CNJ Construction Consultants

Accurate Costing That Protects Your Margin

Independent cost consultancy for contractors who need accurate pricing, stronger tenders, and commercial control across residential and mixed-use projects.

Trusted by contractors, developers, and industry professionals

Who we are

Commercial Cost Support for Contractors

CNJ works directly with contractors to provide independent cost advice at every commercial stage of a project. From early pricing and tender submissions through to live cost control, we support contractors who want certainty, speed, and defensible numbers.

We understand the pressures of competitive tendering, fixed-price risk, and client scrutiny. Our role is to strengthen your commercial position, reduce exposure, and help you deliver projects with clarity and confidence.

What we offer

Services for Contractors

Cost Estimates

Drawings-based cost estimates using current market rates, giving contractors confidence to price accurately at feasibility or tender stage.

Detailed Cost Reports

Clear, itemised cost breakdowns that show exactly where money is allocated, supporting commercial decisions and client discussions.

Tender Package

Commercial review and cost clarification that strengthens tender submissions, reduces ambiguity, and limits post-award risk.

Reports in 2025

Contractors worked with

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Value of projects for 2025

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Company growth between 2024-2025

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Our Proven 3-Step Approach Gives Contractors Cost Certainty

Building work does not need commercial uncertainty. CNJ’s contractor-focused approach provides clear pricing, structured tender support, and ongoing cost insight, helping you commit to figures with confidence and protect margin from tender stage through delivery.

Step 1: Share Your Scope

Share your drawings, specifications, and tender requirements. We review scope, assumptions, and constraints to understand feasibility, risk, and pricing context.

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Step 2: Receive Clear Pricing

We can prepare cost estimates, cost reports and bill of quantities, aligning with scope, programme and market rates.

Step 3: Deliver With Commercial Control

We support contractors through tender review, cost clarification, and live cost management, helping reduce gaps, manage change, and protect margin throughout delivery.

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Ready to Discuss Your Project?

01483 339 733

Speak directly with our team or share your project details online. We will quickly assess where we can add commercial value.

Testimonials

Client Feedback & Reviews

“Conceptual Design Associates Ltd have been working with CNJ construction consultants for a number of years now, we have found Joshua Randall and the team at CNJ to be highly professional and knowledgeable in a volatile and uncertain construction industry. During and after Covid material and labour costs seem to increase at an unprecedented rate and we have relied on CNJ to give us and our clients cost certainty for their construction projects. Their advice and value engineering when required has given our clients comfort that their project will come in on budget. Our projects range from large domestic additions, to one off exclusive dwellings to multi-unit residential and mixed use schemes and we use CNJ on all of these types of schemes.”

“GLR has been using CNJ’s Quantity surveying services for 3 years. We have worked collaboratively pricing and winning projects, and have used their Cost Management service to monitor valuations, variations and final accounts on the majority of our projects. This provides financial security throughout the lifecycle of the project.”

“We have been using CNJ Construction Consultants for the past six years, and they have consistently delivered exceptional service. Their professionalism, reliability, and attention to detail set them apart from anyone else we’ve worked with. Their costs are reasonable, especially considering the quality of service they provide. One of the biggest advantages of working with CNJ is their face-to-face approach, which has proven incredibly valuable for our clients compared to online-only alternatives. This personal touch builds trust, improves communication, and ensures projects run smoothly from start to finish. We fully recommend CNJ Construction Consultants to anyone looking for a trustworthy, knowledgeable, and highly professional team. We will certainly continue to work with them for many years to come.”

“CNJ Consultants have helped me grow my business substantially. I have been working with Joshua, the Managing Director, for over 5 years and I can sincerely say that he made my life easier. CNJ are able to price jobs for me and provide valuations incredibly efficiently and are always on time. I can honestly say that CNJ are the 'go to' Consultancy services company who you can truly rely on at all times.”

"CNJ have been a great support to our business, particularly with estimates. Their work is detailed, well-structured, and easy to follow, and they’re always happy to talk through assumptions, exclusions, and any areas that need refining as a project develops. We’d happily recommend them to any contractor looking for a reliable estimating/QS partner"