SS 25268:2007 + Miljöbyggnad compliance guide for Stockholm architects and acoustic consultants.
Swedish acoustic standards are among the world's most stringent. SS 25268 defines 4 sound classes (A-D) with Class B being the typical design target for new buildings.
Primary Standard
SS 25268:2007 + Miljöbyggnad
Certification Body
Svenska Akustiska Sällskapet
RT60 Targets for Stockholm
Room Type
RT60 Target
Standard
Classroom
≤ 0.5s
SS 25268 Class B
Office (open plan)
≤ 0.6s
SS 25268 Class B
Residential living
R'w ≥ 56 dB (Class B)
SS 25267
Common Building Types in Stockholm Requiring Acoustic Design
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Residential (bostäder)
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Office developments
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School buildings (skolor)
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Healthcare facilities
Acoustic Consultants in Stockholm
Firms commonly working on acoustic design in Stockholm include ÅF Acoustics, WSP Sweden, Tyresö Akustik, and Acoustic Control. AcousPlan does not endorse specific firms \u2014 this list reflects commonly encountered practices in the Stockholm market. For projects requiring professional acoustic assessment, we recommend engaging a consultant accredited by Svenska Akustiska Sällskapet.
Frequently Asked Questions: Stockholm Acoustics
What is the Swedish sound class system?▾
SS 25268:2007 and SS 25267:2015 define 4 sound classes: Class A (excellent — premium housing and concert halls), Class B (good — standard for new buildings), Class C (acceptable — minimum for renovations), and Class D (poor — below acceptable limits). Class B requires R'w >= 56 dB between dwellings and L'n,w <= 52 dB for impact sound. Sweden's system is more stringent than most European countries at every class level.
What does Miljöbyggnad require for acoustics?▾
Miljöbyggnad (Environmental Building) awards up to Gold level with acoustic criteria under "Innemiljö" (Indoor Environment). Silver level requires SS 25268 Class B compliance; Gold requires enhanced performance approaching Class A. The assessment covers sound insulation, room acoustics, and mechanical noise. Miljöbyggnad certification is the most common green building rating in Sweden, with over 1,500 certified buildings.
What acoustic challenges are specific to Stockholm?▾
Stockholm-specific challenges include: T-bana (Metro) vibration affecting buildings above shallow tunnel sections, Arlanda airport noise zones affecting northern suburbs, maritime and port noise in waterfront developments (Hammarby Sjöstad, Norra Djurgårdsstaden), Sweden's ambitious timber construction targets (CLT buildings up to 8+ storeys) requiring innovative acoustic solutions, and extremely low background noise expectations from Swedish occupants accustomed to the world's quietest building interiors.
Check Your Stockholm Acoustic Compliance
Enter your room dimensions and surface materials to instantly calculate RT60 and check compliance with SS 25268:2007 + Miljöbyggnad.