About Mainline Groundworks
Mainline Groundworks delivers excavation, foundations, drainage and enabling works packages for housing developers, principal contractors and commercial projects across the UK.
We support projects from early site preparation through to infrastructure, external works and handover coordination.
Commercial groundworks and site delivery for developers and principal contractors.
Built around practical delivery
Mainline Groundworks was established to support developers and contractors with reliable groundworks delivery across residential, commercial and infrastructure projects.
Our teams coordinate excavation, foundations, drainage, enabling works and external packages with a focus on programme control, site safety and practical communication.
From reduced digs and piling support through to roads, drainage and reinforced concrete works, we work alongside clients from pre-construction through to final handover.
Today, Mainline Groundworks works with Mainline Surveys where projects need coordinated site delivery and surveying or site investigation — supporting developments across the UK with specialist site teams.
What we deliver
Groundworks delivery focused on site coordination, programme control and practical handover.
Groundworks packages
Coordinated substructure and external works delivered to programme and specification.
Excavation & enabling works
Bulk excavation, reduced digs, access preparation and early-stage site enabling.
Foundations & piling support
Strip, pad and raft foundations with piling coordination, caps and ground beams where required.
Drainage & infrastructure
Foul and surface water installation, tie-ins, attenuation interfaces and services coordination.
Roads & external works
Road build-ups, kerbs, footpaths and external areas aligned with site sequencing and access.
Site preparation & handover
Setting out support, QA records and practical handover coordination with follow-on trades.
Who we support
We work with developers, principal contractors and commercial clients requiring coordinated groundworks delivery.
Housing developers
Residential schemes requiring reliable packages from enabling works through to externals.
Principal contractors
Programme-led delivery with clear site coordination, reporting and QA documentation.
Commercial projects
Groundworks delivery for offices, education, healthcare and mixed-use developments.
Industrial & infrastructure schemes
Live-site conditions, access constraints and sequencing aligned with operational requirements.
How projects are delivered
A structured approach with clear site communication, programme focus and documented handover.
Pre-construction planning
Programme review, access planning, sequencing and coordination with site teams.
Site mobilisation
Set-up, plant and resource planning, RAMS, permits and safe working arrangements.
Groundworks delivery
Excavation, foundations, drainage and externals delivered with practical site communication.
QA & handover
Checks, records and coordinated handover to follow-on trades and client teams.
Operational coverage across the UK
Mainline Groundworks supports projects across London, the South East and wider UK developments with directly managed site teams, coordinated delivery and commercial support throughout the project lifecycle.
We align with programme requirements, access constraints and live-site conditions to maintain efficient project delivery.
- Residential & commercial projects
- Site-based delivery teams
- Groundworks & infrastructure packages
- Programme-led coordination
Mainline delivery businesses
Mainline Groundworks and Mainline Surveys operate as the group's primary delivery businesses — combining site delivery with surveying and site investigation for developers, principal contractors and commercial projects.
You are on the Mainline Groundworks site.
Health, safety and delivery standards
Site-ready operations with documented safety, compliance and practical delivery controls.
CITB
Training-led site teams with safe working practices and supervision.
SMAS
Pre-qualification aligned with commercial procurement and site requirements.
TrustMark
Professional contractor standards and accountable delivery.
RAMS & site compliance
Risk assessments, method statements and coordination for live-site delivery.
Insured contractor operations
Commercial cover and documented controls to support principal contractors and clients.
Experienced site teams
Practical communication, sequencing awareness and safe delivery on active sites.
Discuss your groundworks project
Speak with the team about excavation, foundations, drainage and enabling works packages.