Background
Mitie commissioned Anderson Acoustics to conduct a noise impact assessment at Waterloo Industrial Estate, Bidford-on-Avon (B50 4JN). The assessment was required to support a retrospective planning application for the replacement of an existing telecommunications mast and the installation of associated ground-based equipment cabinets.
The site is located near residential properties on Wellington Road, making noise control a key consideration for planning approval.
Challenge
The main challenge was to evaluate whether the noise generated by the newly installed telecommunications equipment would adversely affect the nearest noise-sensitive premises, particularly during the quietest periods of the day. The assessment needed to comply with local authority guidance and the requirements of British Standard 4142 (BS 4142), which sets out methods for rating and assessing industrial and commercial noise in relation to residential environments.
What We Did
- Site Survey & Measurements: We conducted an attended night-time noise survey to capture representative ambient and background noise data at the nearest residential receptors. Measurements were taken using precision sound level meters, ensuring accuracy and reliability;
- Source Analysis: The assessment identified that only one of the new plant items (the Weston cabinet) was producing audible noise. Detailed measurements were taken at 1 meter from the cabinet’s ventilation grille to quantify its sound emissions; other previously consented items were also producing noise. These were included in the assessment to represent a worst-case scenario;
- Noise Modelling: A 3D environmental noise model was developed using CadnaA software, incorporating site topography, building layouts, and plant locations. The model simulated noise propagation to the nearest residential properties, applying worst-case scenario assumptions for robust results;
- Compliance Assessment: The predicted noise levels at the most affected property were compared against the adopted criterion: the rating level of the plant noise should not exceed the measured background noise level (34 dB LAeq,15min at night).
Result
The assessment found that the highest predicted noise level at the nearest residence was 29 dB LAeq,T which is 5 dB below the adopted limit. The noise contribution from the Weston cabinet was even lower, at 20 dB LAeq,T, well within acceptable thresholds. According to BS 4142, this indicates a low impact, and no additional mitigation measures were required.
Our assessment concluded that planning permission should not be refused on noise grounds, supporting Mitie’s application and demonstrating responsible environmental management.
Project Progress
Stratford-On-Avon District Council granted planning permission on 22nd August 2025.
