Domna Calls for UK Social-Housing Retrofit Procurement Reform

UK retrofit contractor Domna is urging changes to how social-housing retrofit work is procured, arguing that an overcrowded and fragmented framework market has not consistently delivered competitive pricing. Its report says housing associations can face limited opportunities to renegotiate after contractors are appointed, particularly where contracts set unit prices for as long as five years. Frameworks are run by commercial companies, charities and public bodies, and Domna notes that some commercial providers earn supplier fees or commissions. The report’s concern is that the structure may make it difficult for buyers to compare prices and establish whether contracted rates remain aligned with the wider market.

Domna’s benchmarking of one unnamed housing association found contracted prices substantially above market averages for several measures: low-energy lighting was 93% higher, thermostatic radiator controls 87% higher, internal wall insulation 79% higher, and cavity wall insulation 78% higher. The report says prices are not routinely checked against the broader market after award. It also warns that contractors may recover margins through variations and call-outs, while buyers have limited leverage once agreed prices are in place. These findings are specific to the analysis described and should not be treated as a universal measure of retrofit pricing across the sector.

The report recommends using fewer, mandatory government-run frameworks; requiring open-book contracting, with contractors disclosing costs and profit margins; and agreeing target costs before work begins. It also calls for better-resourced public-sector procurement teams and contractor assessment based on completed work rather than paperwork alone. For government buyers, these recommendations point to practical review areas: framework design and fees, market testing of rates after award, how variations are priced, and whether performance assessments capture delivery quality and outcomes. For contractors, transparent cost build-ups and early engagement on scope, design, programme and delivery risks may become increasingly important in competitive bids and contract management.

A scheme examined by Domna illustrates the potential value of property-level assessment, but is not presented as a confirmed sector-wide saving. Its projected cost was revised from £2.8 million, or £21,000 per home, to £1.9 million, with a median of £14,000 per home, after individual properties were assessed. Domna estimates that changes to procurement, contract pricing and project planning could save the social-housing sector around £2 billion annually; this is the company’s estimate, not a verified realized saving. Anna Moore, Domna’s chief executive, said: “Every pound lost to duplicated work or uncompetitive contractor pricing is money that cannot be invested in making another home warmer, safer or cheaper to run.” Dan Germann, managing director of Durkan Regen, emphasized early discussions: “Open conversations about scope, design, costs and programme risks should start early. The aim should be to agree what each home actually needs, what a sensible target cost looks like and how variations will be handled if conditions change.”

• Domna says fragmented frameworks and limited post-award market checks can leave housing associations exposed to above-market retrofit prices.
• In one housing association benchmark, low-energy lighting was 93% above market averages; thermostatic radiator controls were 87%, internal wall insulation 79%, and cavity wall insulation 78% higher.
• Domna proposes fewer mandatory government-run frameworks, open-book pricing, better-resourced public procurement teams, and contractor evaluation based on completed work.
• The report says some retrofit and facilities-management contracts use agreed unit prices for five years, potentially limiting buyers’ ability to renegotiate after award.
• The analyzed scheme’s projected cost fell from £2.8 million (£21,000 per home) to £1.9 million, with a £14,000 median per home, after property-level assessments.
• Treat the scheme comparison as a project-specific example, not a confirmed saving applicable across the market.
• Domna estimates procurement, pricing and planning changes could save the sector around £2 billion annually; this is the company’s estimate.
• Buyers can review how frameworks charge fees or commissions, how agreed rates are market-tested, and how variations and call-outs are priced.
• Contractors pursuing retrofit work should prepare transparent cost and margin information and resolve scope, design, programme and variation assumptions early.