“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

Fiona Allen

Fiona Allen - Director
Direct Dial: 01234 834862 / Email

Fiona holds an MA in Modern Languages from Oxford University and post-graduate qualifications from Cambridge University. After her studies Fiona embarked on a long and successful career in Human Resources working exclusively for professional firms. She has been HR Director of several City Law firms, before moving out of London to become HR Director for a nationwide planning firm.

At Cass Allen, Fiona looks after recruitment and staff, as well as handling some client matters that are not related to projects or finance. Her main interests outside work are the theatre, singing and Nordic walking.

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.