“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

Entertainment and Leisure

Noise generated by entertainment venues can have a devastating effect on the lives of nearby residents. This is not only due to the high sound levels associated with modern venues, but also due to the acoustic character of emissions – eg the ‘bass beat’ that travels easily through modern building structures and is very noticeable to residents even at relatively low levels.

We have extensive experience in both assessing the likely noise impact of proposed entertainment uses and also helping venues address noise complaints from residents and possible legal action taken by Local Authorities.

New public house developments – throughout UK

Client: J D Wetherspoon / Lloyds No 1 Bars
Architects: Various
M&E Consultants: Various

Scope: We have enjoyed a long relationship with J D Wetherspoon during their years of rapid expansion throughout the UK.

J D Wetherspoon specialize in converting large and often complicated buildings into pubs, which inevitably resulted in many complex planning issues. We have advised on the acoustic ramifications of conversions from many interesting old buildings including theatres, cinemas, churches, many of which have been listed. This places great constraints on what can be done to the building fabric.

The pictures above show the range of new developments, from a new build site in Milton Keynes to a conversion of the old cinema at Llandudno in North Wales. We have advised on over 200 J D Wetherspoon developments, many of which have also required initial concerns regarding noise impact to be overcome either at appeal of as part of planning submissions.

New Leisure Centre – Nottingham

Client: Carillion
Architects: Levitate
Mechanical & Electrical Consultants: BSP

Scope: To advise on achieving good acoustic quality inside this new leisure centre comprising two swimming pools, fitness suite, dance studio, relaxation rooms, cafe and changing facilities. Of particular interest to the end user was to control excessive reverberation inside the pools. Cass Allen carried out detailed computer modelling, which showed that relatively minor and inexpensive modifications to the building design could achieve significant improvements in the final acoustic quality of the project. We then advised on constructional details and compliance with project noise limits throughout the build.

New Performing Arts Centre – London

Client: Allenbuild
Architect: Sprunt Architects

Scope: Cass Allen are advising Allenbuild and Sprunt Architects on the acoustic design of an ambitious project in the heart of Hammersmith. The auditorium will take up the ground and first floors of the building, with five floors of residential units constructed above. To prevent noise and vibration from the auditorium disturbing the new residents, the auditorium is structurally isolated from the residential units at first floor level. The design is further complicated due to high traffic noise levels in the area.

Cellar Multimedia Centre at Stowe House

Client: Stowe Preservation Trust

Scope: Cass Allen Associates was commissioned to give acoustic design advice for an exhibition on behalf of the Stowe Preservation Trust.

This multimedia exhibition is being created in the cellar of Stowe House which is a Grade I listed country house, also home of Stowe School. The exhibition will tell the history of the family and estate using three audio-visual `Talking Portraits’ which will run simultaneously.

The existing cellar had highly acoustically reflective room surfaces and had high reverberation levels. By generating a 3D noise model, Cass Allen designed the speaker placement and required acoustic absorption into the cellar in order to reduce the reverberation levels and achieve optimum listening conditions for visitors of the exhibition.

Anglia Ruskin University – Sports Ground and Pavilion

Client: Bishop Hall Properties Ltd

Scope: Cass Allen was instructed by Bishop Hall Properties Ltd to assess the noise impact for the modernisation of the Anglia Ruskin Sports Ground and Pavilion on Howes Close, Cambridge.

The redeveloped site includes two additional floodlit `all-weather’ hockey and football pitches and a new pavilion with visitors parking.

In accordance with the relevant local and national planning guidance, Cass Allen advised on the acoustic treatments of the artificial pitches and the specification of treatments to reduce noise from ball impacts affecting existing and future residential sensitive receptors in the area.

Leisure Centre Refurbishment & Modernisation

Client: Levitate Architects

Cass Allen has been instructed by Levitate Architects to give acoustic advice for the refurbishment and modernisation of Harvey Hadden Leisure Centre in Nottingham.

Using a 3D computer model system, Cass Allen will calculate acoustic quality to achieve excellent acoustic conditions and to control excessive reverberation within the pool hall which will house a 50-metre swimming pool, viewing area and spectator seating.

The development is currently at design stage with Cass Allen also advising on acceptable sound insulation between key rooms including multi-use activity studios, fitness gym, health suite, sports hall and cafeteria.

Live Music Concerts – Milton Keynes

Client: Easternbreeze

Scope: The close proximity of the stage to nearby dwellings, together with the legendary levels of bass generated by reggae band UB40 caused great concern to the venue, promoter and Local Council. Our role was to to provide real-time feedback of music levels out in the community to the mixing engineer to allow him to control music emissions on stage to comply with the agreed noise criteria. Cass Allen have provided these services on a number of occasions for a wide variety of different musical acts and venues.

Restaurant Conversion – London

Client: Hix Restaurants
Architects: Waugh Thistleton
Planning Consultants: CMA

Scope: The building is listed and located in close proximity to residents. Our role was initially to advise on the feasibility of achieving planning permission in view of Council opposition to this type of use. We carried out sound transmission tests to identify and weaknesses in the building fabric and advised on how excessive reverberation could be reduced whilst retaining the aesthetic of the listed industrial building. Having negotiated suitable planning conditions with the Council, our role was then extended to acoustically design the envelope insulation and mechanical plant so that the planning conditions could be discharged. We also modelled the internal acoustics of the building and specified suitable room treatments to control reverberation and provide a good ambiance for future diners.

The restaurant was opened in May 2012 and judging by the email received from the Lead Architect after the opening night, this balance seems to have been achieved :

Lest I forget, the acoustics in here are near as dammit perfect. Great job. Come for lunch!
(Andrew Waugh, Waugh Thistleton Architects)

New Leisure Centre – Cambridge

Client: Cambridge Leisure
Architects: CMC Architects

Scope: Acoustic design and testing of the acoustic insulation surrounding the 9 screen cinema complex to ensure acceptable levels of noise intrusion into the surrounding health centre and restaurants.

Restaurant – Soho, London

Client: The Orchid Group
M&E Consultants: Beverley Design Group

Scope: To respond to a noise abatement notice served by Westminster City Council relating to noise emissions from rooftop mechanical plant. Cass Allen carried out a series of surveys and computer modelling to abate the nuisance to the Council’s satisfaction whilst still allowing the restaurant to trade without interruption.

Restoration of Cinema – Hoxton, London

Client: The Shoreditch Trust
Architects: Waugh Thistleton
Planning Consultants: CMA Planning

Scope: To assist in gaining planning permission for this restoration of the long-derelict Gaumant Cinema. The scheme includes two screens, an event space, two cafes and offices. Our role included detailed environmental surveys to demonstrate to the Council that the noise impact of the proposal would be acceptable, and also the initial design of the insulation surrounding the cinema screens to demonstrate that local residents would not be disturbed.

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.