London operates under the UK Building Regulations 2024 administered by local borough councils. The Planning Portal and individual Local Authority Building Control (LABC) manage building approvals. Typical timelines are 4-8 weeks for approval. London has a population of approximately 9 million across 32 boroughs. The city has extensive conservation area protections and listed building requirements. Notable requirements include Part L energy efficiency, accessible design, fire safety compliance, and sustainability standards. Approval fees typically range from 0.3-0.6% of construction value. The city offers expedited approval for projects meeting sustainability criteria and has established standards protecting historic neighborhoods.