Joint Single Storey Extension

A single-storey extension is a great way to add more space and value to your home. They can take a variety of forms and create new spaces for kitchens, dining rooms, living rooms, bedrooms, or bathrooms.

Collaborating with your neighbour(s) on an extension can lower costs and improve the efficiency of labour and materials, ultimately boosting the long-term value of the properties.

Joint Double Storey Extension

Double storey extensions offer a versatile and effective way to expand living space, boost property value, and improve the overall living experience. Their ability to maximise natural light, create open layouts, and accommodate additional bedrooms and bathrooms makes them an appealing choice for homeowners seeking to optimise their living arrangements.

Embarking on a double-storey extension project with your neighbour provides added advantages, including heightened chances of securing planning permission, absence of party wall concerns, lowered total expenses, enhanced efficiency in labour and materials, and a unified aesthetic appeal. These factors collectively contribute to enhancing the long-term value of both properties.

Joint Loft Conversion

Opting for a loft conversion presents homeowners with a host of advantages, making it an appealing choice for those in search of extra space, heightened comfort, and increased property value.

Though loft conversions can be expensive and cause disruption, embarking on a joint conversion project with your neighbour can alleviate these hurdles by curbing costs, and boosting efficiency during the design and build stages.

Bespoke Joint Project

It's not uncommon for you and your neighbour to pursue home improvements for different parts of your houses—for instance, one may desire a loft conversion while the other opts for a single-storey extension. Neighbouring Projects will listen closely to your needs, and devise a solution that saves you time, money, and reduces carbon emissions. Tell us about your bespoke project and book a free consultation.

Improving Energy Efficiency

Enhancing your home's energy efficiency not only cuts down on bills but also lessens your environmental footprint. Common steps include adding internal or external insulation, integrating solar panels, upgrading doors and windows, and optimising air tightness.

Collaborating with your neighbour on energy efficiency upgrades can lead to a more efficient strategy. For instance, insulating multiple terraced houses together requires less insulative material per house, ensuring a secure thermal barrier. Additionally, bulk purchasing of materials and simultaneous installation phases further enhance efficiency.

External Areas

Communal external spaces such as gardens and alleyways often suffer from neglect and deterioration. With expertise in landscape design, boundary construction, and shared amenities, Neighbouring Projects can assist neighbours in achieving their shared vision while optimising efficiency and reducing expenses.


How you approach your neighbour very much depends on your personal relationship with them. One effective method is to start with an informal conversation to gauge their interest. Highlight the mutual benefits, such as shared costs, minimise disruption, and increased property value. Our costs and carbon calculator and case studies page can help to illustrate potential savings.

It is important to listen to their perspective, be respectful of their position, and address any concerns they may have. Collaboration, negotiation, and flexibility are key to the success of any joint project.

We strive to minimise the risk of withdrawal by providing cost transparency and establishing budgets at the project's outset. Payment arrangements can be made in instalments, outlined in individual agreements tailored to each neighbour’s needs.

During the concept design phase, we advise consulting a Quantity Surveyor to develop a cost plan before advancing to subsequent stages. Upon obtaining planning permission, there's a three-year window for neighbours to coordinate finances before commencing construction.

If a neighbour must withdraw, we conduct a thorough reassessment of the project's viability with the remaining parties. The implications vary based on the project's stage, with earlier withdrawals allowing more flexibility to revise proposals and programme.

Neighbouring Projects support customers throughout the lifecycle of the project, unless agreed otherwise from the outset. Our services page details our offering at each stage of the project, from initial briefing to concept design, planning, building regulation approval, tender and finally construction.

We recommend vetted contractors and consultants from an approved list and assist in the selection process. During construction, our ambition is to act as Contract Administrator - inspecting workmanship and safeguarding quality on site while tracking progress against the project programme and budget. However, this can depend on the procurement route selected by the client.

No, the projects don't need to mirror each other. It's typical for neighbours to seek home improvements for different areas of their homes—for instance, one may desire a loft conversion while the other prefers a single-story extension. We'll carefully consider each neighbour's requirements and suggest tailored solutions, while striving for efficiencies in materials, time, and construction wherever feasible.

Tell us about your bespoke project and book a free consultation.

The cost and C02 savings were estimated following discussions with contractors, quantity surveyors, analysis of case studies, and research, supported by Innovate UK.

As actual costs can vary significantly due to numerous factors such as project specifications, location, and the economy, we cannot guarantee the accuracy of this estimate.

Therefore, these estimates are high level and we accept no liability for any losses incurred as a result of relying solely on this estimate.