Soundproofing Costs UK — What to Charge for Walls, Floors and Ceilings in 2026

Airborne Noise vs Impact Noise — Get This Right Before You Quote

Almost every soundproofing job comes down to which of two noise types the customer is dealing with. Diagnosing it wrong is the single most common reason a soundproofing job "fails" and the customer refuses to pay.

Airborne noise travels through the air — voices, TVs, music, dogs barking. It passes through walls, floors and ceilings by vibrating the structure. You reduce it by adding mass (heavy, dense layers) and isolation (decoupling the surfaces so vibration can't transfer). This is what most party-wall and flat-to-flat complaints are about.

Impact noise is energy transmitted directly into the structure — footsteps on the floor above, furniture dragging, a washing machine on a hard floor. You can add all the mass you like to a ceiling and barely touch impact noise; it has to be tackled at the source with a floating floor, resilient underlay or acoustic cradle system in the room above. If a downstairs customer complains about footsteps, the real fix is often upstairs — flag this in your survey before you quote, because it changes the scope completely.

Quick Reference: Soundproofing Prices UK 2026

Rates assume bare-room access with making-good but not full redecoration. Add VAT where applicable, and price the decoration making-good separately — it is one of the biggest hidden costs and the one customers most often forget exists.

Soundproofing Walls

Party walls between terraced houses and flats are the most common wall job. There are two broad approaches, and the right one depends on how much floor space the customer is willing to lose and how good a result they need.

Independent (Free-Standing) Stud Wall

The best-performing wall solution is a fully independent stud wall built a few millimetres clear of the existing party wall, with no rigid contact between the two. The cavity is filled with acoustic mineral wool, and the new face is finished with two layers of acoustic plasterboard, ideally with a damping compound between them. Because nothing rigidly connects the new wall to the old one, vibration has no easy path across — this is the gold standard for airborne noise.

• Supply and fit: £90–£180/m²
• Space lost: typically 100–125mm off the room

Resilient Bar System (Space-Saving)

Where losing 125mm isn't acceptable, fix resilient bars horizontally to the existing wall, infill between them, and screw acoustic plasterboard to the bars only — never letting a screw touch the wall behind. The bar flexes and decouples the new board from the structure. It performs less well than a fully independent wall but loses only around 50–70mm and costs considerably less.

• Supply and fit: £40–£90/m²
• Space lost: typically 50–70mm

The most common installer error here is "short-circuiting" the resilient bars — a single rigid screw, a skirting board fixed through to the wall, or board edges touching the brickwork will undo most of the benefit. Detail it carefully and leave a perimeter gap sealed with acoustic sealant.

Soundproofing Floors

Floors are where you fix impact noise, and they're the jobs that matter most in flat conversions. The two main systems are floating floors and acoustic cradle (batten) systems.

A floating floor places a resilient layer — an acoustic foam or rubber underlay, or a deck system on resilient pads — between the structural floor and a new floating deck of acoustic boards or chipboard. Footsteps strike a surface that is isolated from the structure below, so far less energy passes through. For timber floors, you can also lift the boards and pack the voids with acoustic mineral wool, then add a resilient layer and a dense overlay board to deal with airborne noise at the same time.

• Supply and fit: £50–£120/m²
• Floor build-up height added: typically 20–50mm

Watch the floor height. Adding 50mm can foul door swings, throw out the bottom step of a staircase and create a trip hazard at thresholds. Measure door undercuts and threshold levels at survey and factor any door trimming or re-hanging into the quote.

Soundproofing Ceilings

Ceiling soundproofing is what a downstairs occupant asks for when they can hear the flat above. It works best for the airborne element (voices, TV) and helps a little with impact, but remember: impact noise is almost always better solved at the floor above. Set that expectation honestly or you'll be back arguing about a result you couldn't physically deliver.

A typical ceiling treatment lifts or overlays the existing ceiling, fills the joist voids with acoustic mineral wool, fixes resilient bars across the joists, and finishes with two layers of acoustic plasterboard and a damping compound. An independent (separately supported) ceiling performs better still but costs more and drops the ceiling height further.

• Supply and fit: £45–£100/m²
• Ceiling height lost: typically 50–100mm

Soundproofing Materials Explained

Customers will Google the products you mention, so it pays to know them and to specify the right one for the job. The main materials are:

• Acoustic plasterboard: A denser, heavier board than standard plasterboard. The added mass is what blocks airborne noise. Two layers staggered and bonded beat one thick layer.
• Resilient bars: Thin springy metal channels that decouple boards from the structure behind. Cheap, effective, and easy to ruin with a careless fixing.
• Mass-loaded vinyl (MLV): A flexible, very heavy membrane (often around 5kg/m²) used as a high-mass layer in tight build-ups where you can't afford the thickness of extra plasterboard.
• Acoustic mineral wool: Higher-density mineral wool (typically 45–100kg/m³) used to fill cavities, stud voids and joist voids. It absorbs sound energy inside the cavity — don't substitute cheap thermal loft roll, it won't perform.
• Damping compound (Green Glue and similar): A viscoelastic paste applied between two board layers. It converts vibration into tiny amounts of heat, improving low-frequency performance noticeably for a small material cost.
• Soundproofing mats and underlays: Resilient rubber or foam layers used under floating floors and behind boards to break the vibration path.
• Acoustic sealant: The cheapest material on the list and the one most often skipped. Any unsealed gap, socket cut-out or perimeter line is a direct noise leak — air gaps wreck performance.

Building Regulations Part E — When It Applies

Approved Document E (Resistance to the passage of sound) is the part of the Building Regulations that governs sound insulation between dwellings. It matters far more than most general builders realise, and it's the difference between a decorative job and a regulated one.

Part E applies whenever you create a new separating wall or floor between dwellings — most commonly when a house is converted into flats, or a commercial building is converted to residential. In these cases the separating elements must meet minimum sound insulation values, and crucially the work usually has to be proven, not just built to a spec.

• Pre-Completion Testing (PCT): An accredited tester carries out on-site airborne and impact sound tests on a sample of the separating elements before completion sign-off. Budget £500–£1,000 for testing and build it into the project price.
• Robust Details: For new-build separating walls and floors, registering an approved Robust Detail can exempt the project from PCT — but it's a defined route for new construction, not generally available for conversions.

If you take on a conversion and the separating floor fails its test, the cost of stripping out and re-doing the work falls on you unless responsibility was clearly defined in writing. On any flat conversion, confirm at quote stage who is arranging the acoustic test and who carries the risk if it fails. A simple decorative "soundproofing" upgrade between two rooms in the same dwelling, by contrast, is not regulated by Part E and can be specified on performance alone.

What Affects the Quote

Two soundproofing jobs of the same square meterage can differ by thousands of pounds. The variables that move the price most are:

• Degree of reduction required: "Take the edge off" and "I can't hear them at all" are completely different jobs. Genuine high performance means independent walls, double board layers and damping — price it accordingly and don't over-promise on a budget build-up.
• Access and room size: Small rooms have a high ratio of fiddly perimeter detailing to board area, so the per-m² rate rises. Awkward access, occupied homes and clearing furniture all add time.
• Decoration making-good: Re-skimming, re-skirting, moving radiators, sockets and switches, re-hanging doors and repainting. This routinely adds 20–40% on top of the acoustic build-up and is the cost customers forget. Itemise it.
• Services in the way: Radiators, electrical sockets, soil pipes and consumer units all need moving or boxing — and every penetration is a potential noise leak that has to be detailed.
• Whether testing is required: A Part E conversion carries PCT cost and the risk of a re-do; a private comfort upgrade does not.

How to Quote Soundproofing Profitably

The operators who make money on soundproofing do three things differently. First, they survey properly — diagnosing airborne vs impact noise, identifying the real transmission path, and checking floor heights, door swings and services before pricing. A wrong diagnosis is a non-paying job.

Second, they specify a defined system and quote against it, rather than vaguely promising "soundproofing". Name the build-up — independent stud, acoustic wool, two layers of acoustic board with damping — so expectations are pinned to a deliverable. Where appropriate, give the customer a good/better/best option so they self-select on budget instead of haggling you down.

Third, they itemise making-good and testing separately so the headline acoustic price isn't carrying hidden labour. This is also where margin leaks: track your actual hours and material spend per job against the quote so you can see which jobs and which build-ups truly make money. Tools like Trade2Base let you keep that quote-to-actual record in one place, so over a few jobs you can tighten your per-m² rates with real numbers rather than guesswork.

Soundproofing leads also tend to come from specific channels — local search, word of mouth from a previous flat conversion, a builder or letting agent referral. Trade2Base can tag where each enquiry came from and tie it back to the jobs that actually got booked and paid, so you put your marketing spend where the paying work is rather than where the enquiries merely look busy.