New rental regulation is beginning to change landlord behaviour only months after the first major provisions of the Renters’ Rights Act came into force.

Chestertons’ June lettings data indicates that some London landlords have responded to the new ban on rental bidding by increasing the rent at which properties are initially advertised. At the same time, the agency recorded stronger tenant enquiries and a significant reduction in activity within its sales market.

The findings do not establish that every landlord is increasing rent or that the legislation is solely responsible for current market movements. They do, however, demonstrate an important commercial principle: changing the legal framework alters the decisions landlords make before a tenancy is even created.

A prohibition intended to prevent tenants being pushed above the advertised rent can encourage some owners to set a higher initial figure because they no longer have the flexibility to accept a stronger offer later. Greater tenancy security can affect how carefully landlords assess applicants. Restrictions on rent increases and possession can influence refurbishment timing, target rent and the decision to retain or sell.

These are not merely operational questions for letting agents. They affect rental income, mortgage affordability, property values and the amount of debt a portfolio can support.

For professional landlords, the appropriate response is not to treat every property in isolation. The stronger approach is to decide whether each asset should be refinanced and retained, improved and repositioned, or sold as part of a planned portfolio reduction.

The Rental-Bidding Ban Is Changing the Importance of the Asking Rent

Since 1 May 2026, landlords and letting agents in England have been required to state a specific rent when advertising a property. They cannot ask for, encourage or accept an offer above that advertised figure.

The rule is intended to prevent rental bidding wars in which several prospective tenants compete by offering progressively higher rents. A landlord breaching the rules can face a financial penalty of up to £7,000 for a first offence.

Chestertons’ analysis suggests that the restriction has already changed pricing behaviour. Its data showed a sharp annual fall in the number of landlords reducing asking rents during May, the first month under the new system. The agency believes that some landlords increased their starting rents to create room for negotiation below the advertised figure, because accepting more is no longer permitted.

There was some reversal in June, when the number of rent reductions increased again as properties that had been priced too ambitiously remained available. Chestertons’ Head of Lettings, Katinka Hill, said landlords were increasingly being encouraged to establish the correct asking rent at the outset and remain responsive to market feedback.

This illustrates the difficulty created by the new system. Setting the rent too low may prevent the landlord from accepting what the market would otherwise have offered. Setting it too high can reduce enquiries, lengthen the void and eventually force a visible reduction.

The initial advertised rent has therefore become a more consequential commercial decision.

A Higher Asking Rent Does Not Necessarily Produce Higher Income

Landlords should distinguish between the advertised rent and the income ultimately generated by the property.

A flat marketed at £2,500 a month and let immediately may generate more annual income than the same property marketed at £2,700 but left vacant for six weeks before a reduction is agreed. The higher headline rent can be outweighed by the lost income, additional council tax, utilities and letting costs incurred during the void.

The calculation becomes particularly important where the mortgage, service charge and regulatory expenditure leave a relatively narrow margin.

An additional £100 a month appears valuable, but it produces only £1,200 over a full year. A single month without a tenant can erase most or all of that increase.

Landlords should therefore assess the likely annual net income rather than treating the highest plausible asking rent as the objective. Letting-agent evidence, competing stock, tenant demand and the quality of the property should all influence the initial figure.

The new rules reward accurate pricing more than speculative pricing.

Stronger Lettings Demand Is Partly Reflecting Weaker Sales Activity

Chestertons recorded a 10% year-on-year increase in lettings portal enquiries in June, following a 17% increase in May. Its parallel sales-market survey showed enquiries approximately 20% lower in June.

The agency interpreted this as evidence that some prospective buyers were postponing purchases because of economic and geopolitical uncertainty and remaining within the rental sector for longer.

This movement can support rental demand in the short term, particularly in London markets where would-be buyers and professional tenants compete for similar homes. It should not be treated as a guarantee of permanent rental growth.

If mortgage affordability improves or buyer confidence returns, part of that demand may move back into the sales market. Conversely, continued weakness in sales activity may maintain tenant numbers while making landlord disposals slower or more price-sensitive.

For an investor considering an exit, these opposing trends matter. The property may still let successfully at a strong rent, while attracting fewer buyers at the desired sale price.

That can make an immediate sale less attractive and increase the value of a temporary refinance-and-hold strategy.

The Renters’ Rights Act Changes More Than Rent Advertising

The rental-bidding restriction is only one part of a much wider restructuring of private tenancies in England.

From 1 May 2026, most existing assured shorthold tenancies became assured periodic tenancies. New assured tenancies are also periodic rather than fixed-term, and landlords can no longer use Section 21 to recover possession without establishing a statutory ground.

Landlords can generally increase rent only once a year, must provide at least two months’ notice and must use the prescribed process. Tenants can challenge an increase they believe exceeds the market rent.

The legislation also introduced restrictions on rent in advance, protections for tenants with children or receiving benefits and a right to request permission to keep a pet.

These reforms increase security for tenants but also affect how landlords manage risk. An owner may place greater importance on applicant assessment, documentation and the ability of the rent to cover rising costs over the following year.

Where rent can be increased only through a prescribed annual process, setting an uneconomic starting level can have longer consequences than under a more flexible arrangement.

The finance and letting strategies therefore need to be aligned before the tenancy begins.

Tenant Selection Is Becoming More Commercially Important

The end of Section 21 does not prevent a landlord from recovering possession where a valid legal ground exists, but it changes the process and removes the general no-fault route.

A landlord who needs to sell, move into the property or respond to serious rent arrears must use the relevant possession ground and satisfy the applicable conditions. Some grounds carry notice periods or restrictions on when they can be used.

Landlords may consequently become more cautious when selecting tenants. They need confidence that the applicant can support the rent and that the property suits the proposed household for more than a short fixed period.

This does not justify unlawful discrimination or arbitrary exclusion. The Act prohibits landlords and agents from refusing applicants simply because they receive benefits or have children.

It does mean that referencing, affordability evidence, guarantor requirements where permitted and appropriate insurance can become more important to the owner’s risk management.

A higher asking rent can also affect the applicant pool. Pushing the figure above the realistic market level may exclude otherwise suitable tenants and concentrate demand among a smaller group whose affordability must still be verified.

Portfolio Finance Should Be Based on Sustainable Rent

Buy-to-let lenders typically assess whether rental income provides sufficient coverage for the mortgage interest under a stressed calculation.

The precise interest-coverage ratio and stress rate vary by lender, borrower type, tax status, product and property. Specialist lenders may also apply different approaches to HMOs, multi-unit properties and limited-company borrowing.

A higher market rent can improve borrowing capacity where the valuer supports it. However, an ambitious asking rent does not automatically become an acceptable mortgage valuation.

The lender’s valuer will consider comparable evidence, location, property condition and sustainable demand. If the property is marketed at £3,000 a month but similar homes are consistently letting at £2,700, the lender may use the lower figure.

Landlords planning to refinance should therefore avoid basing the required loan solely on an untested rent increase. The property may need to be let at the new level, supported by current comparables or improved sufficiently to justify the higher figure.

This is especially important where the refinance is intended to repay an expiring fixed rate, release capital or support another acquisition.

Refinancing and Retaining May Be the Strongest Route

A landlord may still have a fundamentally sound asset despite regulatory pressure and higher mortgage costs.

The property may occupy a strong location, attract reliable tenant demand and have substantial equity. Selling into a weaker market could crystallise an unnecessary discount, particularly where sales enquiries are subdued.

In that situation, refinancing and retaining the property may be more commercial.

The review should compare the existing mortgage with product-transfer, remortgage and specialist lending options. It should also establish whether extending the term, changing the repayment structure or introducing capital from elsewhere in the portfolio would produce a more sustainable position.

A limited-company landlord may have access to different rental-coverage calculations or lender criteria from an individual borrower, although transferring an existing property into a company can create tax, legal, valuation and refinancing consequences.

Company ownership should not be adopted solely because the mortgage appears more flexible. Advice should consider Stamp Duty Land Tax, Capital Gains Tax, incorporation relief where relevant, legal ownership and the long-term extraction of profits.

Where the property already sits in an appropriate structure, refinancing can preserve the rental income while allowing the landlord to wait for a stronger sales environment.

Improving and Repositioning Can Protect the Margin

Some properties are viable but no longer competitive in their current condition.

A landlord may be able to improve the rent, reduce voids and broaden tenant demand through refurbishment, energy-efficiency work or a more fundamental change in the way the property is used.

The improvement must be economically justified. Replacing a kitchen, improving insulation or upgrading bathrooms may strengthen the letting proposition, but not every pound spent will be recovered through higher rent or value.

The landlord should model the total project cost, including lost rent, finance, professional fees and compliance work. The resulting rent should be supported by genuine demand rather than an assumption that a better finish always commands a substantial premium.

Where the property is being refinanced, the lender may assess its current condition rather than the hoped-for value after improvement. A further advance, second charge, short-term bridge or capital raised against another asset may be needed to complete the work.

The exit should be clear from the outset. After refurbishment, the property should either support a stronger term mortgage, generate a sustainable rent or become more saleable.

HMO or MUFB Conversion Is Not Simply a Yield Exercise

Converting a suitable property into a house in multiple occupation or multi-unit freehold block can improve gross income, but it introduces planning, licensing, valuation and management complexity.

The property must be physically and legally suitable. Room sizes, amenity standards, fire safety, planning use and local Article 4 directions can all affect whether the proposed model is viable.

The landlord must also determine whether the local tenant market supports the additional rooms or units at the required rent.

Mortgage lenders distinguish between standard buy-to-let, HMO and MUFB security. A lender willing to finance the existing single-let property may not accept it during conversion or after the works are complete.

Short-term refurbishment finance may therefore be required, followed by a specialist HMO or MUFB mortgage once the property is compliant, licensed and producing the relevant income.

A higher theoretical yield does not automatically produce a stronger investment. The additional interest, management, licensing and maintenance costs must be included in the analysis.

Selling Lower-Yielding Assets Can Strengthen the Portfolio

Regulation and refinancing pressure may provide a reason to reassess whether every property still deserves to be retained.

An asset acquired many years earlier may have significant equity but generate a relatively weak return on that equity. Another property may require expensive energy work, repeated maintenance or a mortgage that will become difficult to refinance.

Selling a weaker asset can release capital to reduce debt elsewhere, fund improvements to stronger properties or support new acquisitions with better yields.

The decision should be based on portfolio economics rather than the fact that the property has historically produced a profit.

A landlord should consider the net sale proceeds after mortgage repayment, tax, legal costs and agency fees. That amount can then be compared with the future income and capital prospects of retaining the asset.

Tax advice is essential because the most commercially attractive property to sell may not be the one with the simplest tax position.

A Weak Sales Market Can Complicate the Exit

Chestertons’ reported reduction in sales enquiries is particularly relevant to landlords already planning to leave the market.

A property may be correctly priced but take longer to sell because fewer buyers are actively searching. Where the asset is tenanted, the available purchaser pool may be further restricted to landlords unless vacant possession can be obtained through the correct legal process.

An owner facing an expiring mortgage may not have enough time to wait for the ideal buyer. Accepting a substantial discount can appear to be the only option.

Temporary refinancing may provide an alternative. A product transfer, specialist buy-to-let remortgage or short-term facility could allow the owner to repay the current lender and sell under less immediate pressure.

This strategy only works where the additional finance cost is justified by the likely improvement in the sale outcome. A six- or twelve-month delay is not automatically worthwhile if values continue to weaken or the property remains difficult to sell.

The landlord should compare the expected holding cost with the discount required for a faster disposal.

Raising Capital Against Stronger Properties Can Avoid a Forced Sale

Portfolio landlords do not always need to solve a problem using the property on which it arises.

A highly geared or poorly performing unit may have limited refinancing capacity, while another property in the portfolio may hold substantial equity and produce strong rental coverage.

Raising capital against the stronger asset can provide funds to reduce debt, complete regulatory work or support a planned disposal elsewhere.

This can be more efficient than accepting an expensive loan secured against the weaker property. It can also reduce the risk of selling at the wrong point in the market.

However, the strategy transfers part of the problem to another asset. The stronger property becomes more highly leveraged, and its cash flow must support the additional borrowing.

Portfolio-level debt should therefore be reviewed after the transaction, not merely the loan on each individual property.

Debt Restructuring Can Improve Portfolio Resilience

A landlord with several mortgages may have a mixture of fixed-rate expiry dates, loan-to-value positions and repayment methods.

Reviewing each mortgage separately can result in a collection of locally sensible decisions that leave the overall portfolio poorly structured. Too many loans may mature in the same year, or the strongest assets may carry little debt while weaker properties are heavily leveraged.

A portfolio review can identify whether debt should be redistributed, partially repaid or fixed for different periods.

The objective is not always to obtain the lowest available rate. Flexibility may matter more where a property could be sold or refurbished. A landlord planning a disposal may prefer a product with a smaller early repayment charge even where the headline rate is slightly higher.

Conversely, a core long-term asset may justify a longer fixed period if the landlord values payment certainty.

A coordinated maturity profile reduces the risk that several properties require refinancing during the same difficult market.

Regulation Can Affect Property Values Indirectly

The Renters’ Rights Act does not directly determine the value of a landlord’s property, but it can influence the income, costs and buyer demand underpinning that value.

An investor buying a tenanted asset will consider the rent, tenant profile, mortgage cost and ability to manage or ultimately recover possession. Increased compliance expenditure or uncertainty may reduce the price that investor is prepared to pay.

At the same time, stronger tenant demand and constrained rental supply can support income values in suitable locations.

The effect is unlikely to be uniform. High-quality, energy-efficient properties in strong rental markets may become more desirable. Lower-quality assets with weak yields or substantial work requirements may become harder to finance and sell.

Portfolio landlords should therefore expect a wider separation between stronger and weaker stock rather than one consistent market response.

Landlord Decisions Should Begin With Three Questions

The emerging behavioural changes make a structured review more useful than a general reaction to regulation.

The first question is whether the property should be refinanced and retained. This will depend on sustainable rent, mortgage pricing, equity, local demand and the landlord’s long-term objectives.

The second is whether it should be improved and repositioned. That may involve refurbishment, energy work or a legally appropriate change in use, supported by a credible finance and exit strategy.

The third is whether it should be sold or removed from the portfolio. The decision should account for market liquidity, tax, current finance and the opportunity to deploy the released capital more effectively elsewhere.

Different properties within the same portfolio can produce different answers.

The purpose of the review is not to defend ownership of every asset. It is to establish which properties continue to justify the debt, capital and management attention allocated to them.

Landlords Need to Review Profitability Before the Next Mortgage Expiry

The new tenancy rules are already affecting pricing behaviour, but rent is only one variable in the landlord’s financial position.

Mortgage interest, taxation, licensing, insurance, maintenance and future energy-efficiency expenditure all influence profitability. A property that appears viable on gross rent may produce a much weaker return after those costs are included.

The review should use the mortgage rate likely to apply after the current fixed period, not the rate being paid today. It should also include realistic allowances for voids, repairs and management.

Where the figures remain strong, the landlord may have a sound basis for refinancing and retaining the asset. Where the margin is narrow, an improvement plan or partial debt repayment may be required.

Where the projected return no longer compensates for the risk and capital employed, an orderly sale may be the stronger decision.

Regulation Is Accelerating Portfolio Professionalisation

The early response to the Renters’ Rights Act demonstrates that regulation does not simply impose a new rule and leave the market otherwise unchanged.

Landlords alter asking rents, applicant assessment, refurbishment timing and ownership decisions. Tenants adjust their search behaviour, while lenders and valuers respond to the resulting income and market evidence.

Chestertons’ data suggests that some landlords initially increased asking rents after rental bidding was prohibited, but that properties still needed to respond to genuine market demand. It also shows stronger lettings enquiries developing alongside weaker sales activity.

For professional landlords, these conditions create both risk and opportunity.

A weaker sales market can make an immediate exit less attractive, but stronger tenant demand may support retention. Higher regulation can reduce flexibility, but it may also favour well-managed and properly financed portfolios as less prepared owners leave.

The important decision is not whether to remain optimistic or pessimistic about the rental market. It is whether each property remains financeable, compliant and commercially productive under the new operating environment.

Landlords who assess rent, debt, regulation and asset quality together will be better placed to choose between refinancing, improving and selling. Those who review only the next mortgage product may miss the more important portfolio decision.