We specialise in analysing social housing data upgrading lower bands to EPC C or B carrying out highly accurate EPC assessments which are second to none.
Comprehensive PAS Services for delivery of WH-SHF measures are also provided at reasonable rates.
EPCs Upgraded to Band C for no more than the cost of an EPC Assessment & lodgment.
Solar PV with Battery for Zero Outlay. A large number of properties can be upgraded to EPC Band C or B for no cost instead of having to deliver costly WH-SHF measures.
Heating & Insulation upgrades planned & delivered through WH-SHF with no hidden fees.
Real Results: Up until the government withdrew ECO4 in November 2025 Delta Surveys arranged for over £11 million worth of fully funded heating & insulation upgrades to be delivered to various social housing providers for No Cost.
Delta Surveys Ltd has over four decades of experience in the insulation industry, collaborating with social housing providers delivering over £11 million in upgrades until the government scrapped ECO4 in their Autumn Budget in November 2025.
Backed by funding from trusted sources such as E.ON Energy, Delta Surveys Ltd ensured that social housing providers didn’t face any costs for surveys, assessments, or installations.
Our Mission during ECO4 was:
“To maximise the potential of 100% funding for social housing providers, saving organisations substantial costs while improving the comfort and efficiency of social housing across the UK.”
PAS Services For WH-SHF Funded Projects
Our PAS Services encompass a comprehensive and fully integrated offering, including:
Our approach is built around robustness, consistency, and risk reduction for delivery partners and to provide a complete, audit-ready and PAS-compliant package rather than a fragmented service.
We operate with clearly defined Service Level Agreements (SLAs) for each service stream, ensuring transparency on timelines, responsibilities, and outputs.
Delta Surveys would be more than happy to provide further details on our SLAs, workflows, and governance processes.
Please do not hesitate to contact us if you require any further technical clarification or to explore how we can support current and future retrofit WH-SHF programmes.
Data Analysis of Housing Stock
Precise and comprehensive evaluation of housing stock for No Cost to identify eligible properties for WH-SHF funded heating, insulation, and renewable energy upgrades.
And an in-depth analysis of housing stock to identify the properties in EPC band D and E which we can lodge in Band C, simply by carrying out a new EPC survey.
EPC Upgrades to Band C
EPC lodgements from D or E up into EPC Band C for no more than the cost of having an EPC survey carried out.
Identifying properties with expired or no EPC in real time by checking up to the minute lodgements on the EPC Register.
After careful analysis it’s been identified that energy ratings for most properties on social housing databases are either incorrect, out of date or are in the wrong (lower) EPC band.
Based on experience, large numbers of D or E rated EPC’s (which should be in Band C) are found on the ‘live’ EPC Register which can be easily corrected simply by having an EPC survey carried out and lodged in Band C on the Register which cancels out/supersedes the existing or expired incorrect EPC currently on the Register.
Installation of Loft Insulation to achieve EPC Band C
For the few properties where re-lodging the EPC alone will not upgrade the property from D or E to C band Delta Surveys will facilitate for loft insulation to be upgraded to 300mm+ or to 350mm to enable the property to achieve EPC Band C with a new EPC survey carried out after installation then lodged on the EPC Register in Band C.
Current Building Regulations require loft insulation to be 270mm deep, but at Delta Surveys, we go the extra mile by upgrading Loft Insulation to 300mm+ or to 350mm deep.
Why instal extra depth?
EPC software rates 270mm as ‘Good,’ but 300mm+ or 350mm earns a ‘Very Good’ rating, resulting in a higher SAP score.
This seemingly small difference has a big impact on EPC bands.
For instance, upgrading loft insulation to 270mm in D rated properties very often leaves them in EPC Band D, but increasing it to 300mm+ or 350mm nearly always raises the property’s rating from EPC D band up into Band C, resulting in significantly more properties being lodged on the EPC Register in Band C.
Renewable Energy Solutions for Social Housing
Installation of WH-SHF funded renewable energy options such as Air Source Heat Pumps and Solar PV systems, helping social housing providers meet energy efficiency goals.
Project and Resident Coordination
Arranging appointments and coordinating with residents directly to ensure minimal disruption during assessments and installations, with a resident-focused approach to scheduling.
“David and his team at Delta Surveys Ltd were professional, efficient, and highly organised. They coordinated directly with our residents, making the entire process seamless. The upgrades to our properties have made a noticeable difference, and all without a single expense. We highly recommend their services to other social housing providers.”
– Susan O’Brien, Senior Asset Coordinator, Peabody
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