Tonbane reinforced concrete pour, London
Groundworks & General Building Contractor · London

Groundworks, concrete and basements. Built from the ground down.

Excavation, drainage, reinforced concrete and external works for developers and main contractors across London.

London Based
Established 2019
Health & Safety First
Developers & Main Contractors
References Available
What We Do

From dig to handover

Recent Contracts

Real projects, real numbers

01

West London Basement

£1.4mPrivate DeveloperEaling

Bulk excavation, temporary works, underground drainage and attenuation, RC basement formation, waterproofing, structural steelwork and suspended RC slab.

West London basement, Ealing
02

Waltham Forest Town Hall

£795kForan ConstructionWaltham Forest

Excavations to formation, drainage and attenuation, sub base, bedding screed, Purbeck stone slabs, kerbs and edgings.

Waltham Forest Town Hall external works
03

Osier Way Paving

£535kPocket LivingLeyton

Excavations to formation, underground drainage, sub base, bedding screed, block and granite paving, kerbs and edgings.

Osier Way block paving, Leyton
04

Imperial College

£420kGrahamLondon

Excavations to formation, underground drainage, sub base, granite setts, block and granite paving, kerbs and edgings.

Imperial College granite paving
05

Amersham Slab

£375kThames WaterAmersham

Level and grade, sub base crushed stone, reinforcement, formwork and concrete.

Amersham reinforced concrete slab
About Tonbane

Hands-on and dynamic

Incorporated in 2019 by Director Aidan McGrory, Tonbane brings an honest, personal and professional approach to every project, no matter the size. We build long term relationships with our clients, built on integrity and an understanding of their needs.

Est. 2019 Director-led QEHS Culture
Waltham Forest Town Hall external works by Tonbane
What Clients Say

Trusted on site

★★★★★

"Tonbane delivered our basement package in Ealing from bulk dig through to the suspended slab. Tidy site, good paperwork, programme held."

Development Manager · West London
★★★★★

"We used Tonbane for external works and paving at Leyton. Setting out was spot on and the granite work finished really well."

Site Manager · East London
★★★★★

"Straightforward to deal with and safety-led on site. The drainage and RC works were done right first time. Would use them again."

Contracts Manager · London
Where We Work

London and the Home Counties

Pricing a Package?

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Get In Touch

Tell us about your project

Registered Office

40 Brentham Way, London, W5 1BE

Fast Response

Enquiries answered within one working day.

References Available

Ask about our completed developer and main contractor packages.

Guides & advice

Latest advice

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29 August 2026 Basement Conversion Costs in London: A 2026 Guide