Can my neighbour attach things to my fence?
Not without your permission. If the fence is yours, it is your property, and hanging baskets, trellis, lights, wire, screws or climbing plants fixed to it are alterations to your property. Citizens Advice applies the same principle to painting a neighbour's fence on your own side. The practical point is weight and water: attachments add wind load and hold damp against the timber.
The starting point is that a fence is a structure someone owns, and its two faces are part of that structure. Citizens Advice states that you cannot make changes to your side of a neighbour's fence without their permission, painting being the example given, and the same reasoning covers fixings. Screwing a trellis batten, a bracket, a light or a length of wire into timber is a physical alteration. The rule runs both ways, which is worth remembering before you fix anything to a fence you have decided belongs to them.
Ownership is often unknown, and that changes the tone rather than the answer. Where the ownership or maintenance responsibility for a boundary cannot be determined, Land Registry treats the feature as a party boundary, and says alterations or replacement should only be done with the agreement of the adjoining owners. Trellis screwed to a shared fence is an alteration. So the conversation is the same in either case: ask, agree what is going up, and write it down. Refusing a single hanging basket outright tends to cost more goodwill than it saves.
There are real reasons to say no, and they are worth explaining. Weight and wind load are the main ones. A fence is built for its own sail area, and trellis, screening or a mature climber on top of it increases the load on posts already working hard in a Gloucestershire gale. Fixings also break the treatment envelope. Manufacturers require timber cut or drilled after treatment to be resealed with a preservative, and Jacksons excludes in-ground timber cut or drilled after factory treatment from its 25 year guarantee. Dense planting against panels holds damp too, which is where rot starts.
Practical ways through it. Offer a version you are happy with: fixings into the rails instead of the boards, a stated weight limit, or removal when the fence is next replaced. Suggest freestanding trellis on their own posts a few inches inside their land, which needs no permission from you and keeps the load off your fence. If something is already up and causing damage, ask in writing for it to be taken down and photograph the condition. When the fence does have to be replaced, our closeboard runs at a guide £90 to £130 per metre excluding VAT.
More in fence law and neighbours, or browse all 36 questions on the FAQ index.
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