Marine Aggregates Research Project

The Crown Estate

Through KLH Sustainability’s involvement on The Crown Estate’s St James’s Market project, KLH secured a research project to help The Crown Estate assess the sustainability of marine aggregates for use in construction projects.

The project aim was to evaluate the sustainability benefits and impacts of using marine aggregates, from The Crown Estate’s portfolio, using sound scientific research and consultation with industry to dispel the misconceptions about the sustainability of this overlooked resource.


KLH developed an alternative approach to the assessment of sustainable sourcing and use of aggregates. The new assessment methodology was based around three criteria: local availability of aggregates, social impact of transportation, and carbon footprint. The proposed methodology adds additional understanding to the sustainable sourcing of aggregates in an area where recycled or secondary aggregates are often considered as the default sustainable solution.


The final research paper was highly commended by the client, and KLH were asked to present their findings at the annual Crown Estate Marine Minerals Conference.


KLH Sustainability continue to engage with the Building Research Establishment on behalf of The Crown Estate to understand how the research should influence BREEAM and the wider industry.


The Crown Estate

Time frame