Business Details
15 Years
experience
Trusted Construction Contractors in Leatherhead
Established in 2011 by Steve and Lorraine Clarke, Mostrim Groundworks has grown into a respected SME specialising in groundworks and civil engineering. Our team combines over 30 years of industry experience with a commitment to quality, safety, and client satisfaction. We serve residential, commercial, and educational sectors, delivering projects on time and to the highest standards. Our values of growth, dedication, and respect underpin every project, supported by accreditations like CHAS, SMAS, and Investors in People. With a proven track record and a focus on innovation, we build long-term partnerships through reliability and excellence. 
Services
Foundations and substructures
Frames and podium slabs
Drainage
Roads and infrastructure
External works
Details
- Year established: 2011
Highlights and features
- We deliver projects on time or ahead of schedule.
- We provide cost-effective solutions through tendering or negotiation.
- Our vetted subcontractors and suppliers ensure quality.
- We hold Investors in People (IIP) accreditation.
- Our team has over 30 years of industry experience.
Associations and certifications
- CHAS
- SMAS
- Investors in People (IIP)
Services
Foundations and substructures
Our expert team delivers comprehensive groundwork solutions from foundations to oversite, ensuring a solid base for residential, commercial, and educational developments. We combine technical expertise with a commitment to quality and safety, using advanced methods to meet project-specific requirements. Our approach guarantees precision and efficiency at every stage.
Drainage
We install private and adoptable drainage systems, including mains sewers, with a street-works qualified team. Our solutions ensure compliance with regulations and long-term functionality, both within and beyond site boundaries. Robust planning and execution minimise disruptions while maintaining environmental standards.
Roads and infrastructure
Our highly trained supervisors and groundworkers deliver safe, high-standard road and infrastructure projects. We focus on durability and efficiency, adhering to strict health and safety protocols. From design to completion, we ensure seamless integration with surrounding environments.
External works
As CHAS and SMAS registered specialists, we complete external works to exacting standards, including landscaping and utilities. Our skilled team ensures deadlines are met without compromising quality, providing comprehensive solutions tailored to client needs.
Customer care
We prioritise long-term client satisfaction with a dedicated customer care team for remedials and additional requests. Our proactive approach ensures issues are resolved efficiently, maintaining project integrity and fostering trust through consistent, reliable service.
People
Stephen Clarke
Managing Director
Stephen has over 35 years in groundworks, leading with hands-on expertise and a commitment to quality. He co-founded Mostrim in 2011, shaping its culture of excellence and reliability.
Lorraine Clarke
Chief Operating Officer
Lorraine brings over 30 years of leadership experience, driving organisational efficiency and growth. She co-established Mostrim Groundworks, ensuring operational excellence and strategic direction.
Elise Clarke
Director
Elise transitioned from finance to leadership, managing the accounts team in Leeds. She is pursuing chartered status, combining financial acumen with strategic oversight.
Ellie Smith
HR Business Manager
Ellie organises staff training and health and safety initiatives. Her efforts contributed to IIP accreditation and recognition as a top workplace, ensuring a supportive, compliant environment.
Colm O'Reilly
Senior Quantity Surveyor
Colm has seven years of experience, transitioning from site work to office-based surveying. He provides detailed cost analysis and project management, adding significant value to our team.
Questions
What sectors do you specialise in?
We focus on residential, commercial, and educational projects, delivering tailored groundwork solutions for each sector.
Are you accredited for safety standards?
Yes, we hold CHAS and SMAS accreditations, ensuring compliance with rigorous health and safety protocols.
How do you ensure project deadlines are met?
Our experienced team uses meticulous planning and a dedicated workforce to deliver projects on or ahead of schedule.
Do you handle complex infrastructure challenges?
Yes, we tackle demanding projects, including deep basements, contaminated sites, and railway-adjacent developments with expert risk management.
What accreditations do you hold?
We are Investors in People (IIP) accredited and registered with CHAS and SMAS for safety excellence.
Can you manage large-scale developments?
Yes, we have extensive experience in projects ranging from 50+ unit housing estates to commercial infrastructure.
