Rental Supply Drops as Rents Hit 5%: Why Mid-Term Rentals Are Surging in London

A Perfect Storm Is Brewing in London's Rental Market

For the first time in three years, the supply of rental properties across the UK has actually fallen. According to recent analysis covered by the Big Issue, rents are now accelerating toward 5% growth by the end of 2026, and with Local Housing Allowance frozen since April 2024, the gap between what tenants can afford and what landlords can charge is widening fast.

The knock-on effects are significant. Councils across London are scrambling to find temporary and mid-term accommodation for families facing homelessness. Insurance companies need somewhere to house policyholders displaced by floods, fires, and building defects. And corporate relocation firms are competing for the same shrinking pool of available properties.

For London landlords and property investors, this creates a genuinely compelling opportunity. Let's break down exactly how mid-term rentals work, what you need to know before jumping in, and whether there's an even better route to hands-off, high-yield income.

What Exactly Are Mid-Term Rentals?

Mid-term rentals typically last between one and six months. They sit in the sweet spot between traditional long-term tenancies (12 months or more on an AST) and nightly short-term lets. Think of them as the furnished, flexible middle ground.

In London, demand for mid-term accommodation comes from several reliable sources:

• Local authority decant placements, where councils temporarily rehouse residents during building works or due to overcrowding
• Insurance housing, where displaced policyholders need a fully furnished home while their property is repaired
• Corporate relocations and project workers who need a comfortable base for a few months
• NHS and key worker housing, particularly in inner London boroughs under staffing pressure

With rental supply now tightening and rents climbing, each of these demand streams is growing more urgent. Councils that previously relied on a surplus of available lets are finding it harder and harder to place families, which means they're willing to pay competitive rates and commit to longer booking windows.

The Pros of Mid-Term Rentals for London Landlords

Reliable, Often Guaranteed Income

Many mid-term bookings come through councils or insurance companies, meaning payments are made by the organisation rather than the individual tenant. This can significantly reduce the risk of non-payment compared to a standard AST.

Fewer Void Periods Than Long-Term Lets

Surprisingly, a well-managed mid-term rental can achieve higher occupancy than a traditional let. When one placement ends, the next is often already lined up, particularly if you're working with a management company like Airhosts that maintains active relationships with booking sources.

Higher Per-Night Yields

Mid-term rentals typically command higher monthly rents than a standard AST, though lower than nightly short-term rates. For a two-bedroom flat in Zone 2, the premium over a long-term let can be 20% to 40%.

No Section 21 Drama

Because mid-term rentals don't rely on traditional ASTs, you avoid the evolving complexity around Section 21 reform and the Renters' Rights Act. The agreements are typically licence-based or company lets, giving both parties clearer terms.

The Pitfalls You Need to Watch For

Mid-term rentals aren't without their challenges, and it's important to go in with your eyes open.

Council Rates Can Be Below Market

While council placements offer reliability, the rates they pay often sit below what the open market would bear. Local Housing Allowance caps mean boroughs are working within tight budgets. You may find yourself accepting lower rents in exchange for guaranteed occupancy.

Furnishing and Setup Costs

Mid-term lets need to be fully furnished to a good standard. That means an upfront investment in furniture, kitchenware, linens, and broadband. For landlords currently renting unfurnished, this transition requires capital.

Tenant Turnover Means More Management

Every changeover requires cleaning, inventory checks, and potentially minor maintenance. If you're managing this yourself, it can quickly become a second job. This is where professional management becomes not just helpful but essential.

Regulatory Grey Areas

Depending on your borough and the length of stay, you may need to navigate planning rules around short-term use. Properties in some London boroughs require planning permission for stays under 90 days, and some leaseholders face restrictions on temporary lettings. Always check your lease terms and local authority guidance before committing.

Is There a Simpler Path to Higher Returns?

Mid-term rentals can absolutely work, especially in the current supply-squeezed market. But here's the honest truth: they come with operational complexity that many landlords underestimate. Managing relationships with councils and insurers, coordinating turnovers, maintaining furnishing standards, and staying compliant across multiple regulatory frameworks takes real time and expertise.

This is exactly why many London landlords are choosing professionally managed short-term lets instead.

Short-term lets, when managed well, consistently outperform both mid-term and long-term rentals on yield. A professionally managed one-bedroom flat in central London can generate 30% to 60% more income than the same property on a 12-month AST. And unlike self-managed mid-term lets, you don't need to handle a single guest message, cleaning schedule, or pricing adjustment yourself.

The key word there is "professionally managed." Running a short-term let yourself is demanding. But with a company like Airhosts handling everything from listing optimisation and dynamic pricing to guest communications, cleaning, and regulatory compliance, you get the upside without the workload.

Why London Landlords Are Choosing Airhosts

At Airhosts, we manage short-term and mid-term lets across London for landlords who want maximum returns with minimum hassle. We handle pricing strategy, professional photography, 24/7 guest support, housekeeping, and full compliance with London's 90-day short-term let rules. Our landlords earn more than they would on a traditional tenancy, and they do it without lifting a finger.

The rental market is shifting fast. Supply is down, demand is surging, and the landlords who act now will be the ones who benefit most. Whether you're exploring mid-term council placements or ready to unlock the full earning potential of short-term lets, the smartest move you can make is to work with a team that knows the London market inside out.

Ready to find out what your property could earn? Get in touch with Airhosts today for a free, no-obligation rental estimate and discover how simple high-yield property income can be.