Case Study

Party Wall Dispute Resolution CityLabs London

The Project

Earl Kendrick were appointed to assist in resolving a dispute between two commercial owners regarding the demolition and rebuilding of a deteriorated party fence wall where both tree roots and Japanese knotweed were alleged to have contributed to the instability.

commercial properties

party fence wall in severe disrepair

contributing causes

Our Goals

Objectives

To identify the true causes of the wall’s deterioration, determine each party’s degree of responsibility, ensure statutory compliance under the Party Wall etc. Act 1996, and support both owners in reaching a fair cost allocation while preserving their commercial relationship.

Outcomes

Following joint inspections, expert analysis, and structured negotiation, the parties agreed a cost-sharing arrangement reflecting both the adjoining owner’s tree impact and the building owner’s knotweed presence. This avoided escalation to litigation, provided clarity on liability, and enabled the safe reconstruction of the wall with full documentation and mutual agreement.

Location

CityLabs, London

Scope

Ensure statutory compliance under the Party Wall etc. Act 1996,

EK services provided

Neighbourly Matters

“Earl Kendrick identified the causes of wall deterioration, determined party responsibilities under the Party Wall Act 1996, and facilitated a fair cost allocation while preserving the commercial relationship between both owners.”

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Our Approach

We coordinated a joint inspection, obtained specialist advice on structural impact, reviewed statutory obligations, and guided both surveyors through a balanced evidence-based negotiation. Each contributing factor was assessed on merit, enabling discussions to centre on responsibility rather than accusation. This approach created a path to agreement without damaging the long-term working relationship between the two commercial owners.

The Result

The dispute concluded with a practical and equitable solution grounded in technical evidence. A cost-sharing agreement allowed the wall to be demolished and rebuilt safely, and the documented findings clarified the roles of both the tree roots and knotweed in the deterioration. The process remained transparent and proportionate, preventing unnecessary legal escalation and enabling the owners to progress with essential structural works.

FAQs

1. Why was cost allocation so difficult in this case?

The wall’s failure had more than one contributing factor, which meant neither owner held sole responsibility. The building owner attributed the damage to the adjoining owner’s tree, while the adjoining owner’s surveyor identified Japanese knotweed originating from the opposite side. When multiple causes overlap, the challenge is determining the extent to which each side contributed. This requires careful investigation, expert input, and negotiation to reach a fair proportion of responsibility.

2. How did the surveyors determine which factors caused the damage?

Both surveyors carried out a joint inspection and gathered specialist input on how tree roots and knotweed behave structurally. Tree roots can undermine foundations and push masonry out of alignment, while knotweed can penetrate cracks and accelerate deterioration. By comparing visible damage patterns with expert advice, the surveyors identified how each factor influenced the wall’s instability and used that evidence to guide discussions on cost-sharing and responsibility.

3. What role did the Party Wall etc. Act 1996 play in this dispute?

The Act provides a framework for notifying works, recording conditions, and agreeing responsibilities for shared structures. It does not automatically assign fault but ensures a transparent process where each owner’s rights are respected. The surveyors applied the Act to manage access, agree the method of demolition and rebuilding, and document findings. This structure reduced the risk of contentious claims by keeping discussions evidence-based and proportionate.

4. How did the adjoining owner’s surveyor protect their client’s interests?

They gathered evidence on the presence and impact of knotweed, obtained expert advice, and demonstrated how it contributed to the wall’s condition. They balanced firm advocacy with a fair approach, ensuring the final agreement reflected both sides’ involvement. Their role included explaining the legal position, negotiating constructively, and helping prevent unnecessary legal escalation by focusing on a solution that was technically justified and mutually acceptable.

5. What benefits arose from resolving the dispute without litigation?

Avoiding court saved both owners significant time, cost, and disruption. The technical issues were resolved more efficiently through expert discussion, and the relationship between the neighbouring commercial properties was preserved. A negotiated agreement also offered more flexibility than a court judgment, allowing the parties to tailor cost-sharing to their specific circumstances. Ultimately, both owners gained certainty, avoided reputational strain, and progressed with rebuilding the wall in a controlled, cooperative way.