Windmill Hill Consulting
- Major gifts
- 2-5 staff
- Herndon, Virginia
- Founded 2006
5 clients on Form 990Giving Institute memberCFRE on staff
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About
Windmill Hill Consulting is a boutique fundraising consulting firm founded in 2006 by Barbara O'Reilly, CFRE, helping nonprofits strengthen donor relationships through direct mail, individual giving programs, and board/leadership alignment.
- Sectors served
- HealthInternational
Named clients
- Clients on record
- 5
- 3 on Form 990
- 990 fees reported
- $99K
- across 4 engagements
- Typical fee
- $26K
- largest $42K
- Years on record
- 2017–2025
- from 990 filings
| Source | ||||
|---|---|---|---|---|
| The National Bonsai FoundationWashington, DCProvide wealth screenings, analytics, and develop prospectsForm 990 · 2025Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Form 990 · 2025Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Provide wealth screenings, analytics, and develop prospects | $5,000 | |
| The National Bonsai FoundationWashington, DCProvide wealth screenings, analytics, and develop prospectsForm 990 · 2024Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Form 990 · 2024Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Provide wealth screenings, analytics, and develop prospects | $36,000 | |
| The National Bonsai FoundationWashington, DCProvide wealth screenings, analytics, and develop prospectsForm 990 · 2023Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Form 990 · 2023Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Provide wealth screenings, analytics, and develop prospects | $42,000 | |
| Rebuilding Together Inc.Washington, DCSupport individual giving initiativesForm 990 · 2022Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Form 990 · 2022Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Support individual giving initiatives | $0 | |
| The District of Columbia Bar FoundationWashington, DCConsultingForm 990 · 2017Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Form 990 · 2017Nonprofits that spend more than $15,000 a year on professional fundraising must list, on IRS Form 990 Schedule G, each firm they paid more than $5,000, and how much. | Consulting | $15,506 | |
| Hospice of the ChesapeakePasadena, MDFirm website | Firm website | — | — | |
| Refugees InternationalWashington, DCFirm website | Firm website | — | — |
Key staff
Barbara O'Reilly, CFRE
Founder & Principal