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5 Star Customer Service
Foundations & Site Groundworks Contractors in South Wales
Foundations, utilities installation, retaining walls and full site preparation for developments and extensions across Rhondda Cynon Taf and South Wales.
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Accreditations & Qualifications
Site Preparation & Foundation Specialists
Whether you're starting a new build, extending an existing property, or preparing a commercial site for development, C&M Jones delivers the groundworks that get your project out of the ground.
Based in Mountain Ash, we work with developers, builders, architects and private clients across South Wales — handling everything from initial site clearance through to fully prepared foundations ready for the superstructure.
With over 50 years of combined experience and full accreditations, we have the equipment, the team and the technical knowledge to deliver groundworks safely, accurately and to programme.
Foundations & Groundworks Services
We provide a complete groundworks package, scoped to suit your build type, ground conditions and programme requirements.
Strip foundations — for traditional masonry construction
Trench fill foundations — for fast, robust foundation installation
Raft foundations — for sites with poor or variable bearing capacity
Reinforced concrete foundations — for heavy or structural loads
Site clearance & excavation — preparing sites for development
Utilities installation — water, drainage, electric and gas connections
Retaining walls & screen walls — boundary, structural and decorative
Hardcore & sub-base preparation — ready for slab pours and surfacing
Foundations & Groundworks Services
We provide a complete groundworks package, scoped to suit your build type, ground conditions and programme requirements.
Strip foundations — for traditional masonry construction
Trench fill foundations — for fast, robust foundation installation
Raft foundations — for sites with poor or variable bearing capacity
Reinforced concrete foundations — for heavy or structural loads
Site clearance & excavation — preparing sites for development
Utilities installation — water, drainage, electric and gas connections
Retaining walls & screen walls — boundary, structural and decorative
Hardcore & sub-base preparation — ready for slab pours and surfacing
The Foundation of Every Successful Build
Get the groundworks wrong and the entire project suffers — settlement, cracking, drainage problems and structural issues all start below ground. That's why developers and builders trust experienced groundworks contractors who understand the technical detail.
We work directly from architect's and engineer's drawings, set out accurately, and deliver foundations that meet the specified bearing capacity, depth and reinforcement spec. Every pour is supervised, every excavation is signed off, and every detail is delivered to current Building Regulations.
From single house extensions to multi-plot developments, we bring the equipment and the experience to take your project from breaking ground to ready-for-build.
The Foundation of Every Successful Build
Get the groundworks wrong and the entire project suffers — settlement, cracking, drainage problems and structural issues all start below ground. That's why developers and builders trust experienced groundworks contractors who understand the technical detail.
We work directly from architect's and engineer's drawings, set out accurately, and deliver foundations that meet the specified bearing capacity, depth and reinforcement spec. Every pour is supervised, every excavation is signed off, and every detail is delivered to current Building Regulations.
From single house extensions to multi-plot developments, we bring the equipment and the experience to take your project from breaking ground to ready-for-build.
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Starting a new build or extension?
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Groundworks and civil engineering contractors serving Rhondda Cynon Taf and South Wales. Reliable. Accredited. Experienced.
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