Commercial Rent Review Dispute Resolved Before Arbitration

Background

The property was a mid-sized retail unit on a town centre high street, let on a 15-year lease with upward-only rent reviews every five years. At the third review, the landlord proposed increasing the rent from £55,000 to £72,000 per annum, based on comparable evidence from nearby lettings.

The tenant — an independent retailer who had traded from the unit for over a decade — argued that the high street had changed significantly since the lease was granted. Several national chains had left, footfall had declined, and comparable evidence supported a rent closer to £48,000.

Both sides had instructed RICS-registered surveyors, but their valuations were nearly £25,000 apart. The lease provided for determination by an independent arbitrator, and both parties had begun preparing submissions.

The Challenge

The core challenge was that both surveyors had used defensible methodologies but reached very different conclusions. The comparable evidence was genuinely mixed — some lettings supported higher rents, others lower — and the outcome of an arbitration was difficult to predict.

Beyond the rent figure itself, the relationship between landlord and tenant was at risk. The tenant was a good, long-standing occupier, and the landlord valued the stability. But the adversarial nature of the arbitration process was damaging what had been a productive commercial relationship.

The dispute value — measured as the net present value of the rent differential over the remaining lease term — was approximately £450,000.

The Mediation

The landlord, the tenant, and both surveyors attended a full-day mediation. The mediator’s understanding of commercial lease terms, rent review mechanics, and the realities of high street retail gave the process immediate credibility with all parties.

In the joint session, the surveyors were encouraged to present their comparable evidence side by side. This revealed that several of the comparables were distinguishable on closer examination — different lease terms, incentive packages, or physical configurations.

In private sessions, the commercial risk of losing a reliable tenant if the rent was set too high was explored with the landlord, and the cost and uncertainty of arbitration was explored with the tenant.

The Outcome

The parties agreed a reviewed rent of £60,000 per annum — a figure that both sides felt was fair given the mixed comparable evidence. Critically, they also agreed a phased increase over 18 months rather than a single uplift, giving the tenant time to adjust. The landlord agreed to a minor lease variation to permit the tenant to sublet part of the unit, which improved the tenant’s overall position. The arbitration was withdrawn, saving both parties significant costs and preserving a commercial relationship worth far more than the rent differential.