
Let’s Rewind… What Does a Principal Contractor Actually Do?
The Principal Contractor is responsible for managing the entire construction phase of a project, with a focus on health, safety, and coordination. This includes:
- Planning and managing site activities
- Coordinating multiple contractors and trades
- Ensuring all workers and visitors are properly inducted and briefed
- Monitoring compliance with CDM 2015 regulations
- Managing risk assessments and method statements (RAMS)
- Overseeing site safety documentation, including fire plans, traffic management plans, and health & safety files
They are essentially the team leader for everything happening on-site. Without them, there’s a high risk of miscommunication, unsafe practices, and delays.
Why Clients Trust NSI Projects as Their Principal Contractor
At NSI Projects, we’ve built a strong reputation as a trusted Principal Contractor for complex and multi-contractor projects. With 45+ years of industry experience, we go beyond compliance, we take a hands-on, proactive approach to managing your site safely and efficiently.
We provide experienced, qualified professionals on site. This means real-time management of site activity, ensuring everything runs according to schedule and in line with the highest safety standards.
We take responsibility for all CDM documentation, including site safety plans, inductions, RAMS approvals, weekly and monthly reporting, and responding to any health and safety issues or incidents on site. Our clients know they can trust us to stay on top of the details while keeping the big picture in focus.

Delivering Peace of Mind
Ultimately, appointing a Principal Contractor is about confidence. It means knowing your project is in safe hands. That your contractors are being looked after. That the site is running smoothly. And that you’re protected, legally and practically, from the many risks that can arise on a busy construction site.
At NSI Projects, we take pride in offering that confidence to every client.
If you’re starting a construction or fit-out project and want to make sure it’s delivered safely, efficiently, and fully compliant, then appointing the right Principal Contractor is your first step.
Your Trusted Principal Contractor – Read more about NSI Projects’ expertise and services.
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Why Use NSI Projects?
NSI Projects have over 45 years of experience in delivering great projects for commercial buildings. We partner with leading suppliers and experts to design, procure and install practical and cost effective solutions for our customers.
Call our experts today on 0800 027 1966.

Testimonials

Huboo.
The team at NSI Projects provided a complete design and build service to Huboo for this project, taking time to understand our requirements and turning the design into reality. They provided trusted advice and safe project management, allowing us to get on with our daily operations knowing that the installation was under control.
Billy Ansell - Facilities Manager
Ribble Technologies.
We received top notch service from Alex Gallagher and the team with the install of our racking, couldn't recommend NSI enough! Nothing was too much trouble, amazing customer and installation service from start to finish.
Emma Cook - Office Manager
Bulk Powders.
On behalf of Bulk Powders, NSI Projects designed, procured and managed the installation of the automated pallet shuttle system from start to completion, the site was managed so that the installation and ongoing operations could exist side by side.
Guy Martin - Project Consultant
DHL Stirling Park.
I wanted to take a moment to express my sincere gratitude for the outstanding job your team did on our recent warehouse project. The changes and installation of the new racking was executed flawlessly and within budget, which is a testament to your team’s expertise and professionalism. Their attention to detail, commitment to quality workmanship, and ability to keep everything on track were truly impressive. They went above and beyond in ensuring that all aspects of the project were completed satisfactorily.
Andrius Cekanauskas - Senior Planning Manager DHL Manufacturing Logistics
Euro Options.
We love the job NSI Projects have done, they worked efficiently and completed the job above our expectations.
Ian Tait - Commercial Manager Euro Options
John Scott Works.
A big thank you to NSI Projects for providing us with a quick and quality service.
Matthijis Schot - CEO PRN Group