Britain’s buy-to-let landscape is undergoing one of its most significant transformations in a decade, as a growing cohort of landlords abandons traditional single-family lets in favour of Houses in Multiple Occupation (HMOs) in pursuit of stronger yields and more resilient income streams.
Fresh figures obtained through Freedom of Information requests to councils across the United Kingdom show that annual HMO licence applications have climbed by 40% since 2018, rising from 41,162 to a record 57,725 last year. The analysis, carried out by specialist landlord insurance provider Just Landlords, points to a rental market rapidly reshaping itself around affordability, flexibility and professionalised shared living.
The figures will come as little surprise to property investors who have watched mortgage rates, tax changes and tighter regulation squeeze the economics of the conventional buy-to-let. For many, converting to an HMO, where rooms are let individually to multiple tenants, has become the most effective route to preserving, and in many cases improving, net returns.
The Scottish capital has emerged as the clear leader of the pack, averaging 5,158 HMO applications a year. Oxford follows at a considerable distance with 2,458, while Bristol (1,491), Southwark (1,412) and Tower Hamlets (1,394) round out the top five. The dominance of university cities and inner-London boroughs reflects the twin engines driving HMO demand: student populations and young professionals priced out of self-contained flats.
Yet the more compelling story may lie in where the market is growing fastest rather than where it is already largest. Sandwell in the West Midlands has seen applications rocket by a remarkable 964% since 2018, followed by West Lancashire at 886%, Tower Hamlets at 750%, Guildford at 742% and Waltham Forest at 481%. The pattern points to a decisive pivot of capital away from the traditional London-centric model and towards regional markets where entry prices remain lower and rental yields more generous.
Clark Ross, managing director of Just Landlords, described the shift as a “major evolution” in the UK rental market, noting that landlords are increasingly turning to HMOs to meet demand for flexible, affordable housing. He added that while London remains a cornerstone of the sector, the Midlands and the North are now seeing some areas post application growth of nearly 1,000% since 2018.
The professionalisation of the sector is being matched, and in some cases driven, by a marked toughening of council oversight. Local authority inspections of HMOs are up 83% since 2018, while enforcement actions, which include improvement notices and prosecutions, have leapt by 180%. For seasoned investors, the message is clear: the days of the casually run shared house are drawing to a close.
That tightening regulatory grip is not evenly distributed. In Blackpool, an eye-watering 70% of HMO applications were refused, with Fenland close behind at 51%, Sandwell at 48%, Armagh at 26% and Norwich at 24%. On the enforcement side, Lewisham topped the list with 288 actions a year, followed by Wandsworth (146), Liverpool (141), Denbighshire (141) and Camden (117).
For landlords weighing an HMO conversion, the geographic variation underlines the importance of local due diligence. A property that would sail through licensing in one borough could face costly delays, or outright refusal, a short drive away.
Ross argues that the more rigorous regulatory environment should be welcomed rather than feared, suggesting higher standards protect the sector’s reputation and prevent dedicated, professional landlords from being undercut by sub-standard operators.
For investors, the direction of travel looks increasingly settled. Demand for affordable shared accommodation continues to outstrip supply, particularly in university towns and commuter belts, while councils are signalling that they expect higher standards from those who wish to serve that demand. The HMO sector is no longer a fringe corner of the rental market but a maturing, professionalised segment that, for well-advised landlords, still offers some of the most attractive risk-adjusted returns available in British residential property.
Whether the surge in applications ultimately translates into a sustained reshaping of the rental landscape will depend in large part on how councils balance enforcement with approval. For now, though, the numbers tell their own story: landlords are voting with their chequebooks, and the HMO is increasingly where the smart money is heading.
