“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

Noise in the Planning Process

Most of our work is allied in some way to the planning process and Cass Allen have extensive experience in assisting clients negotiate what can be a confusing and occasionally frustrating part of the process.

The starting point for planning work is generally some form of survey to establish existing baseline conditions. Once these are known then the noise impact of, or on, the proposed development is calculated and mitigation measures are discussed with the planning team. The end result is an acoustically viable scheme that is submitted to the planning authority and which is sufficiently robust to be defensible at planning appeal if necessary.

Our work often involves negotiating acceptable acoustic criteria with the planning authority prior to submission. These criteria will typically form future planning conditions. Once planning permission has been secured we then enter the detailed design phase, which will provide the information necessary to discharge the planning conditions.

Residential Led Mixed-Use Development – South Quay Plaza

Client: Berkeley Homes (South East London) Ltd
Planning Consultants: GVA
Mechanical Engineers: Gillespies
Architect: Fosters and Partners

Scope: Cass Allen Associates was instructed by Berkeley Homes to undertake a formal Environmental Impact Assessment as part of the redevelopment and revitalisation of South Quay Plaza in Docklands.

Two commercial structures were replaced with residential towers of 46 and 73 storeys with ground floors housing cafes, restaurants, bars and other leisure uses. The site was acoustically complex due to noise generated by the DLR running immediately to the south of the site.

Cass Allen’s role was to prepare the Noise and Vibration chapter of the EIA, covering: internal noise levels inside the finished development and noise due to construction, traffic and plant. We then moved on to detailed acoustic design for the construction phase.

Environmental Impact Assessment – Wind Farm, Suffolk

Client: BT plc
Planning Consultants: DLP Planning

Scope: To assist with achieving planning permission for a wind farm in rural Suffolk. This site forms part of BT’s Wind for Change project and will, when complete, consist of six 2MW turbines on 80m high towers. Our role was to carry out extensive surveys and 3D modelling work and then prepare the noise chapter of the Environmental Impact Statement.

One Tower Bridge – London

Client: Berkeley Homes (SE London)
Architects: Squire & Partners/Peter Taylor Associates
Mechanical Consultants: Meinhardt

Scope: We have been advising Berkeley Homes (Capital) on their prestigious One Tower Bridge development. Nestling between City Hall and Tower Bridge, the development consists of nine blocks of residential, commercial and retail space. Our role includes negotiating planning conditions with the council, discharging noise-related planning conditions and designing the internal acoustics of all of the blocks.

Ocean Village – Southampton

Client: Bouygues UK
Architects: HGP Architects

Scope: Cass Allen has been instructed by Bouygues UK to provide acoustic design advice for this flag ship development at Southampton’s Ocean Village Marina.

The development adds a new residential-led building and new hotel building adjacent to Bouygues UK’s Admiral’s Quay development at the marina.

The work we are undertaking is primarily to assist with the discharge of noise-related planning conditions. However, we are also providing advice to help Bouygues UK deliver high quality acoustic environments for the future building users.

As part of the work, a detailed 3D computer noise model of the development has been utilised as shown in the image to the right.

New Sainsbury’s Supermarket – Milton Keynes

Client: Frontier Estates
Planning Consultants: Savills

Scope: To assist with achieving planning permission for a new retail store in Milton Keynes. Of particular concern to the council was the effect of night-time deliveries on local residents. This was addressed through 3D noise modelling showing that the proposed acoustic barriers around the service yard would reduce noise to acceptable levels. Other concerns related to traffic flows, plant noise and car-park noise was also addressed.

Rooftop Plant Replacement for Data Centre – Horsham

Client: IBM
Architects: HGP Architects
Planning Consultants: BNP Paribas Real Estate

Scope: To assist with achieving planning permission for the replacement of rooptop cooling plant and the introduction of additional emergency generators.

We carried out a series of surveys at the site to establish existing noise emissions and ambient noise levels. We then used 3D noise modelling to demonstrate to the Council’s satisfaction that noise emissions could be adequately controlled via planning conditions. The photograph shows the existing emergency generator building at the site.

Residential Development – Limeharbour, London

Client: Telford Homes Plc
Architects: TP Bennett LLP

Scope: Telford Homes instructed Cass Allen to carry out an Environmental Impact Assessment for a 28-storey residential building in the London Borough of Tower Hamlets.

The main acoustic consideration was the noise impact from the Docklands Light Railway running next to the building.

Using 3D environmental noise modelling software, Cass Allen has advised on the appropriate acoustic design measures to achieve planning permission for Telford Homes and acceptable noise levels for future residents.

Residential Led Mixed-Use Development – Colliers Wood

Client: Quadrant Construction
Architects: Alan Camp Architects

Scope: Quadrant Construction has instructed Cass Allen Associates to provide acoustical advice throughout the design of this mixed-use development in the London Borough of Merton.

Cass Allen will provide consultancy services from the initial planning stage through to post-completion testing in order to achieve Code for Sustainable Homes credits for the residential aspect of the development and BREEAM credits for the commercial units.

Advanced 3D modelling of the site and surrounding noise sources will be used to predict the spread of noise around the site and to aid in the acoustic design of the external facades.

Residential Development – New Cross, London

Client: Concentra / MacDonald Egan
Architects: TP Bennett

Scope: To design the building envelope of this combined new-build/refurbishment scheme to achieve planning noise and vibration limits. This was complicated by the proximity of the site to tube and train lines. We also carried out an initial environmental noise assessment in order to achieve planning permission and detailed design of the internal partitions to achieve Part E of the Building Regulations. Subsequent pre-completion testing demonstrated that all design criteria had been achieved.

Residential & Commercial Development – Watford

Client: Barratt Homes North London
Architects: Architectus

Scope: To design the building envelope and internal partitions to achieve planning noise limits and Part E of the Building Regulations on a large mixed-use development in Watford. The site is adjacent to the busy Watford ring-road and so high performance glazing and ventilation systems were required. Pre-completion tests demonstrated that the acoustic design was successful.

Residential Development – Harlow

Client: Barratt Homes
Architects: Architectus
Planning Consultants: Bidwells

Scope: To carry out an environmental noise assessment and acoustic design study to Part E of the Building Regulations on a 750 unit residential scheme in Harlow. The site is adjacent to a main road and a 24-hour supermarket and so high performance glazing and ventilation systems were required on some of the units. Pre-completion tests demonstrated that the acoustic design was successful. The top photo shows the development approximately 30% complete.




Environmental Impact Assessment – Bishops Stortford

Client: Barratt Homes
Architects: Chetwoods
Planning Consultants: DPP

Scope: to prepare the noise chapter of the Environmental Noise Assessment for the proposed redevelopment of the disused goods yard in the centre of Bishops Stortford.

The development was of such a size that a full EIA was required and included 750 dwellings, retail and commercial space, a hotel, a train and bus station/interchange, a dual carriageway and a dedicated power station. We carried out a series of noise surveys to establish the baseline noise conditions and then detailed 3D modelling to predict the noise impact of the development on the town centre. The picture shows part of the noise modelling for emissions from the new dual carriageway running through the site.

Mixed-use retail park and residential development – Gloucester

Client: Wakemans / Frontier Estates
Architects: Powell Dobson

Scope: We advised Wakemans on securing planning permission for a mixed-use retail and residential development in Gloucester. This involved an extension to a Tesco 24hr superstore with residential above together with several smaller retail uses. Of key concern to the council was noise transmission through the floor from the retail uses to the flats and the effect of deliveries and plant noise on the new and existing residents.

Mixed Use Development – Greenwich, London

Client: Ampurius Nu Homes
Architects: Squire & Partners
Project Managers: Barrie Tankel Partnership
Planning Consultants: Savills

Scope: To advise on noise matters associated with the new Creekside Village development in Greenwich. Of particular concern was a working wharf close to the Eastern edge of the development. The wharf was protected by government statute and could generate noise at any time of day or night since operations are controlled by the tides. We carried out surveys and 3D modelling together with facade design of the residential towers to demonstrate that acceptable noise levels will be achieved inside the finished development.

Large-Scale Store Expansion

Client: Wing Yip
Architects: David Futter Associates

Scope: Cass Allen carried out a noise impact assessment for this proposed large store expansion for Wing Yip, supplier of Oriental ingredients. Key matters to be assessed were noise from fixed mechanical plant and noise from car park and deliveries areas.

A 3D noise model of the development was prepared to calculate noise emissions from the site with and without the expansion. The modelling showed that noise levels at surrounding receptors would actually reduce due to the intelligent design of the expansion. This project showcased the benefits that 3D noise modelling can bring to projects and planning applications.

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.

Proposed Residential Scheme Near To A Waste Transfer Site

Client: Sworders

Scope: Cass Allen Associates was instructed by Sworders to assess the acoustical suitability of a proposed residential development on the Land South of Tanners Way, Hunsdon.

A waste transfer yard is located to the south of the proposed development and Cass Allen carried out detailed assessments, with respect to noise emissions from this yard, under the recently revised BS4142.

Manufacturing Facility and Headquarters – Milton Keynes

Client: Niftylifts
Architects: q2 Architects
Project Managers: Goring Berry
Planning Consultants: Bidwells

Scope: To assist with achieving planning permission for Niftylift’s proposed new UK manufacturing and office headquarters. The council were concerned that noise from deliveries, the manufacturing processes and associated wind turbine might disturb existing residents close to the site and future residents of a planned retirement village.

We carried out a series of surveys at the proposed site and at Niftylift’s existing manufacturing plants and were able to demonstrate to the Council’s satisfaction that noise emissions could be adequately controlled via planning conditions. The picture shows one of the initial surveys carried out to provide baseline noise data for the 3D computer model.

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.