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In deliveryUnited KingdomWorksFramework agreementAdd to pipeline

Windsor Estate External Redecorations and Refurbishment

Awarded to Ian Williams Ltd, Thomas Sinden Ltd, Trident Maintenance Service Ltd

The Royal Household(buyer)

Published
Published 19 November 2025
Deadline
Closed 6 February 2026
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Overview

The Royal Household has awarded a four-year framework contract for external redecorations and refurbishment works across Windsor Estate properties, including Windsor Castle, Windsor Royal Mews, Home Park, and Hampton Court Royal Paddocks. The scope encompasses planned external redecorations, timber and metalwork repairs, window and door replacements, rainwater goods overhaul, masonry repairs, thermal upgrades, and access arrangements across five phased programmes. The contract has been split between two lots, with Ian Williams Ltd and Thomas Sinden Ltd appointed for Lot A (two contractors) and Trident Maintenance Service Ltd for Lot B (one contractor), awarded on 26 May 2026.

Contracting authority

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Lots (2)

  • Windsor Castle and Windsor Royal Mews

    Lot A – 2 contractors to be appointed •Windsor Castle (5 phase programme) •Windsor Royal Mews (5 phase programme)

    Won by Trident Maintenance Service LtdWon by Thomas Sinden Ltd

  • Home Park and Hampton Court Royal Paddocks

    Lot B – 1 contractor to be appointed •Home Park. Predominately residential properties, but includes Frogmore House, various stores, the gardener’s buildings and the conservation workshops. (5 phase programme) •Hampton Court Royal Paddocks.

    Won by Ian Williams Ltd

Key details

Country
United Kingdom
Status
In delivery
Category
Works
Procedure
Open
Contract type
Framework agreement
SME suitable
Yes
Published
19 November 2025
Questions by
26 January 2026
Deadline
Closed
Classification (CPV)
Decoration workRefurbishment work

Award outcome

Award date
26 May 2026
Contract period
31 March 2026 → 31 March 2030
Winners
  • Ian Williams Ltd
  • Thomas Sinden Ltd
  • Trident Maintenance Service Ltd

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Notice history

Every published notice in this contracting process, newest first.

  1. Contract

    27 May 2026

  2. Contract Notice

    19 November 2025

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