The Jencks Foundation
To promote the understanding and knowledge of architecture including the expanded field of architecture and the work of Charles Jencks in that field including opening and maintaining a museum in the Grade 1 listed house known as The Cosmic House in Lansdowne Walk, Holland Park, London. To promote research for the public benefit in all aspects of those subjects (and to publish the useful results).
Activities & Mission
To promote the understanding and knowledge of architecture including the expanded field of architecture and the work of Charles Jencks in that field including opening and maintaining a museum in the Grade 1 listed house known as The Cosmic House in Lansdowne Walk, Holland Park, London. To promote research for the public benefit in all aspects of those subjects (and to publish the useful results).
Areas of Operation
Where this charity is registered to operate, as self-declared to the Charity Commission. These are regulatory classifications, not a list of active programmes, and don't necessarily indicate fundraising activity in each location.
Region
Financial Information
Financial Efficiency
Higher than 19% of UK Heritage charities with income £100K to £1M (sample: 392). How is this calculated?
Higher than 6% of UK Heritage charities with income £100K to £1M. How is this calculated?
Lower overhead than 89% of UK Heritage charities with income £100K to £1M. (Lower overhead is generally read as more efficient.) How is this calculated?
Latest Financial Breakdown
Income Sources
Expenditure Categories
Financial Trend
Annual Returns
As filed with the Charity Commission for England and Wales. Most recent filing covers the financial year ending 2025.
| Financial Year | Income | Expenditure | Charitable Spending | Net Assets | Reserves | Staff |
|---|---|---|---|---|---|---|
| 2025 | £687,998 | £549,769 | £183,526 | £293,320 | £293,320 | 6 / 12 |
| 2024 | £713,395 | £580,554 | £223,498 | £155,091 | £140,538 | 6 / 15 |
| 2022 | £431,735 | £291,197 | 0 / 5 |
Staff column shows: Employees / Volunteers
Frequently asked questions about The Jencks Foundation
What does The Jencks Foundation do?
To promote the understanding and knowledge of architecture including the expanded field of architecture and the work of Charles Jencks in that field including opening and maintaining a museum in the Grade 1 listed house known as The Cosmic House in Lansdowne Walk, Holland Park, London. To promote research for the public benefit in all aspects of those subjects (and to publish the useful results).
How much income did The Jencks Foundation report in 2025?
The Jencks Foundation reported total income of £688k and reported expenditure of £550k for the financial year ending 2025, based on the most recent annual return filed with the Charity Commission.
How efficient is The Jencks Foundation?
The Jencks Foundation has a program ratio of 26.7%, meaning that share of its income goes directly to charitable activities. This is higher than 19% of UK Heritage charities with income £100K to £1M (sample of 392 charities). See our methodology for how this is calculated.
When was The Jencks Foundation registered as a charity?
The Jencks Foundation was registered with the Charity Commission for England and Wales on 21 December 2021 as charity number 1197265. It has been registered for 5 years.
Who runs The Jencks Foundation?
The Jencks Foundation is governed by a board of 4 trustees. The chair of trustees is LILY CLARE JENCKS. Trustees are legally responsible for the charity's governance and are listed in full on its profile.
Where does The Jencks Foundation operate?
The Jencks Foundation operates in England And Wales, as recorded in its Charity Commission filing.
Is The Jencks Foundation a registered charity?
Yes — The Jencks Foundation is a registered charity in England and Wales, charity number 1197265.
Details
19 LANSDOWNE WALK
LONDON
W11 3AH
Registry Information
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Major UK charities in the same primary sector, drawn from the curated priority cohort.
Trustees
Also governs 1 other charity
Sectors & Classifications
Data & trust
- Register data refreshed
- 14 May 2026
- Methodology
- How metrics are calculated