Soundproofing a single wall in London typically costs £700–£1,500 fitted, with a full room treatment across walls, ceiling and floor running £11,000–£20,000 or more at a high specification, and the single most important thing to understand before you get a quote is that Building Regulations Part E and its mandatory pre-completion sound testing only apply when work creates a material change of use, such as converting a house into flats, not when you're voluntarily upgrading an existing wall or floor because a neighbour's noise is bothering you. This guide breaks down what drives the price for walls, ceilings and floors separately, since they're priced very differently and solve different noise problems, explains the Part E distinction in plain terms, and covers what to expect from the work itself.
How much does soundproofing cost in London in 2026?
Pricing varies more by which surface you're treating than by anything else, because walls, ceilings and floors use different construction methods and involve very different amounts of disruption. A single party wall or partition treated with resilient bar, acoustic quilt and double-layer acoustic plasterboard costs £700–£1,500 fitted for a typical room-sized wall. Ceiling work costs more per square metre because it's overhead and sometimes requires the existing ceiling to come down first, typically £900–£2,000 for a single room. Floor systems price at roughly £62.50–£87.50 per square metre for a standard resilient-layer-and-floating-floor build, so £1,000–£1,400 for a typical 16 square metre room, but this rises sharply, to £5,000–£12,000, where impact noise between flats requires a fully independent floor or ceiling construction rather than a surface-applied system.
The figures below are general market guidance based on typical London jobs, not a fixed quote for your property, since the actual price depends on the existing construction, access, and how many surfaces need treating.
Typical soundproofing costs in London, 2026
Item
Typical range
Notes
Single wall (resilient bar, quilt, double board)
£700–£1,500
Per typical room-sized wall, fitted
Ceiling (resilient bar or independent hang)
£900–£2,000
Higher spec independent ceilings cost more
Floor system, standard (resilient layer + floating floor)
£62.50–£87.50 per m2
Around £1,000–£1,400 for a 16m2 room
Floor and ceiling, high spec (impact noise between flats)
£5,000–£12,000
Independent construction on acoustic isolators
Full room (all walls, ceiling and floor, high spec)
£11,000–£20,000+
Home cinema or full acoustic upgrade
Part E pre-completion sound test
£400–£450 + VAT per test pair
Only where legally required, see below
These are general London market ranges for guidance, not a fixed quote. Your actual price depends on wall/floor construction, access, and site-specific factors, and should be confirmed by survey.
The one thing to understand before you get a quote: when Part E actually applies
Building Regulations Part E, resistance to the passage of sound, sounds like it should apply to every soundproofing job, but it doesn't. It's a legal requirement, including mandatory pre-completion sound testing by an approved testing body, only where the work creates a material change of use, the clearest example being converting a single house into two or more flats. In that scenario, tests typically cost £400–£450 plus VAT per pair of airborne and impact tests, with discounts if several flats on one site are tested during the same visit, and the property cannot be signed off as complete without a pass.
If you're simply upgrading an existing party wall because you can hear a neighbour's television, or building acoustic treatment into a home cinema, there is no legal testing requirement and no Building Control sign-off triggered by the acoustic work itself. Some contractors either overstate this to justify a higher price, implying every job needs formal testing, or understate it and fail to mention Part E at all when a client's project genuinely is a material change of use. Ask directly which category your project falls into before you agree a quote, and check with your local Building Control body if you're not sure whether your specific works count as a material change of use.
Wall, ceiling and floor systems: what's different about each
Walls
Wall treatment is the cheapest and least disruptive option, typically £700–£1,500 per wall, and works well for airborne noise, conversation, television, music, travelling between two rooms. The system is resilient bar fixed to the existing wall (never rigidly bridged to the structure at both ends), mineral wool acoustic quilt in the cavity created, and two layers of dense acoustic plasterboard, taped, jointed and sealed at every edge. It adds roughly 35-50mm to the wall thickness, which affects skirting and architrave but rarely requires structural changes.
Ceilings
Ceiling treatment costs more per square metre than walls, £900–£2,000 for a typical room, because the work is overhead and sometimes the existing ceiling has to be stripped out first if it's damaged or too low to take an extra layer. A resilient bar overlay works reasonably well for airborne noise from the room above, but if the complaint is footsteps and impact noise, an overlay alone usually isn't enough, since the structure itself, not just the ceiling surface, is transmitting the noise.
Floors
Floor systems address impact noise, the thing most between-flats noise complaints are actually about, and pricing splits clearly into two tiers. A standard resilient layer beneath a floating floor deck costs £62.50–£87.50 per square metre and works for moderate impact noise reduction. Where that's not enough, usually in older suspended timber floors with no existing insulation, a fully independent ceiling hung on acoustic isolators below the joists, rather than fixed to them, is the more effective but more invasive option, and costs £5,000–£12,000 for a typical room because of the additional structure involved.
What to expect on the day
Expect the room to be fully cleared and out of use for the duration, 2-3 days for a single wall, 3-5 days for a floor, longer for a full room treatment. Electrical first fix happens before any resilient bar or quilt goes up, relocating sockets so they sit properly within the new build-up depth rather than being extended awkwardly afterwards. The resilient layer is checked for continuity and no bridging fixings before boarding begins, since faults are far cheaper to catch at this stage than after two layers of plasterboard are screwed over them. Acoustic sealant goes into every edge and junction during boarding, and decoration always happens last, once any wet trades have fully dried, since painting over damp jointing compound is a common and avoidable cause of cracking.
After soundproofing: redecorating and related work
Once the acoustic work is complete and any jointing compound has fully dried, the room needs decorating to match the new wall or ceiling surface, which our painting and decorating London team handles as a natural next step. If you're building a brand new stud wall from scratch rather than upgrading an existing one, that's a different and generally cheaper job covered by our partitions and stud walls London service, which builds acoustic performance in from the start. And if you're planning to strip a wall back to the studs anyway for soundproofing, it's often worth considering whether thermal upgrades make sense in the same pass, which our eco retrofit and refurbishment London service covers, since opening the same wall twice for two separate projects rarely makes financial sense.
Questions
Frequently asked questions
What's the cheapest way to soundproof a room in London?
Treating a single party wall with resilient bar, acoustic quilt and double-layer plasterboard, at £700–£1,500, is the most cost-effective option, and it's the right choice if your noise problem is genuinely airborne noise through that one wall rather than footsteps from above.
Is soundproofing between flats a legal requirement?
Only in specific circumstances, mainly where a material change of use is happening, such as converting a house into flats, which triggers Part E and mandatory pre-completion sound testing. Upgrading an existing party wall or floor voluntarily in an already-established flat has no legal testing requirement.
How much does a Part E sound test cost in London?
Typically £400–£450 plus VAT per pair of airborne and impact tests, with prices starting from around £200 plus VAT for smaller single tests. Costs reduce per test if multiple flats on the same site are tested during one visit.
Why doesn't wall soundproofing stop footsteps from the flat above?
Footsteps are impact noise travelling through the floor structure itself, not through the air and then the wall. A wall system only addresses airborne noise between side-by-side rooms; stopping footfall noise requires treating the floor or ceiling structure directly.
Do I need a Party Wall Act notice to soundproof my wall?
Only if the wall being treated is the actual shared structure with a neighbouring property. If it's an internal wall entirely within your own flat, the Party Wall etc. Act 1996 doesn't apply; if it's the true party wall, notice must be served before work begins.
How much room space do I lose with acoustic wall treatment?
A typical resilient bar and double-board system adds around 35-50mm to the wall thickness, which affects skirting, architrave and occasionally door clearance, but has a minor impact on overall floor area for a single treated wall.
Can I just add acoustic foam panels instead of a proper wall system?
Foam panels reduce echo and reverberation within a room, which helps a home studio or cinema sound better internally, but they do very little to stop sound passing through to the next room. For genuinely blocking noise transmission, a resilient bar and mass-loaded system is needed instead.
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