Can My Neighbour Build Up to My Boundary?

Your rights when a neighbour builds an extension or structure on or near your property boundary, including permitted development rules, party wall obligations, and what you can do.

Finding out that your neighbour is building close to your boundary can be alarming. But in many cases, building on or near a boundary is perfectly legal. Understanding the rules will help you know when you can object and when you cannot.

The Short Answer

Yes, your neighbour can generally build up to and even on the boundary line. There is no automatic "right to a gap" between properties in English planning law. However, there are rules about what they can build, how high it can be, and whether they need your consent or planning permission.

Permitted Development Near Boundaries

Under permitted development rights, your neighbour can build certain structures without planning permission. The rules that affect boundaries include:

Single storey rear extensions

Can extend up to 3 metres from the rear wall (detached houses: 4 metres) under normal PD, or up to 6 metres (detached: 8 metres) under the larger home extension scheme with prior notification
Must not exceed 4 metres in height
If within 2 metres of a boundary, eaves height must not exceed 3 metres

Outbuildings

Can be built right up to the boundary
If within 2 metres of a boundary, maximum height is 2.5 metres
Must not cover more than 50% of the garden
Must be single storey with no sleeping accommodation

Fences and walls

Can be built on the boundary line
Maximum height: 2 metres (or 1 metre if adjacent to a highway)
No planning permission needed within these limits

Party Wall Act

If your neighbour is building on or within certain distances of the boundary, they may need to serve a Party Wall Notice under the Party Wall etc. Act 1996. This applies when:

Building on the boundary line (even a garden wall)
Excavating within 3 metres of your property to a depth below your foundations
Excavating within 6 metres if the excavation would cut a 45-degree line from the bottom of your foundations

The Party Wall Act is separate from planning permission. Your neighbour might have planning permission (or not need it) but still owe you a Party Wall Notice. They must serve notice at least 2 months before work starts for building on the boundary, or 1 month for excavation.

When You Can Object

You can object to your neighbour's building work in several situations:

If they need planning permission

If the building work requires a planning application, you have the right to comment during the consultation period. Relevant grounds for objection include:

Overlooking and loss of privacy
Loss of light
Overbearing or dominant impact
Noise and disturbance during construction

If they breach permitted development rules

If the building exceeds PD limits (too high, too large, wrong position), your neighbour needs planning permission. If they have not applied, you can report this to your council's planning enforcement team.

If they breach the Party Wall Act

If your neighbour starts work without serving proper notice, you can seek an injunction through the county court. You can also appoint a surveyor at their expense.

What You Cannot Object To

You generally cannot object to:

Building that is within permitted development limits - even if you dislike it
Loss of a view - there is no legal right to a view in English law
Reduction in property value - this is not a material planning consideration
Building work that is simply annoying but compliant with the rules

Practical Steps

Talk to your neighbour first - most disputes can be resolved through conversation
Check the planning portal - search for applications on your council's website or on Planning Signal
Check if PD applies - measure the proposed structure against the permitted development limits
Ask about Party Wall - if work is on or near the boundary, ask if they have served notice
Contact your council - if you believe the work is unlawful, report it to planning enforcement