London City Airport implements one of the most generous sound insulation schemes in the UK. Since 2009 over 1800 properties have benefited from associated treatments funded by the airport.

The Airport now operates an improved three tier Sound Insulation Scheme (SIS) offering sound insulation treatment to eligible residential properties which fall within a specific range of noise. Every year the sound contours are re-assessed. This usually results in identification of new eligible properties; these additional properties are published with the airports Annual Performance Report. This report is published in July each year, and can be accessed here

If your property becomes eligible you will automatically be contacted by the Airport by letter informing you accordingly in how you can benefit from this scheme. If you have recently purchased or rented a property which you believe is eligible and has not been treated, please contact us at sound.insulation@londoncityairport.com. In your email, please clearly state:

  • Your full address, including house/flat number, road name, postcode
  • Your relationship to the property (tenant, leaseholder or freeholder)
  • A contact number
  • If you are not the freeholder for the property, please provide contact details for either the freeholder or the managing agent of the property. We will require permission from both the freeholder and leaseholder of the property prior to works commencing.

Properties are not eligible for treatment if planning permission was granted (and the property built) after 27th April 2016. Similarly, if the property was required through its planning permission to have an acoustic standard equal or greater to that which London City Airport (LCY) are offering then we are unfortunately unable to offer anything to improve the sound insulation of your property.

The sound insulation works involve the treatment of habitable rooms (defined as bedrooms, dining rooms, living rooms and kitchen diners within eligible dwellings) to upgrade eligible external windows and doors. The scheme also provides the option of acoustic ventilation in accordance with the sound insulation standards given in the Noise Insulation Regulations. Previously treated properties are inspected every 10 years.

Please note that if you live in a property but there is a separate freeholder and/or leaseholder, LCY will require permission to be granted from these parties before the works can commence which can take some time.

Tier 1

Tier 1 covers the widest geographical area. Properties within the 57 dB LAeq,16h contour (Tier 1) are eligible for works to achieve an average sound reduction of not less than 25 dB. Properties with double glazed windows will already meet this acoustic standard. Properties with single glazing are offered 100% of the costs of secondary glazing or 100% of the costs of thermal double glazing. The eligibility daytime noise contour level of 57 dB LAeq,16h is more stringent than that used at other UK airports. Some local homes are not eligible for Tier 1 works as they were built inside the airport’s noise contours after particular dates when the growth of the airport and its noise impact would have been known by developers. Partly as a result of a higher standard of glazing required under Building Regulations and partly as a result of planning conditions attached to the relevant planning permissions, those developers were required to install adequate sound insulation during construction of the property.

Intermediate Tier

As part of the CADP permission, an additional intermediate tier (Tier 3) was introduced within the 2017 APR for properties within the 63 dB LAeq,16h noise contour. Eligible properties will be offered either:

  • Option 1: Secondary glazing and sound attenuating ventilators, with the installation managed by LCY; or

  • Option 2: £3,000 (index linked) contribution towards the cost of installing high acoustic performance double glazing and sound attenuating ventilators, with the installation managed by the property owner, or resident with permission from the owner. Please note that if option 2 is chosen, there are specific requirements that the windows need to meet in order to qualify under the Sound Insulation Scheme. If the requirements are satisfied, LCY will pay the contribution after the windows have been installed.

Tier 2

Tier 2 is for properties which are closest to the airport. Eligible properties within the 66 dB LAeq,16h noise contour (Tier 2) are offered a higher standard of noise reduction and, following CADP, the scheme has now been enhanced to provide 100% of the cost of high performance double glazing.

Approximate map showing the areas covered by the Sound Insulation Scheme.



  • Blue – Tier 1
  • Green – Intermediate Tier
  • Red – Tier 2

DISCLAIMER: Please note this schematic map is not a guarantee that your property is eligible to be treated if it falls within the contour. London City Airport will first carry out a survey of the property, and the outcome of this survey will determine whether your property is eligible to be treated under the scheme