Corrigendum-Homes for Net Zero Phase 3 (HfNZ P3)

The Department for Energy Security & Net Zero is procuring contractors to deliver Phase 3 of the Homes for Net Zero research programme, a multiyear, large‑scale trial involving approximately 1,250 owner‑occupied homes. The programme seeks to evaluate practical, scalable pathways to decarbonise complex and space‑constrained domestic properties, with a particular focus on low‑carbon heating solutions such as air‑source heat pumps, reversible air‑to‑air systems and alternative electric domestic hot water options. Researchers will also assess real‑world performance, cost implications and user experience while addressing resilience to climate extremes, including overheating mitigation.

This procurement is organised into four interlinked lots. Lot 1 provides comprehensive trial management, participant coordination, data collection and monitoring operations, and an innovation test bed; Lot 2 focuses on data integration, technical analysis and the development of an analytical framework; Lot 3 designs consumer engagement strategies, delivers social research, and outlines pathways to accelerate uptake of low‑carbon heating; and Lot 4 is responsible for the design, installation, commissioning and ongoing maintenance of heat‑pump and electric heating systems, together with the specification and deployment of monitoring equipment. Partnerships across the lots and alignment with related programmes such as Built Environment Adaptation and Resilience and the Heat Pump Ready Programme are essential to the success of the trial.

Deliverables include annually published research findings, trial delivery summaries, publicly accessible datasets (subject to GDPR), thematic briefs and a final comprehensive report that will directly inform policy development on clean heat, energy efficiency and climate resilience. All data handling and system installations must be performed in compliance with GDPR and meet UK energy labeling and safety standards for heat pump systems.

DESNZ is seeking to procure a contractor/s to deliver Phase 3 of the Homes for Net Zero research programme (HfNZ P3). This is a continuation of our multiyear, largescale research and demonstration trial, building on the existing cohort of approximately 1,250 owner-occupied homes. Among other tasks the appointed contractor(s) will be responsible for trial management and coordination, longitudinal monitoring, data collection and processing, and participant engagement – including physical measurements in homes and social research with occupants.
It will include research on practical, scalable pathways to decarbonising owner-occupied homes, particularly complex-to-decarbonise and space constrained properties, with a focus on low carbon heating. This includes evaluating the real-world performance, costs, and user experience of heat pumps (including reversible air-to-air systems), alternative electric heating and domestic hot water solutions. Consumer engagement approaches, and measures to improve resilience to a future climate, such as overheating mitigation, are also key elements of HfNZ P3.
The programme will require delivery through competitively procured work packages (lots);
• Lot 1: Trial management and co-ordination – including programme management of whole trial, collecting data from monitoring devices and ensuring high data quality, managing trial participants, supporting additional technology trials through an innovation test bed;
• Lot 2: Data analysis and research – including technical analysis of in-home monitoring data to answer the research questions, and collaboration with Lots 3 and 4 to ensure methods are designed to address those questions.
• Lot 3: Consumer engagement and social research – establishing best practice consumer engagement approaches to transition homes to low carbon heating and using these to support the delivery of measures in Lot 4, carrying out social research to support the research objectives in collaboration with Lot 2.
• Lot 4: Design and installation of low carbon heating measures in homes – including, air-source heat pumps, reversible air-air heat pumps, alternative approaches to electric domestic hot water in space constrained homes and the specification and installation of monitoring equipment.
Contractors will need to work collaboratively across the work packages as well as with DESNZ and possibly with linked programmes, notably Built Environment Adaptation and Resilience (BEAR) and Heat Pump Ready Programme (info here: https://www.gov.uk/government/publications/heat-pump-ready-programme/information-about-the-heat-pump-ready-programme#latest-opportunity-from-2026).
Outputs are likely to include regular, publicly accessible research publications; including two annual reports with research findings, an annual trial delivery summary, and publication of datasets (subject to GDPR). The programme will also deliver thematic research briefs and a final report at project completion, with outputs designed to directly inform DESNZ policy development and analysis on clean heat, energy efficiency, and climate resilience.
DESNZ is holding a supplier event on MS Teams on Wednesday 29th April 2026 from 1400 - 1600, consisting of presentations by DESNZ and interactive feedback sessions.

Contract location: UK
Communication: https://beisgroup.ukp.app.jaggaer.com/esop/guest/go/public/opportunity/current
Amendments:
Other additional information: Extend the Enquiry Deadline by one week for receipt of Clairification Questions to 17 July 2026 at 17:00. All other dates remain the same

Languages in which tenders or requests to participate may be submitted: En
Enquiry deadline: 2026-07-10T17:00:00+01:00
Submission address and any special instructions: https://beisgroup.ukp.app.jaggaer.com/esop/guest/go/public/opportunity/current
Tenders may be submitted electronically: allowed
Award decision date (estimated): 2026-10-12T23:59:59+01:00

Lot number: 1
Description: Provides programme-wide trial management, participant engagement, data operations and coordination across all work packages to ensure effective delivery, reporting and governance. 19. The appointed supplier for Lot 1 will be required to work with the suppliers awarded the other three lots, as well as coordinating input from suppliers delivering two other programmes, whose objectives overlap with, but will be commissioned separately from, HfNZ Phase 3
Lot value (estimated)
3.100.000,00 GBP excluding VAT
3.720.000,00 GBP including VAT
This contract is subject to renewal: Yes
Description of renewals: Following a future review of the programme and budgets an additional 1 year extension may be proposed to extend the trial. Beyond this point, future funding and government priorities are uncertain, particularly in the rapidly evolving field of climate research
Information about options. Options: Yes

Lot number: 2
Description: Delivers the analytical framework, data integration and technical research needed to turn monitoring, survey and intervention data into robust evidence and publishable findings
Lot value (estimated)
500.000,00 GBP excluding VAT
600.000,00 GBP including VAT
This contract is subject to renewal: Yes
Description of renewals: Following a future review of the programme and budgets an additional 1 year extension may be proposed to extend the trial. Beyond this point, future funding and government priorities are uncertain, particularly in the rapidly evolving field of climate research
Information about options. Options: Yes

Lot number: 3
Description: Designs consumer engagement, tailored roadmap advice and social research to improve understanding, support decision-making and evaluate barriers to low carbon heating uptake.
Lot value (estimated)
760.000,00 GBP excluding VAT
912.000,00 GBP including VAT
This contract is subject to renewal: Yes
Description of renewals: Following a future review of the programme and budgets an additional 1 year extension may be proposed to extend the trial. Beyond this point, future funding and government priorities are uncertain, particularly in the rapidly evolving field of climate research
Information about options. Options: Yes

Lot number: 4
Description: Designs, installs, commissions and maintains heat pumps and related electric heating solutions, including monitoring, to test performance and participant experience in trial homes.
Lot value (estimated)
3.300.000,00 GBP excluding VAT
3.960.000,00 GBP including VAT
This contract is subject to renewal: Yes
Description of renewals: Following a future review of the programme and budgets an additional 1 year extension may be proposed to extend the trial. Beyond this point, future funding and government priorities are uncertain, particularly in the rapidly evolving field of climate research
Information about options. Options: Yes

Award criteria:

Name	Type	Weighting
Meeting the Requirements	quality	40%
Meeting the Requirments	quality	40%
Skills and Capability	quality	20%
Lot Specific - Research Methodology	quality	20%
Lot specific - Research Methodology	quality	20%
Project Management and Risk	quality	15%
Lot Specific - Managing a programme with Mulitplwe contractors	quality	10%
Cost	cost	10%
Social Value	quality	10%
Resource Availability	quality	5%