Airspace Surveyor in Hounslow

An airspace development creates new homes by building above an existing roof. Hounslow sees rooftop schemes on the post-war estates across central Hounslow and Feltham alongside upward extensions on the Edwardian terraces and 1930s semis across Chiswick and Isleworth. Our role covers the existing residents below the development, the schedules of condition that record each flat before construction starts, and the day-to-day liaison through the build.

Airspace Projects in Hounslow

Hounslow's residential stock is unusually mixed for an outer London borough. Chiswick at the inner end of the borough carries Edwardian and Victorian terraces and mansion blocks in a more inner-London character, with conservation areas covering much of the area. Brentford and Isleworth carry mixed Edwardian and post-war housing with regeneration zones along the Thames. Central Hounslow, Feltham, Bedfont, and Hanworth carry significant post-war and 1960s estates with mid-rise residential blocks suited to rooftop schemes. Heston and Cranford run more heavily to 1930s suburban housing where upward extensions on individual homes are common.

We specialise in chartered surveying on dense urban sites where rooftop and upward extension schemes are most common. The practice is RICS regulated with over 30 years of combined residential extension and rooftop experience. Party wall services are nearly always involved given the borough's dense building pattern in the inner parts.

Airspace Developments

As well as providing daylight, sunlight and rights of light advice, our role would be to make contact with the occupants of the existing building to establish any concerns regarding the development. We will work closely with the professional team to identify the initial questions and look at how these can be addressed.

It is our experience that maintaining the same point of contact for the duration of the project offers the existing occupants’ reassurance and continuity.

Services Provided

  • Make initial contact with existing occupants.

  • Attend meetings to discuss any concerns of the existing occupants.

  • Recording Schedules of Condition of the flats below the proposed units.

  • Act as a liaison between the developer and occupants throughout the project.

  • Assist in resolving any issues that may arise such as car parking, site setup etc.

What does our airspace service in Hounslow cover?

On rooftop additions to Hounslow's post-war estates across central Hounslow, Feltham, and Bedfont, the existing occupants liaison role is central. We make initial contact with each leaseholder below the proposed units, attend meetings to discuss concerns, prepare Schedules of Condition for the flats directly below the new units, and act as the named point of contact through construction. Day-to-day issues, scaffolding placement, deliveries, parking restrictions, access, get handled as they arise.

On rooftop additions to mansion blocks in Chiswick, and on homeowner-led upward extensions across the borough's terraced and suburban streets, the focus may shift to the Party Wall etc. Act 1996, neighbour relations, and protection of the existing structure during construction. Airspace development advice covers feasibility on the more complex schemes, particularly where conservation areas in Chiswick limit options.

Airspace work in Hounslow typically sits alongside daylight and sunlight, rights of light, and party wall workstreams on the same scheme. The same surveyor stays on the project from instruction to handover.

Over the past four years, CHP have worked very successfully with us in their capacity as party wall surveyors. Through his calm, sensible approach and excellent communication skills James Crowley, in particular, gained the trust and confidence of the entire team and stakeholders. Looking forward to working with CHP again.”

- Clare Goggin, Jackson Coles

How do airspace developments affect existing residents in Hounslow?

Residents below an airspace development carry the most direct impact: noise during working hours, disruption to access and parking, scaffolding obscuring windows, and concern about damage to their flats. In Hounslow's mix of inner-character mansion blocks in Chiswick and post-war estates across the rest of the borough, those effects vary by site but always need structured management.

Strong liaison and a thorough Schedule of Condition deal with most of this before it starts. Residents get one named contact, the developer gets a structured process for concerns raised, and the Schedule provides documented evidence if a damage claim arises later. Planning sits with the London Borough of Hounslow, and rights of light assessments often run in parallel where new height affects surrounding properties.

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Head Office
2-6 Boundary Row
London, SE1 8HP

Essex Office
2-6 Boundary Row
London, SE1 8HP


020 3714 4090

Get in touch.

Head Office
2-6 Boundary Row
London, SE1 8HP

Essex Office
2nd Floor, 10 High Street
Wickford, Essex
SS12 9AZ


020 3714 4090
enquiries@chpsurveyors.com