Muckaway and Soil Disposal Cost in London
A grab lorry load of soil in London typically runs £280–£420, with inert disposal at roughly £28–£45 per tonne — London and the South East at the top of that range. But the figure that catches builders out isn't the disposal rate. It's the volume. Excavated clay swells around 25% the moment it leaves the ground, and builders who order muckaway off their excavation drawings routinely under-order and pay for a second call-out. Here's how muckaway is priced, why grab lorries beat skips for heavy inert material, and the swell factor calculation that saves money before you pick up the phone.
A typical extension dig — clay spoil that swells around 25% the moment it leaves the ground.
Instant Estimate
Snap your rubbish, get a price in seconds
Free ballpark, no account. Real bids from EA-licensed carriers once you post the job. Open full calculator →
Snap your rubbish,
get a price in seconds
Free ballpark, no account. Real quotes from licensed carriers once you post the job.
Why soil is priced differently to everything else
Most builders waste — timber, plasterboard, mixed renovation debris — goes into a skip or a van and gets charged by volume or load size. Soil is different on every axis.
Charged by weight, not volume
A compact pile of wet London clay can outweigh a far larger heap of timber offcuts. Muckaway is priced per tonne or per load, where the load tonnage is fixed by the lorry's rated payload — not how full it looks.
Moisture content shifts the cost
Clay-heavy soil dug in January after a wet autumn weighs significantly more than the same dig in July. Same excavation volume on the drawing, materially different cost on the invoice.
Inert or contaminated is the biggest single lever
Clean subsoil, clay, chalk, concrete and hardcore go to inert disposal at roughly £28–£45 per tonne. Contaminated material — hydrocarbons, asbestos, brownfield made ground — requires specialist handling and testing at considerably higher cost. That distinction is covered in its own section below.
This is the same weight-versus-volume logic that drives the difference between single-material and mixed-load pricing — covered in full in how single-material and mixed loads are priced.
The swell factor — why you need more lorries than you think
This is the calculation that catches builders out most often, and it's almost never in the brochure.
Soil in the ground is compacted. Dig it out and it bulks up. Clay swells around 25% on excavation — so 4 m³ in the ground becomes roughly 5 m³ once dug out. Sandy or granular soils bulk less; clay bulks most.
| Soil type | Swell on excavation | Bulked volume example | In a 10-tonne grab |
|---|---|---|---|
| Clay | ~25% | 4 m³ in ground → ~5 m³ loose | ~6 m³ per 10-tonne grab |
| Sandy / granular soil | Less (~10–15%) | 4 m³ in ground → ~4.5 m³ loose | ~7 m³ per 10-tonne grab |
That matters because grab lorries are rated by payload, not bucket volume. A 10-tonne grab carries approximately 6 m³ of bulked clay — or around 7 m³ of sandy soil. Order a single grab for 6 m³ of clay and you will have clay left on site.
Worked example. A 5 m × 4 m extension dig to 900 mm depth gives roughly 18 m³ of in-ground volume. Apply the 25% clay swell: 22.5 m³ bulked. An 8-wheeler carries 16–18 tonnes — roughly 9–10 m³ of bulked clay per load. That is three grab loads, not two. Order off the excavation drawing and you are calling for a third visit.
The rule
Order muckaway off bulked volume, not excavated volume. Apply a 25% uplift to clay-heavy sites before booking. If you're not sure what you've got, assume clay and uplift — you can always cancel a lorry you don't need.
Grab lorry hire cost in London
Grab lorry prices cover collection, grab-arm loading, transport, tipping and licensed disposal in a single figure. There is no separate skip delivery charge, no highway permit, and no manual loading.
| Lorry | Capacity | Typical UK price/load | London (inert soil) |
|---|---|---|---|
| 4-wheel | 7–9 tonnes | £170–£380 | From ~£280 inert / ~£320 mixed |
| 6-wheel | 12–14 tonnes | £190–£400 | From ~£295 inert / ~£330 mixed |
| 8-wheel | 16–18 tonnes | £260–£420 | From ~£320 inert / ~£380 mixed |
Market averages, mid-2026, London-weighted. Most contractors outside London pay £200–£300 per load nationally; London sits at the top of that range.
London's premium over national rates reflects congestion charges, restricted access windows, higher gate fees at in-London transfer stations, and the general cost of operating in a dense city. Mixed construction waste is priced higher than clean inert soil because contamination risks push it toward more expensive processing.
Access matters
The grab arm reaches roughly 8–12 metres from the lorry, but needs a clear line over kerbside — no overhead cables, branches, or overhanging scaffold. Waiting time is typically charged from 30 minutes. Anything that prevents the driver loading in a single sweep adds cost. Talk to the carrier about access before booking, not after.
Grab lorry vs skip for soil — the maths
Most groundworkers know grab lorries exist. What's less obvious is how quickly the numbers diverge once the waste is heavy and inert.
The skip problem. A skip looks large. But a skip safely holds only around 5–6 tonnes of heavy inert waste before it hits its payload limit — however much empty space remains at the top. A 40-tonne wagon carrying three skips will refuse to collect if the contents are overweight. You are paying for a container of air you are not allowed to fill.
Head-to-head: 12 tonnes of soil and rubble
| Item | Skip route | Grab route |
|---|---|---|
| What you need | 2 × 8-yard skips | 1 × 6-wheeler grab |
| Price | ~£500 | ~£295 |
| Road permit | ~£30–£90/week if on the highway | None |
| Loading | By hand, by you | Grab arm, ~20 minutes |
A single grab load can replace three or four skip exchanges on a heavy inert job — and the grab arm does the loading in roughly 20 minutes. No wheeling barrows, no permit application, no waiting for a skip wagon to return.
When a skip still wins
- You're filling it gradually over several days — a skip parked on site lets you tip as you go
- No kerbside access for a grab arm (overhead cables, restricted yard, scaffold)
- The waste is genuinely light and mixed rather than heavy and inert
For the domestic equivalent of this decision, see the household skip versus man and van comparison.
Inert or contaminated? The biggest cost lever
The single biggest price swing in muckaway is soil classification, and it's non-negotiable.
- Subsoil, clay, chalk
- Concrete, brick, hardcore
- Clean sand and gravel
~£28–£45 per tonne
London / South East at the upper end. Around 90%+ recycled — crushed into 6F2 sub-base and Type 1 capping for reuse in construction.
- Hydrocarbons (fuel, oil)
- Asbestos fibres
- Brownfield made ground
Substantially more
Specialist testing and handling required. Declare it before booking — a carrier who discovers contamination on site cannot legally load the inert wagon.
Keep your load clean
Every piece of plasterboard, timber or plastic in a soil load has to be hand-picked off a conveyor at the transfer station. That reclassifies the consignment and pushes it toward mixed construction rates. Keep soil loads clean from the start.
Landfill tax on active waste runs at £103.70 per tonne — which is why licensed carriers prioritise inert recycling wherever possible. For the full breakdown of EWC codes, waste classification, and WTN obligations, see the full construction waste guide.
Can't I just take it to the tip?
It depends on who produced the spoil.
Contractor-produced spoil
If a contractor was paid for the dig, the spoil is commercial waste under EPA 1990 s34. Household Waste Recycling Centres (HWRCs) do not accept commercial waste — attendants will turn the van away. The contractor holds the duty of care, not the householder.
Genuine DIY soil from your own garden is allowed at HWRCs, but within limits that vary by waste authority — check yours before loading the car:
Vans need a permit at most sites. What Richmond's tip charges for DIY waste gives a live local example of how permit and charge rules work in practice.
A few bags of garden soil is a tip job. An extension dig is not.
The paperwork you actually need
Under s34 of the Environmental Protection Act 1990, anyone who produces, carries or disposes of controlled waste has a legal duty of care. That duty sits with the producer — the builder — not just the carrier.
Use EA-licensed carriers
Check any carrier against the EA public register before you book. If your muckaway is fly-tipped by an unlicensed operator, you can be held jointly liable.
Waste Transfer Note (WTN)
A WTN must be completed for every load. Keep it for two years. If the soil is contaminated, a Hazardous Waste Consignment Note applies instead. Failure to produce a WTN on request can result in a fine up to £5,000.
RubbishBids connects you with EA-licensed carriers who are legally obliged to dispose of waste responsibly and provide a Waste Transfer Note on every job. For the full WTN explainer, see the full construction waste guide. For what happens when unlicensed carriers are used, see the fly-tipping fine that lands on you.
Frequently asked questions
How much does muckaway cost in London?
A grab lorry load of soil in London typically costs £280–£420 per load, with inert disposal running £28–£45 per tonne. London sits at the top of the national range due to higher gate fees, congestion charges, and restricted access. Price includes collection, grab-arm loading, transport, tipping, and licensed disposal.
How many tonnes does a grab lorry carry?
A 4-wheel grab lorry carries 7–9 tonnes. A 6-wheel carries 12–14 tonnes. An 8-wheel carries 16–18 tonnes. Grab lorries are rated by payload weight, not by volume — how many loads you need depends on your bulked (loose) soil volume, not the in-ground excavation volume.
Why do I need more lorries than my dig volume suggests?
Because of the swell factor. Soil in the ground is compacted. When you excavate it, clay swells around 25% — so 4 m³ in the ground becomes roughly 5 m³ once dug out. Builders who order muckaway off their excavation drawings routinely under-order. Apply a 25% uplift for clay-heavy sites before booking.
Is a grab lorry cheaper than skips for soil removal?
For heavy inert volumes, usually yes. A skip safely holds only around 5–6 tonnes of heavy inert waste — regardless of how big the skip looks. For 12 tonnes of soil and rubble, two 8-yard skips cost around £500 plus a road permit, versus one 6-wheeler grab at around £295 with no permit and no manual loading. A skip wins when you're filling gradually over several days or have no kerbside access for a grab arm.
Can I take building soil to the tip?
Not if a contractor produced it. Under the Environmental Protection Act 1990 s34, spoil from a paid contractor is commercial waste — Household Waste Recycling Centres will refuse it. Genuine DIY soil is allowed within limits that vary by waste authority (e.g. NLWA: two 50-litre bags per visit; WLWA and SLWP: approximately £23 per 100kg above the free allowance). Vans need a permit at most sites.
Ready to move your muck?
Compare muckaway prices from EA-licensed carriers
Post the job with your bulked volume and soil type. Compare bids from EA-licensed carriers and choose the one you want. Only the carrier you select gets your contact details — no site phone ringing with ten different firms.