The new runway will bring noise and disruption to Sipson but we will work with you to try and minimise its effects. If we get permission we will finish construction as soon as we can. We will also provide noise insulation to all homes that need it.

*This page contains one (1) question located within the “Have your say” section at the bottom of the page.

What happens in Sipson

To make space for the runway and other airport facilities, we need to move the A4 and demolish some buildings, including ten homes on Sipson Close.

As shown on the map below, the A4 Bath Road will be diverted round the north of the runway and Harmondsworth and north and east of Sipson. It will include priority for buses and bicycles and will link to new multi-storey car parks (which we call a parkway) on the east of the M4 Spur and then join up with the existing A4 at Sipson Road.

The new parkway will be delivered in phases following the new runway opening. It will provide shuttle access to the terminals and on to central London and other places by bus, coach, tube and train.

We will also be creating a Green Loop around the airport that passes through Sipson (see below for more details).

There will be new aircraft noise in Sipson. We will be providing noise insulation and ventilation (where needed) to buildings in the village.

Things we’ve changed after listening to you

  • We think we can reduce the new A4 west of Holloway Lane to a wide single carriageway instead of a dual carriageway
  • We have designed the road layout to avoid the Sant Nirankari Bhawan centre
  • Sipson Lane will be retained as a key local link
  • We are providing more detail on the options for the airport boundary
  • The parkway will be built later in the programme and will provide improved access to the terminals
  • The Green Loop responds to requests for better walking and cycling routes


Our property policies

To construct and operate an expanded Heathrow we will need to acquire areas of land which currently include residential, commercial and agricultural properties.

MAP | This map shows the areas within our property compensation zones. For assistance, please contact our community relations team using the contact details on this website.

Compulsory Purchase Zone

This area will need to be acquired for the expansion of Heathrow and is referred to as the Compulsory Purchase Zone. Properties in Longford, Harmondsworth (excluding Zealand Avenue and Pinglestone Close), Sipson and Elbow Meadow in Poyle will be required in 2022. It is anticipated that Zealand Avenue and Pinglestone Close would be required in 2026 but these will be affected by construction from 2022.

Heathrow has developed a discretionary enhanced compensation offer where we will buy eligible properties for the open market value plus a home loss payment of 25%. For homeowners, this will be available via the Home Purchase Bond Scheme.

Our Property Policies Information Paper provides details of our compensation offers and eligibility for the schemes.

Wider Property Offer Zone

The above offer also applies for eligible residential properties in the Wider Property Offer Zone.

Both zones referred to above are shown on the map above.

How we will help

We recognise this could be a difficult time for home owners. Our plan is to provide support through our Home Relocation Support Service, where home owners require additional assistance to move home.

It is our intention to protect the most vulnerable owners. We have introduced an interim Property Hardship Scheme that assists those who have a compelling need to move but who are unable to sell their house on the open market, by selling their property to Heathrow.

Commercial and other property policies

Our interim property policies also include the support that is available for commercial and agricultural land and property owners.

Beyond the Compulsory Purchase Zone

Beyond the Compulsory Purchase Zone there are other areas of land which may be needed for associated infrastructure, environmental mitigation and other uses to facilitate the project. The draft Development Consent Order Limits are the extent of land beyond the Compulsory Purchase Zone where we may need to exercise DCO powers for the construction or operation of the project. There are no residential properties beyond the Compulsory Purchase Zone anticipated to be required for acquisition for the project.

Further information is available in the Property Policies Information Paper.

Register your interest

We are keen to hear from residents who are interested in the Home Purchase Bond Scheme and are considering views as to when homes could be sold to Heathrow. We have sent a Contact Request Form to residents and would like to receive responses during consultation.

We will provide more details of the Home Purchase Bond Scheme, including the intended launch date, as soon as we finalise our interim property policies, which will take account of feedback received and once we have clarity on regulatory policy from the Civil Aviation Authority. You can complete the Contact Request Form online at or can e-mail us at [email protected] to arrange a follow-up with a member of our team.

You can find further information on our compensation offers in our Property Policies Information Paper. We are seeking feedback on the policies as part of this public consultation.

Airport infrastructure

Around Sipson we will need to make changes to airport car parks, hotels and some of your public transport routes.

1) The northern parkway – new car park near Sipson
We need to change how we manage car parking. We propose to create multi-storey car parks closer to main roads to free up space and to reduce traffic on local roads. We propose putting the northern multi-storey car park to the east of the M4 Spur. It will be up to 40m high, about the same as the Holiday Inn near Junction 4 of the M4. We propose to start building it in phases after the runway opens.
2) New public transport & cycle links
From the northern parkway we will provide fast links to the terminals for passengers and local residents. We are designing new cycle paths and walking routes as part of the Green Loop. These will run from West Drayton south into the airport and from Harmondsworth through Sipson and on to Harlington and beyond.
3) New hotels & commercial buildings
We need to move some hotels to make the space for the runway. We also need new hotels for the increase in passengers and airline crews. We propose putting them in places with good access to the terminals. This means close to the northern parkway and the Emirates Roundabout.
Map of airport infrastructure

Green space around the village

Improvements to the landscape aim to create a green setting to Sipson that contributes to the area and enhances the village centre.

At the airport boundary 5m high grass bunds and public open space reduce noise and visual effects. The bunds could be used as part of the Green Loop providing views into the airport from the top. ‘Play on the way’ features and the Green Loop connect to Harmondsworth and Harlington on pedestrian/cycle only routes.

The landscape will help improve the setting of heritage assets and increase the green infrastructure and sports and recreation provision.

To the north of the village the M4 will be screened by trees creating the wildlife corridor.

Green loop
Boost recreation and healthy living through recreational walking and cycling connecting communities and important green spaces
Change for habitat sites
Enhance corridors for wildlife and biodiversity and strengthen the network through green infrastructure
Protection and enhancement of Sipson Recreation Grounds/Parkland and Community Centre
Improving Sipson Lane
Increase opportunities for recreation and healthy living, creating open space for walking, cycling and play
Balancing ponds
Creation of flood storage areas to prevent flooding, incorporating wetlands and ponds for habitat improvement
Village setting
Noise and visual mitigation bunds to reduce effects from airport activity
Heathrow's green space proposals for your area
1) Enhanced Sipson open space with upgraded footpaths and links to the wider area. 2) Reprovided public open space. 3) European Protected Species corridor. 4) Additional areas for biodiversity. 5) Sipson recreation ground.

Airport boundary

We have some options for how we design the new boundary of the airport. It needs to be at least three metres high and have a three-metre security zone on each side but it can be different in places around the airport.

In other places it may be necessary to have a taller boundary to help minimise noise and visual intrusion. Where possible we will incorporate landscape planting to soften its appearance.

Around the airport boundary in the vicinity of Sipson village, it is likely to be up to 5m to 7m in height depending on the position of the new runway and taxiways.

Illustrative sections of the airport boundary
Airport boundary options
These images show the sort of things we could put between the airport boundary and Sipson at the points marked A, B and C.


Expanding Heathrow is more than building a new runway – we also need to build facilities for passengers, make changes to roads and car parks, and relocate some of the existing airport infrastructure.

Over the past two years we have engaged with and considered the views of over 1,000 stakeholders and our local community to help develop our preferred scheme. Over time, our new runway will increase our flights from 480,000 to just over 750,000 per year. About 80 million people fly with us each year today. This will increase to about 142 million. We will also double the amount of cargo we can handle.

As part of our application to expand Heathrow, we propose that some of the extra flights, which could be up to 25,000 additional flights per year, are introduced early on our existing two runways prior to our proposed third runway being brought into operation.

The map below shows the key features of the new airport when we have finished building. On the following pages we show the steps we will take to get there.

We want to finish the runway as soon as possible. If we get permission, we are aiming to complete it by the end of 2026. When the runway is open we will have finished most of the work closest to communities. Most work after that will be inside the new airport boundary. The main works outside the new airport boundary will be to Stanwell Moor Junction, the southern parkway, and the northern parkway.

Local construction impacts

The images below show anticipated construction impacts at different times. For more information on each period, please click on the expandable sections below.

Early Construction
Peak Construction (2023-2024)

Early construction

  • Preparation will begin for the sites north and south of Harmondsworth Lane. These include a borrow pit and a stockpile site linked by a dedicated construction road. The road will have a bridge over Harmondsworth Lane to avoid impacts for local traffic.
  • Fencing, landscaping and stockpiles will be installed around all construction sites to reduce the impact on the community.
  • A construction support site will be established on Holloway Lane, to the east of Harmondsworth Road. This facility will include workforce welfare facilities, site offices and temporary infrastructure for caravans for some of the workforce.
  • Principal access to the site will be off the M4 Junction 4 via Holloway Lane, to avoid the other local roads in and around Harmondsworth and Sipson.
  • The borrow pit will be prepared with an engineered lining to contain the waste and isolate it from the surrounding area. We’re developing a strategy for mitigating odours during these works.

Peak Construction (2023-2024)

  • Earthworks around Harmondsworth and Sipson will reach their peak in 2023 as work on the main site progresses. This will include excavation of the existing landfill site to the west of Sipson.
  • There will be piling in the landfill for the foundations of the new runway and taxiways.
  • Construction traffic for the northern section of the main site will arrive via the A3044 and then use internal construction roads within the site boundary. We’ll work with the community to reduce the impact where possible by avoiding peak times and won’t permit HGVs to access village centres and high streets. We’ll schedule working patterns, including the use of roads, to be sympathetic to local residents.
  • We’ll start construction on the new A4 which will run to the north and west of Harmondsworth and to the northeast of Sipson. Additional noise and visual boundaries will be installed to reduce the impact on residents and the local community.
  • The construction support sites along the existing A4 will be fully operational. These may operate 24/7.
  • A new channel will be completed for the Duke of Northumberland’s River to the east of Saxon Way.


  • Earthworks around Harmondsworth and Sipson will largely be complete by this stage and final construction elements will be within the airport boundary.
  • We’ll be in the final stages of construction of the runway, taxiways, other facilities and airside roads.
  • Stockpile areas to the north of Harmondsworth Lane will be cleared and reinstated back to their original use.
  • The new A4 will be complete and open to the public.
  • Around the exterior of the site we’ll remove temporary construction materials and install new permanent landscaping.
  • Operational testing of the new runway will commence once airfield construction around Harmondsworth and Sipson is complete.

Changes to roads and traffic

Changes to roads

To make space for the runway we will need to divert the A4 and close Hatch Lane. We are doing lots of analysis to plan new or diverted routes and to minimise disruption in the local area.

The new A4 will come from Colnbrook, over the M25, past Saxon Way and to the north of Harmondsworth. It will then head round the north of Sipson and across the M4 spur where it meets the new northern parkway. It is then routed southwards, running to the east of the M4 spur. The southern end of Sipson Road will link to the new A4 via a new junction. The new A4 will then re-join its old route to the east of the Emirates Roundabout.

Our proposals allow for it to be a dual carriageway, but we currently believe a single carriageway will be sufficient for the section west of Sipson. North and east of Sipson it is likely to be a dual carriageway. We will carry out further analysis before we decide this. Bus and cycle priority will be provided along this route.

Map of changed roads
Please see the next two images for indicative images of the marked locations.
1) Diverted Bath Road Dual Carriageway
2) Sipson in relation to the diverted Bath Road (A4) & M4 Spur

Changes to traffic

While we do not expect the expanded airport to attract more traffic, there may still be localised increases and decreases. While the airport is being built there will also be construction traffic on some roads connecting the airport to the strategic road network.

The maps below give a preliminary indication of the possible changes to traffic levels in 2022 (during the construction phase), and in 2035 (nine years after we expect the runway to open). These forecasts will be reviewed and updated before we formally apply for consent to expand the airport.

Your responses to this consultation will help us to understand how these potential changes would affect you. There are a range of measures we could use to address any specific concerns. These range from improved signage or changes to junction layouts to measures to promote the use of public transport and encourage the more efficient use of cars.

Changes to traffic - 2022
Construction traffic supporting the expansion of Heathrow is expected to be highest in late 2022/early 2023, just prior to the expected opening of the proposed construction rail link. Traffic flows on Holloway Lane (A3044) would be expected to increase in 2022, as this is being considered as one of the main access routes for the construction site. We do not expect any substantial increases in traffic on other local roads through and around Sipson as a result of expansion in 2022.
Changes to traffic - 2035
Results of preliminary transport modelling indicate that in 2035, once the expanded airport is fully operational, daily traffic levels could be higher on the M4 spur and Holloway Lane as a result of expansion. Daily traffic flows could be lower on roads through and around Sipson, including Harmondsworth Lane, Sipson Way and Ashby Way.

Air quality – Sipson

The expanded airport will be designed to reduce emissions and our plans include ways to manage:

  • The way that people travel to the airport by
  • increasing the use of public transport.
  • The use of cleaner, more sustainable vehicles.
  • Emissions from older, more polluting cars by introducing a Heathrow Ultra Low Emission Zone to charge these vehicles to access the airport.

During construction, air quality in Sipson may be affected by dust and vehicle emissions.

There may also be odours (smells) when historic landfill sites are dug up. This will be managed to stop odours being given off.

There will be increases in pollutant levels associated with expanding the airport, but these are not considered to be significant. Levels of all pollutants will be within the levels set by the Government to protect health.

The smell of aviation fuel may be noticeable at locations closest to the airport during certain weather conditions.

Due to Sipson’s close proximity to the new runway, there is likely to be a moderate increase in one pollutant (known as nitrogen dioxide) in the village, but this will be within the levels set by the Government to protect health.

For more detail on air quality, please see Local overview – Air quality.

Noise in Sipson

A larger Heathrow may mean some local communities will hear more noise from construction activities, from aircraft on the ground and in the air, and from local roads.

We will implement a range of measures to reduce the effects on the local community.

Construction noise

Construction noise will be most noticeable for homes closest to the areas where the major work on roads and construction for the new runway will take place. These are described in the “How we will build it” section.

This noise may be noticed at any time of day or night affecting homes and community buildings such as Heathrow Primary School.

As described earlier in the document, all our construction activities will follow a ‘Code of Construction Practice’ to help manage noise.

We will provide insulation to reduce noise impacts for homes and community buildings where it is needed. In some instances, Heathrow will also introduce a Temporary Home Relocation Scheme for those most impacted by short term construction noise.

More information on insulation and temporary re-housing is available in the Noise Insulation Policy.

Aircraft noise

Sipson does not currently have flights overhead but noise from the airport can be heard in the village.

The new runway will mean much more noise from planes landing and taking off directly over the community of Sipson. Because the eastern end of the new runway will be within metres of Sipson, some homes closest to it will experience very high levels of aircraft noise. We will reduce this inside houses by providing noise insulation.

Ground noise

There will also be noise on the ground from aircraft moving around the airport. Noise may also be noticeable when aircraft are serviced.

To reduce this noise, we are proposing to build noise barriers around the airport (see airport boundary section).

Sipson will benefit from lower road noise as a result of forecast reduced traffic level on Sipson Road, Harmondsworth Lane, Bath Road and the Northern Perimeter Road.

Reducing noise effects

We have a number of proposals and plans in place to reduce these noise effects, which are described within Local overview – Reducing noise effects.

We will offer noise insulation to eligible local residents. Insulation will include things like improved double or secondary glazing, ceiling over-boarding, external doors and where needed roof ventilation.

Without proper insulation around 65 homes in Sipson (closest to the end of the new runway) would experience levels of aircraft noise at night which are considered unacceptable because of the impact on sleep and health.

To prevent this, we are proposing that Heathrow insulates these properties. Where permission is not given, homes could still be protected by noise insulation through compulsory powers.

We will provide noise insulation for eligible community buildings that are likely to be affected by noise in Sipson.

Further information

For more detailed information on noise see the main consultation document and the Preliminary Environmental Information Report, Volume 1, Chapter 17: Noise and Vibration, Section 17.11.

Runway use to control noise

How we run our three-runway airport in the future will be key to controlling aircraft noise in local communities. Alternating runways will provide respite from aircraft noise.

Choosing which runway is being used for take off and landing and when aircraft arrive and depart during the night are the main ways we can control noise:

Runway alternation

We are proposing that we change how we use the runways at either 2pm or 3pm everyday. The runway alternation patterns will repeat every four days (so day five will have the same pattern as day one). See image below.

Night flights

We propose to introduce a ban on scheduled night flights of 6.5 hours between 11pm and 5:30am.

Our proposals ensure that, in normal operations, Sipson can expect at least 7 hours when aircraft will not be flying overhead between 10pm and 7am every night.

Also, if you are overflown in the late evening (after 11pm) you will not be overflown in the morning (before 6am).

What will this be like in Sipson?

The illustration below shows what this would mean in the future, compared to today, for daytime and night-time respite in Sipson over a 4 day period. The green colours show periods of respite, and the orange colours show periods of direct overflight.

When will Sipson have noise overhead?

Whether Sipson gets noise from planes overhead will depend on the direction of the aircraft (heading east or west) and which “mode” the runway is being used in. The modes are landings only, departures only or “mixed-mode” (both landings and departures).

For example, when aircraft are taking off to the west, Sipson will not get noise overhead when the new runway is being used for departures but will get noise overhead when it is being used for landings or in mixed mode.

When aircraft are taking off to the east, Sipson will not get noise overhead when the new runway is being used for arrivals, but will get noise overhead when it is being used for departures or in mixed mode.

When there is no noise overhead, there will still be noise from aircraft on the ground and from aircraft using the existing runways. The Sipson community will hear noise from aircraft engines as they move from the terminals to the runway for departure. The engine noise will increase as the pilot accelerates away down the runway to take off but there would be no planes overhead.

For more information on our proposals please see Future Runway Operations and the Future Runway Operations document.

Events and more information

Please also see the related local area overview pages for more information:

  • During this consultation we are also hosting 43 events. To find an event near you, visit Events.

Have your say

Our Heathrow Expansion and Your Area documents set out our development proposals, their potential effects and how we propose to reduce them.

View next topic in this group: