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BaseBuild Groundworks Construction

5.0(34 reviews)See reviews ↓·London

What customers say

Based on genuine customer reviews

Households and contractors in London turn to BaseBuild Groundworks Construction for the groundwork phase of their builds, and the accounts that recur most often concern the breadth of work the firm handles in-house. Several reviewers describe temporary preparatory work and piling, underpinning carried out in sections where access was tight, and formwork and concrete laid for a rear extension slab that finished level enough for building control to sign off at the first inspection.

Precision and technical skill are mentioned repeatedly, alongside punctuality and a readiness to fit around a client's builder's timeline. An aspect raised across a number of reviews is the quality of advice given at the outset, with customers recalling site visits where the team set out the sequence of tasks and diagnosed a failed basement tanking membrane that others had misread, resolving persistent water ingress along a rear terrace wall.

Reviewers repeatedly note that quotes arrived quickly, that communication stayed easy throughout, and that issues arising mid-project were settled without drama, while the crew is described as friendly and clear when explaining each stage. Basement waterproofing, concrete work, steel and structural elements all feature in these accounts, and the same themes of reliability and decision-making support run from first contact through to completion.

Concrete contractorContractorEarth works companyExcavating contractorMetal servicesSteel erector

Reviews

Reviews are taken from publicly available sources.

KL
Kitty Ludszky20 July 2026

BaseBuild handled the structural steelwork and temporary propping for a load bearing wall removal on the ground floor of our property. The opening was wider than usual and the engineer specced a fairly heavy beam plus a pad stone arrangement on one side because of an existing chimney breast. Before they touched anything they put the propping in across both floors, and it stayed there longer than I assumed it would because they wanted the steel fully bedded before releasing any load. The beam went in on a Thursday and by the following week the propping was out and the plasterer could start. What I noticed most was that the floor above hasnt shifted at all, no cracks in the bedroom ceiling, no sticking doors upstairs. For the kind of work where you only really know if it was done right months later, thats what matters.

GT
Gererd T-J Butler12 July 2026

Solid groundworks team did the foundations and some structural steel for rear extension knew what they were doing didn't leave any loose ends for the next trade price was in line with two others

RG
Reece Greensmith20 May 2026

We had water coming into the basement every time it rained heavily. It had been a problem since we moved in but last winter it got bad enough that we couldn't use the space at all - standing water along the back wall and damp creeping up everywhere. We spoke to a couple of companies around Marylebone and got mixed advice, but BaseBuild were the ones who came out and actually diagnosed it properly. Turned out the original tanking membrane had failed in a few spots and the drainage channel along the base was basically blocked. They stripped back the affected walls, installed a new cavity drain membrane system, put in a sump pump, and redid the drainage run to the exterior. It was about two and a half weeks of work and they kept us updated on progress each day which made it easier since we were living upstairs the whole time. We've had a few heavy storms since and the basement has stayed completely dry. Made what was basically a dead room into usable storage again which is all we really wanted.

SC
Scott Caldwell8 May 2026

They did our formwork and concrete for our rear extension slab. Came back nice and level. Building control signed it of on the first inspection which saved us a lot of hassle

JT
Jaz Thind3 May 2026

Needed groundworks sorted before the rest of the build could move. These lot keep it simple kept things moving and the site never felt messy or forgotten. Solid job

CO
Cookbook of Life7 April 2026

Our build had basically stopped at the groundwork stage because nobody wanted to take proper responsibility for that part. A few people were happy to talk in general terms, but when it came to the digging, concrete and making sure the base was actually right, things got vague fast. BaseBuild were a lot more direct about it. They looked over the site, pointed out what needed doing first and what had to wait, and that was probably the first time this part of the job felt clear instead of slightly all over the place. What I liked was that the conversations stayed plain. If something needed sorting before the next step, they just said so. No long speech, no hard sell. Once they got going, you could see the difference on site pretty quickly. It started looking like a job that was under control rather than one everyone was tiptoeing around. The excavation was done properly, the concrete side looked right, and the steel supports were worked in without making it sound more complicated than it needed to be. This was one of those stages where getting it wrong would have caused problems later, so I paid more attention than usual. In the end that was the main reason I felt good about using them - not because they talked a big game, but because the work itself made the next part of the build possible again.

S
Stacie19 March 2026

They did the underpinning in alternate bays which I guess is standard but they explained why each section needed to cure before moving on, which none of the others even mentioned. The thing that sticks with me is how the lead on site caught a misalignment in one of the steel beams for the new opening before it got concreted in, something our building control officer said he would have flagged later anyway but it saved us probably two weeks of rework. Still got the landscaping to sort out but the structural stuff is all signed off now.

Groundworks & excavation in London compared

Ordered by rating, weighted by the number of reviews — businesses with only a handful of reviews do not jump to the top automatically. 12 businesses in this category in London are compared.

RankProviderRatingReviewsOpen Sat.
1BaseBuild Groundworks Construction (this page)★ 5,034No
2Wjb ground works Limited★ 5,04Yes
3Groundworks & Steelworks London Ltd★ 5,016No
4Lewis Groundwork Ltd★ 5,023Yes
5L&V Underpinning Services★ 5,011No
Contact
Working hours
Monday08:00–17:00
Tuesday08:00–17:00
Wednesday08:00–17:00
Thursday08:00–17:00
Friday08:00–17:00
SaturdayClosed
SundayClosed