00350-AST Whole House Retrofit Installation Works 2026-2030

Stonewater LtdcontractFind a TenderRef ocds-h6vhtk-05f8ebProcurement Act 2023SME suitablepending
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Estimated value

Awarded value

£70.0m

Awarded 21 Jun 2026

Suppliers

4

Lots

4

4 awarded

Published

24 Jun 2026

Description

Stonewater would like to appoint suitable contractors to deliver it's 2026-2030 retrofit programme. Our programme is informed by the Net Zero Investment Plan and includes the delivery of retrofit works across multiple funding streams. Works must be carried out in compliance with PAS2035 and PAS2030. The measures to be installed will include but not be limited to: - Insulation - Windows and doors - Heating systems - Solar PV - Ventilation Works will be delivered nationally but split into 4 regional lots. Contractors will be expected to deliver whole house retrofit and at least one element must involve self-delivery. The estimated contract value of £62.2m (incl VAT) is across all lots. Please see lot information to see how each lot is split value wise over the duration of the first 4 years.

Scope

Reference
00350-AST
Commercial tool
Standalone contract
Contract dates
10 May 2026 to 10 May 2030
Possible extension to 10 May 2032

Optional extension period of 12 months + 12 months subject to terms and conditions of contract

CPV classifications
45453100
Contract locations
West Midlands, United Kingdom
South East England, United Kingdom
South West England, United Kingdom
East of England, United Kingdom
Yorkshire and the Humber, United Kingdom
Particular suitability
Small and medium-sized enterprises (SME)

Award criteria

Criteria the buyer will use to evaluate bids.

NameDescriptionTypeWeighting
Quality Written BidWritten Submissionquality45.00%
Pricing SubmissionPricing Submissionprice55.00%
ITT CriteriaWritten Submissionquality45.00%
ITT CriteriaPricing Submissionprice55.00%

Participation

Conditions suppliers must meet to bid.

Provided in ITT documents

Full technical specification is available with unrestricted access to the ITT pack and pass / fail criteria is provided in Document 3 - Conditions of Participation.

Submission & procedure

Procedure
Open procedure

Award details· 4 awards

Awarded supplier(s), contract period and value as published in the award notice.

Awarded value

£31.0m

Award date

21 Jun 2026

Contract start

09 Aug 2026

Contract end

09 Aug 2030

Lots · 4 total

Divisions of the contract. Each lot can be awarded separately.

View all →
LotTitleEst. valueStatus
1West (Lot 1)complete
2South East (Lot 2)complete
3South West (Lot 3)complete
4East (Lot 4)complete