy) | £60–£90 |
| Natural sandstone / limestone | £75–£110 |
| Natural slate | £70–£100 |
| Reclaimed York stone | £90–£130 |
Complex patterns, tight cutting around obstacles (drain covers, steps, curved edges), or access difficulties will push costs towards and above the upper end of these ranges.
Mortar vs Dry-Lay
Mortar-laid (wet lay) is the standard method for patios and paths intended for regular foot traffic. Pieces are bedded onto a semi-dry mortar mix over a compacted sub-base, and the joints are pointed with a mortar mix once the bedding has set. This produces a stable, long-lasting surface. Mortar pointing typically uses a 3:1 sand:cement mix or a proprietary pointing compound.
Dry-lay (dry jointing) uses a compacted sub-base of MOT Type 1 hardcore topped with sharp sand, with the stone pieces laid directly into the sand bed. Joints are filled with kiln-dried sand or fine angular gravel. This method is faster and cheaper but less stable — pieces can shift over time, especially near edges. It is better suited to informal garden paths with low traffic than to main patio areas.
A brush-in pointing mortar (such as Rompox or similar trade products available from builders’ merchants) offers a middle ground: it is swept dry into joints and activates with light watering. These cost more per bag than standard pointing mortar but are faster to apply.
Labour Rates
Crazy paving is more labour-intensive than regular cut paving because every piece needs to be selected, orientated, and fitted to its neighbours. Experienced hard landscapers typically charge £200–£350 per day in the UK in 2026, with regional variation (London and South East rates tend to be £250–£400/day).
Typical outputs:
- An experienced landscaper can lay 5–8m² of crazy paving per day (compared to 10–15m²/day for regular cut paving)
- A 20m² patio typically takes 3–5 days to complete, including sub-base preparation and pointing
- Labour-only cost for a 20m² job: approximately £600–£1,750
Always ask for labour to be quoted separately from materials so you can compare like-for-like across multiple contractors.
Sub-Base and Groundworks
Crazy paving should be laid on a properly prepared sub-base to prevent settling and cracking. For patios and paths:
- Excavation: 150–200mm below finished level (to allow for 100mm compacted hardcore + 25–50mm mortar bed + stone thickness)
- Sub-base: 100mm of compacted MOT Type 1 hardcore
- Mortar bed: 25–50mm semi-dry mortar
- Stone: typically 25–40mm thick for natural stone, 40–50mm for concrete
Groundworks are often quoted as a day rate or per m² of excavation. Allow £10–£20/m² for excavation and sub-base preparation on a typical domestic project where mechanical plant is not needed. Where a mini-excavator is required (larger areas, hard ground), add £200–£350 per day for machine and operator hire.
Typical Project Costs
| Project | Size | Indicative cost |
|---|---|---|
| Small garden path (Indian sandstone) | 8m² | £500–£750 |
| Average patio (Indian sandstone) | 20m² | £1,200–£1,800 |
| Average patio (natural limestone) | 20m² | £1,500–£2,200 |
| Large patio (reclaimed York stone) | 40m² | £3,600–£5,200 |
| Informal drive (concrete reconstituted) | 30m² | £1,500–£2,200 |
Prices above include materials, sub-base, mortar, pointing, and labour. They do not include skip hire (typically £180–£350 for a 6-yard skip) or any drainage works.
Maintaining Crazy Paving
- Moss and algae: treat annually with a patio cleaner or diluted sodium hypochlorite solution; avoid pressure washing natural stone as it can erode pointing
- Pointing: mortar pointing may need refreshing every 10–15 years; repoint individual sections as cracks appear to prevent water ingress under the bed
- Sealing: natural sandstone and limestone benefit from a penetrating impregnating sealant applied every 3–5 years to resist staining and frost damage; apply after installation and after any cleaning
- Weeds: pointing mortar is the best defence; treat any breakthrough weeds promptly before roots establish under the stone
Crazy paving is a resilient and characterful surface option. Properly installed with a sound sub-base and good pointing, a natural stone crazy paved area should require minimal maintenance for 20–40 years.
