Construction Quantum Experts

Specialists in
Specialists in

Brant construction quantum experts

Our services

Construction Quantum Experts, Brant, are a professional Chartered Building Consultancy, specialising in Dispute Resolution and Quantity Surveying, offering commercial support services nationally and internationally.

Our specialist expertise lies in the fields of Adjudication Support, Mediation Support, Litigation Support and acting as Expert Witness. This is in terms of both Quantum and Forensic Delay Analysis issues. We have represented clients in disputes ranging from several thousand to several million pounds.

Expert Witness​

Brant work with many leading Construction Lawyers, acting as Quantum Experts. More details of our Expert Witness Services can be found in a number of our case studies.


Brant supports clients to promote and defend complex disputes. We can work as an advocate for the Client or can be instructed by Solicitors to act as an Independent Expert.

Commercial Support

Brant offers many commercial services, such as reviewing abnormal development costs, dispute avoidance, PQS, Employer's Agent, project surveying and retention recovery.

Contractors, Sub-contractors & More

Dispute Resolution

Our team’s experience, gained across a broad spectrum of the Construction industry, enables us to approach Construction Dispute Management from all angles and to provide accurate, reliable and cost-effective solutions for a range of clients:

Solicitors • Contractors
Sub-Contractors • Employers • Insurers
Developers • Land Agents • Land Owners • Architects

Company Philosophy


Since its establishment in 1995, Brant has grown to become a respected specialist in Construction Quantum, Dispute Resolution and Dispute Avoidance. The principles on which the company was founded are still key to our company philosophy; hard work, diligence, commitment and reliability.

Case Studies


With extensive experience of Adjudication, Mediation and other forms of dispute resolution (ADR) in the construction industry over the last 25 years, our consultants can undertake the most complex briefs. Here are some case studies:

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Expert Witness (Quantum)

Brant, acting as Quantum Experts for the TCC, was engaged by the defendants’ solicitors... more >

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Adjudication Support

Brant acted as an advocate for a Main Contractor, defending a final account adjudication... more >

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Mediation Support

In this case, Brant acted for a private individual, as an advocate in a complex Mediation... more >

"I have engaged Ian as an expert witness (quantum – construction disputes) on a number of occasions and have been impressed by his clear, commercial and pragmatic approach. He is very responsive and I would recommend him for expert witness work without hesitation."
Charlotte Heywood
Partner - Stephenson Harwood

Brant construction quantum experts

A Full Wrap Around Service

We also provide traditional Quantity Surveying services such as procurement and the production of interim applications for payment and final accounts. As well as this we have specialist experience in assessing Abnormal Development costs.

To allow us to deal with more complex issues we have long standing relationships with excellent Construction Lawyers and a team of specialist consultants.

Brant construction quantum experts

Our Consultants

Mark Brant construction quantum expert

Mark Brant BA (Hons), DipSurv, MCIOB


Mark specialises in disputes across JCT, NEC and other Contracts. He is regularly instructed by solicitors to act as a Quantum Expert… more >
Ian Brant construction quantum expert

Ian Brant BSc (Hons), FCIOB


Ian provides all-round commercial and contractual support to clients. Ian is also regularly instructed by solicitors to act as a Quantum Expert… more >
Brant construction quantum experts

Our Latest Insights

Here you will find links to our most recent insights, along with documents we have posted in our newsletters in the past.

In addition, we have a number of case studies which can be viewed and which demonstrate the range of services that we provide.

Brant construction quantum experts


Our involvement can range from guidance and advice, to full management and resourcing of a particular matter. If you would like a no obligation consultation about any issues you may have, or you would like more information about our services, call us on 01733 568687.

If your enquiry is not urgent or you would like to subscribe to our newsletter, please complete the enquiry form below.