It depends on the size of your project. That is the honest answer most comparisons avoid giving. A bag of premixed concrete from a builders’ merchant costs around £7 to £10. Buying raw ingredients separately, cement, sand, and aggregate, brings that figure down to roughly £5 to £6 per bag equivalent. On paper, DIY mixing looks cheaper. In practice, the calculation changes significantly once equipment hire, labour time, waste, and quality risk enter the total.
Ready-mix consistently costs £170 to £370 less than DIY mixing on a typical two cubic metre project. That figure accounts for all associated expenses, not just materials.
What is Premixed Concrete?
Premixed concrete, often called ready-mix in the trade, is concrete batched to a specific grade before delivery to the site. Ingredients are combined under controlled conditions, either at a batching plant or inside a volumetric truck that mixes fresh on site to order. It arrives ready to pour, tested to British Standards, and graded to the exact specification the project requires.
Types of Premixed Concrete Available in the UK
Understanding the options available changes the cost calculation significantly. Each format suits a different project type and volume.
Ready-Mix Concrete (Factory Batched)
Batched at a central plant and delivered in a rotating drum lorry. It must be poured within 90 minutes of batching to maintain workability. Best suited to larger pours where the full load is used quickly.
Volumetric Mix-On-Site Concrete
Raw materials travel separately in a volumetric truck and are mixed fresh on site to the exact specification required. Payment covers only the volume actually poured. Unused materials return on the lorry, eliminating over-ordering. Particularly well-suited to domestic projects where the exact volume is difficult to predict in advance.
Bagged Premixed Concrete
Dry premixed bags available from builders’ merchants and DIY retailers. Add water and mix by hand or in a small hired mixer. Practical for very small volumes under 0.1 cubic metres. Cost per cubic metre is significantly higher than delivered concrete at any meaningful project scale.
Pro-Mix Concrete supplies concrete across London and the wider UK. Our volumetric mix-on-site concrete service is particularly popular for domestic projects. Customers pay only for the concrete actually poured rather than estimating quantities in advance.
What Does DIY Concrete Mixing Actually Cost?
DIY mixing appears cheaper on the surface. Material cost per bag of cement is lower than that of an equivalent bag of premixed product. Material cost is only one line in the full calculation, and it is rarely the largest one.
Material Costs for DIY Mixing
For a standard C20 mix suitable for most domestic applications:
- Cement: £5 to £8 per 25kg bag
- Sharp sand: £3 to £5 per 25kg bag
- Aggregate: £2 to £4 per 25kg bag
A cubic metre of concrete requires roughly 300kg of cement, 600kg of sand, and 1,000kg of aggregate. At current UK prices, raw materials for one cubic metre cost approximately £80 to £120.
Equipment Costs Most People Forget
- Cement mixer hire: £30 to £60 per day
- Wheelbarrow, shovel, and tamping equipment: £20 to £40 per day if not already owned.
- Protective gear: £15 to £30 for gloves, goggles, and waterproof boots
- Skip hire for waste and packaging: £150 to £250 for a small skip in most UK locations
The Labour Cost Nobody Accounts For
A cubic metre of concrete weighs approximately 2,400 kilograms. Mixing that volume in a small hired mixer requires dozens of individual batches. Each one needs accurate measurement, thorough mixing, and prompt placement before the previous batch begins to set. What a ready-mix delivery places on site in under an hour typically takes one person an entire day of physically demanding work.
Waste and Disposal Risk
Bagged concrete and raw ingredients cannot be returned once opened. Any over-estimation results in hardened waste. That waste requires either skip hire or a licensed waste contractor to remove. Neither option comes cheaply, and neither appears in most initial cost estimates.
Did You Know?
Incorrect mixing ratios are one of the leading causes of premature cracking and structural failure in domestic construction. Getting the water-to-cement ratio wrong by even a small margin significantly reduces compressive strength.
What Does Premixed Concrete Actually Cost in the UK?
Ready-mix pricing varies by region, grade, volume, and delivery distance. These figures represent typical 2025 UK market rates.
Ready-Mix Concrete Price Ranges
| Concrete Grade | Typical Use | Price Per m³ (approx.) |
| GEN 1 | Foundations, mass fill | £90 to £120 |
| GEN 3 / C20 | Garage floors, pathways | £100 to £130 |
| RC25 / C25 | Reinforced slabs, driveways | £110 to £140 |
| RC32 / C32 | Commercial floors, structural | £120 to £160 |
| Fibre reinforced | Driveways, industrial floors | £130 to £170 |
Additional Charges to Be Aware Of
- Short load surcharge: £50 to £150 for orders under one cubic metre
- Saturday delivery: £30 to £80 premium over standard weekday pricing
- Pump hire: £200 to £500, depending on pump size and access requirements
- Waiting time: £2 to £3 per minute beyond the agreed unloading window
Pro-Mix Concrete provides transparent pricing before any order is placed. Our online calculator produces an instant cost estimate based on project dimensions and concrete grade. Same-day and next-day delivery is available across London and the surrounding areas.
The True Cost Comparison: Project Size Is Everything
The honest answer to whether premixed concrete is cheaper depends entirely on the volume the project requires. There is no universal answer. There is only a threshold that shifts the economics decisively.
Very Small Projects (Under 0.25m³)
Setting fence posts, patching small areas of pathway, or filling minor voids rarely justifies a concrete delivery. Delivery minimums and short-load surcharges make very small volumes uneconomical to order as ready-mix. A few bags of premixed concrete from the merchants, or raw ingredients mixed by hand, is the more practical approach at this scale.
Small to Medium Projects (0.25m³ to 2m³)
This is the range where the decision becomes genuinely nuanced. A volumetric mix-on-site service becomes competitive here. Payment covers only what is poured, avoiding short-load surcharges entirely. DIY mixing at this scale grows increasingly time-consuming. Equipment hire costs begin to erode any material savings fairly quickly.
Larger Projects (Over 2m³)
Ready-mix or volumetric concrete almost always costs less than DIY mixing at this volume. Labour time, equipment hire, material waste, and quality consistency all combine to make professional supply the more economical choice. Express Concrete’s analysis found savings of £170 to £370 on a two cubic metre project alone. On a five cubic metre driveway pour, that gap widens considerably.
Did You Know?
The UK ready-mix concrete market processes over 20 million cubic metres annually. That consistent growth reflects a shift away from site-mixed concrete as builders recognise the true total cost of DIY mixing at a meaningful scale.
Hidden Costs of DIY Concrete Mixing That Competitors Never Mention
Most cost comparison articles stop at materials. These are the costs that rarely appear in the calculation but consistently undermine the apparent savings of DIY mixing.
Consistency and Quality Risk
Ready-mix concrete arrives certified to BS EN 206 with every batch tested before dispatch. A DIY mix carries no such assurance. That missing documentation creates real problems at Building Control sign-off.
- No proof of mix design for insurers
- Mortgage lenders request certification on completion
- Substandard concrete triggers costly remedial work
- Property sales stall without specification evidence
Setting Time Pressure
Batch-by-batch mixing creates cold joints where earlier pours begin setting before later batches land. Cold joints develop into full cracks under load or thermal movement over time.
- Cold joints reduce tensile strength across the pour
- Bond failure between batches cannot be reinforced
- Surface appearance hides the cold joint presence beneath
Weather Sensitivity
Professional batching plants monitor and adjust for ambient conditions before dispatch. A site-mixed batch has none of those safeguards against unpredictable British weather.
- Frost permanently weakens cement hydration
- High winds cause plastic shrinkage cracking
- Rain dilutes the water-cement ratio unpredictably
- Stored powder cement absorbs humidity between sessions
Physical and Legal Risk
Beyond personal injury, DIY concrete work on structural elements carries liability implications most homeowners never consider.
- Structural DIY may void home insurance if undeclared
- Incorrect concrete needs an engineer’s sign-off before sale
- Cement wash water is classified as hazardous waste
- Set concrete disposal requires a licensed waste carrier
For any domestic project where these risks feel like more trouble than the savings are worth, Pro-Mix Concrete’s team advises on the correct grade before confirming the order. The concrete that arrives is right for the job from the very first pour.
The Volumetric Alternative: The Option Most Comparisons Miss
Most cost comparisons pit bagged premixed concrete against factory-batched ready-mix and ignore the third option entirely. Volumetric mix-on-site concrete sits between the two. It often represents the best value for domestic and small commercial projects.
How Volumetric Concrete Works
A volumetric truck carries raw materials in separate compartments. On arrival, the operator mixes fresh concrete to the specified grade at the rear of the vehicle. The mix can be adjusted in real time. Different grades, admixtures, or water content can all be changed if site conditions require it.
Why Volumetric Often Wins on Cost
- Payment for the exact volume poured, not an estimated order
- No short-load surcharges on smaller quantities
- Unused materials return on the truck rather than creating waste
- Fresh concrete throughout the pour rather than a single time-limited batch
- Grade adjustments available on site without ordering a second delivery
For a domestic driveway, patio base, or garage floor, volumetric concrete frequently costs less in total than either factory-batched ready-mix or a full DIY mixing operation. That holds once all associated costs are honestly totalled.
Concrete Grades Explained: Getting the Specification Right
Using the wrong grade wastes money on unnecessary strength. More dangerously, it creates a structural weakness that manifests months or years after the pour.
Common UK Concrete Grades and Their Applications
- GEN 0 to GEN 3: Non-structural applications, mass fill, blinding, simple footings
- C20 / RC20: Pathways, shed bases, garden features
- C25 / RC25: Driveways, garage floors, lightly reinforced slabs
- C30 / RC30: Heavily trafficked driveways, commercial floors, structural elements
- C35 and above: Foundations, columns, load-bearing elements
Over-specifying wastes money on unnecessary cement content. Under-specifying risks of structural failure. A professional concrete supplier advises on the correct grade before any order is confirmed, drawing on the specific application and site conditions.
Which Option Is Right for Your Project?
Pick Bagged Premixed Concrete When:
- The project requires less than 0.25 cubic metres
- Simple repairs or post-setting work only
- Access makes delivery impractical
- No scheduling flexibility is available
Choose Volumetric Mix-On-Site When:
- The project falls between 0.5 and 5 cubic metres
- The exact volume is difficult to estimate in advance
- Waste and over-ordering are genuine concerns
- Grade adjustments on site may be needed
Select Factory-Batched Ready-Mix When:
- The project requires over two cubic metres in a single session
- The site has good access for a full-sized delivery lorry
- Building Control certification is required
- Speed of placement is critical
Choose DIY Mixing When:
- The project is very small, under 0.1 cubic metres
- Location makes delivery costs prohibitive
- The mix requirement is highly specialist or experimental
FAQs
Is it cheaper to mix your own concrete or buy ready-mix in the UK?
For projects under 0.25 cubic metres, DIY mixing is usually cheaper. Above that threshold, ready-mix or volumetric concrete almost always costs less. Equipment hire, labour time, and waste disposal are the costs that tip the balance consistently in favour of professional supply.
What is the minimum order for ready-mix concrete in the UK?
Most factory-batched suppliers set a minimum of one cubic metre. Below that, a short-load surcharge applies. Volumetric suppliers can deliver smaller quantities without minimum order penalties, making them more cost-effective for smaller domestic projects.
How much does ready-mix concrete cost per cubic metre in the UK?
Typical 2025 prices range from £90 to £160 per cubic metre depending on grade, region, and supplier. London and the South East generally attract higher prices due to plant and delivery costs. Short loads, Saturday delivery, and pump hire are charged separately.
Is Premixed Concrete Cheaper Than It Appears?
The upfront cost of premixed concrete looks higher than a trip to the builders’ merchant for raw materials. That comparison is misleading! It ignores equipment hire, labour time, quality risk, and the increasing impracticality of DIY mixing as project volume grows.
For anything beyond the smallest patch or post-setting job, premixed concrete delivered by a professional supplier is almost always cheaper in total. It is faster to place, more consistent in quality, and far less physically demanding than the DIY alternative. The apparent material saving of mixing your own disappears quickly once the full picture is honestly costed.
Skip the mess, delays, and hidden costs of mixing concrete yourself. Pro-Mix Concrete delivers ready-mix and volumetric concrete across London and surrounding areas with fast turnaround, transparent pricing, and the exact mix your project needs.
Get a quick quote today and keep your project moving without the extra workload.
- Dennis Broderick is the founder and owner of Pro-Mix Concrete Company, a trusted name in ready-mix concrete solutions across the UK. With over 20 years of hands-on experience in the construction and concrete industry, Dennis brings unmatched expertise, practical insights, and a commitment to quality on every project - from residential driveways to large-scale commercial developments.
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