How much does it cost to lay a patio if I supply the slabs?

Splitting supply from labour can trim a patio budget, but it changes who carries the risk. Knowing exactly what a labour-only price covers — and what it does not — avoids awkward gaps when the work starts.

What a labour-only price covers

When you supply the slabs, the installer still does most of the work and provides most of the other materials. A labour-only (or labour-plus-groundworks) price typically includes:

• Excavation and disposal: digging out the area and removing the spoil.
• Sub-base: supplying and compacting the crushed-stone base — usually still the installer's material, not yours.
• Mortar bed: the sand, cement and any priming slurry to bed the slabs on a full mortar bed.
• Laying: setting the slabs to line, level and falls, cutting around edges and obstacles.
• Jointing: pointing or brush-in jointing between the slabs.

So even on a labour-only deal, you are buying more than just time — the groundwork materials are normally part of the price. The slabs are the one element you have taken on, which is why the saving comes from avoiding the installer's markup on the paving rather than the whole job.

Indicative labour-only figures

The figures below are indicative UK guidance for the labour and groundworks element when you supply the slabs. The slabs themselves are extra and bought by you.

Supplying your own slabs can save on the material mark-up, but it shifts responsibility for quantities, breakages and matching onto you. If you under-order, the work can stall while more are sourced, and a later batch may not colour-match; if you over-order, you carry the surplus. Many contractors prefer to supply the slabs so they control the spec and carry the risk, so it is worth confirming up front whether a labour-only arrangement is welcome and who is responsible if slabs arrive damaged or short.

The groundworks are where most of the labour cost sits when you supply the slabs. Excavation, spoil disposal, a compacted sub-base, a full mortar bed and the correct falls for drainage all take time regardless of who bought the paving. A quote that looks cheap on labour may be assuming a thin sub-base or dabs of mortar instead of a full bed, so it is worth confirming the build-up rather than just the rate.

Indicative UK figures for guidance only; agree the split in writing.

The pitfalls of supplying your own slabs

Buying your own slabs can save the installer's markup, but it transfers risk to you. The common pitfalls are worth weighing before you decide:

• Quantity errors: if you under-order, the job stalls while you wait for more, and a second delivery may be a different batch with slightly different colour. Always order extra for cuts and breakages.
• Quality and breakage: if slabs arrive damaged or vary in thickness, sorting it out is your responsibility, not the installer's. Natural stone in particular varies between batches.
• Guarantee gaps: when the installer supplies and lays, they stand behind the whole job. If you supply materials and a problem later relates to the slabs, responsibility can become blurred between you, the installer and the merchant.
• Wrong specification: choosing slabs that are too thin, unsuitable for the use, or hard to lay can add labour or cause problems the installer warned against.

Many installers prefer to supply the slabs precisely so they control quality, batching and breakage, and can guarantee the result cleanly. If you do supply your own, take advice on quantity and specification first, order a sensible surplus, and agree in writing who is responsible if there is a shortfall or a defect. The saving is real but only worthwhile if these risks are managed.

How to make a supply-your-own arrangement work

Supplying your own slabs can save money, but only if the arrangement is set up carefully so that responsibilities are clear and the materials are right. A few steps make the difference between a smooth job and an awkward one:

• Agree the specification with the installer first: before you order anything, have the installer confirm the slab type, thickness and finish that suit the job. Buying first and asking later risks slabs that are too thin or unsuitable.
• Calculate the quantity together: let the installer help work out the area plus a sensible allowance for cuts and breakages. Under-ordering stalls the job; a later top-up may be a mismatched batch.
• Order a single batch where possible: natural stone in particular varies between batches in colour and thickness, so ordering everything at once avoids a visible mismatch across the patio.
• Inspect on delivery: check the slabs for damage and consistency when they arrive, while you can still raise it with the merchant, rather than discovering problems mid-lay.
• Put the split in writing: agree in writing exactly which materials each party supplies, who covers a shortfall, and how a slab defect versus a laying defect will be handled. This is the single strongest protection against disputes.

Handled this way, supplying your own slabs is a legitimate way to trim a budget, and some homeowners enjoy choosing the exact stone themselves. The risk only bites when the arrangement is vague — slabs ordered without advice, no spares, no clarity on who is responsible. Because a split-supply job blurs the usual single point of accountability, the time spent agreeing the details upfront is what keeps the saving real and the job running smoothly. If you are not confident managing materials, a supply-and-lay quote where the installer takes that responsibility may be worth the modest markup for the simplicity and clean guarantee it brings.

Frequently asked questions

Sources & further reading

• Checkatrade — Patio laying cost
• MyJobQuote — Patio cost guide
• HomeOwners Alliance — Hiring a tradesperson

Figures on this page are typical UK ranges drawn from published sources and depend on your specific site. They are guidance, not a quotation.