John Sheehan

Groundwork & Civil Engineering

Delivering Results

Delivering exceptional results for complex construction projects across Oxfordshire, the Cotswolds and the South East of England.

We are a specialist groundwork and civil-engineering contractor, trusted by private clients, developers, and major institutions to deliver challenging projects safely, efficiently and to the highest standard.

398

Projects complete

120

Returning customers

32

Years of experience

Case Studies

Over the past 25 years we have completed an extensive range of projects for private clients, main contractors and nationally recognised institutions. Our work includes:

QUEEN'S COLLEGE OXFORD

A complex basement build to create new kitchen facilities for the city’s oldest college, delivered within a constrained and sensitive heritage environment.

TUSMORE HOUSE, OXFORDSHIRE

Substructure, drainage and estate-road works for a major country-house redevelopment, requiring high-precision engineering and large-scale coordination.

ASHMOLEAN MUSEUM, OXFORD

Specialist civil-engineering works overcoming tight access restrictions and heritage constraints in one of Oxford’s most significant cultural buildings.

BAGLEY LODGE

We created a semi-basement in this stunning contemporary redevelopment of a family home.

PRESTIGIOUS OXFORDSHIRE HOME

We delivered a significant construction project at the remarkable redevelopment of a prestigious in the Oxfordshire countryside.

COUNTRY HOUSE, SURREY

The design for the replacement house in Surrey restored the structure of the estate, reinstating a central focus on the site of the original mansion, which was destroyed by fire in 1953.

NAZRIN SHAH CENTRE

John Sheehan (Oxford) Ltd completed extensive groundworks at the prestigious Sultan Nazrin Shah Centre at Worcester College.

BASEMENT BUILD IN GRADE II LISTED COUNTRY HOUSE

John Sheehan (Oxford) Ltd completed all groundworks to create a new basement to provide living accommodation at a 19th Century Grade II Listed building in the Home Counties.

Why Choose Us

With 37 years’ experience and over 420 completed projects, we bring deep technical expertise, robust project management and a genuinely client-focused approach. Our team is known for solving complex engineering challenges — from basement construction in listed buildings to extensive substructural works on major residential and commercial developments.

Over the last five years, our safety record has been exemplary, with zero reportable HSE notices. This reflects our commitment to rigorous safety systems, continuous staff training and disciplined on-site procedures. Clients trust us to deliver work that is not only accurate and efficient but consistently safe.

We operate across Oxfordshire, the Home Counties and the wider South East, with particular experience in high-end residential, heritage, education and commercial sectors. Whether the project demands precision, sensitivity or large-scale coordination, we bring the equipment, expertise and attitude to deliver results.

Behind the build

Our gallery showcases the raw engineering, craftsmanship and precision that sit beneath every finished mansion, estate and commercial development. From excavation and structural works to complex temporary engineering solutions, these images reveal the real foundations of our projects — the essential work that makes exceptional buildings possible.

Safety is central to everything we do

We maintain strict safety protocols, continuous workforce training and strong communication on every project.

Our zero reportable HSE notices over the last five years demonstrate the effectiveness of our systems and the seriousness with which we approach safe project delivery.

Our Services

We offer a complete range of groundworks and civil-engineering services, including:

> Foundations – pad, strip, raft and piled solutions, designed and built for new-builds and complex substructures.

> Underpinning & Structural Support – engineered stabilisation for existing buildings, heritage structures and basement works.

> Temporary Works & Shoring – safe, compliant systems for excavations, façade retention and restricted-access environments.

> Bulk Excavation & Muck-Away – efficient material movement using our own fleet and experienced logistics team.

> Waterproofing & Reinforced Concrete Structures – full basement box construction, waterproofing solutions and reinforced concrete works.

> Drainage, Utilities & External Works – installation of service networks, estate roads, hard landscaping and site-enabling works.

We provide a fully integrated service — one team delivering coordinated solutions from enabling works to final groundworks.