Welcome to the
CAS Directory
Expert tree specialists providing professional assistance with technical tree problems and reports.
View CAS MembersFounding
the Standards
of Industry
The Consulting Arborist Society originated from the Arboricultural Mortgage Insurance Users Group (AMIUG). It was engineered as a high-level vehicle for accredited consultants to provide definitive technical services to the financial and legal sectors.
Today, we govern eight core Areas of Professional Competency (APC). Whether a consultant offers a full-spectrum service or choice specialism, CAS ensures they are independently vetted for the specific technical rigour your instructions require.
Secure a Professional Report
Access our national directory of vetted specialists for accredited technical evidence.
Expert Witness
Definitive legal testimony for complex litigation support.
Mortgage Reports
Technical reports for property security and insurance.
Tree Inspection
Precise health and structural speciman assessments.
Tree Preservation
Strategic consultancy on TPO and conservation law.
Risk Assessment
Quantification to ensure safety and compliance.
Tree Valuation
Monetary value calculation for claims and assets.
Trees & Planning
BS5837 surveys to support planning applications.
Young Trees
Establishment guidance for long-term canopy growth.
Membership Tiers
Associate Member
- National Directory Listing
- Access to CAS Training Events
- Professional Peer Support
- Technical Resource Updates
Professional Member
- Full APC Vetted Status
- Bond Solon Expert Alignment
- Exclusive Use of Member Logo
- Priority Directory Placement
The Consulting Arborist Society (CAS) serves as the national authority for high-level arboricultural evidence. We govern a network of specialists across the United Kingdom, ensuring each meets the strict Bond Solon level of technical rigour.
By mandating these elite qualifications, the Society ensures that any report produced by a CAS member is authoritative, defensible, and suitable for the most complex legal and financial instructions.
Trusted Partnerships
Ancient Tree Forum
Barcham
Lantra
The Areas of Professional Competency (APC) represent the eight technical disciplines governed by CAS. Every Professional Member is independently vetted against these specific categories to ensure high-level technical accuracy.
CAS members are vetted specifically for the skills they promote. Our mandate for Bond Solon training ensures evidence is authoritative and defensible for legal and financial instructions.
It confirms a consultant has passed rigorous peer-review and is qualified to display the CAS Professional logo alongside their vetted technical competencies.
Status requires a rigorous assessment of your technical reporting against national standards to ensure your output meets the evidentiary requirements demanded by the industry.
Yes. The Society welcomes practitioners regardless of employment status, provided their consultancy work meets our technical and ethical standards.
Membership fees of £80 for Associate or £125 for Professional status (+VAT) are payable annually. Invoices are issued upon successful application or renewal.
Professional
Assistance
For all technical inquiries, membership applications, or directory support, please visit our central communication portal to reach the Society's administrative team.
