Our Members
Residents who need voting rights, maintenance requests, document access and a genuine voice in how the cooperative is run.
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TRAPEZIUM Community Investment began as a handful of neighbours determined to own their homes together. Today it is a thriving cooperative and a forum where what we learn locally informs a global conversation on housing and health.
We exist to give residents secure, affordable, healthy homes through cooperative ownership — and to share what we learn so others, anywhere, can do the same.
Our content is local: the gardens, the bylaws, the maintenance rotas, the retrofits. Our analysis is global: how those local solutions speak to climate resilience, housing rights and environmental health far beyond our street. We call it the glocal approach.
Trapezium is built to serve the people who live here and the people learning from us around the world.
Residents who need voting rights, maintenance requests, document access and a genuine voice in how the cooperative is run.
Other cooperatives, NGOs, academics and urban planners exchanging research and lived experience across borders.
Officials and institutions seeking practical, evidenced case studies on social housing and environmental health.
Neighbours pool resources and form a resident-owned cooperative built on one-member-one-vote.
First retrofits and shared gardens turn environmental health into a founding principle.
We open our case studies to the world, launching an international forum for shared learning.
The Collecting Project channels members and donors into funding the next generation of homes.
Every member has an equal say. Our governance is designed to be transparent, participatory and resilient — the same model we research and share with the forum.
All members vote on budgets, bylaws and major decisions — one member, one vote.
A volunteer board, elected from and by members, stewards day-to-day operations.
Finances are published to members in full — the Collecting Project is auditable by all.
Our rulebook is open-source — free for other cooperatives to adapt and improve.
Our board is volunteer, term-limited and elected at the General Assembly. Every member can stand and every member can vote.
Founding resident. Twenty years in tenant-led housing in South Yorkshire.
Term: 2025–2028FCA Mutuals specialist accountant; treasurer of two community-benefit societies before Trapezium.
Term: 2025–2027Lecturer in Housing Health, UCL. Author of the network's first damp-and-health protocol.
Term: 2024–2027Local councillor and former Director of Housing; chairs our complaints sub-committee.
Term: 2025–2026Open Member representative. Leads the inclusion working group and Saturday community kitchen.
Term: 2026–2028Chair of Cooperativa Habitar (Lisbon). Brings cross-border governance practice to the board.
Term: 2025–2027Investor Member representative; runs our quarterly investor briefings.
Term: 2026–2028Co-op secretary 12 yrs. Runs the General Assembly, voting platform & member onboarding.
Term: staff officerLocal councils, peer cooperatives, universities and regulated service providers — all named, none anonymous.
Housing & Wellbeing partnership covering retrofits, damp surveys and allocations.
Joint research on indoor air quality, ventilation and respiratory outcomes in social housing.
Sister housing co-op — bylaws partner, joint case studies, board exchange programme.
National membership body. We follow their model rules and submit annual returns.
Stripe for member fees (PCI-DSS, FCA-authorised). Zeffy for fee-free donations.
Co-op landlord insurance and trustee indemnity at a member-negotiated rate.
EPC & structural surveys (Atlas) and independent annual statutory audit (Mutual Audit).
PAS 2035 retrofit contractors for the Phase 1 cavity-wall and roof programme.
Local member groups that grow social wellbeing alongside the housing work.
We started by trying to fix the damp in our own homes. We ended up with a blueprint that cooperatives on three continents now use.
Whether you want to live cooperatively, research with us, or simply fund the mission — there is a place for you here.