CSTO Trust Grant Program
Funding Amount
Up to $40,000
Deadline
Rolling / Open
Grant Type
foundation
Overview
CSTO Trust Grant Program
Funder: Castle Square Tenants Organization 2020 Charitable Trust
Background: The Castle Square Tenants Organization 2020 Charitable Trust was formed in November 2020 with a contribution from Castle Square Tenants Organization (CSTO). CSTO is the managing partner of Castle Square Apartments, a 500-unit affordable housing development in the South End of Boston, Massachusetts. The Trust is governed by up to eight Trustees (four tenant representatives and four independent trustees appointed by the CSTO Board of Directors).
Mission & Vision: The Trust's purpose is to act as a supporting organization for CSTO as well as to support other organizations in the area which advance its mission. The Trust envisions communities where low-and moderate-income residents and residents of all races and ethnicities have the power, voice, and resources to build a united front where racial and societal wealth disparities are actively addressed and eliminated, advancing a more just, equitable, and prosperous society.
2025 Awards: Trustees awarded mini grants to nine eligible organizations in February 2025 and made final awards to twenty eligible organizations in June 2025, totaling $868,000.
Core Values
- Respect: Recognizes, celebrates, and supports each person's unique talents, experiences, and perspectives
- Impact: Follows the ethos "Do nothing about me without me" - change is only sustainable if leaders are inclusive and reflect their communities
- Outcome: Making a positive difference so all may experience a multifaceted sense of hope, health, and well-being
Funding Priorities
The Trust targets funding to two priority areas:
1. Youth/Child Development and Education
2. Affordable Housing
Geographic Scope
Service Areas (Boston neighborhoods only):
Award Ranges
- Up to $15,000: May be processed on expedited basis based on Letter of Interest; may not require full proposal review
- $15,000-$40,000: Subject to full review process
- Maximum request: $40,000
Contact Information
Email: info.trust@cstoboston.org
Leadership
Trustees:
Advisors:
How to Apply
Application Process
Status as of 2026-04-03: 2026 applications are now CLOSED
#### Application Timeline (when open)
1. Letter of Interest (LOI) Route:
- For applications up to $15,000
- May be processed on expedited basis
- Use access code: csto.loi (for new applicants)
2. Full Proposal Review Process:
- For applications requesting $15,000-$40,000
- Required for all requests above $15,000
#### Access Codes
- Prior Grantees: Use access code csto.renew
- New Applicants: Use access code csto.loi
Required Materials
Detailed application requirements are available through the application portal (see application_url below)
Contact for Questions
Email: info.trust@cstoboston.org
Focus Areas & Funding Uses
Fields of Work
Categories
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