As Authorised SAP Assessors, Gen-Assess can provide the necessary documentation needed by building control for Part L1a and L1bcompliance. Assessments start at £40 for the "Design" or "As Built" stage. Part L1b assessments start at £150. Simply call Gen-Assess to discuss your requirements or send the plans, elevations and sections to our address. Contact Lynn Wildey- Energy Assessor for more details.