Milbarn Construction are a specialist Building company in Upminster, Essex. Below are some reasons why you should consider Milbarn Construction for your project: We are fully insured with a 5,000,000 pounds public liability package and a 10,000,000 pounds employers liability package. We are a financially stable company so therefore do not require any deposits prior to work beginning. We have a team of skilled, qualified, time served tradesmen, all with vast experience in their own trade. Our work is guaranteed. Our electricians are NIC EIC / part p approved. Our gas installers are Gas safe registered. Our costs are fair and.