00350-AST Whole House Retrofit Installation Works 2026-2030
Estimated value
—
Awarded value
£70.0m
Suppliers
4
Lots
4
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 2030Possible 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 KingdomSouth East England, United KingdomSouth West England, United KingdomEast of England, United KingdomYorkshire and the Humber, United Kingdom
- Particular suitability
- Small and medium-sized enterprises (SME)
Award criteria
Criteria the buyer will use to evaluate bids.
| Name | Description | Type | Weighting |
|---|---|---|---|
| Quality Written Bid | Written Submission | quality | 45.00% |
| Pricing Submission | Pricing Submission | price | 55.00% |
| ITT Criteria | Written Submission | quality | 45.00% |
| ITT Criteria | Pricing Submission | price | 55.00% |
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.
| Lot | Title | Est. value | Status |
|---|---|---|---|
| 1 | West (Lot 1) | — | complete |
| 2 | South East (Lot 2) | — | complete |
| 3 | South West (Lot 3) | — | complete |
| 4 | East (Lot 4) | — | complete |