Quarterly Assurance
Ideal for establishing a baseline, detecting drift early, and maintaining decision-ready clarity through travel and transition.
Standards Assurance Engagements.
Engagements are structured assurance relationships — a defined cadence of review and reporting that preserves standards over time. We accept a limited number of engagements to preserve independence, discretion, and consistency.
Monthly Assurance
Ongoing verification with regular reporting.Our signature tier for environments that require continuity across seasons, staffing changes, and elevated expectations.
High-Frequency Assurance
For complex estates where composure depends on disciplined verification and consistent reporting — without operational interference.
Pricing is shared privately once fit and scope are confirmed. Windsor Butler does not provide operational or concierge services.