We advise some of the largest housebuilders and housing associations on how to achieve acoustics requirements in the most cost-effective manner.

We provide acoustics consultancy services for the whole life-cycle of a residential-led development from pre-purchase and planning through the design, construction and testing phases.

We assist in the design and assessment of:

  • Early stage feasibility studies
  • Planning applications and conditions
  • External noise ingress and facade design
  • Internal acoustic design and pre-completion testing for Building Regulations Part E
  • Compliance with overheating requirements for Building Regulations Part O
  • Mechanical plant noise impact
  • BREEAM/ Employer’s Requirements

Success Stories

9 Millbank, London

Client: St Edward, Berkeley Group

9 Millbank is a landmark Grade II listed address on the banks of the River Thames. Cass Allen delivered the acoustic design and testing from RIBA Stage 3 to completion, including challenging sound insulation design around fragile elements of historic building fabric with important heritage value. The design also incorporated premium resident’s facilities including a spa, cinema, meeting rooms and gym.

The Waldens, Saffron Walden

Client: Chase New Homes

This stunning development is the former Friends’ School, set to offer 96 new homes and leisure facilities in the heart of Saffron Walden. Cass Allen have provided Acoustic Design across the development which includes the conversion of the historic school buildings into apartments, alongside new build houses.

Our design advice will help to ensure the compliance of Building Regulations Part E, and our plant noise assessment will protect the proposed dwellings from swimming pool noise.

Westhorpe Gardens

Client: Hill

Cass Allen were appointed on this development, comprising of 251 residential properties. We took on facade design as well as detailed design of internal walls, floors and associated flanking paths to ensure Building Regulations Part E compliance. Mechanical plant noise design was also required, we provided detailed modelling of the energy centre and air source heat pumps.

This major project has made a significant contribution to affordable new homes in the borough, which were much needed.

1,000 homes at Holloway Prison

Client: London Square

Cass Allen have been instructed to help London Square manage noise impacts from construction works for the redevelopment of the former Holloway Prison in North London.

This had included assisting with negotiating and satisfying noise related targets imposed by Islington Council. This exciting scheme will provide ~1,000 new homes with 60% to be genuinely affordable. The Scheme also includes a new ‘Women’s Building’, which will provide much needed services and support to local women as well as acknowledging the historical suffering of former women inmates at the prison.

Wolsey Grange Phase 2, Ipswich

Client: Taylor Wimpey
Planning Consultants: Boyer

This large scale Taylor Wimpey greenfield development gained outline planning approval recently.

Cass Allen assisted in the works, including bund design to protect dwellings from the noise of the busy A14, adjacent to the site. The new community will deliver up to 750 new homes set amidst a unique landscape setting, will bring forward the new ‘Green Valley’ Country Park and provide a network of public open spaces.


Juniper House, Walthamstow

Client: Hill

Juniper House, located in Walthamstow comprises of 91 news homes for residents. Cass Allen provided acoustic design guidance and testing – completing tests on internal and external wall and floor construction to comply with building regulations Part E and planning conditions.

The impact of ground-bourne vibration from an adjacent railway was also a consideration in the plans, and a plant noise impact assessment was carried out on the scheme’s air source heat pumps.

Red Bank, Manchester - Northern Gateway

Client: FEC

Cass Allen were delighted to work on this significant residential development. We consulted the design team, as well as the local planning authority to establish specific requirements regarding the assessment methodology and prepared a report formalising the acoustic design strategy for each block of the project.

Across the development we carried out noise surveys and outline facade assessments. Through 3D computer noise modelling we were able to predict variation in noise levels across the development and assess predicted noise levels inside habitable rooms of the proposed development.


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Guildford Station Redevelopment - Block E

Client: G&H
Contractor: JJ Rhatigan
Architects: 3Dreid

Cass Allen were appointed to provide detailed acoustic design services on Block E of the Guildford Station Redevelopment project. Block E comprises a block of high-quality residential accommodation above commercial areas adjacent to the Guildford Station and associated railway.

We provided the necessary input to ensure compliance with acoustics-related project ERs, planning conditions and Building Regulations including full acoustic design and testing.


Royal Mint Gardens, London

Client: Midgard Ltd

Cass Allen were appointed the Acoustic Consultants for this complex project in London.

The site is built directly over the top of an existing railway line, with the tunnel running through the development. This is made possible with incredibly high acoustic performance design incorporating anti-vibration bearings and double layer isolated concrete encasement of the railway.

Another acoustic consideration of this development is an elevated DLR line running adjacent to the site boundary.

Sparkle Street, Manchester

Client: Midgard 
Architects: Simpson Haugh

Cass Allen were appointed to support the Sparkle Street 25 storey residential development from RIBA Stage 2 through to completion. We carried out an initial sound survey to identify dominant noise sources along with a detailed vibration survey to determine if vibration levels at the proposed facade location were acceptable. These findings enabled us to produce 3D noise models of the performance of the building fabric, and provide an acoustic design strategy.

Our reports and assessments supported the planning application submitted to the LPA.


Polly's Field Village, Braintree

Client: Hill 

Cass Allen were appointed on the Polly’s Field retirement village development, a 3 storey building comprising of 99 residential units. We reviewed party wall and floor build ups to achieve acoustic standards regarding both airborne and impact sound insulation. We were also involved in the design of the amenity spaces including the gym and the multipurpose hall.

Part E standards were successfully met through assessing internal partitions as well as flanking details.


Brightwell Lakes

Client: Taylor Wimpey East Anglia

Brightwell Lakes is a 2000 home phased development from Taylor Wimpey, Parcel E1 and W1 were approved by East Suffolk Council in December 2022. The first phase will consist of 317 brand-new homes across two sites.

Cass Allen has provided noise assessments for both phases, including a large boundary bund design along the A12 to limit road noise. We also carried out construction monitoring for the site, as well as a primary substation assessment.



Residential Mixed-Use Development in Digbeth, Birmingham – Connaught Square

Client: Seven Capital Plc
Architects: Building Design Group

Cass Allen are appointed by Seven Capital Plc as Acoustic Consultants for their landmark mixed-use development in the heart of Digbeth.

The £220m development will consist of 770 new apartments and over 3,500 sq m of commercial, retail and leisure space…

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North West Cambridge, M1 & M2

Client: Hill 

Cass Allen were appointed on this scheme to provide detailed design assessment of external facades to ensure compliance with the existing agreed noise insulation scheme. We also provided detailed design assessment of mechanical plant systems to ensure acceptable levels of noise were achieved at surrounding noise sensitive receptors, including residential units within the development itself.

Sound insulation design and testing was carried out across the development to demonstrate compliance with Part E building regulations.

Luxury Residential Mixed-Use Development off Broad Street, Birmingham – St Martin’s Place

Client: Seven Capital Plc
Architects: Building Design Group

Cass Allen are appointed by Seven Capital Plc as acoustic consultants for their new luxury residential development in the heart of Birmingham due for completion in 2020.

The scheme consists of 227 apartments and will be fully serviced by the four-star Park Regis Hotel. Residents will have access to their own gymnasium and cinema when the development is completed…

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Moda Hove, Brighton

Client: Midgard

Cass Allen provided detailed acoustic design of external facades to ensure acceptable noise levels were achieved within habitable areas, as well as internal sound insulation design and testing in order to comply with Building Regulations Part E. We also advised on mechanical plant design, and assisted with claiming acoustics-related BREEAM credits.

Hove Central is an urban village consisting of over 824 state-of-the-art apartments to rent in Brighton and Hove. Combined with an abundance of public gardens, flexible workspace to collaborate and create, as well as new shops, cafes, bars and infrastructure. The most ambitious Moda community development to date.

Residential Led Mixed-Use Development, South Quay Plaza

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

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…

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Osiers Road, Wandsworth

Client: Taylor Wimpey (South Thames) Ltd
Structural Engineers: Ridge
Architect: KHA

Cass Allen were the appointed Acoustic Consultants for this challenging project in Wandsworth.

The site is located adjacent to a busy railway line, which is a few metres from the footprint of the building at its closest point. As a result, anti-vibration bearings were required in the design of the structure to protect future residents from ground-borne noise and vibration. The use of the bearings was optimised to minimise project costs and ensure the bearings could be accommodated in the structure…

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One Tower Bridge, London

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

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 a theatre and 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.

Marina Development, Brighton

Client: Midgard
Architects: Acanthus L W Architects
Design Consultants: Whitecode
Mechanical Consultants: Meinhardt

We have been appointed by Midgard to advise on the new Brighton Marina development. This will build a large number of apartments on land reclaimed from the sea and is acoustically complex due to the extensive use of piling near existing buildings.

Residential Tower, Stratford

Client: Telford Homes Plc
Architect: Stockwool

Cass Allen advised Telford Homes Plc on the acoustical design of this 33-storey residential building, accommodating 182 dwellings including an ancillary resident’s gym.

This site is located within a mixed-use area and was acoustically challenging as it sits between Stratford Railway and the Great Eastern Road. Cass Allen advised throughout this project to ensure that the internal noise levels in all habitable rooms achieved local authority criteria.

Apartment Block – Ruskin Square Development, Croydon

Client: Midgard Ltd
Architects: Allford Hall Monaghan Morris

Cass Allen Associates were instructed by Midgard Ltd to assess the acoustic design of this apartment block, which rises from 9 to 20-storeys and is part of the £500m development at Ruskin Square in Croydon.

An Environmental Impact Assessment showed that noise levels at the site were dictated by the adjacent East Croydon railway line and traffic on surrounding roads. Our scope included the acoustic design of the external envelope and also the internal acoustics of the building.

Conversion of Town Hall, Tottenham, London

Client: United House
Architects: BPTW
Planning Consultants: CgMs

To assist with achieving planning permission for the proposed redevelopment of Tottenham Town Hall into mixed commercial and residential uses. The site was complicated by the presence of railway lines at the rear, the busy A10 at the front and a live music venue to the side. However, through detailed acoustic design of the facades and ventilation systems we were able to demonstrate to the Council that suitable noise levels could be achieved inside the development and planning permission was approved.

Alfa Laval, Hounslow

Client: Bellway Homes
Architects: Boon Brown Architects

We have been advising Bellway Homes on the acoustic design of this large residential development at the Alfa Laval site in Hounslow. The site is adjacent to the A4 and a raised section of the M4 and is subject to very high road traffic noise levels. Consequently, high acoustic performance glazing and ventilation was required for the project. 3D noise modelling was carried out to inform the specification of the glazing and ventilation and to ensure that higher performance elements were only specified where strictly required…

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New Waterside Village, Victory Pier, Gillingham

Client: Berkeley First
Architects: A&Q Partnership / AMOS Architecture & Design
Planning Consultants: Barton Willmore Planning

Victory Pier is a new waterside village on the banks of the River Medway comprising of over 800 apartments and townhouses together with restaurants, bars, retail, carehome, hotel and leisure facilities. Our role was to assist with obtaining detailed planning consent through extensive surveys and 3D computer mapping of the site…

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Latest News

Company News
29 Feb 2024

Cass Allen share knowledge at guest lectures

Cass Allen share knowledge at guest lectures. We had the pleasure of visiting the University of Derby and Birmingham City University...

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Company News
21 Feb 2024

Proudly Introducing…

We are delighted to introduce and welcome our newest team members...

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Project News
19 Apr 2023

Part of The Battersea Masterplan

We are proud to be assisting with numerous phases of the very exciting and dynamic developments at Battersea Power Station.

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Company News
05 Jun 2023

Our Air Quality division is expanding!

We are delighted to have to added Air Quality to our array of expertise and celebrate a successful 6 months.

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Project News
28 Feb 2023

Protecting some very important artefacts

We have recently completed an exciting project based at The British Museum.

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