The short answer
The main physical fix is to soundproof the party wall you share with the neighbour — adding mass and separation with a direct-to-wall system, resilient bars or an independent stud wall, which typically costs around £900–£2,000 for a single wall. Before that, seal the easy leaks: gaps around sockets, skirting, floor edges and any holes where pipes pass through, because sound finds the smallest gap. Soft furnishings, bookcases against the shared wall and carpet with acoustic underlay all help at the margin. If the noise is persistent and unreasonable, it may amount to a statutory nuisance, which your local council's environmental health team can investigate under the Environmental Protection Act 1990. Soundproofing reduces noise; it rarely removes it entirely, so combining the physical fix with the right approach to the neighbour or council usually works best.
Neighbour noise has two answers: reduce it physically by treating the shared wall and sealing the leaks, and address it practically through the neighbour or, if needed, the council. Here is how both work.
The options
- Soundproof the party wall~£900–£2,000
- Seal sockets & gapslowest-priced first step
- Add mass to the walldenser boards
- Persistent noisecouncil can investigate
- Legal basisEnvironmental Protection Act 1990
The physical fixes
- Seal the leaks first: caulk gaps around sockets, skirting and floor edges, and seal where pipes or cables pass through the shared wall. This is the lowest-priced step and often the most overlooked.
- Soundproof the party wall: add a direct-to-wall acoustic system, resilient bars or an independent stud wall to put mass and separation between you and next door — typically £900–£2,000 for one wall.
- Help at the margin: a heavy bookcase against the shared wall, thick curtains, rugs and acoustic underlay all absorb a little sound, though they will not match a proper soundproofing build.
| Step | Mainly helps with | Relative cost |
|---|---|---|
| Seal sockets, gaps & pipes | airborne leaks | lowest |
| Add mass to the party wall | airborne noise | mid |
| Independent stud / resilient build | airborne + some impact | highest |
| Party wall (single) | shared-wall noise | £900–£2,000 |
General guidance — costs depend on the wall and system. Sourced UK guidance: trade soundproofing guides.
When noise becomes a nuisance
Where noise is persistent and unreasonable — not just everyday living sounds — it may be a statutory nuisance. The usual route is to keep a diary of dates, times and the type of noise, raise it politely with the neighbour first, and if that does not resolve it, contact your local council's environmental health team, who can investigate under the Environmental Protection Act 1990 and serve an abatement notice if the noise meets the legal threshold. For shared-wall building work itself, the Party Wall etc. Act 1996 may require notice to your neighbour. Physical soundproofing and the nuisance route are complementary — one reduces the noise you hear, the other addresses noise that should not be happening.
Want to quieten a shared wall?
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Frequently asked questions
How do I reduce noise from my neighbours?
Start by sealing the easy leaks — gaps around sockets, skirting, floor edges and pipework — then soundproof the shared party wall with added mass and separation, which typically costs around £900–£2,000. If the noise is persistent and unreasonable, your local council can investigate it as a possible statutory nuisance.
How much does it cost to soundproof a party wall?
A single party wall typically costs around £900–£2,000 depending on the system — a space-saving direct-to-wall build at the lower end and an independent stud wall at the higher end, which gives a stronger result but loses more room.
What can I do about noisy neighbours legally?
Keep a diary of the noise, raise it with the neighbour first, and if it continues contact your council's environmental health team, who can investigate under the Environmental Protection Act 1990 and act if the noise is a statutory nuisance.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific build. They are guidance, not a quotation.