Homeowners in London and other urban areas are increasingly exploring the option of purchasing portions of neighbouring gardens to create additional outdoor space, amid frustrations over limited room in their existing properties. This trend reflects growing creativity in the residential property market, where garden size is seen as a valuable but scarce asset.

An increasing number of buyers are seeking to buy strips of adjacent land, often small but significant enough to enable improvements such as garden offices, raised beds, or extended play areas. Annabel Dean, a partner in a residential property law team, notes that these transactions can be economically beneficial for both parties. Sellers may unlock value from rarely used land, while buyers can enhance their gardens without the disruption or complexity of major extensions. However, such deals are often complex due to legal considerations including title boundaries, access rights, restrictive covenants, planning permission, and tax implications.

Architect Rupert Scott, who successfully expanded his property by negotiating land exchanges and purchases with neighbours in south London, emphasizes the importance of clear communication and preparation. He recommends presenting detailed plans to neighbours and allowing them time to consider, as this approach can lead to mutually beneficial agreements. The formal legal process typically involves a "Transfer of Part" with HM Land Registry, which generates a separate title for the acquired land. Conveyancing lawyer Cath Kehoe highlights several required checks, such as confirming there are no rights of way or covenants, and ensuring that the portion of land is released from any existing mortgage.

Despite these opportunities, the market for additional garden land is constrained by limited availability and high prices. According to Adam Morris, founder of a land search platform, most available plots in London are small and costly, with median prices around £425,000 and approximately £1 million per acre—significantly higher than other UK regions. A noted example involves a homeowner who spent £32,000 to buy 30ft of a neighbour’s garden after a lengthy five-year process.

While some see these acquisitions as practical enhancements, others express ethical concerns. One homeowner who completed a similar purchase admitted feeling “ashamed” about reducing a neighbour’s outdoor space, especially given wider social and environmental contexts. He underscored the importance of everyone having access to green space and questioned the broader implications of “land grabbing” in urban areas.

There is also debate about the actual financial benefit of expanding garden space. Estate agent Nick Robinson cautions that buying additional land may not always increase property value unless accompanied by planning permission for development. He points out that excessively large gardens can deter some buyers due to maintenance concerns, while small gardens under 30 feet can reduce property desirability.

Buyers are advised to approach these deals cautiously, with attention to legal and financial details. Morris warns that the registration of divided titles can take up to nine months, and overlooking mortgage or covenant restrictions can complicate or delay transactions.

For many, the dream of additional garden space remains elusive. One London couple’s attempts to purchase extra land were met with polite refusals from neighbours, leading them to instead focus on optimizing their existing garden through features like a sunken trampoline and a garden office.

This emerging trend highlights the growing premium on outdoor space in densely populated areas, along with the practical, legal, and ethical challenges homeowners face in seeking to expand their personal green spaces.