A full service contractor usually provides a complete range of services from initial consultation through to final handover.
These can include site surveys, design coordination, planning support, groundworks, structural construction, roofing, plumbing, heating, electrical installation, insulation, internal finishing, and external landscaping. They also manage subcontractors, organise materials, and ensure compliance with building regulations.
Contractors estimate costs by reviewing architectural drawings, assessing site conditions, and calculating material and labour requirements. They factor in equipment, waste disposal, scaffolding, specialist trades, and any structural complexities.
Quotations are often itemised so clients can see how costs are distributed. Estimates may be adjusted if designs change or if new information emerges during planning.
Costs are influenced by material prices, labour rates, design complexity, site access, regional market conditions, and regulatory requirements. Additional factors include ground conditions, weather, specialist installations, and fluctuations in supply chains.
High demand for labour or materials can increase prices. Conversely, simple designs and straightforward access can help reduce costs.
Building services include systems that keep a property functional, safe, and comfortable. These services include plumbing, drainage, heating, electrical wiring, ventilation, fire safety systems, lighting, and sometimes air conditioning.
In larger buildings, services may also include lift systems, plant rooms, data networks, and control systems. All of these elements must comply with UK regulations.
Construction companies often provide support services such as site security, waste management, scaffolding, temporary utilities, welfare facilities, traffic management, and logistics planning.
They may also handle health and safety documentation, risk assessments, and project reporting. These services ensure that the site operates safely and efficiently at all times.
A services contract should define the scope of work, materials to be used, costs, payment schedule, timelines, responsibilities, and warranty information.
It should outline procedures for changes, delays, documentation, and quality standards. Clear terms help protect both the client and contractor, ensuring transparency and reducing the risk of disputes.
Support services help control logistics, manage people, maintain safety, and reduce downtime. For example, organised waste management keeps sites clear, while scheduled deliveries prevent congestion.
Temporary utilities ensure that workers have power, water, and welfare facilities. Effective site security protects materials and equipment. Together these services improve efficiency and support consistent progress.
A quantity surveyor manages the financial aspects of a construction project. They prepare cost estimates, track expenditure, value completed work, assess variations, and advise on budgets.
They also negotiate with suppliers and subcontractors. Their role helps ensure that the project remains within financial limits while maintaining quality and compliance.
Companies manage subcontractors by scheduling their work, reviewing qualifications, coordinating tasks, and monitoring quality. Subcontractors may be used for electrical work, plumbing, roofing, steel fabrication, or specialist installations. Contractors ensure that subcontractors meet safety requirements, follow project specifications, and deliver work on time.
Clear communication and organised supervision are essential for coordinated delivery.
A contingency allowance helps cover unexpected costs such as material price increases, unforeseen ground conditions, or design changes. For residential projects, a contingency of around ten percent of the total budget is common.
For more complex commercial or infrastructure projects, a higher allowance may be required. Including a contingency helps prevent financial strain during the project.