Can my neighbour build right up to the boundary?

Can Your Neighbour Build Right Up to the Boundary?

One of the most common concerns among homeowners is whether a neighbour can build right up to the shared boundary. The short answer is yes — under the Party Wall Act, your neighbour has the legal right to construct directly up to the line dividing your properties.

This right exists even if it makes you uncomfortable or raises questions about privacy and access. The Act supports what’s known as the "absolute right" to build right up to the boundary, provided they don’t encroach onto your land. However, while building flush to the line is allowed, constructing *across* it — such as placing a wall partly on your property — requires your explicit consent.

If a neighbour wants to build a wall that sits on both properties — known as a "party wall" — they must obtain your agreement first. Without it, they can’t proceed. This is a crucial safeguard, and the law is clear: no consent, no shared structure. That said, if you unreasonably withhold approval, there may be legal pathways for resolution through a surveyor or tribunal.

It's also worth noting that while the Party Wall Act grants certain rights, proper notice is still required. Most building work affecting boundaries or shared walls falls under its rules, meaning your neighbour should formally notify you before starting any project. This gives you the chance to raise concerns or request protections for your property.

In short, yes — your neighbour can build right up to the boundary. But they can’t ignore your rights in doing so. Open communication, clear understanding of the law, and timely notice can go a long way in preventing disputes and maintaining good relations. After all, walls may separate properties, but respect keeps neighbours close.