Open Plan Office Acoustic Design in United Kingdom — BS 8233:2014 Requirements
Open plan workspaces, trading floors, collaborative offices. Typical volume: 500-5,000 m².
What BS 8233:2014 Requires for a Open Plan Office in United Kingdom
Regulation: BS 8233:2014 — referenced by London Plan Policy D14
RT60 target: ≤ 0.8s
Background noise limit: 35–40 dBA
Local note: London Plan Policy D14 requires acoustic assessment for major proposals.
How to Calculate BS 8233:2014 Compliance for a Open Plan Office in United Kingdom
- 1
Identify the applicable United Kingdom standard and target
Look up BS 8233:2014 for open plan office spaces in United Kingdom. The RT60 target is ≤ 0.8s. BS 8233:2014 — referenced by London Plan Policy D14.
- 2
Measure or model the room geometry
Record the length, width, and height of the room to calculate the volume. A typical open plan office has a volume of 500-5,000 m².
- 3
List all surfaces and their absorption coefficients
For each surface (floor, ceiling, walls, windows, doors), find the absorption coefficient at each octave band frequency (125 Hz to 4 kHz) from ISO 354 test data or a materials database.
- 4
Calculate total absorption and apply the Sabine or Eyring equation
Sum all surface absorption values: A = sum of (alpha x area). Then apply T60 = 0.161 x V / A (Sabine) or T60 = -0.161 x V / (S x ln(1 - alpha_avg)) (Eyring). Use Eyring when average alpha exceeds 0.20.
- 5
Compare result against BS 8233:2014 and specify treatment
If the calculated RT60 exceeds the target of ≤ 0.8s, specify additional absorption. Typical treatment cost in United Kingdom is £70–£120/m².
Cost of Compliance in United Kingdom
Treatment Cost Range
£70–£120/m²
Currency: £
What Affects Cost
- • Room volume and surface area
- • Target standard strictness
- • Existing acoustic conditions
- • Finish and material quality
How BS 8233:2014 Differs from Other Standards for Open Plan Office in United Kingdom
| Requirement | BS 8233:2014 | WELL v2 Feature 74 |
|---|---|---|
| RT60 Target | ≤ 0.8s | ≤ 0.5s (meeting rooms) |
| Background Noise | 35–40 dBA | ≤ 45 dBA |
| STI | Not specified | < 0.50 (privacy) |
| Cost Range | £70–£120/m² | £85–£140/m² |
Frequently Asked Questions
What RT60 does BS 8233:2014 require for a open plan office in United Kingdom?
BS 8233:2014 requires a reverberation time of ≤ 0.8s for open plan office spaces in United Kingdom. BS 8233:2014 — referenced by London Plan Policy D14. Measurement should be performed per ISO 3382-2 methodology.
What is the background noise limit for a open plan office in United Kingdom?
The background noise limit is 35–40 dBA under BS 8233:2014. This typically refers to HVAC and building services noise measured with the room unoccupied.
How much does acoustic treatment cost for a open plan office in United Kingdom?
Typical acoustic treatment for a open plan office in United Kingdom costs £70–£120/m². Costs vary based on finish quality, room size, and existing conditions.
Calculate BS 8233:2014 Compliance for Your Open Plan Office in United Kingdom
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