Most loan officers with the banks, require owner-builders to submit an itemized estimate in order to secure a construction loan. Get approved for a construction loan.One-Time Close New Home Construction Loans. Include the lot purchase, construction costs and a permanent loan. This includes detailed financial documents, a complete project plan, cost estimates, and contractor agreements. In this guide, we'll be providing all of the information you need to tackle your California construction loan journey with confidence. Use this tool to review your Loan Estimate to make sure it reflects what you discussed with the lender. Calculate your new construction loan or refinance options below. Input your details and hit Calculate to view your loan terms and an interactive graph. â–¡ Contractor Resume (include bank references with contact information for at least 3 recently complete projects).