---
title: "Palm House Conservation Package"
ocid: "ocds-h6vhtk-0795cc"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0795cc"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0795cc.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0795cc.json"
source: "Find A Tender Service"
current_stage: "Tender"
buyer: "ROYAL BOTANIC GARDENS, KEW"
published: "2026-11-02"
---

# Palm House Conservation Package

Buyer: ROYAL BOTANIC GARDENS, KEW  
Current stage: Tender  
OCID: ocds-h6vhtk-0795cc

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## Summary

Royal Botanic Gardens, Kew is seeking a principal contractor for conservation, refurbishment and accessibility works to the Grade I listed Palm House at Kew, within the UNESCO World Heritage Site. The package covers the historic structure and associated elements: replacing glazing; conserving wrought and cast ironwork; overhauling the historic ventilation system; repairing stonework and dado; restoring rainwater goods; accessibility improvements, internal alterations, mechanical and electrical works, and enabling works. The work is in Richmond and must be coordinated with visitors, staff, living collections and ongoing garden operations in an operational heritage setting. Decarbonisation and landscaping are separate packages and are outside this contract. This is a building construction project, with the emphasis on specialist work to a historic glasshouse rather than general new-build construction.

The buyer invited offers through a two-stage competitive flexible procedure. This is a selective process; the tender set 9 December 2026 at 23:59 as both the enquiry deadline and the deadline for expressions of interest. The estimated award decision date is 10 August 2027. The contract period runs from 10 August 2027 to 5 December 2029. The estimated value is £20 million excluding VAT (£24 million including VAT). There is one lot, and the stated suitability includes small and medium-sized businesses. Evaluation is based on quality, with weighted criteria covering company technical capability, relevant project experience, conservation methodology and understanding of historic structures, supply-chain capability, quality and corrosion protection, principal contractor experience, CDM and health and safety, working in live environments, and programme and risk control.

This opportunity is suited to a principal contractor able to manage a substantial, multidisciplinary conservation and refurbishment project, supported by specialist supply-chain partners. Bidders will need to demonstrate relevant experience on historic structures and a credible conservation methodology, alongside technical capability in glazing, ironwork, ventilation, stonework and rainwater goods. Strong delivery planning is important: the contractor must coordinate trades and control programme and risk while the gardens remain operational and visitors, staff and living collections are present. The evaluation also places weight on health and safety under CDM, quality assurance and corrosion protection, and experience in live environments. The lot is identified as suitable for SMEs, which may be relevant to capable specialist contractors or firms able to assemble and manage an appropriate delivery team.

## Notice

Appointment of a Principal Contractor to deliver conservation, refurbishment, and accessibility works to the Grade I listed Palm House within the UNESCO World Heritage Site at Kew. * Scope of Works: Conservation and refurbishment of the historic Palm House structure and associated elements, including glazing replacement, wrought/cast ironwork conservation, historic ventilation system overhaul, stonework/dado repairs, rainwater goods restoration, accessibility enhancements, internal alterations, M&E works, and related enabling works. * Operating Environment: Delivered within a live operational environment of international heritage significance, requiring meticulous coordination with site visitors, staff, living collections, and ongoing garden operations and maintenance. * Package Boundaries: Excludes separate decarbonisation and landscaping packages, which will be procured under separate standalone contracts. For more information about this opportunity, please visit the eSourcing portal at: https://www.delta-esourcing.com/tenders/UK-UK-Richmond:-Building-construction-work./D47WHXCKR6 To respond to this opportunity, please click here: https://www.delta-esourcing.com/respond/D47WHXCKR6

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/103834-2026 |
| Notice type | UK4 - Tender Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Selective |
| Procurement method details | Competitive flexible procedure |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 2 Nov 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 10 Aug 2027 - 5 Dec 2029 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £20,000,000 |
| Lots value | £20,000,000 |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Active |
| Lots status | Active |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | ROYAL BOTANIC GARDENS, KEW |
| Locality | RICHMOND |
| Postcode area | Twickenham |
| Postcode | TW9 3AQ |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI7 Outer London - West and North West |
| ITL 3 | TLI75 Hounslow and Richmond upon Thames |
| Local authority | Richmond upon Thames |
| Electoral ward | Kew |
| Westminster constituency | Richmond Park |
| Delivery location | TLI75 Hounslow and Richmond upon Thames |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45210000 - Building construction work

## Release History

- 2 Nov 2026 at 15:13 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/103834-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/103834-2026
  2nd November 2026 - Tender notice on Find a Tender

## Notice URLs

- https://www.delta-esourcing.com/respond/D47WHXCKR6
- https://www.delta-esourcing.com/suppliers/response-manager
- https://www.delta-esourcing.com/tenders/UK-UK-Richmond:-Building-construction-work./D47WHXCKR6
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0795cc. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0795cc.json.