We provide targeted residential noise surveys and exposure assessments to support planning and design for noise-sensitive developments.
Our consultants combine technical expertise with planning insight to deliver clear, policy-aligned advice and practical mitigation strategies.
Our outputs are robust, defensible and suitable for submission to Local Planning Authorities, enabling efficient progression through planning while supporting the delivery of high-quality living environments.
BS 8233 Residential Noise Assessment
A BS 8233 assessment evaluates the impact of external noise on internal residential environments. It is typically required where new housing or other noise-sensitive uses are proposed in areas influenced by transport, commercial or industrial noise sources.
The aim is to ensure that internal noise levels meet recognised guidance, providing appropriate levels of comfort and amenity for future occupants. This includes identifying mitigation measures such as façade performance, glazing specifications and ventilation strategies.
When is a Noise Survey Required?
Residential noise surveys are commonly required where a development introduces noise-sensitive receptors into an existing environment. This includes:
- New residential developments or conversions
- Mixed-use schemes incorporating residential elements
- Schemes located near significant noise sources
Typical external influences include:
- Road and rail infrastructure
- Commercial and industrial uses (e.g. service yards, workshops)
- Leisure and entertainment venues
Early assessment enables acoustic considerations to be integrated into design, reducing planning risk and avoiding the need for late-stage mitigation.
Regulatory Context
Assessments are undertaken in accordance with relevant guidance, including:
- BS 8233:2014 – Sound insulation and noise reduction for buildings
- Professional Practice Guidance (ProPG): Planning & Noise
- National Planning Policy Framework (NPPF)
- Applicable local planning policies and Environmental Health requirements
- WHO guidelines on community noise, where relevant
Typical internal targets for residential accommodation include:
- 35 dB LAeq (daytime) for living spaces
- 30 dB LAeq (night-time) for bedrooms
- 45 dB LAmax (night-time) for individual noise events
Our Approach
Our methodology is tailored to each project and typically includes:
- Baseline Noise Survey – We undertake environmental noise monitoring to establish the existing acoustic baseline, capturing both daytime and night-time conditions. This may include long-term unattended monitoring alongside attended surveys to identify dominant sources.
- Assessment and Analysis – Survey data is analysed in accordance with BS 8233 and relevant guidance to assess the impact of external noise on internal spaces.
- Design Input and Mitigation – We develop proportionate, design-led mitigation strategies, including façade and glazing specifications, ventilation solutions and layout optimisation, to achieve target noise levels.
- Reporting and Planning Support – We prepare clear, technical reports suitable for planning submission, setting out methodology, findings and recommended measures. We also engage with Local Authorities and stakeholders to support application progression and discharge of conditions.
By integrating acoustic considerations early and adopting a design-led approach, we support the delivery of residential schemes that are compliant, viable and provide high-quality occupant environments.
