Create legal requirements to retrofit upper floor conversions with soundproofing

Current housing regulations require a basic level of soundproofing, however residents of properties that were converted before these regulations were introduced - many with thin walls and old loose floorboards - do not enjoy such protections. Excessive daily impact and airborne noise is disruptive to daily life, and can be damaging to mental health and make a home feel like a trap. For the sufferer, soundproofing a ceiling can be an eye-watering cost, hugely disruptive, and may not even work. Soundproofing at source is more effective and cost efficient.