“Very proactive and extremely helpful, especially with technical queries. I would not hesitate to recommend and will certainly be using them again in the future.”



Under CDM2015 regs we have found CASS ALLEN to exercise a level of professionalism and due diligence which is second to none. We would therefore definitely recommend CASS ALLEN as our preferred acoustic consultant, for all of our projects.’


SF - Taylor Wimpey South Thames

“I was very pleased with their technical knowledge and professional approach when dealing with a very awkward purchaser as well as the local authority.”


JH, Telford Homes

“Cass Allen went above and beyond to help with the Acoustic planning performance and conditions regarding the Greenwich Creekside project…”


LM, Capita plc

“Good comprehensive reports and advice at all design stages. Very flexible and professional, provided attendance at acoustic cladding tests at short notice.”


DF, Berkeley Homes

“Cass Allen have assisted us on a number of our projects. I’ve been impressed with their thorough and professional approach.”


MT, Lark Energy

Patrick Allen - Director
Direct Dial: 01234 834862 / Email

Patrick is a Chartered Engineer (CEng) and Fellow of the Institute of Acoustics (FIOA) who graduated in 1986 in Electroacoustics from the University of Salford. He specialises in architectural acoustics, large-scale planning projects and expert testimony services and is a founding member of the Expert Witness Institute (MEWI).

Patrick holds post-graduate qualifications from the Chartered Institute of Marketing and Cranfield Business School and trained with BBC TV and Radio before joining the Salex Group of Noise Control Companies. He then spent 12 years at Spectrum Acoustics Consultants as Head of Architectural and Building Acoustics before forming Cass Allen in 2000.

He formed Opera Omnia Productions in 1993 to allow him to develop his filmmaking and sound recording interests alongside his acoustics work and the synergy between acoustic design and media production has proved invaluable on many performing arts projects. Patrick is also a director of Hazard Chase Artist Management.

Outside work his main interests are sailing, kayaking and cycling.

Get in touch

We hope you’ve enjoyed browsing our website but if you have any questions feel free to call us to talk through any acoustic issues you may be facing on your projects. The best person who can help with specific queries can be found here.