Planning Hub
Boundaries & neighbours
How close to a boundary you can build an oak garage, garden room or gazebo, the rules on overhanging eaves, and when to talk to your neighbour before you start.
Guidance on this page summarises the national rules for England. Different rules apply in Wales and Scotland, and local planning conditions, Article 4 directions and property-specific restrictions may apply. This is general information, not a formal planning determination. Confirm the position with the relevant local planning authority or building control body before starting work.
The boundary rules
Building close to a boundary
Boundary distance is one of the most common reasons a permitted development project turns into a full planning application. Here's how the rules work.
The 2m rule
Any part of an outbuilding within 2m of a boundary is limited to 2.5m in total height under permitted development. Move it further from the boundary and you can build to the full 4m dual-pitch height.
Eaves near a boundary
Eaves, gutters and roof overhangs count towards the building's footprint. A building that looks 1.8m off the boundary can fail PD once the gutter is added, so we design the overhang into the calculation.
No overhanging the boundary
Nothing, not even a gutter or a roof tile, may overhang your neighbour's land without consent. Where space is tight we set the frame back or design the roof to fall away from the boundary.
Curtilage and access
The building must sit within the curtilage of your dwelling, and you must keep access for maintenance. Shared drives and rights of way can affect where an outbuilding can sit.
Neighbours
Talking to your neighbour
A little communication goes a long way. Here's what's required, what's good practice, and where the law steps in.
Do I need to tell my neighbour?
For a permitted development outbuilding there's no formal requirement to consult neighbours. For a full planning application, the local authority notifies adjoining owners, and neighbours can comment. Good communication still helps, especially on shared boundaries.
Party wall
The Party Wall etc. Act 1996 may require formal notice if work involves building on or at the boundary, working on an existing party wall or party structure, or excavating below and close to a neighbour's foundation level. The exact excavation tests depend on distance, depth and the neighbouring foundations. Party-wall requirements are separate from planning permission and building regulations, so specialist advice should be obtained where they may apply.
Overlooking and loss of light
Neighbours can object to a planning application on overlooking, overshadowing or loss of light grounds. We position and design the building to minimise these effects from the outset.
Right to light
A long-standing right to light is a separate legal matter from planning. It rarely affects new outbuildings but can matter on tight plots. We flag it where relevant.
People also ask
Quick answers on boundaries
Straight answers to the questions homeowners ask most.
How close to a boundary can I build an oak outbuilding?
Under permitted development you can build right up to a boundary, but any part within 2m of it is limited to 2.5m total height. Further than 2m away, you can build to the full 4m dual-pitch height.
Do I need to tell my neighbour before building an oak garage?
For a permitted development outbuilding there's no formal requirement to consult neighbours. For a full planning application the local authority notifies adjoining owners. We recommend a polite word on tight plots regardless.
Can my oak roof overhang my neighbour's land?
No part of the building, including gutters and roof tiles, may overhang a neighbour's land without consent. We design the roof and guttering to fall within your plot where space is tight.
Does the Party Wall Act apply to oak outbuildings?
The Party Wall etc. Act 1996 may require formal notice if work involves building on or at the boundary, working on an existing party wall or party structure, or excavating below and close to a neighbour's foundation level. The exact excavation tests depend on distance, depth and the neighbouring foundations. Party-wall requirements are separate from planning permission and building regulations, so specialist advice should be obtained where they may apply.
Boundary & neighbour FAQ
Frequently asked
You can build up to the boundary, but any part within 2m of it is limited to 2.5m in total height. Further than 2m away, the permitted development height limits of 2.5m eaves and 4m dual-pitch ridge apply.
For a permitted development outbuilding there's no formal requirement to consult neighbours. For a full planning application, the local authority notifies adjoining owners and they can comment. We always recommend a polite word on tight plots.
No. Nothing, including gutters and roof tiles, may overhang a neighbour's land without consent. We design the roof and guttering to fall within your plot, or set the frame back where space is tight.
The Party Wall etc. Act 1996 may require formal notice if work involves building on or at the boundary, working on an existing party wall or party structure, or excavating below and close to a neighbour's foundation level. The exact excavation tests depend on distance, depth and the neighbouring foundations. Party-wall requirements are separate from planning permission and building regulations, so specialist advice should be obtained where they may apply.
Neighbours can comment on a full planning application on overlooking, overshadowing or loss of light grounds. We design and position the building to minimise these effects from the outset, which reduces the chance of a sustained objection.
Will This Need Planning Permission?
Every property and project is different. Before commissioning drawings, purchase a Planning Feasibility Appraisal and let our team assess the likely planning position.
Sources and review
- GOV.UK: Party Wall etc. Act 1996 overview
- GOV.UK: Party Wall notifiable work
- Planning Portal: outbuilding planning permission rules
Last reviewed: 4 September 2026
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