About Jonathan Darnell Engineering Ltd
Your Local Chartered Structural Engineer in Surrey
From initial inspection to final report, we deliver trusted, compliant, and cost-effective structural solutions tailored to every client’s needs.
Our Story
Building on Experience, Designed for Confidence
Jonathan Darnell Engineering Ltd was founded by Jonathan Darnell, a Chartered Structural Engineer with over 40 years of industry experience. Based in Staines-upon-Thames and serving the wider Surrey area, Jonathan’s career has spanned large-scale industrial work, residential renovations, and everything in between.
Jonathan was formerly a partner at the respected engineering firm Price & Myers. He founded his consultancy to offer hands-on, client-focused structural engineering services with a personal touch. Every project is managed with a clear commitment to safety, regulatory compliance, and practical buildability.
40+
100s
Of Projects Approved by Building Control
Fully chartered (MIStructE) and insured (£2M PI cover)
“My goal is to help clients feel confident in their builds — whether that’s supporting a loft conversion or evaluating foundation integrity.” – Jonathan Darnell
Our Process
From Consultation to Calculation — How We Work
Consultation & Site Visit
We begin with a one-on-one conversation — in person or by phone — to understand your goals, answer questions, and assess your structural needs.
Engineering Analysis & Design
We carry out detailed inspections, structural calculations, and design drawings tailored to your property and local Building Control requirements.
Delivery & Ongoing Support
You receive clear, regulation-compliant reports or drawings — ready for submission to planning departments, builders, or legal teams. Need follow-up support? We’re here to assist throughout the build process.
The Goal
Our Mission
Practical Structural Engineering, Made Personal
Our mission is to make structural design straightforward, safe, and stress-free. We offer clear advice, precise calculations, and structural reports you can trust — all while working directly with the person doing the work: Jonathan himself.
We aim to:
- Empower clients with clear, expert advice
- Simplify compliance with building regulations
- Deliver fast, effective structural designs
- Help Surrey homeowners and builders build with confidence
The Outlook
Our Vission
To Be Surrey’s Most Trusted Independent Structural Engineer
We want to be known for honesty, precision, and a friendly, practical approach to engineering. Whether it’s a load-bearing wall removal or a new commercial foundation, we aim to support every project with clarity and care.
Giving Back
Serving Our Local Community
We are proud to support local work for local people. That means working closely with homeowners, developers, and trades across Staines, Ashford, Shepperton, Sunbury, and beyond. Jonathan is especially passionate about helping first-time renovators and self-builders navigate complex structural requirements with patience and professionalism.
Ready to Start Your Project?
Contact Jonathan today to book your free consultation or request a quote.