Cassion Castle Architects is a London architecture and construction practice founded in 2006. It publishes residential and commercial work on urban and rural sites, with an emphasis on craftsmanship and natural materials. RIBA examples include Oak Lane House, Coast House, Yorkton Workshops and Long Sutton Studio. Clients should distinguish the architectural appointment from any construction arrangement and confirm design responsibilities, contractor roles, fees and programme before proceeding.
Get to know the architect firm
Architect firm overview
- Architect firm address
- 10 Old Diary Court,17 Crouch Hill, London N4 4APFrom the supplied business directory; confirm current arrangements.
- Location
- London · N4 4AP
- Residential work
- Included in the supplied residential directory. Current project suitability is confirmed during your enquiry.
Find your fit
Services & project interests
Topics drawn from published firm information and official directory sources. These are research signals, not independently verified specialisms or a guarantee of current availability.
Selected published projects
- Yorkton Workshops
- Oak Lane House
- Coast House
- Bar Lane
Project names are taken from official firm or RIBA sources, checked 2026-10-29. Ask the practice about the work and its current relevance to your brief.
Before planning
Ask about relevant experience, feasibility, survey needs and the planning route.
From design to build
Confirm technical drawings, consultant coordination, tender support and any site involvement.
Ask for examples of similar completed projects, the named team and the services included in their proposal. Project photographs will appear here when the practice supplies or approves them.
Official RIBA listing checked
The architect firm’s name and address were matched to its official RIBA practice listing on 29 October 2026. Individual ARB registration, insurance, availability and the proposed appointment need separate confirmation.
View the official RIBA practice listing · What this check means
Evidence matters
Credentials, fees & availability
- Named architect
- Not yet independently checked for this directory entry. Check the named professional on the ARB register .
- RIBA status & insurance
- The official RIBA practice listing was matched on 29 October 2026. Individual ARB registration, insurance and availability need separate confirmation.
- Fees & earliest start
- Request a written proposal for your scope, including VAT, revisions, site visits and exclusions.
Information & corrections
Directory source: supplied RIBA Residential Directory. Published website checked 29 October 2026. Website topics are collected from public pages and may be incomplete. Firm-confirmed information will be labelled separately.
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