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Palm House Conservation Package

ROYAL BOTANIC GARDENS, KEW

This public procurement record has 1 release in its history.

Tender

02 Nov 2026 at 15:13

UK4 - Tender Notice
Summary of the contracting process

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.

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Notice Information

Notice Title

Palm House Conservation Package

Notice Description

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

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-0795cc
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/103834-2026
Current Stage
Tender
All Stages
Tender

Procurement Classification

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

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work

CPV Codes

45210000 - Building construction work

Notice Value(s)

Tender Value
£20,000,000 £10M-£100M
Lots Value
£20,000,000 £10M-£100M
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
2 Nov 2026Today
Submission Deadline
Not specified
Future Notice Date
Not specified
Award Date
Not specified
Contract Period
10 Aug 2027 - 5 Dec 2029 2-3 years
Recurrence
Not specified

Notice Status

Tender Status
Active
Lots Status
Active
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
ROYAL BOTANIC GARDENS, KEW
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
RICHMOND
Postcode
TW9 3AQ
Postcode Area
Twickenham
Country
England
Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI7 Outer London - West and North West
Small Region (ITL 3)
TLI75 Hounslow and Richmond upon Thames
Delivery Location
TLI75 Hounslow and Richmond upon Thames
Local Authority
Richmond upon Thames
Electoral Ward
Kew
Westminster Constituency
Richmond Park

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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