Classpot

International School of London

Hounslow, W3 8LGAll-throughAges 3–18MixedPrivate

About International School of London

International School of London is an independent day school in Hounslow, London, for pupils aged 3 to 18 for boys and girls. GIAS records 298 pupils on roll and a published capacity of 600.

Figures can refer to different reporting periods. Check the date and source shown beside each section. How Classpot uses published data.

GIAS school facts

Official identity and contact facts; operational fees and services appear only when separately reviewed.

Age range
3–18
Education stages
Early years, Primary, Secondary, Sixth form
Gender
Mixed
Pupils on roll
298
Published capacity
600
Inspectorate
Ofsted inspection regime
Day-school evidence
No boarders; Does not have boarders
Area classification
Urban: Nearer to a major town or city
Published admissions policy
Non-selective
Address
139 Gunnersbury Avenue, London, Hounslow, W3 8LG
Telephone
02089925823
School website
Visit official website

Source: GIAS establishment record · published 20/08/2026

Pupils and staffing

Official figures for 2025/26.

Pupils
298
Girls / boys
140 / 158
Teachers (headcount)
110
Teachers (FTE)
91.5
Pupils per teacher FTE — not class size
3.3
Area classification
Urban: Nearer to a major town or city
Published admissions policy
Non-selective

Source: official publication (04/06/2026) · official publication (04/06/2026)

Ofsted-inspected independent school

Older independent schools inspection framework (OEIF). This is separate from ISI and from state-school overall ratings.

Inspection
Independent School standard inspection
Inspection date
22/11/2023
Overall outcome
2
ISS compliance
All standards Met
Safeguarding
Yes

Ofsted provider page

Source: official publication (30/04/2026)

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