Acoustic Insulation Costs UK — What to Charge for Soundproofing in 2026
Soundproofing is one of the most misunderstood trades in residential construction. Customers expect a quick fix; the reality is that effective acoustic insulation requires understanding the physics of sound transmission, choosing the right system for the noise type, and executing it without a single gap. Get it right and you can charge a significant premium. Get it wrong and you'll be handling complaints from a customer whose problem is just as bad as before.
This guide covers what to charge for acoustic insulation work across walls, floors, and ceilings — along with the technical background you need to quote confidently and deliver results that hold up.
Understanding the noise: airborne, impact, and flanking
Before you price a single job, you need to identify what type of noise the customer has. The wrong solution wastes their money and your reputation.
Airborne noise
Voices, TV, music — sound waves travelling through air. The solution is mass (dense layers stop sound waves) combined with resilient decoupling (breaking the rigid connection between layers so vibration can't travel through structure). A heavier, thicker wall reflects and absorbs more energy. Acoustic boards, dense insulation batts, and double-leaf construction all address this.
Impact noise
Footsteps, dropped objects, chair scrapes — vibration entering the structure directly. Mass alone does very little here. You need decoupling: resilient bars, acoustic clips, floating floor systems, or independent ceilings that break the rigid path the vibration is travelling along. This is why a thick concrete floor still transmits footstep noise clearly — the structure itself is the conductor.
Flanking noise
The most common reason soundproofing “doesn't work.” Sound bypasses the treated surface entirely by travelling around it — through the floor, ceiling, or adjoining walls at junctions. You treat the party wall perfectly, but sound still comes in because it's routing through the floor screed into the skirting board on the other side. Addressing flanking means treating junctions, isolating floating floors from perimeter walls, and sometimes treating adjacent surfaces too. Always flag this risk at quoting stage.
Wall soundproofing costs
Prices below assume an average wall of 3.5m wide × 2.4m high (~8.4m²) and are installed costs including materials and labour. London and South East add 15–25% to these figures.
| System | Typical improvement | Cost per wall |
|---|---|---|
| Single acoustic board (e.g. SoundBloc 15mm) | 3–5 dB extra | £600–£900 |
| Resilient bar + acoustic insulation + double board | 8–12 dB extra | £900–£1,600 |
| Independent stud wall + Rockwool RW3 + double board each side | 15–25 dB extra | £1,500–£2,500 |
| Acoustic wall panels (fabric-wrapped, studio spec) | Room acoustics, not transmission | £150–£400/m² |
Single acoustic board
The entry-level option — a single layer of 15mm acoustic plasterboard (British Gypsum SoundBloc is the standard spec) fixed directly to the existing wall. It adds mass without decoupling, so performance is modest. At 3–5 dB extra, the customer will notice a small improvement but not a dramatic one. Useful where room loss is the primary constraint and budget is tight, but always manage expectations clearly.
Resilient bar system
Resilient bars (typically RC-1 or similar) are fixed horizontally to the existing wall at 400–600mm centres. Acoustic insulation — Rockwool RW3, Knauf Earthwool Acoustic, or similar — is placed between. Two layers of acoustic plasterboard are then fixed to the bars. The bars flex slightly, breaking the rigid connection between the new board and the wall. This is the workhorse system for most domestic party-wall jobs. You lose about 35–50mm of room depth per wall treated.
Independent stud wall
The highest-performing wall solution for residential use. A new stud frame is built independently, touching neither the existing wall nor the floor — it stands on an acoustic isolation strip. The cavity is fully packed with Rockwool RW3. Double acoustic board is fixed to both the existing wall and the new stud. The complete air gap and lack of rigid connection between the two leaves is what makes this system effective at 15–25 dB improvement. It costs the most because it also consumes the most room depth (75–120mm). Recommend this for serious party-wall complaints or any job approaching Part E compliance.
Floor soundproofing costs
Floor prices assume a 15m² room. Impact noise is almost always the primary complaint for floors; airborne noise through floors is secondary. You need to address impact transmission before mass.
| System | Notes | Cost (15m²) |
|---|---|---|
| Acoustic underlay upgrade (Fibreboard or Regupol) | Minor improvement only | £400–£800 |
| Floating floor system (acoustic clips + battens + chipboard) | Good impact reduction | £1,500–£3,000 |
| Full system: floating floor + ceiling treatment below | Required for Part E conversions | £2,500–£5,000 |
Acoustic underlay
Swapping standard underlay for a high-density acoustic product (Fibreboard 6mm, Regupol, or similar) is the cheapest floor option and delivers the least improvement. It helps with the very highest frequencies of footstep noise but does little for low-frequency thuds. On existing timber floors where full access isn't available, this may be the only option — price it accordingly and be honest about the results.
Floating floor system
Acoustic isolation clips or resilient cradles are fixed to the existing floor structure. Timber battens sit on the clips; tongue-and-groove chipboard (or two layers of plywood) is laid across the battens. The finished floor surface then goes on top. Crucially, the floating floor must be isolated from the perimeter walls — a 10mm expansion gap with acoustic mastic is essential, otherwise the floating deck transmits impact directly into the wall structure, and you've created a new flanking path.
Full combined system
A floating floor above combined with a resilient ceiling treatment in the room below. This is the minimum required for Building Regulations Part E compliance in house-to-flat conversions. Treating only one surface rarely achieves the required 45 dB airborne and 62 dB impact thresholds. Price both surfaces together and make it clear to clients that splitting the work across two contractors increases the risk of non-compliance.
Ceiling soundproofing costs
Ceiling treatment is typically required when the complaint is impact noise from the flat above — footsteps, furniture movement. Prices again for a 15m² room.
| System | Notes | Cost (15m²) |
|---|---|---|
| Resilient bar + acoustic insulation + double board | Standard improvement | £1,200–£2,500 |
| Independent floating ceiling (independent hangers) | Best performance, more height loss | £2,000–£4,000 |
Resilient bar ceiling
Resilient bars (RC-1) are fixed to the existing ceiling joists at 400mm centres. Rockwool acoustic batts go into the joist bays. Two layers of acoustic board are screwed to the bars — never to the joists, which would bypass the decoupling entirely. The finished ceiling hangs 60–80mm below the original, which is a consideration in rooms with low clearance.
Independent floating ceiling
Independent acoustic hangers are fixed to the joists with rubber isolation elements. A new metal grid is suspended from these hangers. The board is fixed to the grid. Because the new ceiling is essentially hung on springs rather than rigid fixings, it decouples much more effectively from the structure above. This is the system to use for serious impact noise complaints or studio builds. It loses more ceiling height — typically 100–150mm — and is priced accordingly.
Important: adding mass to a ceiling without decoupling
If you fix additional plasterboard directly to existing joists — without resilient bars or independent hangers — you can actually make impact noise worse. The extra mass increases the energy the structure stores and re-radiates. Decoupling is non-negotiable for impact noise on ceilings. Make sure any subcontractor or labourer on site understands this before they start fixing.
Building Regulations Part E: what contractors need to know
Part E of the Building Regulations sets minimum sound insulation requirements. It applies in three main scenarios:
- New-build dwellings (houses and flats)
- Conversion of existing buildings into flats (the most common scenario contractors encounter)
- Material change of use — e.g. commercial to residential
Part E does not apply to like-for-like refurbishment of an existing dwelling. A homeowner renovating their own house doesn't need to meet Part E. But a landlord converting a house into two flats does.
The thresholds
| Element | Airborne (DnT,w + Ctr) | Impact (L'nT,w) |
|---|---|---|
| Separating walls (flats) | ≥ 45 dB | N/A |
| Separating floors (airborne) | ≥ 45 dB | — |
| Separating floors (impact) | — | ≤ 62 dB |
Good independent stud wall and full floor/ceiling systems comfortably exceed these thresholds. Pre-completion sound testing (also called PCB testing) must be carried out by an accredited tester before the building control sign-off. Budget £300–£500 per test — and note that a failed test means further remediation and retesting cost, which can spiral quickly. Getting the specification right before you start is far cheaper than a remedial visit after failure.
Labour rates for acoustic work in 2026
| Role | Day rate | Hourly |
|---|---|---|
| Specialist acoustic contractor | £250–£400/day | £35–£55/hr |
| General builder with acoustic knowledge | £180–£280/day | £25–£40/hr |
| Acoustic design consultant | £800–£1,600/day | £100–£200/hr |
| Pre-completion sound test (single pair) | £300–£500 | Per test |
On straightforward residential jobs — party wall treatment in a Victorian terrace, basic flat conversion — a competent general builder who understands acoustic principles can deliver good results. For high-spec music studios, home cinemas, or complex multi-room conversions, bring in an acoustic consultant at the design stage. Their fee will be recovered many times over in avoided remedial work and retesting.
Common mistakes that waste your customer's money
These are the errors that generate callbacks, bad reviews, and disputes. Know them cold so you can avoid them yourself and explain them to customers who've had bad work done elsewhere.
Treating only one surface
Soundproofing the party wall but ignoring the floor, ceiling, and adjacent wall junctions means sound simply routes around. The customer spends £1,500 on wall treatment and hears almost no improvement. Always assess the full sound path, not just the obvious surface.
Foam egg-crate and acoustic foam tiles
These products absorb reflected sound within a room — they improve room acoustics, not sound transmission between rooms. A recording vocal that sounds less reverby is the only benefit. They do nothing whatsoever to prevent noise from passing through walls and floors. Customers regularly buy these online thinking they're soundproofing their flat. They're not.
Gaps around electrical sockets, pipes, and at perimeters
A 1mm gap in a soundproofed wall can destroy most of the performance gain. Sound takes the path of least resistance. Back-to-back electrical sockets on a party wall are a classic flanking path. Sockets should be offset and the void behind sealed with acoustic mastic. All perimeters — where boards meet floor, ceiling, and return walls — need acoustic mastic or neoprene sealing strips, not just filler.
Floating floor touching the perimeter wall
If the floating deck makes rigid contact with the skirting board or wall, impact energy transfers straight into the structure and you lose the decoupling benefit entirely. The expansion gap must be maintained all around — 8–12mm is typical — and filled with acoustic mastic, not a rigid material.
How to quote soundproofing work properly
A good acoustic quote starts with three questions before you discuss price.
1. What type of noise is it?
Ask the customer to describe it. Is it voices and TV (airborne) or footsteps and thuds (impact)? Often it's both, but one will be the dominant complaint. This determines whether you lead with mass/resilient bar solutions or floating floor/ceiling decoupling.
2. When is it a problem — and how loud is it?
Daytime noise is regulated differently to night-time noise. A customer disturbed by a neighbour's TV at 11pm in bed has a different threshold of annoyance than one bothered at 3pm in the living room. Understanding the severity helps you specify appropriately and avoid underselling a system that won't actually resolve the complaint.
3. What's the target outcome?
“I just want it quieter” and “I need it to pass Part E for building control” are entirely different briefs. A customer who wants a noticeable improvement might be satisfied with a resilient bar system. A landlord converting to flats needs a specification that will pass pre-completion testing. Nail down the outcome before you quote — otherwise you're pricing without a target.
Set expectations clearly in the quote: domestic soundproofing delivers a meaningful, noticeable reduction in noise. It does not produce silence. Even the best residential systems are still permeated by very loud events — a party next door at high volume will still be audible, just dramatically less intrusive. Customers who expect a completely silent environment will be disappointed regardless of specification quality.
Include a note in your quote about flanking: that the quoted surfaces are treated and that flanking through untreated junctions is outside the scope and may limit overall performance. This protects you commercially and gives the customer a clear picture of what they're getting.
Quick-reference pricing summary
| Job type | Typical installed cost |
|---|---|
| Single acoustic board — per wall | £600–£900 |
| Resilient bar system — per wall | £900–£1,600 |
| Independent stud wall — per wall | £1,500–£2,500 |
| Acoustic underlay — 15m² room | £400–£800 |
| Floating floor system — 15m² room | £1,500–£3,000 |
| Full floor + ceiling system — 15m² room | £2,500–£5,000 |
| Resilient bar ceiling — 15m² room | £1,200–£2,500 |
| Independent floating ceiling — 15m² room | £2,000–£4,000 |
| Pre-completion Part E sound test | £300–£500 |
All prices are 2026 UK installed costs including materials and labour. London & South East add 15–25%. Prices exclude VAT.
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