A London homeowner has lost a four-year legal campaign to force her next-door neighbours to demolish part of their kitchen over a boundary encroachment measuring just 48 centimetres, following a First-tier Tribunal ruling in favor of the adjoining property owners.

The dispute emerged in Cottage Grove, Surbiton, after Cambridge-educated tax executive Susannah James purchased a £600,000 semi-detached house in 2021. Roughly twelve months after closing the transaction, James and her husband and business partner, Chris James, asserted that their neighbours’ ground-floor kitchen extension crossed over the official boundary line by less than half a metre. Rather than seeking an amicable compromise over the sliver of ground, the couple initiated formal legal action, accusing their neighbours of unlawful trespass and seeking a mandatory tribunal order to dismantle and remove the encroaching structure entirely.

A Decades-Old Boundary Buried Under Overgrowth

The adjoining homes in Surbiton were originally constructed as a single Victorian dwelling before later being partitioned into two separate semi-detached properties. Both residences feature single-storey kitchen additions extending into their respective back gardens. While the dividing fence line between the rear gardens appeared standard, an inspection of the building rooflines revealed an anomaly: the neighbouring kitchen noticeably stepped 48 centimetres onto the parcel registered to the James residence.

Tribunal records indicate that the tiny misalignment had persisted undetected for approximately 40 years. Thick external vegetation had concealed the structural overlap, and James acknowledged during proceedings that she had no idea she was purportedly acquiring a sliver of her neighbours’ interior living space when completing the £600,000 purchase.

The Tribunal Verdict on Adverse Possession

The owners of the adjoining property, Mina Sharma and Neil Deeley, had purchased their home in 2012, decades after the extension was originally erected in the early 1980s. When confronted with legal action demanding the partial destruction of their home, Sharma and Deeley did not challenge the underlying title maps. Instead, they mounted a defense anchored on adverse possession, colloquially known as squatters’ rights, arguing that the disputed 48-centimetre tract had been occupied continuously and openly as an integral part of the home for decades.

Judge Ewan Paton accepted overwhelming witness and historical evidence demonstrating that the extension had occupied the exact same footprint since at least October 2000, establishing well over 20 years of uncontested possession before James filed her legal complaint.

The construction and enjoyment of part of a house on neighbouring land was possibly the plainest example of factual possession combined with an intention to possess.

Why Long-Standing Physical Structures Override Paper Maps

In dismissing the Jameses’ demands for demolition, Judge Paton observed that property lines in the real world rarely match the mathematical precision shown on official diagrams. He highlighted that Ordnance Survey and Land Registry index maps frequently include minor curves, kinks, and irregular steps that standard homebuyers cannot realistically detect during routine viewings.

The judge concluded that buyers are fully entitled to proceed on the understanding that physical reality governs everyday occupation, noting that successive purchasers reasonably assumed they owned everything enclosed within their external walls. The decision establishes an unyielding barrier against extreme boundary litigation, affirming that historical physical occupation takes precedence over microscopic cartographic discrepancies.