London Rear Extension Case Study Using Mini Concrete Pump Hire

Most London rear extensions share one problem: the concrete needs to go at the back of the house, but the only way in is through the building or a narrow side return. There is rarely room for a mixer truck to get close.

This case study walks through a single-storey rear extension on a London terraced house, where barrowing was not realistic and a mini concrete pump did the job in a few hours. Easypump Concrete Ltd handled both the supply and the pump, and the points below apply to almost any tight-access extension in the city.

London Rear Extension Case Study: The Project Brief

The job was a standard single-storey rear extension on a mid-terrace London home. The owner needed concrete poured for the footings and a ground-floor slab, with the build team waiting to carry on once the concrete was down.

On paper it was a small pour. The real complication was getting the concrete from a truck on the street to a working area right at the back of the property, with the house sitting in the way.

Key details of the job:

• Property: mid-terrace house, London
• Work: single-storey rear extension
• Concrete: strip footings plus a ground-floor slab
• Volume: a small pour, well within a mini pump’s range
• Access: no side access, with the house between the road and the pour

Why Barrowing Was Not an Option

The classic London problem is that the rear garden can only be reached through the house or along a tight side return. Either route turns a quick pour into a slow, messy job.

Barrowing wet concrete through a finished or half-built home risks spills, damaged floors and a lot of cleaning. It also ties up a team of people for many trips, and every minute spent barrowing is a minute the concrete is setting.

The main problems with barrowing this kind of job:

• Long, slow trips from the truck to the rear
• High risk of mess and damage inside the property
• Several workers tied up just moving concrete
• Cold joints forming while the pour drags on

For a footing or slab, that last point matters most, since breaks in the pour create weak lines that can crack later.

Why a Mini Concrete Pump Was the Right Call

A mini concrete pump, often a compact line pump, is built for sites like this. It has a small footprint, so it can sit on the road or a driveway, and it pushes concrete through a hose that runs to the exact pour point.

For this extension, the hose was run along the side return to the rear, keeping the inside of the house clean and the pour moving. Easypump matched the pump to the access before the day, so there were no surprises on site.

Why the mini pump suited the job:

• Small footprint that fits on a London street or driveway
• Hose runs through tight gaps to reach the rear
• Fast, clean placement straight into the footings and slab
• Far less labour and no barrow runs through the house

Planning the Pour

Most tight-access pours succeed or fail on preparation. The owner sent photos and a short video of the access, which let Easypump plan the pump, the hose run and the setup spot well in advance.

Street parking was the other key detail. On a London road the truck and pump need a clear, reserved space, so the slot was booked early and cones were put out to hold the room on the day.

The prep checklist for this job:

• Access photos and video shared before the day
• Truck and pump parking confirmed on the street
• Concrete volume and mix type agreed
• Time slot booked, early in the day
• Formwork, reinforcement and labour ready on site

Sorting these out in advance meant the pump could start as soon as it arrived, with no costly waiting time.

Pour Day, Step by Step

With the prep done, the pour itself was quick. The truck and mini pump set up at the front, the hose was run to the rear, and the concrete flowed steadily into the footings and then the slab.

A continuous feed meant the gang could level and finish as they went, rather than waiting between barrow loads. The whole pour stayed inside the concrete’s set window with time to spare.

How the day ran:

1. Truck and mini pump set up at the front of the property
2. Hose run along the side return to the rear extension
3. Footings poured first, then the ground-floor slab
4. Gang levelled and finished the concrete as it arrived
5. Pump and hoses cleaned, work area left tidy

The Result

The pour finished in a few hours with no damage to the house and no mess through the property. Because the concrete went in as one continuous body, there were no cold joints in the footings or slab.

That clean, single pour is what gives a footing and slab their strength, and it left the build team free to push on with the extension the same week.

In short, the outcome was:

• A clean pour with the house left undamaged
• No cold joints in the footings or slab
• The job done in hours, not a full day
• The build kept on schedule

Mini Pump vs Other Options for London Extensions

It helps to see why the mini pump beat the alternatives on this job. Barrowing was too slow and too messy, and a full-size boom pump was more than a small rear pour needed and harder to fit on a tight street.

The mini pump sat in the middle, with enough reach for the rear garden and a footprint small enough for a London road. For most single-storey extensions, that balance is exactly right.

How the options compared on this site:

• Barrowing: cheapest on paper, but slow, messy and risky indoors
• Boom pump: powerful, but oversized and awkward for a small street pour
• Mini line pump: right reach, small footprint, clean and fast

What London Homeowners Can Learn From This

The big takeaway is that tight access is not a reason to expect a slow, messy pour. With the right pump, the back of a London terrace is as reachable as an open site.

A little planning makes the difference, especially around street parking and access. Getting concrete and the pump from one supplier also removes the timing problems that come from juggling two separate firms.

Practical lessons from this job:

• Tight access does not block a good pour
• Book early to lock in street parking and a morning slot
• Get concrete and pump from one supplier for clean timing
• Send access photos and video upfront so the setup is planned

Could This Work for Your Extension?

If you are planning a rear extension in London with no side access, a mini concrete pump is usually the simplest answer. Easypump Concrete Ltd covers London, Hertfordshire, Bedfordshire, Buckinghamshire, Essex and Northampton, with trained operators and a price match guarantee on pump hire.

To talk through your job, call Easypump on 01582 550287 or email admin@easypump.co.uk. Send your address, the type of extension and a rough concrete volume, and we will give you a clear, no-obligation quote.