Three Neighbors Build Shared Extension
Three London neighbors coordinated to build a shared second-storey extension on their terraced houses, streamlining planning approval and sharing costs. By joining forces, all three families created additional living space while achieving better design outcomes in the dense urban setting.
The project was orchestrated by architects Miska Leino, Leonoor Alkema, and Tom Surman, who all lived in the terraced houses and saw the potential for a coordinated effort. Their professional insight allowed them to navigate the complexities of planning permissions and design a cohesive extension that benefited all three properties. This professional-led approach was key to the project's success. By submitting a joint planning application, the neighbors presented a unified and well-considered plan to the local council, which can be more favorably received than individual, potentially conflicting, proposals. This collaborative approach often streamlines the approval process, as it demonstrates a coordinated effort to improve the housing stock while respecting the local character. Such applications can lead to better design outcomes that are more sympathetic to the original buildings and the surrounding streetscape. A significant advantage of this joint venture was the substantial cost savings achieved through shared resources. The neighbors were able to split the cost of scaffolding, materials, and labor, which would have been considerably higher for three separate projects. For instance, a single party wall was built for all three homes, a major expense in any extension, leading to significant savings for each family. The coordinated construction also minimized disruption for the residents. Instead of three separate, prolonged periods of noise and disturbance, the work was consolidated into a single, more efficient timeline. This approach is particularly beneficial in densely populated urban areas where the impact of construction on the neighborhood is a major consideration. For terraced houses in London, extending can be a complex process due to regulations regarding the party wall, right to light for neighbors, and strict planning controls in conservation areas. A joint project can simplify the Party Wall Act requirements, as the neighbors are already in agreement, and a unified design is more likely to address potential objections from other residents. The cost of a typical single-story extension in London can range from £2,500 to over £4,000 per square meter, excluding professional fees and VAT. By sharing costs for architects, structural engineers, and builders, the financial burden on each household is significantly reduced. This makes ambitious and high-quality extensions more accessible to homeowners. While not all neighbors have the advantage of being architects, this project serves as a model for how collaboration can unlock the potential of terraced housing. It highlights the benefits of communication and a shared vision in overcoming the financial and logistical hurdles of extending in a dense urban environment. The success of this project could encourage more homeowners to consider similar joint ventures.
