What is the current problem?
The current valuation framework under the Landlord and Tenant Act 1954 has two linked features.
First, the rent under the renewal tenancy is assessed under section 34 by reference to the market rent of the premises. The Act provides for the valuation date to be date of commencement of the new tenancy. However, because that is technically 3 months after the proceedings are disposed of and no one has a crystal ball, in practice the valuation date is effectively the date of the final court hearing when evidence is presented to the Court. That means the key valuation date is uncertain until late in the process.
Secondly, because the tenant remains in occupation under the continuation tenancy until the renewal proceedings end, there can be a substantial period between contractual expiry of the original tenancy and commencement of the renewal tenancy. During that period, the tenant generally continues to pay the existing rent unless interim rent is sought.
That combination creates a system in which: the renewal rent is often assessed by reference to market conditions at a late and uncertain date; the parties may not know the relevant valuation date until close to trial; litigation delay can materially alter the rental outcome; and interim rent rules may then apply that backdate the economic consequences of that valuation.
The Law Commission considers that this can produce both uncertainty and unfairness.
Why does the current regime matter?
The valuation date is not just a technical point for surveyors. It affects how parties behave throughout the renewal process.
For landlords, the current framework can make it difficult to predict the income attaching to the renewal tenancy and the continuation period. In a rising market, delay may work in the landlord’s favour if the rent is assessed later. In a falling market, the reverse is true.
For tenants, the uncertainty can complicate budgeting and increase the risk of a sizeable balancing payment if interim rent is later adjusted retrospectively. It may also affect whether it is commercially sensible to press on with proceedings, negotiate terms, or vacate.
For both parties, the current regime can distort settlement. A valuation linked to an uncertain future hearing date means neither side is negotiating against a fixed statutory benchmark. That can increase costs, widen the gap between valuation positions and make expert evidence more difficult to prepare.
The Law Commission's core concern
The real criticism is that the present law allows market movement during litigation to determine the rent payable under the renewal tenancy, even though the timing of litigation may depend on matters outside either party’s control, such as court listing delays.
Question 28
Question 27 asks consultees to choose between two broad models.
Option A: fix the valuation date and align it with a date linked to the section 25 or section 26 notice.
Under Option A, the rent under the renewal tenancy would be valued at an earlier fixed date linked to the statutory notice process. The renewal tenancy would then also commence from that fixed point.
This would be a substantial shift from the current model. Its main advantages are clear: the valuation date becomes fixed and known at an early stage; the scope for tactical delay is significantly reduced; expert valuation evidence can be prepared against a stable date (and without the need to incur the cost of supplemental expert evidence when new comparables are made whilst the renewal process is ongoing); the economic outcome becomes less dependent on court timetabling; and in many completed renewals, the need for a separate interim rent regime would largely disappear because the new tenancy would effectively run from the fixed date.
From a policy perspective, Option A is the more coherent reform. It aligns valuation, commencement and term calculation, and it better reflects the idea that the rent should be determined by reference to a neutral statutory point rather than the happenstance of litigation.
But it is not without difficulty. A fixed commencement date works most neatly where the renewal tenancy broadly mirrors the continuation tenancy. Problems arise if the demise changes, the rights or obligations under the new lease differ materially from the old lease or the renewal does not proceed to completion at all.
Option B: retain the current renewal valuation framework but simplify interim rent.
Option B is the less radical alternative. It would leave the current valuation date for the renewal tenancy broadly in place, but reform the interim rent rules so there is a simpler and more consistent basis of assessment.
The attraction of Option B is that it avoids a fundamental restructuring of the renewal machinery. It may appeal to those who see value in preserving the current approach to the new lease while tidying up the procedural complications around interim rent.
Its weakness, however, is equally clear. It does not solve the principal problem identified by the Law Commission: the uncertain and often late valuation date for the renewal tenancy itself. It simplifies the consequences, but not the cause.
Our view
For most market participants, Option A is likely to be the stronger long-term reform. If the aim is to reduce uncertainty, discourage tactical delay and modernise the valuation framework, a fixed statutory valuation date is more attractive than leaving the present hearing-date logic intact.
Question 28
If consultees support Option A, Question 28 asks what the fixed date should be. The Law Commission identifies two possibilities: the date six months after service of a section 25 or section 26 notice; or the expiry date stated in the notice itself.
The “6-month-expiry-date” fixes the valuation date at a point six months before the date specified in the notice.
Its main advantage is that it reduces tactical behaviour. Because the date is pegged to a neutral point in the statutory timetable, the serving party has less scope to influence the valuation date by choosing a longer notice period.
That makes it the more policy-neutral option and better aligned with the Law Commission’s objective of reducing strategic conduct.
Its possible drawback is conceptual neatness. Some may find it less intuitive to value and commence a new tenancy by reference to a date that precedes the notice expiry date itself or determination of the rent by agreement or the court.
Using the expiry date in the notice or request is simpler to identify and easier to explain. It uses the expiry date already stated in the statutory notice. The difficulty is that the expiry date can, within statutory limits, be selected by the party serving first. That creates a risk that the valuation date becomes vulnerable to tactical selection, particularly in a rising or falling market.
Our view
If Option A is pursued, the 6-month-expiry-date is likely to be the better choice. It is the more neutral and less manipulable date, and therefore better supports the policy aim of certainty without tactical distortion.
Why these questions matter for clients
These proposals go directly to the commercial risk profile of protected business tenancies.
For landlords: a fixed valuation date may improve income certainty; delay would become less valuable as a tactical lever; contested renewals may become easier to evaluate and settle; but additional valuation work may still be needed where the renewal tenancy differs from the old one.
For tenants: earlier certainty over rent would assist budgeting and strategy; the risk of substantial retrospective rent adjustment may be reduced; the scope for benefiting from delay in a falling market may narrow; but there may be concerns if the fixed date is too early and market conditions later move in the tenant’s favour.
For both: the proposals could materially affect negotiation behaviour; valuation evidence may become more streamlined in many cases, which could be is a significant benefit in some cases to reduce the costs of supplemental evidence; the pricing of continuation periods may become more principled; and the economics of whether to litigate or settle could shift.
AG view: a practical route through
In our view, the consultation points towards a sensible reform package: adopt Option A so that the valuation date is fixed by reference to the statutory notice timetable; use the 6-month-expiry-date as the preferred fixed date; allow targeted adjustment where the renewal tenancy differs materially from the continuation tenancy; and where no renewal tenancy is completed, assess interim rent by reference to the open market rent of a hypothetical tenancy on continuation tenancy terms.
That combination would not remove every valuation dispute, but it would create a more rational framework than the current one. It would also better align valuation outcomes with commercial reality and reduce the extent to which litigation timing drives rent.
Conclusion
Questions 27 and 28 may not be the most high-profile part of the Law Commission’s 1954 Act consultation, but they are commercially significant. They concern who bears the risk of market movement during the renewal process and whether rent should depend on a fixed statutory date or an uncertain future hearing.
The current framework is vulnerable to criticism because it can reward delay, complicate valuation evidence and generate arbitrary interim rent outcomes. The Law Commission’s consultation is right to test whether that structure should change.
Option B would improve the current machinery. Option A would address the underlying problem. On balance, a fixed valuation date linked to the notice process appears to offer the clearer and more durable reform.
Responses may be submitted online here, by email, or by post to: Business Tenancies Team, Law Commission, 1st Floor, 52 Queen Anne's Gate, London, SW1H 9AG by 16th September 2026. We are happy to assist any organisations with their responses.