Six council housing schemes in Greenwich have been halted after contractor Helix Construct ceased trading and filed a notice of intention to appoint administrators, Construction News reported. The Newbury-based firm, which specialised in affordable housing, education, care and commercial projects across London and the south of England, had administrators from KR8 Advisory formally appointed on 17 September, more than 40 staff are affected.

Helix reported turnover of £39.5m for the eighteen months to 30 June 2025 but fell into a pre-tax loss of just over £180,000, against a £500,000 profit the year before. Directors blamed a mix of planning delays, slow client funding approvals, regulatory processes and construction cost inflation, alongside problems on a small number of contracts. One of the stalled sites is Lemonwell Drive in Eltham, where Helix was building nine flats; the council has not named the other five.

Why it matters

The Royal Borough of Greenwich says its wider Greenwich Builds programme, which has delivered 1,041 of a targeted 1,750 new council homes so far, remains on track despite the disruption, and it has secured all six sites and begun individual reviews with the administrator. But the collapse is another reminder that mid-sized contractors delivering public sector affordable housing are still operating on thin margins where a handful of difficult contracts can tip a profitable firm into administration within eighteen months. It follows a pattern seen repeatedly across the sector this year: a firm with a healthy order book and a specialist public sector client base going under not because demand has dried up, but because cost inflation and payment timing have eaten the margin on the contracts already signed.

What it means for careers and hiring

For site and commercial staff on the affected schemes, the immediate task is understanding how Greenwich and the administrator plan to novate or re-tender the remaining work; novated contracts often carry staff across to the incoming contractor, but there is no guarantee here yet. Subcontractors and supply chain firms owed money on the six sites should register their interest with the administrator promptly and take independent advice before committing further resource.

More broadly, this is a live example of the due diligence QSs and commercial managers should be doing before joining a contractor whose turnover sits in the £30m to £50m range and is heavily weighted towards public sector affordable housing: check how concentrated the client base is, how recent the accounts are, and whether margins have been trending down. For anyone currently placed with a similar-sized specialist contractor, it is worth asking your own finance director directly about contract-level margin performance rather than waiting for the annual accounts to tell the story after the fact.